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From d34fbe19c2d2c7bb36c2f6432529f8404144a135 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Thu, 12 Feb 2015 11:17:53 +0000
Subject: [PATCH 055/148] Fix LED "input" trigger implementation for 3.19
---
drivers/leds/leds-gpio.c | 10 +++++++++-
drivers/leds/trigger/ledtrig-input.c | 19 ++++---------------
include/linux/leds.h | 3 +++
3 files changed, 16 insertions(+), 16 deletions(-)
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -41,6 +41,13 @@ static void gpio_led_work(struct work_st
led_dat->platform_gpio_blink_set(led_dat->gpiod,
led_dat->new_level, NULL, NULL);
led_dat->blinking = 0;
+ } else if (led_dat->cdev.flags & SET_GPIO_INPUT) {
+ gpiod_direction_input(led_dat->gpiod);
+ led_dat->cdev.flags &= ~SET_GPIO_INPUT;
+ }
+ else if (led_dat->cdev.flags & SET_GPIO_OUTPUT) {
+ gpiod_direction_output(led_dat->gpiod, led_dat->new_level);
+ led_dat->cdev.flags &= ~SET_GPIO_OUTPUT;
} else
gpiod_set_value_cansleep(led_dat->gpiod, led_dat->new_level);
}
@@ -61,7 +68,8 @@ static void gpio_led_set(struct led_clas
* seem to have a reliable way to know if we're already in one; so
* let's just assume the worst.
*/
- if (led_dat->can_sleep) {
+ if (led_dat->can_sleep ||
+ (led_dat->cdev.flags & (SET_GPIO_INPUT | SET_GPIO_OUTPUT) )) {
led_dat->new_level = level;
schedule_work(&led_dat->work);
} else {
--- a/drivers/leds/trigger/ledtrig-input.c
+++ b/drivers/leds/trigger/ledtrig-input.c
@@ -18,27 +18,16 @@
#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);
+ led_cdev->flags |= SET_GPIO_INPUT;
+ led_set_brightness_async(led_cdev, 0);
}
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);
+ led_cdev->flags |= SET_GPIO_OUTPUT;
+ led_set_brightness_async(led_cdev, 0);
}
static struct led_trigger input_led_trigger = {
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -47,6 +47,9 @@ struct led_classdev {
#define SET_BRIGHTNESS_ASYNC (1 << 21)
#define SET_BRIGHTNESS_SYNC (1 << 22)
#define LED_DEV_CAP_FLASH (1 << 23)
+ /* Additions for Raspberry Pi PWR LED */
+#define SET_GPIO_INPUT (1 << 30)
+#define SET_GPIO_OUTPUT (1 << 31)
/* Set LED brightness level */
/* Must not sleep, use a workqueue if needed */
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