[PATCH v2 3/4] arm64: dts: meson: consistently disable pin bias

Fri, 09 Nov 2018 06:06:02 -0800 

On Amlogic chipsets, the bias set through pinconf applies to the pad
itself, not only the GPIO function. This means that even when we change
the function of the pad from GPIO to anything else, the bias previously
set still applies.

As we have seen with the eMMC, depending on the bias type and the function,
it may trigger problems.

The underlying issue is that we inherit whatever was left by previous user
of the pad (pinconf, u-boot or the ROM code). As a consequence, the actual
setup we will get is undefined.

There is nothing mentioned in the documentation about pad bias and pinmux
function, however leaving it undefined is not an option.

This change consistently disable the pad bias for every pinmux functions.
It seems to work well, we can only assume that the necessary bias (if any)
is already provided by the pin function itself.

Signed-off-by: Jerome Brunet <jbru...@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi  | 103 ++++++++++++++++++++
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi |  47 +++++++++
 arch/arm64/boot/dts/amlogic/meson-gxl.dtsi  |  49 ++++++++++
 3 files changed, 199 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index bc427b9d3e13..e0139f174726 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -200,6 +200,7 @@
                                                groups = "i2c0_sck",
                                                         "i2c0_sda";
                                                function = "i2c0";
+                                               bias-disable;
                                        };
                                };
 
@@ -208,6 +209,7 @@
                                                groups = "i2c1_sck_x",
                                                         "i2c1_sda_x";
                                                function = "i2c1";
+                                               bias-disable;
                                        };
                                };
 
@@ -216,6 +218,7 @@
                                                groups = "i2c1_sck_z",
                                                         "i2c1_sda_z";
                                                function = "i2c1";
+                                               bias-disable;
                                        };
                                };
 
@@ -224,6 +227,7 @@
                                                groups = "i2c2_sck_a",
                                                         "i2c2_sda_a";
                                                function = "i2c2";
+                                               bias-disable;
                                        };
                                };
 
@@ -232,6 +236,7 @@
                                                groups = "i2c2_sck_x",
                                                         "i2c2_sda_x";
                                                function = "i2c2";
+                                               bias-disable;
                                        };
                                };
 
@@ -240,6 +245,7 @@
                                                groups = "i2c3_sda_a6",
                                                         "i2c3_sck_a7";
                                                function = "i2c3";
+                                               bias-disable;
                                        };
                                };
 
@@ -248,6 +254,7 @@
                                                groups = "i2c3_sda_a12",
                                                         "i2c3_sck_a13";
                                                function = "i2c3";
+                                               bias-disable;
                                        };
                                };
 
@@ -256,6 +263,7 @@
                                                groups = "i2c3_sda_a19",
                                                         "i2c3_sck_a20";
                                                function = "i2c3";
+                                               bias-disable;
                                        };
                                };
 
@@ -302,6 +310,7 @@
                                                         "eth_txd2_rgmii",
                                                         "eth_txd3_rgmii";
                                                function = "eth";
+                                               bias-disable;
                                        };
                                };
 
@@ -322,6 +331,7 @@
                                                         "eth_txd2_rgmii",
                                                         "eth_txd3_rgmii";
                                                function = "eth";
+                                               bias-disable;
                                        };
                                };
 
@@ -337,6 +347,7 @@
                                                         "eth_txd0_x",
                                                         "eth_txd1_x";
                                                function = "eth";
+                                               bias-disable;
                                        };
                                };
 
@@ -352,6 +363,7 @@
                                                         "eth_txd0_y",
                                                         "eth_txd1_y";
                                                function = "eth";
+                                               bias-disable;
                                        };
                                };
 
@@ -359,6 +371,7 @@
                                        mux {
                                                groups = "mclk_b";
                                                function = "mclk_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -366,6 +379,7 @@
                                        mux {
                                                groups = "mclk_c";
                                                function = "mclk_c";
+                                               bias-disable;
                                        };
                                };
 
@@ -373,6 +387,7 @@
                                        mux {
                                                groups = "pdm_dclk_a14";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -380,6 +395,7 @@
                                        mux {
                                                groups = "pdm_dclk_a19";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -387,6 +403,7 @@
                                        mux {
                                                groups = "pdm_din0";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -394,6 +411,7 @@
                                        mux {
                                                groups = "pdm_din1";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -401,6 +419,7 @@
                                        mux {
                                                groups = "pdm_din2";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -408,6 +427,7 @@
                                        mux {
                                                groups = "pdm_din3";
                                                function = "pdm";
+                                               bias-disable;
                                        };
                                };
 
@@ -415,6 +435,7 @@
                                        mux {
                                                groups = "pwm_a_a";
                                                function = "pwm_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -422,6 +443,7 @@
                                        mux {
                                                groups = "pwm_a_x18";
                                                function = "pwm_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -429,6 +451,7 @@
                                        mux {
                                                groups = "pwm_a_x20";
                                                function = "pwm_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -436,6 +459,7 @@
                                        mux {
                                                groups = "pwm_a_z";
                                                function = "pwm_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -443,6 +467,7 @@
                                        mux {
                                                groups = "pwm_b_a";
                                                function = "pwm_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -450,6 +475,7 @@
                                        mux {
                                                groups = "pwm_b_x";
                                                function = "pwm_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -457,6 +483,7 @@
                                        mux {
                                                groups = "pwm_b_z";
                                                function = "pwm_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -464,6 +491,7 @@
                                        mux {
                                                groups = "pwm_c_a";
                                                function = "pwm_c";
+                                               bias-disable;
                                        };
                                };
 
@@ -471,6 +499,7 @@
                                        mux {
                                                groups = "pwm_c_x10";
                                                function = "pwm_c";
+                                               bias-disable;
                                        };
                                };
 
@@ -478,6 +507,7 @@
                                        mux {
                                                groups = "pwm_c_x17";
                                                function = "pwm_c";
+                                               bias-disable;
                                        };
                                };
 
@@ -485,6 +515,7 @@
                                        mux {
                                                groups = "pwm_d_x11";
                                                function = "pwm_d";
+                                               bias-disable;
                                        };
                                };
 
@@ -492,6 +523,7 @@
                                        mux {
                                                groups = "pwm_d_x16";
                                                function = "pwm_d";
+                                               bias-disable;
                                        };
                                };
 
@@ -520,6 +552,7 @@
                                        mux {
                                                groups = "spdif_in_z";
                                                function = "spdif_in";
+                                               bias-disable;
                                        };
                                };
 
@@ -527,6 +560,7 @@
                                        mux {
                                                groups = "spdif_in_a1";
                                                function = "spdif_in";
+                                               bias-disable;
                                        };
                                };
 
@@ -534,6 +568,7 @@
                                        mux {
                                                groups = "spdif_in_a7";
                                                function = "spdif_in";
+                                               bias-disable;
                                        };
                                };
 
@@ -541,6 +576,7 @@
                                        mux {
                                                groups = "spdif_in_a19";
                                                function = "spdif_in";
+                                               bias-disable;
                                        };
                                };
 
@@ -548,6 +584,7 @@
                                        mux {
                                                groups = "spdif_in_a20";
                                                function = "spdif_in";
+                                               bias-disable;
                                        };
                                };
 
@@ -555,6 +592,7 @@
                                        mux {
                                                groups = "spdif_out_a1";
                                                function = "spdif_out";
+                                               bias-disable;
                                        };
                                };
 
@@ -562,6 +600,7 @@
                                        mux {
                                                groups = "spdif_out_a11";
                                                function = "spdif_out";
+                                               bias-disable;
                                        };
                                };
 
@@ -569,6 +608,7 @@
                                        mux {
                                                groups = "spdif_out_a19";
                                                function = "spdif_out";
+                                               bias-disable;
                                        };
                                };
 
@@ -576,6 +616,7 @@
                                        mux {
                                                groups = "spdif_out_a20";
                                                function = "spdif_out";
+                                               bias-disable;
                                        };
                                };
 
@@ -583,6 +624,7 @@
                                        mux {
                                                groups = "spdif_out_z";
                                                function = "spdif_out";
+                                               bias-disable;
                                        };
                                };
 
@@ -592,6 +634,7 @@
                                                         "spi0_mosi",
                                                         "spi0_clk";
                                                function = "spi0";
+                                               bias-disable;
                                        };
                                };
 
@@ -599,6 +642,7 @@
                                        mux {
                                                groups = "spi0_ss0";
                                                function = "spi0";
+                                               bias-disable;
                                        };
                                };
 
@@ -606,6 +650,7 @@
                                        mux {
                                                groups = "spi0_ss1";
                                                function = "spi0";
+                                               bias-disable;
                                        };
                                };
 
@@ -613,6 +658,7 @@
                                        mux {
                                                groups = "spi0_ss2";
                                                function = "spi0";
+                                               bias-disable;
                                        };
                                };
 
@@ -622,6 +668,7 @@
                                                         "spi1_mosi_a",
                                                         "spi1_clk_a";
                                                function = "spi1";
+                                               bias-disable;
                                        };
                                };
 
@@ -629,6 +676,7 @@
                                        mux {
                                                groups = "spi1_ss0_a";
                                                function = "spi1";
+                                               bias-disable;
                                        };
                                };
 
@@ -636,6 +684,7 @@
                                        mux {
                                                groups = "spi1_ss1";
                                                function = "spi1";
+                                               bias-disable;
                                        };
                                };
 
@@ -645,6 +694,7 @@
                                                         "spi1_mosi_x",
                                                         "spi1_clk_x";
                                                function = "spi1";
+                                               bias-disable;
                                        };
                                };
 
@@ -652,6 +702,7 @@
                                        mux {
                                                groups = "spi1_ss0_x";
                                                function = "spi1";
+                                               bias-disable;
                                        };
                                };
 
@@ -659,6 +710,7 @@
                                        mux {
                                                groups = "tdma_din0";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -666,6 +718,7 @@
                                        mux {
                                                groups = "tdma_dout0_x14";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -673,6 +726,7 @@
                                        mux {
                                                groups = "tdma_dout0_x15";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -680,6 +734,7 @@
                                        mux {
                                                groups = "tdma_dout1";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -687,6 +742,7 @@
                                        mux {
                                                groups = "tdma_din1";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -694,6 +750,7 @@
                                        mux {
                                                groups = "tdma_fs";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -701,6 +758,7 @@
                                        mux {
                                                groups = "tdma_fs_slv";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -708,6 +766,7 @@
                                        mux {
                                                groups = "tdma_sclk";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -715,6 +774,7 @@
                                        mux {
                                                groups = "tdma_sclk_slv";
                                                function = "tdma";
+                                               bias-disable;
                                        };
                                };
 
@@ -722,6 +782,7 @@
                                        mux {
                                                groups = "tdmb_din0";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -729,6 +790,7 @@
                                        mux {
                                                groups = "tdmb_din1";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -736,6 +798,7 @@
                                        mux {
                                                groups = "tdmb_din2";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -743,6 +806,7 @@
                                        mux {
                                                groups = "tdmb_din3";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -750,6 +814,7 @@
                                        mux {
                                                groups = "tdmb_dout0";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -757,6 +822,7 @@
                                        mux {
                                                groups = "tdmb_dout1";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -764,6 +830,7 @@
                                        mux {
                                                groups = "tdmb_dout2";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -771,6 +838,7 @@
                                        mux {
                                                groups = "tdmb_dout3";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -778,6 +846,7 @@
                                        mux {
                                                groups = "tdmb_fs";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -785,6 +854,7 @@
                                        mux {
                                                groups = "tdmb_fs_slv";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -792,6 +862,7 @@
                                        mux {
                                                groups = "tdmb_sclk";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -799,6 +870,7 @@
                                        mux {
                                                groups = "tdmb_sclk_slv";
                                                function = "tdmb";
+                                               bias-disable;
                                        };
                                };
 
@@ -806,6 +878,7 @@
                                        mux {
                                                groups = "tdmc_fs";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -813,6 +886,7 @@
                                        mux {
                                                groups = "tdmc_fs_slv";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -820,6 +894,7 @@
                                        mux {
                                                groups = "tdmc_sclk";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -827,6 +902,7 @@
                                        mux {
                                                groups = "tdmc_sclk_slv";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -834,6 +910,7 @@
                                        mux {
                                                groups = "tdmc_din0";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -841,6 +918,7 @@
                                        mux {
                                                groups = "tdmc_din1";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -848,6 +926,7 @@
                                        mux {
                                                groups = "tdmc_din2";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -855,6 +934,7 @@
                                        mux {
                                                groups = "tdmc_din3";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -862,6 +942,7 @@
                                        mux {
                                                groups = "tdmc_dout0";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -869,6 +950,7 @@
                                        mux {
                                                groups = "tdmc_dout1";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -876,6 +958,7 @@
                                        mux {
                                                groups = "tdmc_dout2";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -883,6 +966,7 @@
                                        mux {
                                                groups = "tdmc_dout3";
                                                function = "tdmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -891,6 +975,7 @@
                                                groups = "uart_tx_a",
                                                         "uart_rx_a";
                                                function = "uart_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -899,6 +984,7 @@
                                                groups = "uart_cts_a",
                                                         "uart_rts_a";
                                                function = "uart_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -907,6 +993,7 @@
                                                groups = "uart_tx_b_x",
                                                         "uart_rx_b_x";
                                                function = "uart_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -915,6 +1002,7 @@
                                                groups = "uart_cts_b_x",
                                                         "uart_rts_b_x";
                                                function = "uart_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -923,6 +1011,7 @@
                                                groups = "uart_tx_b_z",
                                                         "uart_rx_b_z";
                                                function = "uart_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -931,6 +1020,7 @@
                                                groups = "uart_cts_b_z",
                                                         "uart_rts_b_z";
                                                function = "uart_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -939,6 +1029,7 @@
                                                groups = "uart_ao_tx_b_z",
                                                         "uart_ao_rx_b_z";
                                                function = "uart_ao_b_z";
+                                               bias-disable;
                                        };
                                };
 
@@ -947,6 +1038,7 @@
                                                groups = "uart_ao_cts_b_z",
                                                         "uart_ao_rts_b_z";
                                                function = "uart_ao_b_z";
+                                               bias-disable;
                                        };
                                };
                        };
@@ -1235,6 +1327,7 @@
                                        mux {
                                                groups = "i2c_ao_sck_4";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1242,6 +1335,7 @@
                                        mux {
                                                groups = "i2c_ao_sck_8";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1249,6 +1343,7 @@
                                        mux {
                                                groups = "i2c_ao_sck_10";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1256,6 +1351,7 @@
                                        mux {
                                                groups = "i2c_ao_sda_5";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1263,6 +1359,7 @@
                                        mux {
                                                groups = "i2c_ao_sda_9";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1270,6 +1367,7 @@
                                        mux {
                                                groups = "i2c_ao_sda_11";
                                                function = "i2c_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1277,6 +1375,7 @@
                                        mux {
                                                groups = "remote_input_ao";
                                                function = "remote_input_ao";
+                                               bias-disable;
                                        };
                                };
 
@@ -1285,6 +1384,7 @@
                                                groups = "uart_ao_tx_a",
                                                         "uart_ao_rx_a";
                                                function = "uart_ao_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -1293,6 +1393,7 @@
                                                groups = "uart_ao_cts_a",
                                                         "uart_ao_rts_a";
                                                function = "uart_ao_a";
+                                               bias-disable;
                                        };
                                };
 
@@ -1301,6 +1402,7 @@
                                                groups = "uart_ao_tx_b",
                                                         "uart_ao_rx_b";
                                                function = "uart_ao_b";
+                                               bias-disable;
                                        };
                                };
 
@@ -1309,6 +1411,7 @@
                                                groups = "uart_ao_cts_b",
                                                         "uart_ao_rts_b";
                                                function = "uart_ao_b";
+                                               bias-disable;
                                        };
                                };
                        };
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 32ef82321340..6796d250985a 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -81,6 +81,7 @@
                        mux {
                                groups = "uart_tx_ao_a", "uart_rx_ao_a";
                                function = "uart_ao";
+                               bias-disable;
                        };
                };
 
@@ -89,6 +90,7 @@
                                groups = "uart_cts_ao_a",
                                       "uart_rts_ao_a";
                                function = "uart_ao";
+                               bias-disable;
                        };
                };
 
@@ -96,6 +98,7 @@
                        mux {
                                groups = "uart_tx_ao_b", "uart_rx_ao_b";
                                function = "uart_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -104,6 +107,7 @@
                                groups = "uart_cts_ao_b",
                                       "uart_rts_ao_b";
                                function = "uart_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -111,6 +115,7 @@
                        mux {
                                groups = "remote_input_ao";
                                function = "remote_input_ao";
+                               bias-disable;
                        };
                };
 
@@ -119,6 +124,7 @@
                                groups = "i2c_sck_ao",
                                       "i2c_sda_ao";
                                function = "i2c_ao";
+                               bias-disable;
                        };
                };
 
@@ -126,6 +132,7 @@
                        mux {
                                groups = "pwm_ao_a_3";
                                function = "pwm_ao_a_3";
+                               bias-disable;
                        };
                };
 
@@ -133,6 +140,7 @@
                        mux {
                                groups = "pwm_ao_a_6";
                                function = "pwm_ao_a_6";
+                               bias-disable;
                        };
                };
 
@@ -140,6 +148,7 @@
                        mux {
                                groups = "pwm_ao_a_12";
                                function = "pwm_ao_a_12";
+                               bias-disable;
                        };
                };
 
@@ -147,6 +156,7 @@
                        mux {
                                groups = "pwm_ao_b";
                                function = "pwm_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -154,6 +164,7 @@
                        mux {
                                groups = "i2s_am_clk";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -161,6 +172,7 @@
                        mux {
                                groups = "i2s_out_ao_clk";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -168,6 +180,7 @@
                        mux {
                                groups = "i2s_out_lr_clk";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -175,6 +188,7 @@
                        mux {
                                groups = "i2s_out_ch01_ao";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -182,6 +196,7 @@
                        mux {
                                groups = "i2s_out_ch23_ao";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -189,6 +204,7 @@
                        mux {
                                groups = "i2s_out_ch45_ao";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -203,6 +219,7 @@
                        mux {
                                groups = "spdif_out_ao_13";
                                function = "spdif_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -210,6 +227,7 @@
                        mux {
                                groups = "ao_cec";
                                function = "cec_ao";
+                               bias-disable;
                        };
                };
 
@@ -217,6 +235,7 @@
                        mux {
                                groups = "ee_cec";
                                function = "cec_ao";
+                               bias-disable;
                        };
                };
        };
@@ -390,6 +409,7 @@
                                       "nor_c",
                                       "nor_cs";
                                function = "nor";
+                               bias-disable;
                        };
                };
 
@@ -399,6 +419,7 @@
                                        "spi_mosi",
                                        "spi_sclk";
                                function = "spi";
+                               bias-disable;
                        };
                };
 
@@ -406,6 +427,7 @@
                        mux {
                                groups = "spi_ss0";
                                function = "spi";
+                               bias-disable;
                        };
                };
 
@@ -455,6 +477,7 @@
                        mux {
                                groups = "sdio_irq";
                                function = "sdio";
+                               bias-disable;
                        };
                };
 
@@ -463,6 +486,7 @@
                                groups = "uart_tx_a",
                                       "uart_rx_a";
                                function = "uart_a";
+                               bias-disable;
                        };
                };
 
@@ -471,6 +495,7 @@
                                groups = "uart_cts_a",
                                       "uart_rts_a";
                                function = "uart_a";
+                               bias-disable;
                        };
                };
 
@@ -479,6 +504,7 @@
                                groups = "uart_tx_b",
                                       "uart_rx_b";
                                function = "uart_b";
+                               bias-disable;
                        };
                };
 
@@ -487,6 +513,7 @@
                                groups = "uart_cts_b",
                                       "uart_rts_b";
                                function = "uart_b";
+                               bias-disable;
                        };
                };
 
@@ -495,6 +522,7 @@
                                groups = "uart_tx_c",
                                       "uart_rx_c";
                                function = "uart_c";
+                               bias-disable;
                        };
                };
 
@@ -503,6 +531,7 @@
                                groups = "uart_cts_c",
                                       "uart_rts_c";
                                function = "uart_c";
+                               bias-disable;
                        };
                };
 
@@ -511,6 +540,7 @@
                                groups = "i2c_sck_a",
                                       "i2c_sda_a";
                                function = "i2c_a";
+                               bias-disable;
                        };
                };
 
@@ -519,6 +549,7 @@
                                groups = "i2c_sck_b",
                                       "i2c_sda_b";
                                function = "i2c_b";
+                               bias-disable;
                        };
                };
 
@@ -527,6 +558,7 @@
                                groups = "i2c_sck_c",
                                       "i2c_sda_c";
                                function = "i2c_c";
+                               bias-disable;
                        };
                };
 
@@ -547,6 +579,7 @@
                                       "eth_txd2",
                                       "eth_txd3";
                                function = "eth";
+                               bias-disable;
                        };
                };
 
@@ -562,6 +595,7 @@
                                       "eth_txd0",
                                       "eth_txd1";
                                function = "eth";
+                               bias-disable;
                        };
                };
 
@@ -569,6 +603,7 @@
                        mux {
                                groups = "pwm_a_x";
                                function = "pwm_a_x";
+                               bias-disable;
                        };
                };
 
@@ -576,6 +611,7 @@
                        mux {
                                groups = "pwm_a_y";
                                function = "pwm_a_y";
+                               bias-disable;
                        };
                };
 
@@ -583,6 +619,7 @@
                        mux {
                                groups = "pwm_b";
                                function = "pwm_b";
+                               bias-disable;
                        };
                };
 
@@ -590,6 +627,7 @@
                        mux {
                                groups = "pwm_d";
                                function = "pwm_d";
+                               bias-disable;
                        };
                };
 
@@ -597,6 +635,7 @@
                        mux {
                                groups = "pwm_e";
                                function = "pwm_e";
+                               bias-disable;
                        };
                };
 
@@ -604,6 +643,7 @@
                        mux {
                                groups = "pwm_f_x";
                                function = "pwm_f_x";
+                               bias-disable;
                        };
                };
 
@@ -611,6 +651,7 @@
                        mux {
                                groups = "pwm_f_y";
                                function = "pwm_f_y";
+                               bias-disable;
                        };
                };
 
@@ -618,6 +659,7 @@
                        mux {
                                groups = "hdmi_hpd";
                                function = "hdmi_hpd";
+                               bias-disable;
                        };
                };
 
@@ -625,6 +667,7 @@
                        mux {
                                groups = "hdmi_sda", "hdmi_scl";
                                function = "hdmi_i2c";
+                               bias-disable;
                        };
                };
 
@@ -632,6 +675,7 @@
                        mux {
                                groups = "i2sout_ch23_y";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -639,6 +683,7 @@
                        mux {
                                groups = "i2sout_ch45_y";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -646,6 +691,7 @@
                        mux {
                                groups = "i2sout_ch67_y";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -653,6 +699,7 @@
                        mux {
                                groups = "spdif_out_y";
                                function = "spdif_out";
+                               bias-disable;
                        };
                };
        };
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
index cfeec5579726..ed278097825b 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
@@ -116,6 +116,7 @@
                        mux {
                                groups = "uart_tx_ao_a", "uart_rx_ao_a";
                                function = "uart_ao";
+                               bias-disable;
                        };
                };
 
@@ -124,6 +125,7 @@
                                groups = "uart_cts_ao_a",
                                       "uart_rts_ao_a";
                                function = "uart_ao";
+                               bias-disable;
                        };
                };
 
@@ -131,6 +133,7 @@
                        mux {
                                groups = "uart_tx_ao_b", "uart_rx_ao_b";
                                function = "uart_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -138,6 +141,7 @@
                        mux {
                                groups = "uart_tx_ao_b_0", "uart_rx_ao_b_1";
                                function = "uart_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -146,6 +150,7 @@
                                groups = "uart_cts_ao_b",
                                       "uart_rts_ao_b";
                                function = "uart_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -153,6 +158,7 @@
                        mux {
                                groups = "remote_input_ao";
                                function = "remote_input_ao";
+                               bias-disable;
                        };
                };
 
@@ -161,6 +167,7 @@
                                groups = "i2c_sck_ao",
                                       "i2c_sda_ao";
                                function = "i2c_ao";
+                               bias-disable;
                        };
                };
 
@@ -168,6 +175,7 @@
                        mux {
                                groups = "pwm_ao_a_3";
                                function = "pwm_ao_a";
+                               bias-disable;
                        };
                };
 
@@ -175,6 +183,7 @@
                        mux {
                                groups = "pwm_ao_a_8";
                                function = "pwm_ao_a";
+                               bias-disable;
                        };
                };
 
@@ -182,6 +191,7 @@
                        mux {
                                groups = "pwm_ao_b";
                                function = "pwm_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -189,6 +199,7 @@
                        mux {
                                groups = "pwm_ao_b_6";
                                function = "pwm_ao_b";
+                               bias-disable;
                        };
                };
 
@@ -196,6 +207,7 @@
                        mux {
                                groups = "i2s_out_ch23_ao";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -203,6 +215,7 @@
                        mux {
                                groups = "i2s_out_ch45_ao";
                                function = "i2s_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -210,6 +223,7 @@
                        mux {
                                groups = "spdif_out_ao_6";
                                function = "spdif_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -217,6 +231,7 @@
                        mux {
                                groups = "spdif_out_ao_9";
                                function = "spdif_out_ao";
+                               bias-disable;
                        };
                };
 
@@ -224,6 +239,7 @@
                        mux {
                                groups = "ao_cec";
                                function = "cec_ao";
+                               bias-disable;
                        };
                };
 
@@ -231,6 +247,7 @@
                        mux {
                                groups = "ee_cec";
                                function = "cec_ao";
+                               bias-disable;
                        };
                };
        };
@@ -337,6 +354,7 @@
                                       "nor_c",
                                       "nor_cs";
                                function = "nor";
+                               bias-disable;
                        };
                };
 
@@ -346,6 +364,7 @@
                                        "spi_mosi",
                                        "spi_sclk";
                                function = "spi";
+                               bias-disable;
                        };
                };
 
@@ -353,6 +372,7 @@
                        mux {
                                groups = "spi_ss0";
                                function = "spi";
+                               bias-disable;
                        };
                };
 
@@ -402,6 +422,7 @@
                        mux {
                                groups = "sdio_irq";
                                function = "sdio";
+                               bias-disable;
                        };
                };
 
@@ -410,6 +431,7 @@
                                groups = "uart_tx_a",
                                       "uart_rx_a";
                                function = "uart_a";
+                               bias-disable;
                        };
                };
 
@@ -418,6 +440,7 @@
                                groups = "uart_cts_a",
                                       "uart_rts_a";
                                function = "uart_a";
+                               bias-disable;
                        };
                };
 
@@ -426,6 +449,7 @@
                                groups = "uart_tx_b",
                                       "uart_rx_b";
                                function = "uart_b";
+                               bias-disable;
                        };
                };
 
@@ -434,6 +458,7 @@
                                groups = "uart_cts_b",
                                       "uart_rts_b";
                                function = "uart_b";
+                               bias-disable;
                        };
                };
 
@@ -442,6 +467,7 @@
                                groups = "uart_tx_c",
                                       "uart_rx_c";
                                function = "uart_c";
+                               bias-disable;
                        };
                };
 
@@ -450,6 +476,7 @@
                                groups = "uart_cts_c",
                                       "uart_rts_c";
                                function = "uart_c";
+                               bias-disable;
                        };
                };
 
@@ -458,6 +485,7 @@
                                groups = "i2c_sck_a",
                                     "i2c_sda_a";
                                function = "i2c_a";
+                               bias-disable;
                        };
                };
 
@@ -466,6 +494,7 @@
                                groups = "i2c_sck_b",
                                      "i2c_sda_b";
                                function = "i2c_b";
+                               bias-disable;
                        };
                };
 
@@ -474,6 +503,7 @@
                                groups = "i2c_sck_c",
                                      "i2c_sda_c";
                                function = "i2c_c";
+                               bias-disable;
                        };
                };
 
@@ -494,6 +524,7 @@
                                       "eth_txd2",
                                       "eth_txd3";
                                function = "eth";
+                               bias-disable;
                        };
                };
 
@@ -501,6 +532,7 @@
                        mux {
                                groups = "eth_link_led";
                                function = "eth_led";
+                               bias-disable;
                        };
                };
 
@@ -515,6 +547,7 @@
                        mux {
                                groups = "pwm_a";
                                function = "pwm_a";
+                               bias-disable;
                        };
                };
 
@@ -522,6 +555,7 @@
                        mux {
                                groups = "pwm_b";
                                function = "pwm_b";
+                               bias-disable;
                        };
                };
 
@@ -529,6 +563,7 @@
                        mux {
                                groups = "pwm_c";
                                function = "pwm_c";
+                               bias-disable;
                        };
                };
 
@@ -536,6 +571,7 @@
                        mux {
                                groups = "pwm_d";
                                function = "pwm_d";
+                               bias-disable;
                        };
                };
 
@@ -543,6 +579,7 @@
                        mux {
                                groups = "pwm_e";
                                function = "pwm_e";
+                               bias-disable;
                        };
                };
 
@@ -550,6 +587,7 @@
                        mux {
                                groups = "pwm_f_clk";
                                function = "pwm_f";
+                               bias-disable;
                        };
                };
 
@@ -557,6 +595,7 @@
                        mux {
                                groups = "pwm_f_x";
                                function = "pwm_f";
+                               bias-disable;
                        };
                };
 
@@ -564,6 +603,7 @@
                        mux {
                                groups = "hdmi_hpd";
                                function = "hdmi_hpd";
+                               bias-disable;
                        };
                };
 
@@ -571,6 +611,7 @@
                        mux {
                                groups = "hdmi_sda", "hdmi_scl";
                                function = "hdmi_i2c";
+                               bias-disable;
                        };
                };
 
@@ -578,6 +619,7 @@
                        mux {
                                groups = "i2s_am_clk";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -585,6 +627,7 @@
                        mux {
                                groups = "i2s_out_ao_clk";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -592,6 +635,7 @@
                        mux {
                                groups = "i2s_out_lr_clk";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -599,12 +643,14 @@
                        mux {
                                groups = "i2s_out_ch01";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
                i2sout_ch23_z_pins: i2sout_ch23_z {
                        mux {
                                groups = "i2sout_ch23_z";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -612,6 +658,7 @@
                        mux {
                                groups = "i2sout_ch45_z";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -619,6 +666,7 @@
                        mux {
                                groups = "i2sout_ch67_z";
                                function = "i2s_out";
+                               bias-disable;
                        };
                };
 
@@ -626,6 +674,7 @@
                        mux {
                                groups = "spdif_out_h";
                                function = "spdif_out";
+                               bias-disable;
                        };
                };
        };
-- 
2.19.1

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