| Message ID | 20210120162745.61268-4-arnd@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | watchdog: remove obsolete drivers | expand |
On Wed, Jan 20, 2021 at 05:27:43PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@arndb.de> > > The zte zx platform is getting removed, so this driver is no > longer needed. > > Cc: Jun Nie <jun.nie@linaro.org> > Cc: Shawn Guo <shawnguo@kernel.org> > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > .../bindings/watchdog/zte,zx2967-wdt.txt | 32 -- > drivers/watchdog/Kconfig | 10 - > drivers/watchdog/Makefile | 1 - > drivers/watchdog/zx2967_wdt.c | 279 ------------------ > 4 files changed, 322 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt > delete mode 100644 drivers/watchdog/zx2967_wdt.c > > diff --git a/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt b/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt > deleted file mode 100644 > index 06ce67766756..000000000000 > --- a/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt > +++ /dev/null > @@ -1,32 +0,0 @@ > -ZTE zx2967 Watchdog timer > - > -Required properties: > - > -- compatible : should be one of the following. > - * zte,zx296718-wdt > -- reg : Specifies base physical address and size of the registers. > -- clocks : Pairs of phandle and specifier referencing the controller's clocks. > -- resets : Reference to the reset controller controlling the watchdog > - controller. > - > -Optional properties: > - > -- timeout-sec : Contains the watchdog timeout in seconds. > -- zte,wdt-reset-sysctrl : Directs how to reset system by the watchdog. > - if we don't want to restart system when watchdog been triggered, > - it's not required, vice versa. > - It should include following fields. > - * phandle of aon-sysctrl. > - * offset of register that be written, should be 0xb0. > - * configure value that be written to aon-sysctrl. > - * bit mask, corresponding bits will be affected. > - > -Example: > - > -wdt: watchdog@1465000 { > - compatible = "zte,zx296718-wdt"; > - reg = <0x1465000 0x1000>; > - clocks = <&topcrm WDT_WCLK>; > - resets = <&toprst 35>; > - zte,wdt-reset-sysctrl = <&aon_sysctrl 0xb0 1 0x115>; > -}; > diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig > index 5559e4325f6a..c36f8233f60b 100644 > --- a/drivers/watchdog/Kconfig > +++ b/drivers/watchdog/Kconfig > @@ -919,16 +919,6 @@ config ASPEED_WATCHDOG > To compile this driver as a module, choose M here: the > module will be called aspeed_wdt. > > -config ZX2967_WATCHDOG > - tristate "ZTE zx2967 SoCs watchdog support" > - depends on ARCH_ZX > - select WATCHDOG_CORE > - help > - Say Y here to include support for the watchdog timer > - in ZTE zx2967 SoCs. > - To compile this driver as a module, choose M here: the > - module will be called zx2967_wdt. > - > config STM32_WATCHDOG > tristate "STM32 Independent WatchDoG (IWDG) support" > depends on ARCH_STM32 > diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile > index 40b94403c487..7a95b280cd9f 100644 > --- a/drivers/watchdog/Makefile > +++ b/drivers/watchdog/Makefile > @@ -86,7 +86,6 @@ obj-$(CONFIG_BCM7038_WDT) += bcm7038_wdt.o > obj-$(CONFIG_RENESAS_WDT) += renesas_wdt.o > obj-$(CONFIG_RENESAS_RZAWDT) += rza_wdt.o > obj-$(CONFIG_ASPEED_WATCHDOG) += aspeed_wdt.o > -obj-$(CONFIG_ZX2967_WATCHDOG) += zx2967_wdt.o > obj-$(CONFIG_STM32_WATCHDOG) += stm32_iwdg.o > obj-$(CONFIG_UNIPHIER_WATCHDOG) += uniphier_wdt.o > obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o > diff --git a/drivers/watchdog/zx2967_wdt.c b/drivers/watchdog/zx2967_wdt.c > deleted file mode 100644 > index bf183e73671a..000000000000 > --- a/drivers/watchdog/zx2967_wdt.c > +++ /dev/null > @@ -1,279 +0,0 @@ > -// SPDX-License-Identifier: GPL-2.0-only > -/* > - * watchdog driver for ZTE's zx2967 family > - * > - * Copyright (C) 2017 ZTE Ltd. > - * > - * Author: Baoyou Xie <baoyou.xie@linaro.org> > - */ > - > -#include <linux/clk.h> > -#include <linux/io.h> > -#include <linux/mfd/syscon.h> > -#include <linux/module.h> > -#include <linux/of_address.h> > -#include <linux/platform_device.h> > -#include <linux/regmap.h> > -#include <linux/reset.h> > -#include <linux/watchdog.h> > - > -#define ZX2967_WDT_CFG_REG 0x4 > -#define ZX2967_WDT_LOAD_REG 0x8 > -#define ZX2967_WDT_REFRESH_REG 0x18 > -#define ZX2967_WDT_START_REG 0x1c > - > -#define ZX2967_WDT_REFRESH_MASK GENMASK(5, 0) > - > -#define ZX2967_WDT_CFG_DIV(n) ((((n) & 0xff) - 1) << 8) > -#define ZX2967_WDT_START_EN 0x1 > - > -/* > - * Hardware magic number. > - * When watchdog reg is written, the lowest 16 bits are valid, but > - * the highest 16 bits should be always this number. > - */ > -#define ZX2967_WDT_WRITEKEY (0x1234 << 16) > -#define ZX2967_WDT_VAL_MASK GENMASK(15, 0) > - > -#define ZX2967_WDT_DIV_DEFAULT 16 > -#define ZX2967_WDT_DEFAULT_TIMEOUT 32 > -#define ZX2967_WDT_MIN_TIMEOUT 1 > -#define ZX2967_WDT_MAX_TIMEOUT 524 > -#define ZX2967_WDT_MAX_COUNT 0xffff > - > -#define ZX2967_WDT_CLK_FREQ 0x8000 > - > -#define ZX2967_WDT_FLAG_REBOOT_MON BIT(0) > - > -struct zx2967_wdt { > - struct watchdog_device wdt_device; > - void __iomem *reg_base; > - struct clk *clock; > -}; > - > -static inline u32 zx2967_wdt_readl(struct zx2967_wdt *wdt, u16 reg) > -{ > - return readl_relaxed(wdt->reg_base + reg); > -} > - > -static inline void zx2967_wdt_writel(struct zx2967_wdt *wdt, u16 reg, u32 val) > -{ > - writel_relaxed(val | ZX2967_WDT_WRITEKEY, wdt->reg_base + reg); > -} > - > -static void zx2967_wdt_refresh(struct zx2967_wdt *wdt) > -{ > - u32 val; > - > - val = zx2967_wdt_readl(wdt, ZX2967_WDT_REFRESH_REG); > - /* > - * Bit 4-5, 1 and 2: refresh config info > - * Bit 2-3, 1 and 2: refresh counter > - * Bit 0-1, 1 and 2: refresh int-value > - * we shift each group value between 1 and 2 to refresh all data. > - */ > - val ^= ZX2967_WDT_REFRESH_MASK; > - zx2967_wdt_writel(wdt, ZX2967_WDT_REFRESH_REG, > - val & ZX2967_WDT_VAL_MASK); > -} > - > -static int > -zx2967_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout) > -{ > - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); > - unsigned int divisor = ZX2967_WDT_DIV_DEFAULT; > - u32 count; > - > - count = timeout * ZX2967_WDT_CLK_FREQ; > - if (count > divisor * ZX2967_WDT_MAX_COUNT) > - divisor = DIV_ROUND_UP(count, ZX2967_WDT_MAX_COUNT); > - count = DIV_ROUND_UP(count, divisor); > - zx2967_wdt_writel(wdt, ZX2967_WDT_CFG_REG, > - ZX2967_WDT_CFG_DIV(divisor) & ZX2967_WDT_VAL_MASK); > - zx2967_wdt_writel(wdt, ZX2967_WDT_LOAD_REG, > - count & ZX2967_WDT_VAL_MASK); > - zx2967_wdt_refresh(wdt); > - wdd->timeout = (count * divisor) / ZX2967_WDT_CLK_FREQ; > - > - return 0; > -} > - > -static void __zx2967_wdt_start(struct zx2967_wdt *wdt) > -{ > - u32 val; > - > - val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG); > - val |= ZX2967_WDT_START_EN; > - zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG, > - val & ZX2967_WDT_VAL_MASK); > -} > - > -static void __zx2967_wdt_stop(struct zx2967_wdt *wdt) > -{ > - u32 val; > - > - val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG); > - val &= ~ZX2967_WDT_START_EN; > - zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG, > - val & ZX2967_WDT_VAL_MASK); > -} > - > -static int zx2967_wdt_start(struct watchdog_device *wdd) > -{ > - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); > - > - zx2967_wdt_set_timeout(wdd, wdd->timeout); > - __zx2967_wdt_start(wdt); > - > - return 0; > -} > - > -static int zx2967_wdt_stop(struct watchdog_device *wdd) > -{ > - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); > - > - __zx2967_wdt_stop(wdt); > - > - return 0; > -} > - > -static int zx2967_wdt_keepalive(struct watchdog_device *wdd) > -{ > - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); > - > - zx2967_wdt_refresh(wdt); > - > - return 0; > -} > - > -#define ZX2967_WDT_OPTIONS \ > - (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE) > -static const struct watchdog_info zx2967_wdt_ident = { > - .options = ZX2967_WDT_OPTIONS, > - .identity = "zx2967 watchdog", > -}; > - > -static const struct watchdog_ops zx2967_wdt_ops = { > - .owner = THIS_MODULE, > - .start = zx2967_wdt_start, > - .stop = zx2967_wdt_stop, > - .ping = zx2967_wdt_keepalive, > - .set_timeout = zx2967_wdt_set_timeout, > -}; > - > -static void zx2967_wdt_reset_sysctrl(struct device *dev) > -{ > - int ret; > - void __iomem *regmap; > - unsigned int offset, mask, config; > - struct of_phandle_args out_args; > - > - ret = of_parse_phandle_with_fixed_args(dev->of_node, > - "zte,wdt-reset-sysctrl", 3, 0, &out_args); > - if (ret) > - return; > - > - offset = out_args.args[0]; > - config = out_args.args[1]; > - mask = out_args.args[2]; > - > - regmap = syscon_node_to_regmap(out_args.np); > - if (IS_ERR(regmap)) { > - of_node_put(out_args.np); > - return; > - } > - > - regmap_update_bits(regmap, offset, mask, config); > - of_node_put(out_args.np); > -} > - > -static void zx2967_clk_disable_unprepare(void *data) > -{ > - clk_disable_unprepare(data); > -} > - > -static int zx2967_wdt_probe(struct platform_device *pdev) > -{ > - struct device *dev = &pdev->dev; > - struct zx2967_wdt *wdt; > - int ret; > - struct reset_control *rstc; > - > - wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); > - if (!wdt) > - return -ENOMEM; > - > - platform_set_drvdata(pdev, wdt); > - > - wdt->wdt_device.info = &zx2967_wdt_ident; > - wdt->wdt_device.ops = &zx2967_wdt_ops; > - wdt->wdt_device.timeout = ZX2967_WDT_DEFAULT_TIMEOUT; > - wdt->wdt_device.max_timeout = ZX2967_WDT_MAX_TIMEOUT; > - wdt->wdt_device.min_timeout = ZX2967_WDT_MIN_TIMEOUT; > - wdt->wdt_device.parent = dev; > - > - wdt->reg_base = devm_platform_ioremap_resource(pdev, 0); > - if (IS_ERR(wdt->reg_base)) > - return PTR_ERR(wdt->reg_base); > - > - zx2967_wdt_reset_sysctrl(dev); > - > - wdt->clock = devm_clk_get(dev, NULL); > - if (IS_ERR(wdt->clock)) { > - dev_err(dev, "failed to find watchdog clock source\n"); > - return PTR_ERR(wdt->clock); > - } > - > - ret = clk_prepare_enable(wdt->clock); > - if (ret < 0) { > - dev_err(dev, "failed to enable clock\n"); > - return ret; > - } > - ret = devm_add_action_or_reset(dev, zx2967_clk_disable_unprepare, > - wdt->clock); > - if (ret) > - return ret; > - clk_set_rate(wdt->clock, ZX2967_WDT_CLK_FREQ); > - > - rstc = devm_reset_control_get_exclusive(dev, NULL); > - if (IS_ERR(rstc)) { > - dev_err(dev, "failed to get rstc"); > - return PTR_ERR(rstc); > - } > - > - reset_control_assert(rstc); > - reset_control_deassert(rstc); > - > - watchdog_set_drvdata(&wdt->wdt_device, wdt); > - watchdog_init_timeout(&wdt->wdt_device, > - ZX2967_WDT_DEFAULT_TIMEOUT, dev); > - watchdog_set_nowayout(&wdt->wdt_device, WATCHDOG_NOWAYOUT); > - > - ret = devm_watchdog_register_device(dev, &wdt->wdt_device); > - if (ret) > - return ret; > - > - dev_info(dev, "watchdog enabled (timeout=%d sec, nowayout=%d)", > - wdt->wdt_device.timeout, WATCHDOG_NOWAYOUT); > - > - return 0; > -} > - > -static const struct of_device_id zx2967_wdt_match[] = { > - { .compatible = "zte,zx296718-wdt", }, > - {} > -}; > -MODULE_DEVICE_TABLE(of, zx2967_wdt_match); > - > -static struct platform_driver zx2967_wdt_driver = { > - .probe = zx2967_wdt_probe, > - .driver = { > - .name = "zx2967-wdt", > - .of_match_table = of_match_ptr(zx2967_wdt_match), > - }, > -}; > -module_platform_driver(zx2967_wdt_driver); > - > -MODULE_AUTHOR("Baoyou Xie <baoyou.xie@linaro.org>"); > -MODULE_DESCRIPTION("ZTE zx2967 Watchdog Device Driver"); > -MODULE_LICENSE("GPL v2"); > -- > 2.29.2 >
diff --git a/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt b/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt deleted file mode 100644 index 06ce67766756..000000000000 --- a/Documentation/devicetree/bindings/watchdog/zte,zx2967-wdt.txt +++ /dev/null @@ -1,32 +0,0 @@ -ZTE zx2967 Watchdog timer - -Required properties: - -- compatible : should be one of the following. - * zte,zx296718-wdt -- reg : Specifies base physical address and size of the registers. -- clocks : Pairs of phandle and specifier referencing the controller's clocks. -- resets : Reference to the reset controller controlling the watchdog - controller. - -Optional properties: - -- timeout-sec : Contains the watchdog timeout in seconds. -- zte,wdt-reset-sysctrl : Directs how to reset system by the watchdog. - if we don't want to restart system when watchdog been triggered, - it's not required, vice versa. - It should include following fields. - * phandle of aon-sysctrl. - * offset of register that be written, should be 0xb0. - * configure value that be written to aon-sysctrl. - * bit mask, corresponding bits will be affected. - -Example: - -wdt: watchdog@1465000 { - compatible = "zte,zx296718-wdt"; - reg = <0x1465000 0x1000>; - clocks = <&topcrm WDT_WCLK>; - resets = <&toprst 35>; - zte,wdt-reset-sysctrl = <&aon_sysctrl 0xb0 1 0x115>; -}; diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index 5559e4325f6a..c36f8233f60b 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -919,16 +919,6 @@ config ASPEED_WATCHDOG To compile this driver as a module, choose M here: the module will be called aspeed_wdt. -config ZX2967_WATCHDOG - tristate "ZTE zx2967 SoCs watchdog support" - depends on ARCH_ZX - select WATCHDOG_CORE - help - Say Y here to include support for the watchdog timer - in ZTE zx2967 SoCs. - To compile this driver as a module, choose M here: the - module will be called zx2967_wdt. - config STM32_WATCHDOG tristate "STM32 Independent WatchDoG (IWDG) support" depends on ARCH_STM32 diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 40b94403c487..7a95b280cd9f 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -86,7 +86,6 @@ obj-$(CONFIG_BCM7038_WDT) += bcm7038_wdt.o obj-$(CONFIG_RENESAS_WDT) += renesas_wdt.o obj-$(CONFIG_RENESAS_RZAWDT) += rza_wdt.o obj-$(CONFIG_ASPEED_WATCHDOG) += aspeed_wdt.o -obj-$(CONFIG_ZX2967_WATCHDOG) += zx2967_wdt.o obj-$(CONFIG_STM32_WATCHDOG) += stm32_iwdg.o obj-$(CONFIG_UNIPHIER_WATCHDOG) += uniphier_wdt.o obj-$(CONFIG_RTD119X_WATCHDOG) += rtd119x_wdt.o diff --git a/drivers/watchdog/zx2967_wdt.c b/drivers/watchdog/zx2967_wdt.c deleted file mode 100644 index bf183e73671a..000000000000 --- a/drivers/watchdog/zx2967_wdt.c +++ /dev/null @@ -1,279 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * watchdog driver for ZTE's zx2967 family - * - * Copyright (C) 2017 ZTE Ltd. - * - * Author: Baoyou Xie <baoyou.xie@linaro.org> - */ - -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/mfd/syscon.h> -#include <linux/module.h> -#include <linux/of_address.h> -#include <linux/platform_device.h> -#include <linux/regmap.h> -#include <linux/reset.h> -#include <linux/watchdog.h> - -#define ZX2967_WDT_CFG_REG 0x4 -#define ZX2967_WDT_LOAD_REG 0x8 -#define ZX2967_WDT_REFRESH_REG 0x18 -#define ZX2967_WDT_START_REG 0x1c - -#define ZX2967_WDT_REFRESH_MASK GENMASK(5, 0) - -#define ZX2967_WDT_CFG_DIV(n) ((((n) & 0xff) - 1) << 8) -#define ZX2967_WDT_START_EN 0x1 - -/* - * Hardware magic number. - * When watchdog reg is written, the lowest 16 bits are valid, but - * the highest 16 bits should be always this number. - */ -#define ZX2967_WDT_WRITEKEY (0x1234 << 16) -#define ZX2967_WDT_VAL_MASK GENMASK(15, 0) - -#define ZX2967_WDT_DIV_DEFAULT 16 -#define ZX2967_WDT_DEFAULT_TIMEOUT 32 -#define ZX2967_WDT_MIN_TIMEOUT 1 -#define ZX2967_WDT_MAX_TIMEOUT 524 -#define ZX2967_WDT_MAX_COUNT 0xffff - -#define ZX2967_WDT_CLK_FREQ 0x8000 - -#define ZX2967_WDT_FLAG_REBOOT_MON BIT(0) - -struct zx2967_wdt { - struct watchdog_device wdt_device; - void __iomem *reg_base; - struct clk *clock; -}; - -static inline u32 zx2967_wdt_readl(struct zx2967_wdt *wdt, u16 reg) -{ - return readl_relaxed(wdt->reg_base + reg); -} - -static inline void zx2967_wdt_writel(struct zx2967_wdt *wdt, u16 reg, u32 val) -{ - writel_relaxed(val | ZX2967_WDT_WRITEKEY, wdt->reg_base + reg); -} - -static void zx2967_wdt_refresh(struct zx2967_wdt *wdt) -{ - u32 val; - - val = zx2967_wdt_readl(wdt, ZX2967_WDT_REFRESH_REG); - /* - * Bit 4-5, 1 and 2: refresh config info - * Bit 2-3, 1 and 2: refresh counter - * Bit 0-1, 1 and 2: refresh int-value - * we shift each group value between 1 and 2 to refresh all data. - */ - val ^= ZX2967_WDT_REFRESH_MASK; - zx2967_wdt_writel(wdt, ZX2967_WDT_REFRESH_REG, - val & ZX2967_WDT_VAL_MASK); -} - -static int -zx2967_wdt_set_timeout(struct watchdog_device *wdd, unsigned int timeout) -{ - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); - unsigned int divisor = ZX2967_WDT_DIV_DEFAULT; - u32 count; - - count = timeout * ZX2967_WDT_CLK_FREQ; - if (count > divisor * ZX2967_WDT_MAX_COUNT) - divisor = DIV_ROUND_UP(count, ZX2967_WDT_MAX_COUNT); - count = DIV_ROUND_UP(count, divisor); - zx2967_wdt_writel(wdt, ZX2967_WDT_CFG_REG, - ZX2967_WDT_CFG_DIV(divisor) & ZX2967_WDT_VAL_MASK); - zx2967_wdt_writel(wdt, ZX2967_WDT_LOAD_REG, - count & ZX2967_WDT_VAL_MASK); - zx2967_wdt_refresh(wdt); - wdd->timeout = (count * divisor) / ZX2967_WDT_CLK_FREQ; - - return 0; -} - -static void __zx2967_wdt_start(struct zx2967_wdt *wdt) -{ - u32 val; - - val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG); - val |= ZX2967_WDT_START_EN; - zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG, - val & ZX2967_WDT_VAL_MASK); -} - -static void __zx2967_wdt_stop(struct zx2967_wdt *wdt) -{ - u32 val; - - val = zx2967_wdt_readl(wdt, ZX2967_WDT_START_REG); - val &= ~ZX2967_WDT_START_EN; - zx2967_wdt_writel(wdt, ZX2967_WDT_START_REG, - val & ZX2967_WDT_VAL_MASK); -} - -static int zx2967_wdt_start(struct watchdog_device *wdd) -{ - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); - - zx2967_wdt_set_timeout(wdd, wdd->timeout); - __zx2967_wdt_start(wdt); - - return 0; -} - -static int zx2967_wdt_stop(struct watchdog_device *wdd) -{ - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); - - __zx2967_wdt_stop(wdt); - - return 0; -} - -static int zx2967_wdt_keepalive(struct watchdog_device *wdd) -{ - struct zx2967_wdt *wdt = watchdog_get_drvdata(wdd); - - zx2967_wdt_refresh(wdt); - - return 0; -} - -#define ZX2967_WDT_OPTIONS \ - (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE) -static const struct watchdog_info zx2967_wdt_ident = { - .options = ZX2967_WDT_OPTIONS, - .identity = "zx2967 watchdog", -}; - -static const struct watchdog_ops zx2967_wdt_ops = { - .owner = THIS_MODULE, - .start = zx2967_wdt_start, - .stop = zx2967_wdt_stop, - .ping = zx2967_wdt_keepalive, - .set_timeout = zx2967_wdt_set_timeout, -}; - -static void zx2967_wdt_reset_sysctrl(struct device *dev) -{ - int ret; - void __iomem *regmap; - unsigned int offset, mask, config; - struct of_phandle_args out_args; - - ret = of_parse_phandle_with_fixed_args(dev->of_node, - "zte,wdt-reset-sysctrl", 3, 0, &out_args); - if (ret) - return; - - offset = out_args.args[0]; - config = out_args.args[1]; - mask = out_args.args[2]; - - regmap = syscon_node_to_regmap(out_args.np); - if (IS_ERR(regmap)) { - of_node_put(out_args.np); - return; - } - - regmap_update_bits(regmap, offset, mask, config); - of_node_put(out_args.np); -} - -static void zx2967_clk_disable_unprepare(void *data) -{ - clk_disable_unprepare(data); -} - -static int zx2967_wdt_probe(struct platform_device *pdev) -{ - struct device *dev = &pdev->dev; - struct zx2967_wdt *wdt; - int ret; - struct reset_control *rstc; - - wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL); - if (!wdt) - return -ENOMEM; - - platform_set_drvdata(pdev, wdt); - - wdt->wdt_device.info = &zx2967_wdt_ident; - wdt->wdt_device.ops = &zx2967_wdt_ops; - wdt->wdt_device.timeout = ZX2967_WDT_DEFAULT_TIMEOUT; - wdt->wdt_device.max_timeout = ZX2967_WDT_MAX_TIMEOUT; - wdt->wdt_device.min_timeout = ZX2967_WDT_MIN_TIMEOUT; - wdt->wdt_device.parent = dev; - - wdt->reg_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(wdt->reg_base)) - return PTR_ERR(wdt->reg_base); - - zx2967_wdt_reset_sysctrl(dev); - - wdt->clock = devm_clk_get(dev, NULL); - if (IS_ERR(wdt->clock)) { - dev_err(dev, "failed to find watchdog clock source\n"); - return PTR_ERR(wdt->clock); - } - - ret = clk_prepare_enable(wdt->clock); - if (ret < 0) { - dev_err(dev, "failed to enable clock\n"); - return ret; - } - ret = devm_add_action_or_reset(dev, zx2967_clk_disable_unprepare, - wdt->clock); - if (ret) - return ret; - clk_set_rate(wdt->clock, ZX2967_WDT_CLK_FREQ); - - rstc = devm_reset_control_get_exclusive(dev, NULL); - if (IS_ERR(rstc)) { - dev_err(dev, "failed to get rstc"); - return PTR_ERR(rstc); - } - - reset_control_assert(rstc); - reset_control_deassert(rstc); - - watchdog_set_drvdata(&wdt->wdt_device, wdt); - watchdog_init_timeout(&wdt->wdt_device, - ZX2967_WDT_DEFAULT_TIMEOUT, dev); - watchdog_set_nowayout(&wdt->wdt_device, WATCHDOG_NOWAYOUT); - - ret = devm_watchdog_register_device(dev, &wdt->wdt_device); - if (ret) - return ret; - - dev_info(dev, "watchdog enabled (timeout=%d sec, nowayout=%d)", - wdt->wdt_device.timeout, WATCHDOG_NOWAYOUT); - - return 0; -} - -static const struct of_device_id zx2967_wdt_match[] = { - { .compatible = "zte,zx296718-wdt", }, - {} -}; -MODULE_DEVICE_TABLE(of, zx2967_wdt_match); - -static struct platform_driver zx2967_wdt_driver = { - .probe = zx2967_wdt_probe, - .driver = { - .name = "zx2967-wdt", - .of_match_table = of_match_ptr(zx2967_wdt_match), - }, -}; -module_platform_driver(zx2967_wdt_driver); - -MODULE_AUTHOR("Baoyou Xie <baoyou.xie@linaro.org>"); -MODULE_DESCRIPTION("ZTE zx2967 Watchdog Device Driver"); -MODULE_LICENSE("GPL v2");