[ixp4xx] move the latch-led driver into a separated patch

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11252 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 198 insertions, 0 deletions

diff --git a/target/linux/ixp4xx/patches-2.6.25/295-latch_led_driver.patch b/target/linux/ixp4xx/patches-2.6.25/295-latch_led_driver.patch
new file mode 100644
index 0000000000..7733abc596
--- /dev/null
+++ b/target/linux/ixp4xx/patches-2.6.25/295-latch_led_driver.patch
@@ -0,0 +1,198 @@
+Index: linux-2.6.25.4/drivers/leds/Kconfig
+===================================================================
+--- linux-2.6.25.4.orig/drivers/leds/Kconfig
++++ linux-2.6.25.4/drivers/leds/Kconfig
+@@ -125,6 +125,12 @@ config LEDS_GPIO
+ 	  outputs. To be useful the particular board must have LEDs
+ 	  and they must be connected to the GPIO lines.
+ 
++config LEDS_LATCH
++	tristate "LED Support for Memory Latched LEDs"
++	depends on LEDS_CLASS
++	help
++		-- To Do --
++
+ config LEDS_CM_X270
+ 	tristate "LED Support for the CM-X270 LEDs"
+ 	depends on LEDS_CLASS && MACH_ARMCORE
+Index: linux-2.6.25.4/drivers/leds/leds-latch.c
+===================================================================
+--- /dev/null
++++ linux-2.6.25.4/drivers/leds/leds-latch.c
+@@ -0,0 +1,141 @@
++/*
++ * 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/init.h>
++#include <linux/platform_device.h>
++#include <linux/leds.h>
++#include <linux/workqueue.h>
++#include <asm/io.h>
++#include <linux/spinlock.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;
++};
++
++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);
++
++	spin_lock(mem_lock);
++
++	if (value == LED_OFF)
++		mem_keep |= (0x1 << led_dat->bit);
++	else
++		mem_keep &= ~(0x1 << led_dat->bit);
++
++	writeb(mem_keep, iobase);
++
++	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;
++
++	iobase = ioremap_nocache(pdata->mem, 0x1000);
++	writeb(0xFF, iobase);
++
++	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;
++
++		ret = led_classdev_register(&pdev->dev, &led_dat->cdev);
++		if (ret < 0) {
++			goto err;
++		}
++	}
++
++	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 __devexit 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		= __devexit_p(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");
++MODULE_LICENSE("GPL");
+Index: linux-2.6.25.4/drivers/leds/Makefile
+===================================================================
+--- linux-2.6.25.4.orig/drivers/leds/Makefile
++++ linux-2.6.25.4/drivers/leds/Makefile
+@@ -19,6 +19,7 @@ obj-$(CONFIG_LEDS_H1940)		+= leds-h1940.
+ obj-$(CONFIG_LEDS_COBALT_QUBE)		+= leds-cobalt-qube.o
+ obj-$(CONFIG_LEDS_COBALT_RAQ)		+= leds-cobalt-raq.o
+ obj-$(CONFIG_LEDS_GPIO)			+= leds-gpio.o
++obj-$(CONFIG_LEDS_LATCH)     += leds-latch.o
+ obj-$(CONFIG_LEDS_CM_X270)              += leds-cm-x270.o
+ obj-$(CONFIG_LEDS_CLEVO_MAIL)		+= leds-clevo-mail.o
+ obj-$(CONFIG_LEDS_HP6XX)		+= leds-hp6xx.o
+Index: linux-2.6.25.4/include/linux/leds.h
+===================================================================
+--- linux-2.6.25.4.orig/include/linux/leds.h
++++ linux-2.6.25.4/include/linux/leds.h
+@@ -136,5 +136,18 @@ struct gpio_led_platform_data {
+ 	struct gpio_led *leds;
+ };
+ 
++/* 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;
++};
++
+ 
+ #endif		/* __LINUX_LEDS_H_INCLUDED */