+++ /dev/null
---- a/drivers/leds/Kconfig
-+++ b/drivers/leds/Kconfig
-@@ -239,6 +239,12 @@ config LEDS_LP8788
- help
- This option enables support for the Keyboard LEDs on the LP8788 PMIC.
-
-+config LEDS_LATCH
-+ tristate "LED Support for Memory Latched LEDs"
-+ depends on LEDS_CLASS
-+ help
-+ -- To Do --
-+
- config LEDS_CLEVO_MAIL
- tristate "Mail LED on Clevo notebook"
- depends on LEDS_CLASS
---- a/drivers/leds/Makefile
-+++ b/drivers/leds/Makefile
-@@ -22,6 +22,7 @@ obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunf
- obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
- obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
- obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
-+obj-$(CONFIG_LEDS_LATCH) += leds-latch.o
- obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
- obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
- obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
---- /dev/null
-+++ b/drivers/leds/leds-latch.c
-@@ -0,0 +1,152 @@
-+/*
-+ * LEDs driver for Memory Latched Devices
-+ *
-+ * Copyright (C) 2008 Gateworks Corp.
-+ * Chris Lang <clang@gateworks.com>
-+ *
-+ * 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/kernel.h>
-+#include <linux/slab.h>
-+#include <linux/init.h>
-+#include <linux/platform_device.h>
-+#include <linux/leds.h>
-+#include <linux/workqueue.h>
-+#include <asm/io.h>
-+#include <linux/spinlock.h>
-+#include <linux/slab.h>
-+#include <linux/module.h>
-+#include <linux/export.h>
-+
-+static unsigned int mem_keep = 0xFF;
-+static spinlock_t mem_lock;
-+static unsigned char *iobase;
-+
-+struct latch_led_data {
-+ struct led_classdev cdev;
-+ struct work_struct work;
-+ u8 new_level;
-+ u8 bit;
-+ void (*set_led)(u8 bit, enum led_brightness value);
-+};
-+
-+static void latch_set_led(u8 bit, enum led_brightness value)
-+{
-+ if (value == LED_OFF)
-+ mem_keep |= (0x1 << bit);
-+ else
-+ mem_keep &= ~(0x1 << bit);
-+
-+ writeb(mem_keep, iobase);
-+}
-+
-+static void latch_led_set(struct led_classdev *led_cdev,
-+ enum led_brightness value)
-+{
-+ struct latch_led_data *led_dat =
-+ container_of(led_cdev, struct latch_led_data, cdev);
-+
-+ raw_spin_lock(mem_lock);
-+
-+ led_dat->set_led(led_dat->bit, value);
-+
-+ raw_spin_unlock(mem_lock);
-+}
-+
-+static int latch_led_probe(struct platform_device *pdev)
-+{
-+ struct latch_led_platform_data *pdata = pdev->dev.platform_data;
-+ struct latch_led *cur_led;
-+ struct latch_led_data *leds_data, *led_dat;
-+ int i, ret = 0;
-+
-+ if (!pdata)
-+ return -EBUSY;
-+
-+ leds_data = kzalloc(sizeof(struct latch_led_data) * pdata->num_leds,
-+ GFP_KERNEL);
-+ if (!leds_data)
-+ return -ENOMEM;
-+
-+ for (i = 0; i < pdata->num_leds; i++) {
-+ cur_led = &pdata->leds[i];
-+ led_dat = &leds_data[i];
-+
-+ led_dat->cdev.name = cur_led->name;
-+ led_dat->cdev.default_trigger = cur_led->default_trigger;
-+ led_dat->cdev.brightness_set = latch_led_set;
-+ led_dat->cdev.brightness = LED_OFF;
-+ led_dat->bit = cur_led->bit;
-+ led_dat->set_led = pdata->set_led ? pdata->set_led : latch_set_led;
-+
-+ ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
-+ if (ret < 0) {
-+ goto err;
-+ }
-+ }
-+
-+ if (!pdata->set_led) {
-+ iobase = ioremap_nocache(pdata->mem, 0x1000);
-+ writeb(0xFF, iobase);
-+ }
-+ platform_set_drvdata(pdev, leds_data);
-+
-+ return 0;
-+
-+err:
-+ if (i > 0) {
-+ for (i = i - 1; i >= 0; i--) {
-+ led_classdev_unregister(&leds_data[i].cdev);
-+ }
-+ }
-+
-+ kfree(leds_data);
-+
-+ return ret;
-+}
-+
-+static int latch_led_remove(struct platform_device *pdev)
-+{
-+ int i;
-+ struct latch_led_platform_data *pdata = pdev->dev.platform_data;
-+ struct latch_led_data *leds_data;
-+
-+ leds_data = platform_get_drvdata(pdev);
-+
-+ for (i = 0; i < pdata->num_leds; i++) {
-+ led_classdev_unregister(&leds_data[i].cdev);
-+ cancel_work_sync(&leds_data[i].work);
-+ }
-+
-+ kfree(leds_data);
-+
-+ return 0;
-+}
-+
-+static struct platform_driver latch_led_driver = {
-+ .probe = latch_led_probe,
-+ .remove = latch_led_remove,
-+ .driver = {
-+ .name = "leds-latch",
-+ .owner = THIS_MODULE,
-+ },
-+};
-+
-+static int __init latch_led_init(void)
-+{
-+ return platform_driver_register(&latch_led_driver);
-+}
-+
-+static void __exit latch_led_exit(void)
-+{
-+ platform_driver_unregister(&latch_led_driver);
-+}
-+
-+module_init(latch_led_init);
-+module_exit(latch_led_exit);
-+
-+MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
-+MODULE_DESCRIPTION("Latch LED driver");
---- a/include/linux/leds.h
-+++ b/include/linux/leds.h
-@@ -285,4 +285,18 @@ static inline void ledtrig_cpu(enum cpu_
- }
- #endif
-
-+/* For the leds-latch driver */
-+struct latch_led {
-+ const char *name;
-+ char *default_trigger;
-+ unsigned bit;
-+};
-+
-+struct latch_led_platform_data {
-+ int num_leds;
-+ u32 mem;
-+ struct latch_led *leds;
-+ void (*set_led)(u8 bit, enum led_brightness value);
-+};
-+
- #endif /* __LINUX_LEDS_H_INCLUDED */
projects / openwrt / svn-archive / archive.git / blobdiff