diff options
Diffstat (limited to 'target/linux/ath79/patches-4.14/0003-leds-add-reset-controller-based-driver.patch')
| -rw-r--r-- | target/linux/ath79/patches-4.14/0003-leds-add-reset-controller-based-driver.patch | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/target/linux/ath79/patches-4.14/0003-leds-add-reset-controller-based-driver.patch b/target/linux/ath79/patches-4.14/0003-leds-add-reset-controller-based-driver.patch deleted file mode 100644 index 495d792..0000000 --- a/target/linux/ath79/patches-4.14/0003-leds-add-reset-controller-based-driver.patch +++ /dev/null @@ -1,183 +0,0 @@ -From ecbd9c87f073f097d9fe56390353e64e963e866a Mon Sep 17 00:00:00 2001 -From: John Crispin <john@phrozen.org> -Date: Tue, 6 Mar 2018 10:03:03 +0100 -Subject: [PATCH 03/27] leds: add reset-controller based driver - -Signed-off-by: John Crispin <john@phrozen.org> ---- - drivers/leds/Kconfig | 11 ++++ - drivers/leds/Makefile | 1 + - drivers/leds/leds-reset.c | 137 ++++++++++++++++++++++++++++++++++++++++++++++ - 3 files changed, 149 insertions(+) - create mode 100644 drivers/leds/leds-reset.c - ---- a/drivers/leds/Kconfig -+++ b/drivers/leds/Kconfig -@@ -696,6 +696,17 @@ config LEDS_NIC78BX - To compile this driver as a module, choose M here: the module - will be called leds-nic78bx. - -+config LEDS_RESET -+ tristate "LED support for reset-controller API" -+ depends on LEDS_CLASS -+ depends on RESET_CONTROLLER -+ help -+ This option enables support for LEDs connected to pins driven by reset -+ controllers. Yes, DNI actual built HW like that. -+ -+ To compile this driver as a module, choose M here: the module -+ will be called leds-reset. -+ - comment "LED Triggers" - source "drivers/leds/trigger/Kconfig" - ---- /dev/null -+++ b/drivers/leds/leds-reset.c -@@ -0,0 +1,137 @@ -+/* -+ * Copyright (C) 2018 John Crispin <john@phrozen.org> -+ * -+ * 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/err.h> -+#include <linux/reset.h> -+#include <linux/kernel.h> -+#include <linux/leds.h> -+#include <linux/module.h> -+#include <linux/of.h> -+#include <linux/platform_device.h> -+#include <linux/reset.h> -+ -+struct reset_led_data { -+ struct led_classdev cdev; -+ struct reset_control *rst; -+}; -+ -+static inline struct reset_led_data * -+ cdev_to_reset_led_data(struct led_classdev *led_cdev) -+{ -+ return container_of(led_cdev, struct reset_led_data, cdev); -+} -+ -+static void reset_led_set(struct led_classdev *led_cdev, -+ enum led_brightness value) -+{ -+ struct reset_led_data *led_dat = cdev_to_reset_led_data(led_cdev); -+ -+ if (value == LED_OFF) -+ reset_control_assert(led_dat->rst); -+ else -+ reset_control_deassert(led_dat->rst); -+} -+ -+struct reset_leds_priv { -+ int num_leds; -+ struct reset_led_data leds[]; -+}; -+ -+static inline int sizeof_reset_leds_priv(int num_leds) -+{ -+ return sizeof(struct reset_leds_priv) + -+ (sizeof(struct reset_led_data) * num_leds); -+} -+ -+static struct reset_leds_priv *reset_leds_create(struct platform_device *pdev) -+{ -+ struct device *dev = &pdev->dev; -+ struct fwnode_handle *child; -+ struct reset_leds_priv *priv; -+ int count, ret; -+ -+ count = device_get_child_node_count(dev); -+ if (!count) -+ return ERR_PTR(-ENODEV); -+ -+ priv = devm_kzalloc(dev, sizeof_reset_leds_priv(count), GFP_KERNEL); -+ if (!priv) -+ return ERR_PTR(-ENOMEM); -+ -+ device_for_each_child_node(dev, child) { -+ struct reset_led_data *led = &priv->leds[priv->num_leds]; -+ struct device_node *np = to_of_node(child); -+ -+ ret = fwnode_property_read_string(child, "label", &led->cdev.name); -+ if (!led->cdev.name) { -+ fwnode_handle_put(child); -+ return ERR_PTR(-EINVAL); -+ } -+ led->rst = __of_reset_control_get(np, NULL, 0, 0, 0); -+ if (IS_ERR(led->rst)) -+ return ERR_PTR(-EINVAL); -+ -+ led->cdev.brightness_set = reset_led_set; -+ ret = devm_of_led_classdev_register(&pdev->dev, np, &led->cdev); -+ if (ret < 0) -+ return ERR_PTR(ret); -+ led->cdev.dev->of_node = np; -+ priv->num_leds++; -+ } -+ -+ return priv; -+} -+ -+static const struct of_device_id of_reset_leds_match[] = { -+ { .compatible = "reset-leds", }, -+ {}, -+}; -+ -+MODULE_DEVICE_TABLE(of, of_reset_leds_match); -+ -+static int reset_led_probe(struct platform_device *pdev) -+{ -+ struct reset_leds_priv *priv; -+ -+ priv = reset_leds_create(pdev); -+ if (IS_ERR(priv)) -+ return PTR_ERR(priv); -+ -+ platform_set_drvdata(pdev, priv); -+ -+ return 0; -+} -+ -+static void reset_led_shutdown(struct platform_device *pdev) -+{ -+ struct reset_leds_priv *priv = platform_get_drvdata(pdev); -+ int i; -+ -+ for (i = 0; i < priv->num_leds; i++) { -+ struct reset_led_data *led = &priv->leds[i]; -+ -+ if (!(led->cdev.flags & LED_RETAIN_AT_SHUTDOWN)) -+ reset_led_set(&led->cdev, LED_OFF); -+ } -+} -+ -+static struct platform_driver reset_led_driver = { -+ .probe = reset_led_probe, -+ .shutdown = reset_led_shutdown, -+ .driver = { -+ .name = "leds-reset", -+ .of_match_table = of_reset_leds_match, -+ }, -+}; -+ -+module_platform_driver(reset_led_driver); -+ -+MODULE_AUTHOR("John Crispin <john@phrozen.org>"); -+MODULE_DESCRIPTION("reset controller LED driver"); -+MODULE_LICENSE("GPL"); -+MODULE_ALIAS("platform:leds-reset"); ---- a/drivers/leds/Makefile -+++ b/drivers/leds/Makefile -@@ -73,6 +73,7 @@ obj-$(CONFIG_LEDS_PM8058) += leds-pm805 - obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o - obj-$(CONFIG_LEDS_NIC78BX) += leds-nic78bx.o - obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o -+obj-$(CONFIG_LEDS_RESET) += leds-reset.o - - # LED SPI Drivers - obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o |