1 From 5f1c4a04606c2fb2d0203bdbe364a6054b3bb0b7 Mon Sep 17 00:00:00 2001
2 From: Phil Elwell <phil@raspberrypi.org>
3 Date: Fri, 6 Feb 2015 13:50:57 +0000
4 Subject: [PATCH 110/114] BCM270x_DT: Add pwr_led, and the required "input"
7 The "input" trigger makes the associated GPIO an input. This is to support
8 the Raspberry Pi PWR LED, which is driven by external hardware in normal use.
10 N.B. pwr_led is not available on Model A or B boards.
12 arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 18 ++++++++-
13 arch/arm/boot/dts/bcm2708-rpi-b.dts | 8 +++-
14 arch/arm/boot/dts/bcm2708.dtsi | 5 ---
15 arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 18 ++++++++-
16 arch/arm/boot/dts/bcm2709.dtsi | 5 ---
17 arch/arm/configs/bcm2709_defconfig | 1 +
18 arch/arm/configs/bcmrpi_defconfig | 1 +
19 drivers/leds/trigger/Kconfig | 7 ++++
20 drivers/leds/trigger/Makefile | 1 +
21 drivers/leds/trigger/ledtrig-input.c | 65 ++++++++++++++++++++++++++++++++
22 10 files changed, 113 insertions(+), 16 deletions(-)
23 create mode 100644 drivers/leds/trigger/ledtrig-input.c
25 diff --git a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
26 index 6b9512b..7f84473 100644
27 --- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
28 +++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
30 pinctrl-0 = <&i2s_pins>;
34 - gpios = <&gpio 47 0>;
38 + linux,default-trigger = "mmc0";
39 + gpios = <&gpio 47 0>;
44 + linux,default-trigger = "input";
45 + gpios = <&gpio 35 0>;
51 act_led_gpio = <&act_led>,"gpios:4";
52 act_led_activelow = <&act_led>,"gpios:8";
53 act_led_trigger = <&act_led>,"linux,default-trigger";
55 + pwr_led_gpio = <&pwr_led>,"gpios:4";
56 + pwr_led_activelow = <&pwr_led>,"gpios:8";
57 + pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
60 diff --git a/arch/arm/boot/dts/bcm2708-rpi-b.dts b/arch/arm/boot/dts/bcm2708-rpi-b.dts
61 index b8520b55..a39562f 100644
62 --- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
63 +++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
65 pinctrl-0 = <&i2s_pins>;
69 - gpios = <&gpio 16 1>;
73 + linux,default-trigger = "mmc0";
74 + gpios = <&gpio 16 1>;
79 diff --git a/arch/arm/boot/dts/bcm2708.dtsi b/arch/arm/boot/dts/bcm2708.dtsi
80 index af6b1d9..aeeabae 100644
81 --- a/arch/arm/boot/dts/bcm2708.dtsi
82 +++ b/arch/arm/boot/dts/bcm2708.dtsi
86 compatible = "gpio-leds";
90 - linux,default-trigger = "mmc0";
95 diff --git a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
96 index 63d3da4..75c222f 100644
97 --- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
98 +++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
100 pinctrl-0 = <&i2s_pins>;
104 - gpios = <&gpio 47 0>;
108 + linux,default-trigger = "mmc0";
109 + gpios = <&gpio 47 0>;
114 + linux,default-trigger = "input";
115 + gpios = <&gpio 35 0>;
121 act_led_gpio = <&act_led>,"gpios:4";
122 act_led_activelow = <&act_led>,"gpios:8";
123 act_led_trigger = <&act_led>,"linux,default-trigger";
125 + pwr_led_gpio = <&pwr_led>,"gpios:4";
126 + pwr_led_activelow = <&pwr_led>,"gpios:8";
127 + pwr_led_trigger = <&pwr_led>,"linux,default-trigger";
130 diff --git a/arch/arm/boot/dts/bcm2709.dtsi b/arch/arm/boot/dts/bcm2709.dtsi
131 index fee2053..6986455 100644
132 --- a/arch/arm/boot/dts/bcm2709.dtsi
133 +++ b/arch/arm/boot/dts/bcm2709.dtsi
137 compatible = "gpio-leds";
141 - linux,default-trigger = "mmc0";
146 diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
147 index b5bf4cb..7bb9de6 100644
148 --- a/arch/arm/configs/bcm2709_defconfig
149 +++ b/arch/arm/configs/bcm2709_defconfig
150 @@ -959,6 +959,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
151 CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
152 CONFIG_LEDS_TRIGGER_TRANSIENT=m
153 CONFIG_LEDS_TRIGGER_CAMERA=m
154 +CONFIG_LEDS_TRIGGER_INPUT=y
156 # CONFIG_RTC_HCTOSYS is not set
157 CONFIG_RTC_DRV_DS1307=m
158 diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
159 index 81c4387..3b09de9 100644
160 --- a/arch/arm/configs/bcmrpi_defconfig
161 +++ b/arch/arm/configs/bcmrpi_defconfig
162 @@ -952,6 +952,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
163 CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
164 CONFIG_LEDS_TRIGGER_TRANSIENT=m
165 CONFIG_LEDS_TRIGGER_CAMERA=m
166 +CONFIG_LEDS_TRIGGER_INPUT=y
168 # CONFIG_RTC_HCTOSYS is not set
169 CONFIG_RTC_DRV_DS1307=m
170 diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
171 index 49794b4..640756b 100644
172 --- a/drivers/leds/trigger/Kconfig
173 +++ b/drivers/leds/trigger/Kconfig
174 @@ -108,4 +108,11 @@ config LEDS_TRIGGER_CAMERA
175 This enables direct flash/torch on/off by the driver, kernel space.
178 +config LEDS_TRIGGER_INPUT
179 + tristate "LED Input Trigger"
180 + depends on LEDS_TRIGGERS
182 + This allows the GPIOs assigned to be LEDs to be initialised to inputs.
185 endif # LEDS_TRIGGERS
186 diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
187 index 1abf48d..c03afdc 100644
188 --- a/drivers/leds/trigger/Makefile
189 +++ b/drivers/leds/trigger/Makefile
190 @@ -8,3 +8,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CPU) += ledtrig-cpu.o
191 obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
192 obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
193 obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
194 +obj-$(CONFIG_LEDS_TRIGGER_INPUT) += ledtrig-input.o
195 diff --git a/drivers/leds/trigger/ledtrig-input.c b/drivers/leds/trigger/ledtrig-input.c
197 index 0000000..2ca2b98
199 +++ b/drivers/leds/trigger/ledtrig-input.c
202 + * Set LED GPIO to Input "Trigger"
204 + * Copyright 2015 Phil Elwell <phil@raspberrypi.org>
206 + * Based on Nick Forbes's ledtrig-default-on.c.
208 + * This program is free software; you can redistribute it and/or modify
209 + * it under the terms of the GNU General Public License version 2 as
210 + * published by the Free Software Foundation.
214 +#include <linux/module.h>
215 +#include <linux/kernel.h>
216 +#include <linux/init.h>
217 +#include <linux/leds.h>
218 +#include <linux/gpio.h>
219 +#include "../leds.h"
221 +/* This is a hack to get at the private 'gpio' member */
223 +struct gpio_led_data {
224 + struct led_classdev cdev;
228 +static void input_trig_activate(struct led_classdev *led_cdev)
230 + struct gpio_led_data *led_dat =
231 + container_of(led_cdev, struct gpio_led_data, cdev);
232 + if (gpio_is_valid(led_dat->gpio))
233 + gpio_direction_input(led_dat->gpio);
236 +static void input_trig_deactivate(struct led_classdev *led_cdev)
238 + struct gpio_led_data *led_dat =
239 + container_of(led_cdev, struct gpio_led_data, cdev);
240 + if (gpio_is_valid(led_dat->gpio))
241 + gpio_direction_output(led_dat->gpio, 0);
244 +static struct led_trigger input_led_trigger = {
246 + .activate = input_trig_activate,
247 + .deactivate = input_trig_deactivate,
250 +static int __init input_trig_init(void)
252 + return led_trigger_register(&input_led_trigger);
255 +static void __exit input_trig_exit(void)
257 + led_trigger_unregister(&input_led_trigger);
260 +module_init(input_trig_init);
261 +module_exit(input_trig_exit);
263 +MODULE_AUTHOR("Phil Elwell <phil@raspberrypi.org>");
264 +MODULE_DESCRIPTION("Set LED GPIO to Input \"trigger\"");
265 +MODULE_LICENSE("GPL");