summaryrefslogtreecommitdiff
path: root/target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c
diff options
context:
space:
mode:
authorLudovic Pouzenc <ludovic@pouzenc.fr>2018-09-14 22:25:09 +0200
committerLudovic Pouzenc <ludovic@pouzenc.fr>2018-09-14 22:25:09 +0200
commit3362d9fb3a94d0909b79c290abc8db6abe4cca21 (patch)
tree35f9e4dfaeb691fe09fcd95b45dc440f0338a1b5 /target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c
parent51e1f1476f74d6788b106a066dfebd8ec6ac1bd9 (diff)
downloadmtk-20170518-3362d9fb3a94d0909b79c290abc8db6abe4cca21.zip
mtk-20170518-3362d9fb3a94d0909b79c290abc8db6abe4cca21.tar.gz
mtk-20170518-3362d9fb3a94d0909b79c290abc8db6abe4cca21.tar.bz2
target/linux : drop many arch
Diffstat (limited to 'target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c')
-rw-r--r--target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c207
1 files changed, 0 insertions, 207 deletions
diff --git a/target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c b/target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c
deleted file mode 100644
index ca69e8f..0000000
--- a/target/linux/mcs814x/files-3.3/drivers/watchdog/mcs814x_wdt.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Moschip MCS814x Watchdog driver
- *
- * Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
- *
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/io.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/of.h>
-
-#define WDT_COUNT 0x00
-#define WDT_CTRL 0x04
-#define WDT_CTRL_EN 0x1
-
-/* watchdog frequency */
-#define WDT_MAX_VALUE (0xffffffff)
-
-struct mcs814x_wdt {
- void __iomem *regs;
- spinlock_t lock;
- struct watchdog_device wdt_dev;
- struct clk *clk;
-};
-
-static int mcs814x_wdt_start(struct watchdog_device *dev)
-{
- struct mcs814x_wdt *wdt = watchdog_get_drvdata(dev);
- u32 reg;
-
- spin_lock(&wdt->lock);
- reg = readl_relaxed(wdt->regs + WDT_CTRL);
- reg |= WDT_CTRL_EN;
- writel_relaxed(reg, wdt->regs + WDT_CTRL);
- spin_unlock(&wdt->lock);
-
- return 0;
-}
-
-static int mcs814x_wdt_stop(struct watchdog_device *dev)
-{
- struct mcs814x_wdt *wdt = watchdog_get_drvdata(dev);
- u32 reg;
-
- spin_lock(&wdt->lock);
- reg = readl_relaxed(wdt->regs + WDT_CTRL);
- reg &= ~WDT_CTRL_EN;
- writel_relaxed(reg, wdt->regs + WDT_CTRL);
- spin_unlock(&wdt->lock);
-
- return 0;
-}
-
-static int mcs814x_wdt_set_timeout(struct watchdog_device *dev,
- unsigned int new_timeout)
-{
- struct mcs814x_wdt *wdt = watchdog_get_drvdata(dev);
-
- spin_lock(&wdt->lock);
- /* watchdog counts upward and rollover (0xfffffff -> 0)
- * triggers the reboot
- */
- writel_relaxed(WDT_MAX_VALUE - (new_timeout * clk_get_rate(wdt->clk)),
- wdt->regs + WDT_COUNT);
- spin_unlock(&wdt->lock);
-
- return 0;
-}
-
-static int mcs814x_wdt_ping(struct watchdog_device *dev)
-{
- /* restart the watchdog */
- mcs814x_wdt_stop(dev);
- mcs814x_wdt_set_timeout(dev, dev->timeout);
- mcs814x_wdt_start(dev);
-
- return 0;
-}
-
-static const struct watchdog_info mcs814x_wdt_ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
- .identity = "MCS814x Watchdog",
-};
-
-static struct watchdog_ops mcs814x_wdt_ops = {
- .owner = THIS_MODULE,
- .start = mcs814x_wdt_start,
- .stop = mcs814x_wdt_stop,
- .set_timeout = mcs814x_wdt_set_timeout,
- .ping = mcs814x_wdt_ping,
-};
-
-static int __devinit mcs814x_wdt_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct mcs814x_wdt *wdt;
- int ret;
- struct clk *clk;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- clk = clk_get(NULL, "wdt");
- if (IS_ERR_OR_NULL(clk)) {
- dev_err(&pdev->dev, "failed to get watchdog clock\n");
- return PTR_ERR(clk);
- }
-
- wdt = kzalloc(sizeof(*wdt), GFP_KERNEL);
- if (!wdt) {
- ret = -ENOMEM;
- goto out_clk;
- }
-
- spin_lock_init(&wdt->lock);
- wdt->clk = clk;
- wdt->wdt_dev.info = &mcs814x_wdt_ident;
- wdt->wdt_dev.ops = &mcs814x_wdt_ops;
- wdt->wdt_dev.min_timeout = 1;
- /* approximately 10995 secs */
- wdt->wdt_dev.max_timeout = (WDT_MAX_VALUE / clk_get_rate(clk));
-
- platform_set_drvdata(pdev, wdt);
-
- /* only ioremap registers, because the register is shared */
- wdt->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
- if (!wdt->regs) {
- ret = -ENOMEM;
- goto out;
- }
-
- watchdog_set_drvdata(&wdt->wdt_dev, wdt);
-
- ret = watchdog_register_device(&wdt->wdt_dev);
- if (ret) {
- dev_err(&pdev->dev, "cannot register watchdog: %d\n", ret);
- goto out;
- }
-
- dev_info(&pdev->dev, "registered\n");
- return 0;
-
-out:
- platform_set_drvdata(pdev, NULL);
- kfree(wdt);
-out_clk:
- clk_put(clk);
- return ret;
-}
-
-static int __devexit mcs814x_wdt_remove(struct platform_device *pdev)
-{
- struct mcs814x_wdt *wdt = platform_get_drvdata(pdev);
-
- clk_put(wdt->clk);
- watchdog_unregister_device(&wdt->wdt_dev);
- watchdog_set_drvdata(&wdt->wdt_dev, NULL);
- kfree(wdt);
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id mcs814x_wdt_ids[] = {
- { .compatible = "moschip,mcs814x-wdt", },
- { /* sentinel */ },
-};
-
-static struct platform_driver mcs814x_wdt_driver = {
- .driver = {
- .name = "mcs814x-wdt",
- .owner = THIS_MODULE,
- .of_match_table = mcs814x_wdt_ids,
- },
- .probe = mcs814x_wdt_probe,
- .remove = __devexit_p(mcs814x_wdt_remove),
-};
-
-module_platform_driver(mcs814x_wdt_driver);
-
-MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
-MODULE_DESCRIPTION("Moschip MCS814x Watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS("platform:mcs814x-wdt");