[PATCH v2 2/4] arm64: dts: meson: disable pad bias for mmc pinmuxes

[Jerome Brunet]

In some cases (such as a boot from SPI) the bootloader or the ROM code may
leave a bias pull-down on the mmc pins. If so the MMC will fail during the
initialisation.

Explicitly disabling the pinmux solves the problem.

Signed-off-by: Jerome Brunet <jbru...@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi  | 2 ++
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 4 ++++
 arch/arm64/boot/dts/amlogic/meson-gxl.dtsi  | 4 ++++
 3 files changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index e86f5f721f8f..bc427b9d3e13 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -273,6 +273,7 @@
                                                         "emmc_cmd",
                                                         "emmc_ds";
                                                function = "emmc";
+                                               bias-disable;
                                        };
                                };
 
@@ -503,6 +504,7 @@
                                                         "sdio_cmd",
                                                         "sdio_clk";
                                                function = "sdio";
+                                               bias-disable;
                                        };
                                };
 
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index 1cb8e7e0d0da..32ef82321340 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -363,6 +363,7 @@
                                       "emmc_cmd",
                                       "emmc_clk";
                                function = "emmc";
+                               bias-disable;
                        };
                };
 
@@ -370,6 +371,7 @@
                        mux {
                                groups = "emmc_ds";
                                function = "emmc";
+                               bias-disable;
                        };
                };
 
@@ -416,6 +418,7 @@
                                       "sdcard_cmd",
                                       "sdcard_clk";
                                function = "sdcard";
+                               bias-disable;
                        };
                };
 
@@ -436,6 +439,7 @@
                                       "sdio_cmd",
                                       "sdio_clk";
                                function = "sdio";
+                               bias-disable;
                        };
                };
 
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
index 7cfee40d89e9..cfeec5579726 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl.dtsi
@@ -310,6 +310,7 @@
                                       "emmc_cmd",
                                       "emmc_clk";
                                function = "emmc";
+                               bias-disable;
                        };
                };
 
@@ -317,6 +318,7 @@
                        mux {
                                groups = "emmc_ds";
                                function = "emmc";
+                               bias-disable;
                        };
                };
 
@@ -363,6 +365,7 @@
                                       "sdcard_cmd",
                                       "sdcard_clk";
                                function = "sdcard";
+                               bias-disable;
                        };
                };
 
@@ -383,6 +386,7 @@
                                       "sdio_cmd",
                                       "sdio_clk";
                                function = "sdio";
+                               bias-disable;
                        };
                };
 
-- 
2.19.1