diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0057-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0057-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0057-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch b/target/linux/bcm27xx/patches-4.19/950-0057-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch deleted file mode 100644 index b3839f6ad7..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0057-BCM270x_DT-Add-pwr_led-and-the-required-input-trigge.patch +++ /dev/null @@ -1,168 +0,0 @@ -From 7181db1685aa67e127f80fe9607270d3c87aa3b9 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Fri, 6 Feb 2015 13:50:57 +0000 -Subject: [PATCH] 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. - -leds-gpio: Implement the brightness_get method - -The power LED uses some clever logic that means it is driven -by a voltage measuring circuit when configured as input, otherwise -it is driven by the GPIO output value. This patch wires up the -brightness_get method for leds-gpio so that user-space can monitor -the LED value via /sys/class/gpio/led1/brightness. Using the input -trigger this returns an indication of the system power health, -otherwise it is just whatever value the trigger has written most -recently. - -See: https://github.com/raspberrypi/linux/issues/1064 ---- - drivers/leds/leds-gpio.c | 17 ++++++++- - drivers/leds/trigger/Kconfig | 7 ++++ - drivers/leds/trigger/Makefile | 1 + - drivers/leds/trigger/ledtrig-input.c | 55 ++++++++++++++++++++++++++++ - include/linux/leds.h | 3 ++ - 5 files changed, 82 insertions(+), 1 deletion(-) - create mode 100644 drivers/leds/trigger/ledtrig-input.c - ---- a/drivers/leds/leds-gpio.c -+++ b/drivers/leds/leds-gpio.c -@@ -50,8 +50,15 @@ static void gpio_led_set(struct led_clas - led_dat->platform_gpio_blink_set(led_dat->gpiod, 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, level); -+ led_dat->cdev.flags &= ~SET_GPIO_OUTPUT; - } else { -- if (led_dat->can_sleep) -+ if (led_dat->can_sleep || -+ (led_dat->cdev.flags & (SET_GPIO_INPUT | SET_GPIO_OUTPUT) )) - gpiod_set_value_cansleep(led_dat->gpiod, level); - else - gpiod_set_value(led_dat->gpiod, level); -@@ -65,6 +72,13 @@ static int gpio_led_set_blocking(struct - return 0; - } - -+static enum led_brightness gpio_led_get(struct led_classdev *led_cdev) -+{ -+ struct gpio_led_data *led_dat = -+ container_of(led_cdev, struct gpio_led_data, cdev); -+ return gpiod_get_value_cansleep(led_dat->gpiod) ? LED_FULL : LED_OFF; -+} -+ - static int gpio_blink_set(struct led_classdev *led_cdev, - unsigned long *delay_on, unsigned long *delay_off) - { -@@ -122,6 +136,7 @@ static int create_gpio_led(const struct - led_dat->platform_gpio_blink_set = blink_set; - led_dat->cdev.blink_set = gpio_blink_set; - } -+ led_dat->cdev.brightness_get = gpio_led_get; - if (template->default_state == LEDS_GPIO_DEFSTATE_KEEP) { - state = gpiod_get_value_cansleep(led_dat->gpiod); - if (state < 0) ---- a/drivers/leds/trigger/Kconfig -+++ b/drivers/leds/trigger/Kconfig -@@ -113,6 +113,13 @@ 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. -+ - config LEDS_TRIGGER_PANIC - bool "LED Panic Trigger" - help ---- a/drivers/leds/trigger/Makefile -+++ b/drivers/leds/trigger/Makefile -@@ -11,5 +11,6 @@ obj-$(CONFIG_LEDS_TRIGGER_ACTIVITY) += l - obj-$(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-$(CONFIG_LEDS_TRIGGER_INPUT) += ledtrig-input.o - obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o - obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o ---- /dev/null -+++ b/drivers/leds/trigger/ledtrig-input.c -@@ -0,0 +1,55 @@ -+/* -+ * 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" -+ -+static int input_trig_activate(struct led_classdev *led_cdev) -+{ -+ led_cdev->flags |= SET_GPIO_INPUT; -+ led_set_brightness(led_cdev, 0); -+ return 0; -+} -+ -+static void input_trig_deactivate(struct led_classdev *led_cdev) -+{ -+ led_cdev->flags |= SET_GPIO_OUTPUT; -+ led_set_brightness(led_cdev, 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"); ---- a/include/linux/leds.h -+++ b/include/linux/leds.h -@@ -50,6 +50,9 @@ struct led_classdev { - #define LED_PANIC_INDICATOR BIT(20) - #define LED_BRIGHT_HW_CHANGED BIT(21) - #define LED_RETAIN_AT_SHUTDOWN BIT(22) -+ /* Additions for Raspberry Pi PWR LED */ -+#define SET_GPIO_INPUT BIT(30) -+#define SET_GPIO_OUTPUT BIT(31) - - /* set_brightness_work / blink_timer flags, atomic, private. */ - unsigned long work_flags; |