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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch
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Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch')
-rw-r--r--target/linux/brcm2708/patches-4.1/0053-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch106
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");