trunk-47381HEADmaster

1 files changed, 106 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch b/target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch
new file mode 100644
index 0000000..1a662a8
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch
@@ -0,0 +1,106 @@
+From a4c686a6a8cc5938de37451714add5ea872f67c2 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Fri, 6 Feb 2015 13:50:57 +0000
+Subject: [PATCH 053/203] 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.
+---
+ drivers/leds/trigger/Kconfig         |  7 ++++
+ drivers/leds/trigger/Makefile        |  1 +
+ drivers/leds/trigger/ledtrig-input.c | 65 ++++++++++++++++++++++++++++++++++++
+ 3 files changed, 73 insertions(+)
+ create mode 100644 drivers/leds/trigger/ledtrig-input.c
+
+--- a/drivers/leds/trigger/Kconfig
++++ b/drivers/leds/trigger/Kconfig
+@@ -126,4 +126,11 @@ config LEDS_TRIGGER_USBDEV
+ 	  This allows LEDs to be controlled by the presence/activity of
+ 	  an USB device. If unsure, say N.
+ 
++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
+--- a/drivers/leds/trigger/Makefile
++++ b/drivers/leds/trigger/Makefile
+@@ -8,3 +8,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CPU)		+= ledtr
+ obj-$(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
+--- /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");