ixp4xx: add 3.14 support

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43464 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 201 insertions, 0 deletions

diff --git a/target/linux/ixp4xx/patches-3.14/295-latch_led_driver.patch b/target/linux/ixp4xx/patches-3.14/295-latch_led_driver.patch
new file mode 100644
index 0000000000..0d5119d624
--- /dev/null
+++ b/target/linux/ixp4xx/patches-3.14/295-latch_led_driver.patch
@@ -0,0 +1,201 @@
+--- a/drivers/leds/Kconfig
++++ b/drivers/leds/Kconfig
+@@ -251,6 +251,12 @@ 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 */