On Tue, Aug 26, 2014 at 8:05 PM, Dallas Clement
<dallas.a.clem...@gmail.com> wrote:
> Hi All,
>
> I am trying to enable both SPI devices in the 3.14 kernel for a beaglebone
> black. I understand that the capemgr support is no longer there. I need
> some tips on how to enable these devices in the kernel. I don't care if it
> is done statically at kernel build time. My application has no need to
> runtime enabling/disabling as is possible with capemgr and device tree
> overlays.
>
> I see device tree source for spi0 but not spi1 in the 3.14 kernel source.
>
> ./arch/arm/boot/dts/am335x-bone-spi0-spidev.dtsi
>
> Looks like SPI support is half-baked. I am pulling my source from here:
>
> https://github.com/beagleboard/linux.git
>
> Am I going down the wrong path with 3.14? Building from the 3.8 branch in
> this repo has compilation errors.
Well, looks we have a volunteer.. Apply this on top of the latest 3.14
branch (i force pushed out an update about an hour ago)
Just enable either spi1/spi1a via:
#include "am335x-bone-spi1-spidev.dtsi"
(or)
#include "am335x-bone-spi1a-spidev.dtsi"
Regards,
--
Robert Nelson
http://www.rcn-ee.com/
--
For more options, visit http://beagleboard.org/discuss
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From c9835cb84fa92fced9b0b26e556fb15861d5257c Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnel...@gmail.com>
Date: Tue, 26 Aug 2014 20:26:40 -0500
Subject: [PATCH] testing: add spi1/spi1a
Signed-off-by: Robert Nelson <robertcnel...@gmail.com>
---
arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi | 21 +++++++++++++++++++
arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi | 26 ++++++++++++++++++++++++
arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi | 26 ++++++++++++++++++++++++
arch/arm/boot/dts/am335x-boneblack.dts | 14 +++++++++++++
4 files changed, 87 insertions(+)
create mode 100644 arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
create mode 100644 arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
diff --git a/arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi b/arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi
index 7519b71..4cef01c 100644
--- a/arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-common-pinmux.dtsi
@@ -303,6 +303,27 @@
>;
};
+ spi1_pins: pinmux_spi1_pins {
+ pinctrl-single,pins = <
+ 0x190 0x33 /* mcasp0_aclkx.spi1_sclk, INPUT_PULLUP | MODE3 */
+ 0x194 0x33 /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
+ 0x198 0x13 /* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
+ 0x19c 0x13 /* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
+ // 0x164 0x12 /* eCAP0_in_PWM0_out.spi1_cs1 OUTPUT_PULLUP | MODE2 */
+ >;
+ };
+
+ spi1a_pins: pinmux_spi1a_pins {
+ pinctrl-single,pins = <
+ 0x164 0x34 /* eCAP0_in_PWM0_out.spi1_sclk, INPUT_PULLUP | MODE4 */
+ /* NOTE: P9.42 is connected to two pads */
+ // 0x1A0 0x27 /* set the other pad to gpio input */
+ 0x194 0x33 /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
+ 0x198 0x13 /* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
+ 0x178 0x14 /* uart1_ctsn.spi1_cs0, OUTPUT_PULLUP | MODE4 */
+ >;
+ };
+
uart0_pins: pinmux_uart0_pins {
pinctrl-single,pins = <
0x170 (PIN_INPUT_PULLUP | MUX_MODE0) /* uart0_rxd.uart0_rxd */
diff --git a/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi b/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
new file mode 100644
index 0000000..24013d8a6b
--- /dev/null
+++ b/arch/arm/boot/dts/am335x-bone-spi1-spidev.dtsi
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+&spi1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi1_pins>;
+ status = "okay";
+
+ spidev0: spi@0 {
+ compatible = "spidev";
+ reg = <0>;
+ spi-max-frequency = <16000000>;
+ spi-cpha;
+ };
+
+ spidev1: spi@1 {
+ compatible = "spidev";
+ reg = <1>;
+ spi-max-frequency = <16000000>;
+ };
+};
diff --git a/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi b/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
new file mode 100644
index 0000000..b2185dd
--- /dev/null
+++ b/arch/arm/boot/dts/am335x-bone-spi1a-spidev.dtsi
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+&spi1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi1a_pins>;
+ status = "okay";
+
+ spidev0: spi@0 {
+ compatible = "spidev";
+ reg = <0>;
+ spi-max-frequency = <16000000>;
+ spi-cpha;
+ };
+
+ spidev1: spi@1 {
+ compatible = "spidev";
+ reg = <1>;
+ spi-max-frequency = <16000000>;
+ };
+};
diff --git a/arch/arm/boot/dts/am335x-boneblack.dts b/arch/arm/boot/dts/am335x-boneblack.dts
index 364e728..5778f3b 100644
--- a/arch/arm/boot/dts/am335x-boneblack.dts
+++ b/arch/arm/boot/dts/am335x-boneblack.dts
@@ -31,6 +31,20 @@
/* spi0: P9.17, P9.18, P9.21, P9.22 */
/* #include "am335x-bone-spi0-spidev.dtsi" */
+/* spi1: */
+/* P9.31 spi1_sclk */
+/* P9.29 spi1_d0 */
+/* P9.30 spi1_d1 */
+/* P9.28 spi1_cs0 */
+/* #include "am335x-bone-spi1-spidev.dtsi" */
+
+/* spi1a: */
+/* P9.42 spi1_sclk */
+/* P9.29 spi1_d0 */
+/* P9.30 spi1_d1 */
+/* P9.20 spi1_cs0 */
+/* #include "am335x-bone-spi1a-spidev.dtsi" */
+
/* uart1: P9.24, P9.26 */
/* #include "am335x-bone-ttyO1.dtsi" */
/* uart2: P9.21, P9.22 */
--
2.1.0
