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openwrtv4/target/linux/brcm2708/patches-3.18/0110-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch

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brcm2708: update to v3.18 Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 44392
2015-02-11 10:17:55 +00:00
From 5f1c4a04606c2fb2d0203bdbe364a6054b3bb0b7 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 6 Feb 2015 13:50:57 +0000
Subject: [PATCH 110/114] BCM270x_DT: Add pwr_led, and the required "input"
trigger
The "input" trigger makes the associated GPIO an input. This is to support
the Raspberry Pi PWR LED, which is driven by external hardware in normal use.
N.B. pwr_led is not available on Model A or B boards.
---
arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 18 ++++++++-
arch/arm/boot/dts/bcm2708-rpi-b.dts | 8 +++-
arch/arm/boot/dts/bcm2708.dtsi | 5 ---
arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 18 ++++++++-
arch/arm/boot/dts/bcm2709.dtsi | 5 ---
arch/arm/configs/bcm2709_defconfig | 1 +
arch/arm/configs/bcmrpi_defconfig | 1 +
drivers/leds/trigger/Kconfig | 7 ++++
drivers/leds/trigger/Makefile | 1 +
drivers/leds/trigger/ledtrig-input.c | 65 ++++++++++++++++++++++++++++++++
10 files changed, 113 insertions(+), 16 deletions(-)
create mode 100644 drivers/leds/trigger/ledtrig-input.c
diff --git a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
index 6b9512b..7f84473 100644
--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
@@ -83,8 +83,18 @@
pinctrl-0 = <&i2s_pins>;
};
-&act_led {
- gpios = <&gpio 47 0>;
+&leds {
+ act_led: act {
+ label = "led0";
+ linux,default-trigger = "mmc0";
+ gpios = <&gpio 47 0>;
+ };
+
+ pwr_led: pwr {
+ label = "led1";
+ linux,default-trigger = "input";
+ gpios = <&gpio 35 0>;
+ };
};
/ {
@@ -99,5 +109,9 @@
act_led_gpio = <&act_led>,"gpios:4";
act_led_activelow = <&act_led>,"gpios:8";
act_led_trigger = <&act_led>,"linux,default-trigger";
+
+ pwr_led_gpio = <&pwr_led>,"gpios:4";
+ pwr_led_activelow = <&pwr_led>,"gpios:8";
+ pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
};
};
diff --git a/arch/arm/boot/dts/bcm2708-rpi-b.dts b/arch/arm/boot/dts/bcm2708-rpi-b.dts
index b8520b55..a39562f 100644
--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
@@ -83,8 +83,12 @@
pinctrl-0 = <&i2s_pins>;
};
-&act_led {
- gpios = <&gpio 16 1>;
+&leds {
+ act_led: act {
+ label = "led0";
+ linux,default-trigger = "mmc0";
+ gpios = <&gpio 16 1>;
+ };
};
/ {
diff --git a/arch/arm/boot/dts/bcm2708.dtsi b/arch/arm/boot/dts/bcm2708.dtsi
index af6b1d9..aeeabae 100644
--- a/arch/arm/boot/dts/bcm2708.dtsi
+++ b/arch/arm/boot/dts/bcm2708.dtsi
@@ -79,11 +79,6 @@
leds: leds {
compatible = "gpio-leds";
-
- act_led: act {
- label = "led0";
- linux,default-trigger = "mmc0";
- };
};
};
diff --git a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
index 63d3da4..75c222f 100644
--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
+++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
@@ -83,8 +83,18 @@
pinctrl-0 = <&i2s_pins>;
};
-&act_led {
- gpios = <&gpio 47 0>;
+&leds {
+ act_led: act {
+ label = "led0";
+ linux,default-trigger = "mmc0";
+ gpios = <&gpio 47 0>;
+ };
+
+ pwr_led: pwr {
+ label = "led1";
+ linux,default-trigger = "input";
+ gpios = <&gpio 35 0>;
+ };
};
/ {
@@ -99,5 +109,9 @@
act_led_gpio = <&act_led>,"gpios:4";
act_led_activelow = <&act_led>,"gpios:8";
act_led_trigger = <&act_led>,"linux,default-trigger";
+
+ pwr_led_gpio = <&pwr_led>,"gpios:4";
+ pwr_led_activelow = <&pwr_led>,"gpios:8";
+ pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
};
};
diff --git a/arch/arm/boot/dts/bcm2709.dtsi b/arch/arm/boot/dts/bcm2709.dtsi
index fee2053..6986455 100644
--- a/arch/arm/boot/dts/bcm2709.dtsi
+++ b/arch/arm/boot/dts/bcm2709.dtsi
@@ -79,11 +79,6 @@
leds: leds {
compatible = "gpio-leds";
-
- act_led: act {
- label = "led0";
- linux,default-trigger = "mmc0";
- };
};
};
diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
index b5bf4cb..7bb9de6 100644
--- a/arch/arm/configs/bcm2709_defconfig
+++ b/arch/arm/configs/bcm2709_defconfig
@@ -959,6 +959,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
CONFIG_LEDS_TRIGGER_TRANSIENT=m
CONFIG_LEDS_TRIGGER_CAMERA=m
+CONFIG_LEDS_TRIGGER_INPUT=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
CONFIG_RTC_DRV_DS1307=m
diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
index 81c4387..3b09de9 100644
--- a/arch/arm/configs/bcmrpi_defconfig
+++ b/arch/arm/configs/bcmrpi_defconfig
@@ -952,6 +952,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
CONFIG_LEDS_TRIGGER_TRANSIENT=m
CONFIG_LEDS_TRIGGER_CAMERA=m
+CONFIG_LEDS_TRIGGER_INPUT=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_HCTOSYS is not set
CONFIG_RTC_DRV_DS1307=m
diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index 49794b4..640756b 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -108,4 +108,11 @@ config LEDS_TRIGGER_CAMERA
This enables direct flash/torch on/off by the driver, kernel space.
If unsure, say Y.
+config LEDS_TRIGGER_INPUT
+ tristate "LED Input Trigger"
+ depends on LEDS_TRIGGERS
+ help
+ This allows the GPIOs assigned to be LEDs to be initialised to inputs.
+ If unsure, say Y.
+
endif # LEDS_TRIGGERS
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
index 1abf48d..c03afdc 100644
--- a/drivers/leds/trigger/Makefile
+++ b/drivers/leds/trigger/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CPU) += ledtrig-cpu.o
obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
+obj-$(CONFIG_LEDS_TRIGGER_INPUT) += ledtrig-input.o
diff --git a/drivers/leds/trigger/ledtrig-input.c b/drivers/leds/trigger/ledtrig-input.c
new file mode 100644
index 0000000..2ca2b98
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-input.c
@@ -0,0 +1,65 @@
+/*
+ * Set LED GPIO to Input "Trigger"
+ *
+ * Copyright 2015 Phil Elwell <phil@raspberrypi.org>
+ *
+ * Based on Nick Forbes's ledtrig-default-on.c.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include "../leds.h"
+
+/* This is a hack to get at the private 'gpio' member */
+
+struct gpio_led_data {
+ struct led_classdev cdev;
+ unsigned gpio;
+};
+
+static void input_trig_activate(struct led_classdev *led_cdev)
+{
+ struct gpio_led_data *led_dat =
+ container_of(led_cdev, struct gpio_led_data, cdev);
+ if (gpio_is_valid(led_dat->gpio))
+ gpio_direction_input(led_dat->gpio);
+}
+
+static void input_trig_deactivate(struct led_classdev *led_cdev)
+{
+ struct gpio_led_data *led_dat =
+ container_of(led_cdev, struct gpio_led_data, cdev);
+ if (gpio_is_valid(led_dat->gpio))
+ gpio_direction_output(led_dat->gpio, 0);
+}
+
+static struct led_trigger input_led_trigger = {
+ .name = "input",
+ .activate = input_trig_activate,
+ .deactivate = input_trig_deactivate,
+};
+
+static int __init input_trig_init(void)
+{
+ return led_trigger_register(&input_led_trigger);
+}
+
+static void __exit input_trig_exit(void)
+{
+ led_trigger_unregister(&input_led_trigger);
+}
+
+module_init(input_trig_init);
+module_exit(input_trig_exit);
+
+MODULE_AUTHOR("Phil Elwell <phil@raspberrypi.org>");
+MODULE_DESCRIPTION("Set LED GPIO to Input \"trigger\"");
+MODULE_LICENSE("GPL");
--
1.8.3.2
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