+++ /dev/null
-From 6a42dd698ddf91b6e9902b17e21dc13c6ae412ff Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 16 Mar 2014 05:24:42 +0000
-Subject: [PATCH 56/57] 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
-@@ -1202,6 +1202,13 @@ 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
-@@ -139,6 +139,7 @@ obj-$(CONFIG_OCTEON_WDT) += octeon-wdt.o
- octeon-wdt-y := octeon-wdt-main.o octeon-wdt-nmi.o
- obj-$(CONFIG_LANTIQ_WDT) += lantiq_wdt.o
- obj-$(CONFIG_RALINK_WDT) += rt2880_wdt.o
-+obj-$(CONFIG_MT7621_WDT) += mt7621_wdt.o
-
- # PARISC Architecture
-
---- /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_request_and_ioremap(&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);
projects / openwrt / svn-archive / archive.git / blobdiff