ramips: add linux 4.4 support, update mt7621 subtarget to 4.4

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48951

1 files changed, 227 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-4.4/0049-watchdog-add-MT7621-support.patch b/target/linux/ramips/patches-4.4/0049-watchdog-add-MT7621-support.patch
new file mode 100644
index 0000000000..eba6d7a390
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0049-watchdog-add-MT7621-support.patch
@@ -0,0 +1,227 @@
+From 77fe64de72317c0e090d82056e7a6a073f2972b4 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 16 Mar 2014 05:24:42 +0000
+Subject: [PATCH 49/53] watchdog: add MT7621 support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/watchdog/Kconfig      |    7 ++
+ drivers/watchdog/Makefile     |    1 +
+ drivers/watchdog/mt7621_wdt.c |  185 +++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 193 insertions(+)
+ create mode 100644 drivers/watchdog/mt7621_wdt.c
+
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -1354,6 +1354,13 @@ config RALINK_WDT
+ 	help
+ 	  Hardware driver for the Ralink SoC Watchdog Timer.
+ 
++config MT7621_WDT
++	tristate "Mediatek SoC watchdog"
++	select WATCHDOG_CORE
++	depends on SOC_MT7620 || SOC_MT7621
++	help
++	  Hardware driver for the Ralink SoC Watchdog Timer.
++
+ # PARISC Architecture
+ 
+ # POWERPC Architecture
+--- a/drivers/watchdog/Makefile
++++ b/drivers/watchdog/Makefile
+@@ -69,6 +69,7 @@ obj-$(CONFIG_MEDIATEK_WATCHDOG) += mtk_w
+ obj-$(CONFIG_DIGICOLOR_WATCHDOG) += digicolor_wdt.o
+ obj-$(CONFIG_LPC18XX_WATCHDOG) += lpc18xx_wdt.o
+ obj-$(CONFIG_BCM7038_WDT) += bcm7038_wdt.o
++obj-$(CONFIG_MT7621_WDT) += mt7621_wdt.o
+ 
+ # AVR32 Architecture
+ obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
+--- /dev/null
++++ b/drivers/watchdog/mt7621_wdt.c
+@@ -0,0 +1,185 @@
++/*
++ * Ralink RT288x/RT3xxx/MT76xx built-in hardware watchdog timer
++ *
++ * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ *
++ * This driver was based on: drivers/watchdog/softdog.c
++ *
++ * 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/clk.h>
++#include <linux/reset.h>
++#include <linux/module.h>
++#include <linux/kernel.h>
++#include <linux/watchdog.h>
++#include <linux/miscdevice.h>
++#include <linux/moduleparam.h>
++#include <linux/platform_device.h>
++
++#include <asm/mach-ralink/ralink_regs.h>
++
++#define SYSC_RSTSTAT			0x38
++#define WDT_RST_CAUSE			BIT(1)
++
++#define RALINK_WDT_TIMEOUT		30
++
++#define TIMER_REG_TMRSTAT		0x00
++#define TIMER_REG_TMR1LOAD		0x24
++#define TIMER_REG_TMR1CTL		0x20
++
++#define TMR1CTL_ENABLE			BIT(7)
++#define TMR1CTL_RESTART			BIT(9)
++
++static void __iomem *mt762x_wdt_base;
++
++static bool nowayout = WATCHDOG_NOWAYOUT;
++module_param(nowayout, bool, 0);
++MODULE_PARM_DESC(nowayout,
++		"Watchdog cannot be stopped once started (default="
++		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
++
++static inline void rt_wdt_w32(unsigned reg, u32 val)
++{
++	iowrite32(val, mt762x_wdt_base + reg);
++}
++
++static inline u32 rt_wdt_r32(unsigned reg)
++{
++	return ioread32(mt762x_wdt_base + reg);
++}
++
++static int mt762x_wdt_ping(struct watchdog_device *w)
++{
++	rt_wdt_w32(TIMER_REG_TMRSTAT, TMR1CTL_RESTART);
++
++	return 0;
++}
++
++static int mt762x_wdt_set_timeout(struct watchdog_device *w, unsigned int t)
++{
++	w->timeout = t;
++	rt_wdt_w32(TIMER_REG_TMR1LOAD, t * 1000);
++	mt762x_wdt_ping(w);
++
++	return 0;
++}
++
++static int mt762x_wdt_start(struct watchdog_device *w)
++{
++	u32 t;
++
++	rt_wdt_w32(TIMER_REG_TMR1CTL, 1000 << 16);
++	mt762x_wdt_set_timeout(w, w->timeout);
++
++	t = rt_wdt_r32(TIMER_REG_TMR1CTL);
++	t |= TMR1CTL_ENABLE;
++	rt_wdt_w32(TIMER_REG_TMR1CTL, t);
++
++	return 0;
++}
++
++static int mt762x_wdt_stop(struct watchdog_device *w)
++{
++	u32 t;
++
++	mt762x_wdt_ping(w);
++
++	t = rt_wdt_r32(TIMER_REG_TMR1CTL);
++	t &= ~TMR1CTL_ENABLE;
++	rt_wdt_w32(TIMER_REG_TMR1CTL, t);
++
++	return 0;
++}
++
++static int mt762x_wdt_bootcause(void)
++{
++	if (rt_sysc_r32(SYSC_RSTSTAT) & WDT_RST_CAUSE)
++		return WDIOF_CARDRESET;
++
++	return 0;
++}
++
++static struct watchdog_info mt762x_wdt_info = {
++	.identity = "Mediatek Watchdog",
++	.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
++};
++
++static struct watchdog_ops mt762x_wdt_ops = {
++	.owner = THIS_MODULE,
++	.start = mt762x_wdt_start,
++	.stop = mt762x_wdt_stop,
++	.ping = mt762x_wdt_ping,
++	.set_timeout = mt762x_wdt_set_timeout,
++};
++
++static struct watchdog_device mt762x_wdt_dev = {
++	.info = &mt762x_wdt_info,
++	.ops = &mt762x_wdt_ops,
++	.min_timeout = 1,
++};
++
++static int mt762x_wdt_probe(struct platform_device *pdev)
++{
++	struct resource *res;
++	int ret;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	mt762x_wdt_base = devm_ioremap_resource(&pdev->dev, res);
++	if (IS_ERR(mt762x_wdt_base))
++		return PTR_ERR(mt762x_wdt_base);
++
++	device_reset(&pdev->dev);
++
++	mt762x_wdt_dev.dev = &pdev->dev;
++	mt762x_wdt_dev.bootstatus = mt762x_wdt_bootcause();
++	mt762x_wdt_dev.max_timeout = (0xfffful / 1000);
++	mt762x_wdt_dev.timeout = mt762x_wdt_dev.max_timeout;
++
++	watchdog_set_nowayout(&mt762x_wdt_dev, nowayout);
++
++	ret = watchdog_register_device(&mt762x_wdt_dev);
++	if (!ret)
++		dev_info(&pdev->dev, "Initialized\n");
++
++	return 0;
++}
++
++static int mt762x_wdt_remove(struct platform_device *pdev)
++{
++	watchdog_unregister_device(&mt762x_wdt_dev);
++
++	return 0;
++}
++
++static void mt762x_wdt_shutdown(struct platform_device *pdev)
++{
++	mt762x_wdt_stop(&mt762x_wdt_dev);
++}
++
++static const struct of_device_id mt762x_wdt_match[] = {
++	{ .compatible = "mtk,mt7621-wdt" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, mt762x_wdt_match);
++
++static struct platform_driver mt762x_wdt_driver = {
++	.probe		= mt762x_wdt_probe,
++	.remove		= mt762x_wdt_remove,
++	.shutdown	= mt762x_wdt_shutdown,
++	.driver		= {
++		.name		= KBUILD_MODNAME,
++		.owner		= THIS_MODULE,
++		.of_match_table	= mt762x_wdt_match,
++	},
++};
++
++module_platform_driver(mt762x_wdt_driver);
++
++MODULE_DESCRIPTION("MediaTek MT762x hardware watchdog driver");
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org");
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);