83 lines
2.8 KiB
Diff
83 lines
2.8 KiB
Diff
From 39cf4677b7c38fac3da503b75d5cd7efc64dd19a Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Thu, 12 Feb 2015 11:17:53 +0000
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Subject: [PATCH 055/121] Fix LED "input" trigger implementation for 3.19
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---
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drivers/leds/leds-gpio.c | 10 +++++++++-
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drivers/leds/trigger/ledtrig-input.c | 19 ++++---------------
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include/linux/leds.h | 3 +++
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3 files changed, 16 insertions(+), 16 deletions(-)
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--- a/drivers/leds/leds-gpio.c
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+++ b/drivers/leds/leds-gpio.c
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@@ -41,6 +41,13 @@ static void gpio_led_work(struct work_st
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led_dat->platform_gpio_blink_set(led_dat->gpiod,
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led_dat->new_level, NULL, NULL);
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led_dat->blinking = 0;
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+ } else if (led_dat->cdev.flags & SET_GPIO_INPUT) {
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+ gpiod_direction_input(led_dat->gpiod);
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+ led_dat->cdev.flags &= ~SET_GPIO_INPUT;
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+ }
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+ else if (led_dat->cdev.flags & SET_GPIO_OUTPUT) {
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+ gpiod_direction_output(led_dat->gpiod, led_dat->new_level);
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+ led_dat->cdev.flags &= ~SET_GPIO_OUTPUT;
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} else
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gpiod_set_value_cansleep(led_dat->gpiod, led_dat->new_level);
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}
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@@ -61,7 +68,8 @@ static void gpio_led_set(struct led_clas
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* seem to have a reliable way to know if we're already in one; so
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* let's just assume the worst.
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*/
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- if (led_dat->can_sleep) {
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+ if (led_dat->can_sleep ||
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+ (led_dat->cdev.flags & (SET_GPIO_INPUT | SET_GPIO_OUTPUT) )) {
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led_dat->new_level = level;
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schedule_work(&led_dat->work);
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} else {
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--- a/drivers/leds/trigger/ledtrig-input.c
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+++ b/drivers/leds/trigger/ledtrig-input.c
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@@ -18,27 +18,16 @@
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#include <linux/gpio.h>
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#include "../leds.h"
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-/* This is a hack to get at the private 'gpio' member */
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-
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-struct gpio_led_data {
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- struct led_classdev cdev;
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- unsigned gpio;
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-};
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-
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static void input_trig_activate(struct led_classdev *led_cdev)
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{
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- struct gpio_led_data *led_dat =
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- container_of(led_cdev, struct gpio_led_data, cdev);
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- if (gpio_is_valid(led_dat->gpio))
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- gpio_direction_input(led_dat->gpio);
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+ led_cdev->flags |= SET_GPIO_INPUT;
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+ led_set_brightness_async(led_cdev, 0);
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}
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static void input_trig_deactivate(struct led_classdev *led_cdev)
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{
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- struct gpio_led_data *led_dat =
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- container_of(led_cdev, struct gpio_led_data, cdev);
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- if (gpio_is_valid(led_dat->gpio))
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- gpio_direction_output(led_dat->gpio, 0);
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+ led_cdev->flags |= SET_GPIO_OUTPUT;
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+ led_set_brightness_async(led_cdev, 0);
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}
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static struct led_trigger input_led_trigger = {
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--- a/include/linux/leds.h
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+++ b/include/linux/leds.h
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@@ -47,6 +47,9 @@ struct led_classdev {
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#define SET_BRIGHTNESS_ASYNC (1 << 21)
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#define SET_BRIGHTNESS_SYNC (1 << 22)
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#define LED_DEV_CAP_FLASH (1 << 23)
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+ /* Additions for Raspberry Pi PWR LED */
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+#define SET_GPIO_INPUT (1 << 30)
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+#define SET_GPIO_OUTPUT (1 << 31)
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/* Set LED brightness level */
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/* Must not sleep, use a workqueue if needed */
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