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SubjectRe: [PATCH v2] Add watchdog driver for w90p910
Dear Wim,

Wim Van Sebroeck:
> Hi Wan,
>
>> At the same time, I renamed this driver name, due to I
>> have changed the corresponding device name in my arch file.
>
> Isn't it best to rename the driver in drivers/watchdog also to nuc900_wdt.c ?

The attached file is my fix patch relative to w90p910-v2.diff.
Also, I renamed all w90p910 to nuc900, Due to it applies to all
Nuc9xx series SoCs.

Thanks a lot for your help.

> Thanks,
> Wim.
>
>

fix watchdog driver for w90p910 platform.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>

---
drivers/watchdog/Kconfig | 8 +-
drivers/watchdog/Makefile | 2 +-
drivers/watchdog/nuc900_wdt.c | 353 ++++++++++++++++++++++++++++++++++++++++
drivers/watchdog/w90p910_wdt.c | 353 ----------------------------------------
4 files changed, 358 insertions(+), 358 deletions(-)
create mode 100644 drivers/watchdog/nuc900_wdt.c
delete mode 100644 drivers/watchdog/w90p910_wdt.c
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index fba4b91..352b658 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -266,14 +266,14 @@ config STMP3XXX_WATCHDOG
To compile this driver as a module, choose M here: the
module will be called stmp3xxx_wdt.

-config W90P910_WATCHDOG
- tristate "Nuvoton W90P910 watchdog"
+config NUC900_WATCHDOG
+ tristate "Nuvoton NUC900 watchdog"
depends on ARCH_W90X900
help
Say Y here if to include support for the watchdog timer
- for the Nuvoton W90P910 SoC.
+ for the Nuvoton NUC900 series SoCs.
To compile this driver as a module, choose M here: the
- module will be called w90p910_wdt.
+ module will be called nuc900_wdt.

# AVR32 Architecture

diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index ecc05b4..ecad9fa 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -44,7 +44,7 @@ obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
obj-$(CONFIG_ORION_WATCHDOG) += orion_wdt.o
obj-$(CONFIG_COH901327_WATCHDOG) += coh901327_wdt.o
obj-$(CONFIG_STMP3XXX_WATCHDOG) += stmp3xxx_wdt.o
-obj-$(CONFIG_W90P910_WATCHDOG) += w90p910_wdt.o
+obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o

# AVR32 Architecture
obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
diff --git a/drivers/watchdog/nuc900_wdt.c b/drivers/watchdog/nuc900_wdt.c
new file mode 100644
index 0000000..adefe3a
--- /dev/null
+++ b/drivers/watchdog/nuc900_wdt.c
@@ -0,0 +1,353 @@
+/*
+ * Copyright (c) 2009 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <linux/uaccess.h>
+
+#define REG_WTCR 0x1c
+#define WTCLK (0x01 << 10)
+#define WTE (0x01 << 7) /*wdt enable*/
+#define WTIS (0x03 << 4)
+#define WTIF (0x01 << 3)
+#define WTRF (0x01 << 2)
+#define WTRE (0x01 << 1)
+#define WTR (0x01 << 0)
+/*
+ * The watchdog time interval can be calculated via following formula:
+ * WTIS real time interval (formula)
+ * 0x00 ((2^ 14 ) * ((external crystal freq) / 256))seconds
+ * 0x01 ((2^ 16 ) * ((external crystal freq) / 256))seconds
+ * 0x02 ((2^ 18 ) * ((external crystal freq) / 256))seconds
+ * 0x03 ((2^ 20 ) * ((external crystal freq) / 256))seconds
+ *
+ * The external crystal freq is 15Mhz in the nuc900 evaluation board.
+ * So 0x00 = +-0.28 seconds, 0x01 = +-1.12 seconds, 0x02 = +-4.48 seconds,
+ * 0x03 = +- 16.92 seconds..
+ */
+#define WDT_HW_TIMEOUT 0x02
+#define WDT_TIMEOUT (HZ/2)
+#define WDT_HEARTBEAT 15
+
+static int heartbeat = WDT_HEARTBEAT;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
+ "(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
+ "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+struct nuc900_wdt {
+ struct resource *res;
+ struct clk *wdt_clock;
+ struct platform_device *pdev;
+ void __iomem *wdt_base;
+ char expect_close;
+ struct timer_list timer;
+ spinlock_t wdt_lock;
+ unsigned long next_heartbeat;
+};
+
+static unsigned long nuc900wdt_busy;
+struct nuc900_wdt *nuc900_wdt;
+
+static inline void nuc900_wdt_keepalive(void)
+{
+ unsigned int val;
+
+ spin_lock(&nuc900_wdt->wdt_lock);
+
+ val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
+ val |= (WTR | WTIF);
+ __raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
+
+ spin_unlock(&nuc900_wdt->wdt_lock);
+}
+
+static inline void nuc900_wdt_start(void)
+{
+ unsigned int val;
+
+ spin_lock(&nuc900_wdt->wdt_lock);
+
+ val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
+ val |= (WTRE | WTE | WTR | WTCLK | WTIF);
+ val &= ~WTIS;
+ val |= (WDT_HW_TIMEOUT << 0x04);
+ __raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
+
+ spin_unlock(&nuc900_wdt->wdt_lock);
+
+ nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
+ mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
+}
+
+static inline void nuc900_wdt_stop(void)
+{
+ unsigned int val;
+
+ del_timer(&nuc900_wdt->timer);
+
+ spin_lock(&nuc900_wdt->wdt_lock);
+
+ val = __raw_readl(nuc900_wdt->wdt_base + REG_WTCR);
+ val &= ~WTE;
+ __raw_writel(val, nuc900_wdt->wdt_base + REG_WTCR);
+
+ spin_unlock(&nuc900_wdt->wdt_lock);
+}
+
+static inline void nuc900_wdt_ping(void)
+{
+ nuc900_wdt->next_heartbeat = jiffies + heartbeat * HZ;
+}
+
+static int nuc900_wdt_open(struct inode *inode, struct file *file)
+{
+
+ if (test_and_set_bit(0, &nuc900wdt_busy))
+ return -EBUSY;
+
+ nuc900_wdt_start();
+
+ return nonseekable_open(inode, file);
+}
+
+static int nuc900_wdt_close(struct inode *inode, struct file *file)
+{
+ if (nuc900_wdt->expect_close == 42)
+ nuc900_wdt_stop();
+ else {
+ dev_crit(&nuc900_wdt->pdev->dev,
+ "Unexpected close, not stopping watchdog!\n");
+ nuc900_wdt_ping();
+ }
+
+ nuc900_wdt->expect_close = 0;
+ clear_bit(0, &nuc900wdt_busy);
+ return 0;
+}
+
+static const struct watchdog_info nuc900_wdt_info = {
+ .identity = "nuc900 watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+};
+
+static long nuc900_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_value;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &nuc900_wdt_info,
+ sizeof(nuc900_wdt_info)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ nuc900_wdt_ping();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ heartbeat = new_value;
+ nuc900_wdt_ping();
+
+ return put_user(new_value, p);
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ default:
+ return -ENOTTY;
+ }
+}
+
+static ssize_t nuc900_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ if (!len)
+ return 0;
+
+ /* Scan for magic character */
+ if (!nowayout) {
+ size_t i;
+
+ nuc900_wdt->expect_close = 0;
+
+ for (i = 0; i < len; i++) {
+ char c;
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V') {
+ nuc900_wdt->expect_close = 42;
+ break;
+ }
+ }
+ }
+
+ nuc900_wdt_ping();
+ return len;
+}
+
+static void nuc900_wdt_timer_ping(unsigned long data)
+{
+ if (time_before(jiffies, nuc900_wdt->next_heartbeat)) {
+ nuc900_wdt_keepalive();
+ mod_timer(&nuc900_wdt->timer, jiffies + WDT_TIMEOUT);
+ } else
+ dev_warn(&nuc900_wdt->pdev->dev, "Will reset the machine !\n");
+}
+
+static const struct file_operations nuc900wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .unlocked_ioctl = nuc900_wdt_ioctl,
+ .open = nuc900_wdt_open,
+ .release = nuc900_wdt_close,
+ .write = nuc900_wdt_write,
+};
+
+static struct miscdevice nuc900wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &nuc900wdt_fops,
+};
+
+static int __devinit nuc900wdt_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ nuc900_wdt = kzalloc(sizeof(struct nuc900_wdt), GFP_KERNEL);
+ if (!nuc900_wdt)
+ return -ENOMEM;
+
+ nuc900_wdt->pdev = pdev;
+
+ spin_lock_init(&nuc900_wdt->wdt_lock);
+
+ nuc900_wdt->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (nuc900_wdt->res == NULL) {
+ dev_err(&pdev->dev, "no memory resource specified\n");
+ ret = -ENOENT;
+ goto err_get;
+ }
+
+ if (!request_mem_region(nuc900_wdt->res->start,
+ resource_size(nuc900_wdt->res), pdev->name)) {
+ dev_err(&pdev->dev, "failed to get memory region\n");
+ ret = -ENOENT;
+ goto err_get;
+ }
+
+ nuc900_wdt->wdt_base = ioremap(nuc900_wdt->res->start,
+ resource_size(nuc900_wdt->res));
+ if (nuc900_wdt->wdt_base == NULL) {
+ dev_err(&pdev->dev, "failed to ioremap() region\n");
+ ret = -EINVAL;
+ goto err_req;
+ }
+
+ nuc900_wdt->wdt_clock = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(nuc900_wdt->wdt_clock)) {
+ dev_err(&pdev->dev, "failed to find watchdog clock source\n");
+ ret = PTR_ERR(nuc900_wdt->wdt_clock);
+ goto err_map;
+ }
+
+ clk_enable(nuc900_wdt->wdt_clock);
+
+ setup_timer(&nuc900_wdt->timer, nuc900_wdt_timer_ping, 0);
+
+ if (misc_register(&nuc900wdt_miscdev)) {
+ dev_err(&pdev->dev, "err register miscdev on minor=%d (%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_clk;
+ }
+
+ return 0;
+
+err_clk:
+ clk_disable(nuc900_wdt->wdt_clock);
+ clk_put(nuc900_wdt->wdt_clock);
+err_map:
+ iounmap(nuc900_wdt->wdt_base);
+err_req:
+ release_mem_region(nuc900_wdt->res->start,
+ resource_size(nuc900_wdt->res));
+err_get:
+ kfree(nuc900_wdt);
+ return ret;
+}
+
+static int __devexit nuc900wdt_remove(struct platform_device *pdev)
+{
+ misc_deregister(&nuc900wdt_miscdev);
+
+ clk_disable(nuc900_wdt->wdt_clock);
+ clk_put(nuc900_wdt->wdt_clock);
+
+ iounmap(nuc900_wdt->wdt_base);
+
+ release_mem_region(nuc900_wdt->res->start,
+ resource_size(nuc900_wdt->res));
+
+ kfree(nuc900_wdt);
+
+ return 0;
+}
+
+static struct platform_driver nuc900wdt_driver = {
+ .probe = nuc900wdt_probe,
+ .remove = __devexit_p(nuc900wdt_remove),
+ .driver = {
+ .name = "nuc900-wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init nuc900_wdt_init(void)
+{
+ return platform_driver_register(&nuc900wdt_driver);
+}
+
+static void __exit nuc900_wdt_exit(void)
+{
+ platform_driver_unregister(&nuc900wdt_driver);
+}
+
+module_init(nuc900_wdt_init);
+module_exit(nuc900_wdt_exit);
+
+MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
+MODULE_DESCRIPTION("Watchdog driver for NUC900");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS("platform:nuc900-wdt");
diff --git a/drivers/watchdog/w90p910_wdt.c b/drivers/watchdog/w90p910_wdt.c
deleted file mode 100644
index 3cb8972..0000000
--- a/drivers/watchdog/w90p910_wdt.c
+++ /dev/null
@@ -1,353 +0,0 @@
-/*
- * Copyright (c) 2009 Nuvoton technology corporation.
- *
- * Wan ZongShun <mcuos.com@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation;version 2 of the License.
- *
- */
-
-#include <linux/bitops.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <linux/uaccess.h>
-
-#define REG_WTCR 0x1c
-#define WTCLK (0x01 << 10)
-#define WTE (0x01 << 7) /*wdt enable*/
-#define WTIS (0x03 << 4)
-#define WTIF (0x01 << 3)
-#define WTRF (0x01 << 2)
-#define WTRE (0x01 << 1)
-#define WTR (0x01 << 0)
-/*
- * The watchdog time interval can be calculated via following formula:
- * WTIS real time interval (formula)
- * 0x00 ((2^ 14 ) * ((external crystal freq) / 256))seconds
- * 0x01 ((2^ 16 ) * ((external crystal freq) / 256))seconds
- * 0x02 ((2^ 18 ) * ((external crystal freq) / 256))seconds
- * 0x03 ((2^ 20 ) * ((external crystal freq) / 256))seconds
- *
- * The external crystal freq is 15Mhz in the w90p910 evaluation board.
- * So 0x00 = +-0.28 seconds, 0x01 = +-1.12 seconds, 0x02 = +-4.48 seconds,
- * 0x03 = +- 16.92 seconds..
- */
-#define WDT_HW_TIMEOUT 0x02
-#define WDT_TIMEOUT (HZ/2)
-#define WDT_HEARTBEAT 15
-
-static int heartbeat = WDT_HEARTBEAT;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
- "(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
- "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-struct w90p910_wdt {
- struct resource *res;
- struct clk *wdt_clock;
- struct platform_device *pdev;
- void __iomem *wdt_base;
- char expect_close;
- struct timer_list timer;
- spinlock_t wdt_lock;
- unsigned long next_heartbeat;
-};
-
-static unsigned long w90p910wdt_busy;
-struct w90p910_wdt *w90p910_wdt;
-
-static inline void w90p910_wdt_keepalive(void)
-{
- unsigned int val;
-
- spin_lock(&w90p910_wdt->wdt_lock);
-
- val = __raw_readl(w90p910_wdt->wdt_base + REG_WTCR);
- val |= (WTR | WTIF);
- __raw_writel(val, w90p910_wdt->wdt_base + REG_WTCR);
-
- spin_unlock(&w90p910_wdt->wdt_lock);
-}
-
-static inline void w90p910_wdt_start(void)
-{
- unsigned int val;
-
- spin_lock(&w90p910_wdt->wdt_lock);
-
- val = __raw_readl(w90p910_wdt->wdt_base + REG_WTCR);
- val |= (WTRE | WTE | WTR | WTCLK | WTIF);
- val &= ~WTIS;
- val |= (WDT_HW_TIMEOUT << 0x04);
- __raw_writel(val, w90p910_wdt->wdt_base + REG_WTCR);
-
- spin_unlock(&w90p910_wdt->wdt_lock);
-
- w90p910_wdt->next_heartbeat = jiffies + heartbeat * HZ;
- mod_timer(&w90p910_wdt->timer, jiffies + WDT_TIMEOUT);
-}
-
-static inline void w90p910_wdt_stop(void)
-{
- unsigned int val;
-
- del_timer(&w90p910_wdt->timer);
-
- spin_lock(&w90p910_wdt->wdt_lock);
-
- val = __raw_readl(w90p910_wdt->wdt_base + REG_WTCR);
- val &= ~WTE;
- __raw_writel(val, w90p910_wdt->wdt_base + REG_WTCR);
-
- spin_unlock(&w90p910_wdt->wdt_lock);
-}
-
-static inline void w90p910_wdt_ping(void)
-{
- w90p910_wdt->next_heartbeat = jiffies + heartbeat * HZ;
-}
-
-static int w90p910_wdt_open(struct inode *inode, struct file *file)
-{
-
- if (test_and_set_bit(0, &w90p910wdt_busy))
- return -EBUSY;
-
- w90p910_wdt_start();
-
- return nonseekable_open(inode, file);
-}
-
-static int w90p910_wdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42)
- w90p910_wdt_stop();
- else {
- dev_crit(&w90p910_wdt->pdev->dev,
- "Unexpected close, not stopping watchdog!\n");
- w90p910_wdt_ping();
- }
-
- w90p910_wdt->expect_close = 0;
- clear_bit(0, &w90p910wdt_busy);
- return 0;
-}
-
-static const struct watchdog_info w90p910_wdt_info = {
- .identity = "w90p910 watchdog",
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
-};
-
-static long w90p910_wdt_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_value;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &w90p910_wdt_info,
- sizeof(w90p910_wdt_info)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- w90p910_wdt_ping();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- heartbeat = new_value;
- w90p910_wdt_ping();
-
- return put_user(new_value, p);
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
- default:
- return -ENOTTY;
- }
-}
-
-static ssize_t w90p910_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- if (!len)
- return 0;
-
- /* Scan for magic character */
- if (!nowayout) {
- size_t i;
-
- w90p910_wdt->expect_close = 0;
-
- for (i = 0; i < len; i++) {
- char c;
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V') {
- w90p910_wdt->expect_close = 42;
- break;
- }
- }
- }
-
- w90p910_wdt_ping();
- return len;
-}
-
-static void w90p910_wdt_timer_ping(unsigned long data)
-{
- if (time_before(jiffies, w90p910_wdt->next_heartbeat)) {
- w90p910_wdt_keepalive();
- mod_timer(&w90p910_wdt->timer, jiffies + WDT_TIMEOUT);
- } else
- dev_warn(&w90p910_wdt->pdev->dev, "Will reset the machine !\n");
-}
-
-static const struct file_operations w90p910wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .unlocked_ioctl = w90p910_wdt_ioctl,
- .open = w90p910_wdt_open,
- .release = w90p910_wdt_close,
- .write = w90p910_wdt_write,
-};
-
-static struct miscdevice w90p910wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &w90p910wdt_fops,
-};
-
-static int __devinit w90p910wdt_probe(struct platform_device *pdev)
-{
- int ret = 0;
-
- w90p910_wdt = kzalloc(sizeof(struct w90p910_wdt), GFP_KERNEL);
- if (!w90p910_wdt)
- return -ENOMEM;
-
- w90p910_wdt->pdev = pdev;
-
- spin_lock_init(&w90p910_wdt->wdt_lock);
-
- w90p910_wdt->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (w90p910_wdt->res == NULL) {
- dev_err(&pdev->dev, "no memory resource specified\n");
- ret = -ENOENT;
- goto err_get;
- }
-
- if (!request_mem_region(w90p910_wdt->res->start,
- resource_size(w90p910_wdt->res), pdev->name)) {
- dev_err(&pdev->dev, "failed to get memory region\n");
- ret = -ENOENT;
- goto err_get;
- }
-
- w90p910_wdt->wdt_base = ioremap(w90p910_wdt->res->start,
- resource_size(w90p910_wdt->res));
- if (w90p910_wdt->wdt_base == NULL) {
- dev_err(&pdev->dev, "failed to ioremap() region\n");
- ret = -EINVAL;
- goto err_req;
- }
-
- w90p910_wdt->wdt_clock = clk_get(&pdev->dev, NULL);
- if (IS_ERR(w90p910_wdt->wdt_clock)) {
- dev_err(&pdev->dev, "failed to find watchdog clock source\n");
- ret = PTR_ERR(w90p910_wdt->wdt_clock);
- goto err_map;
- }
-
- clk_enable(w90p910_wdt->wdt_clock);
-
- setup_timer(&w90p910_wdt->timer, w90p910_wdt_timer_ping, 0);
-
- if (misc_register(&w90p910wdt_miscdev)) {
- dev_err(&pdev->dev, "err register miscdev on minor=%d (%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_clk;
- }
-
- return 0;
-
-err_clk:
- clk_disable(w90p910_wdt->wdt_clock);
- clk_put(w90p910_wdt->wdt_clock);
-err_map:
- iounmap(w90p910_wdt->wdt_base);
-err_req:
- release_mem_region(w90p910_wdt->res->start,
- resource_size(w90p910_wdt->res));
-err_get:
- kfree(w90p910_wdt);
- return ret;
-}
-
-static int __devexit w90p910wdt_remove(struct platform_device *pdev)
-{
- misc_deregister(&w90p910wdt_miscdev);
-
- clk_disable(w90p910_wdt->wdt_clock);
- clk_put(w90p910_wdt->wdt_clock);
-
- iounmap(w90p910_wdt->wdt_base);
-
- release_mem_region(w90p910_wdt->res->start,
- resource_size(w90p910_wdt->res));
-
- kfree(w90p910_wdt);
-
- return 0;
-}
-
-static struct platform_driver w90p910wdt_driver = {
- .probe = w90p910wdt_probe,
- .remove = __devexit_p(w90p910wdt_remove),
- .driver = {
- .name = "w90p910-wdt",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init w90p910_wdt_init(void)
-{
- return platform_driver_register(&w90p910wdt_driver);
-}
-
-static void __exit w90p910_wdt_exit(void)
-{
- platform_driver_unregister(&w90p910wdt_driver);
-}
-
-module_init(w90p910_wdt_init);
-module_exit(w90p910_wdt_exit);
-
-MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
-MODULE_DESCRIPTION("Watchdog driver for W90P910");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS("platform:w90p910-wdt");
--
1.5.6.3
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  Last update: 2009-08-17 12:03    [from the cache]
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