diff options
Diffstat (limited to 'target/linux/gemini/patches-4.14/0018-watchdog-gemini-ftwdt010-rename-driver-and-symbols.patch')
| -rw-r--r-- | target/linux/gemini/patches-4.14/0018-watchdog-gemini-ftwdt010-rename-driver-and-symbols.patch | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-4.14/0018-watchdog-gemini-ftwdt010-rename-driver-and-symbols.patch b/target/linux/gemini/patches-4.14/0018-watchdog-gemini-ftwdt010-rename-driver-and-symbols.patch new file mode 100644 index 0000000000..23c1989357 --- /dev/null +++ b/target/linux/gemini/patches-4.14/0018-watchdog-gemini-ftwdt010-rename-driver-and-symbols.patch @@ -0,0 +1,527 @@ +From c197a5a04d658da490de08636066a6bdbebf16c5 Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Mon, 16 Oct 2017 22:54:24 +0200 +Subject: [PATCH 18/31] watchdog: gemini/ftwdt010: rename driver and symbols + +This renames all the driver files and symbols for the Gemini +watchdog to FTWDT010 as it has been revealed that this IP block +is a generic watchdog timer from Faraday Technology used in +several SoC designs. + +Select this driver by default for the Gemini, it is a sensible +driver to always have enabled. + +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +Reviewed-by: Guenter Roeck <linux@roeck-us.net> +Signed-off-by: Guenter Roeck <linux@roeck-us.net> +Signed-off-by: Wim Van Sebroeck <wim@iguana.be> +--- + drivers/watchdog/Kconfig | 14 +-- + drivers/watchdog/Makefile | 2 +- + drivers/watchdog/{gemini_wdt.c => ftwdt010_wdt.c} | 117 +++++++++++----------- + 3 files changed, 68 insertions(+), 65 deletions(-) + rename drivers/watchdog/{gemini_wdt.c => ftwdt010_wdt.c} (50%) + +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -321,16 +321,18 @@ config 977_WATCHDOG + + Not sure? It's safe to say N. + +-config GEMINI_WATCHDOG +- tristate "Gemini watchdog" +- depends on ARCH_GEMINI ++config FTWDT010_WATCHDOG ++ tristate "Faraday Technology FTWDT010 watchdog" ++ depends on ARM || COMPILE_TEST + select WATCHDOG_CORE ++ default ARCH_GEMINI + help +- Say Y here if to include support for the watchdog timer +- embedded in the Cortina Systems Gemini family of devices. ++ Say Y here if to include support for the Faraday Technology ++ FTWDT010 watchdog timer embedded in the Cortina Systems Gemini ++ family of devices. + + To compile this driver as a module, choose M here: the +- module will be called gemini_wdt. ++ module will be called ftwdt010_wdt. + + config IXP4XX_WATCHDOG + tristate "IXP4xx Watchdog" +--- a/drivers/watchdog/Makefile ++++ b/drivers/watchdog/Makefile +@@ -46,7 +46,7 @@ obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt. + obj-$(CONFIG_TWL4030_WATCHDOG) += twl4030_wdt.o + obj-$(CONFIG_21285_WATCHDOG) += wdt285.o + obj-$(CONFIG_977_WATCHDOG) += wdt977.o +-obj-$(CONFIG_GEMINI_WATCHDOG) += gemini_wdt.o ++obj-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o + obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o + obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o + obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o +--- a/drivers/watchdog/gemini_wdt.c ++++ /dev/null +@@ -1,229 +0,0 @@ +-/* +- * Watchdog driver for Cortina Systems Gemini SoC +- * +- * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org> +- * +- * Inspired by the out-of-tree drivers from OpenWRT: +- * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> +- * +- * 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/bitops.h> +-#include <linux/init.h> +-#include <linux/interrupt.h> +-#include <linux/io.h> +-#include <linux/kernel.h> +-#include <linux/module.h> +-#include <linux/of_device.h> +-#include <linux/platform_device.h> +-#include <linux/slab.h> +-#include <linux/watchdog.h> +- +-#define GEMINI_WDCOUNTER 0x0 +-#define GEMINI_WDLOAD 0x4 +-#define GEMINI_WDRESTART 0x8 +-#define GEMINI_WDCR 0xC +- +-#define WDRESTART_MAGIC 0x5AB9 +- +-#define WDCR_CLOCK_5MHZ BIT(4) +-#define WDCR_SYS_RST BIT(1) +-#define WDCR_ENABLE BIT(0) +- +-#define WDT_CLOCK 5000000 /* 5 MHz */ +- +-struct gemini_wdt { +- struct watchdog_device wdd; +- struct device *dev; +- void __iomem *base; +-}; +- +-static inline +-struct gemini_wdt *to_gemini_wdt(struct watchdog_device *wdd) +-{ +- return container_of(wdd, struct gemini_wdt, wdd); +-} +- +-static int gemini_wdt_start(struct watchdog_device *wdd) +-{ +- struct gemini_wdt *gwdt = to_gemini_wdt(wdd); +- +- writel(wdd->timeout * WDT_CLOCK, gwdt->base + GEMINI_WDLOAD); +- writel(WDRESTART_MAGIC, gwdt->base + GEMINI_WDRESTART); +- /* set clock before enabling */ +- writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST, +- gwdt->base + GEMINI_WDCR); +- writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST | WDCR_ENABLE, +- gwdt->base + GEMINI_WDCR); +- +- return 0; +-} +- +-static int gemini_wdt_stop(struct watchdog_device *wdd) +-{ +- struct gemini_wdt *gwdt = to_gemini_wdt(wdd); +- +- writel(0, gwdt->base + GEMINI_WDCR); +- +- return 0; +-} +- +-static int gemini_wdt_ping(struct watchdog_device *wdd) +-{ +- struct gemini_wdt *gwdt = to_gemini_wdt(wdd); +- +- writel(WDRESTART_MAGIC, gwdt->base + GEMINI_WDRESTART); +- +- return 0; +-} +- +-static int gemini_wdt_set_timeout(struct watchdog_device *wdd, +- unsigned int timeout) +-{ +- wdd->timeout = timeout; +- if (watchdog_active(wdd)) +- gemini_wdt_start(wdd); +- +- return 0; +-} +- +-static irqreturn_t gemini_wdt_interrupt(int irq, void *data) +-{ +- struct gemini_wdt *gwdt = data; +- +- watchdog_notify_pretimeout(&gwdt->wdd); +- +- return IRQ_HANDLED; +-} +- +-static const struct watchdog_ops gemini_wdt_ops = { +- .start = gemini_wdt_start, +- .stop = gemini_wdt_stop, +- .ping = gemini_wdt_ping, +- .set_timeout = gemini_wdt_set_timeout, +- .owner = THIS_MODULE, +-}; +- +-static const struct watchdog_info gemini_wdt_info = { +- .options = WDIOF_KEEPALIVEPING +- | WDIOF_MAGICCLOSE +- | WDIOF_SETTIMEOUT, +- .identity = KBUILD_MODNAME, +-}; +- +- +-static int gemini_wdt_probe(struct platform_device *pdev) +-{ +- struct device *dev = &pdev->dev; +- struct resource *res; +- struct gemini_wdt *gwdt; +- unsigned int reg; +- int irq; +- int ret; +- +- gwdt = devm_kzalloc(dev, sizeof(*gwdt), GFP_KERNEL); +- if (!gwdt) +- return -ENOMEM; +- +- res = platform_get_resource(pdev, IORESOURCE_MEM, 0); +- gwdt->base = devm_ioremap_resource(dev, res); +- if (IS_ERR(gwdt->base)) +- return PTR_ERR(gwdt->base); +- +- irq = platform_get_irq(pdev, 0); +- if (!irq) +- return -EINVAL; +- +- gwdt->dev = dev; +- gwdt->wdd.info = &gemini_wdt_info; +- gwdt->wdd.ops = &gemini_wdt_ops; +- gwdt->wdd.min_timeout = 1; +- gwdt->wdd.max_timeout = 0xFFFFFFFF / WDT_CLOCK; +- gwdt->wdd.parent = dev; +- +- /* +- * If 'timeout-sec' unspecified in devicetree, assume a 13 second +- * default. +- */ +- gwdt->wdd.timeout = 13U; +- watchdog_init_timeout(&gwdt->wdd, 0, dev); +- +- reg = readw(gwdt->base + GEMINI_WDCR); +- if (reg & WDCR_ENABLE) { +- /* Watchdog was enabled by the bootloader, disable it. */ +- reg &= ~WDCR_ENABLE; +- writel(reg, gwdt->base + GEMINI_WDCR); +- } +- +- ret = devm_request_irq(dev, irq, gemini_wdt_interrupt, 0, +- "watchdog bark", gwdt); +- if (ret) +- return ret; +- +- ret = devm_watchdog_register_device(dev, &gwdt->wdd); +- if (ret) { +- dev_err(&pdev->dev, "failed to register watchdog\n"); +- return ret; +- } +- +- /* Set up platform driver data */ +- platform_set_drvdata(pdev, gwdt); +- dev_info(dev, "Gemini watchdog driver enabled\n"); +- +- return 0; +-} +- +-static int __maybe_unused gemini_wdt_suspend(struct device *dev) +-{ +- struct gemini_wdt *gwdt = dev_get_drvdata(dev); +- unsigned int reg; +- +- reg = readw(gwdt->base + GEMINI_WDCR); +- reg &= ~WDCR_ENABLE; +- writel(reg, gwdt->base + GEMINI_WDCR); +- +- return 0; +-} +- +-static int __maybe_unused gemini_wdt_resume(struct device *dev) +-{ +- struct gemini_wdt *gwdt = dev_get_drvdata(dev); +- unsigned int reg; +- +- if (watchdog_active(&gwdt->wdd)) { +- reg = readw(gwdt->base + GEMINI_WDCR); +- reg |= WDCR_ENABLE; +- writel(reg, gwdt->base + GEMINI_WDCR); +- } +- +- return 0; +-} +- +-static const struct dev_pm_ops gemini_wdt_dev_pm_ops = { +- SET_SYSTEM_SLEEP_PM_OPS(gemini_wdt_suspend, +- gemini_wdt_resume) +-}; +- +-#ifdef CONFIG_OF +-static const struct of_device_id gemini_wdt_match[] = { +- { .compatible = "cortina,gemini-watchdog" }, +- {}, +-}; +-MODULE_DEVICE_TABLE(of, gemini_wdt_match); +-#endif +- +-static struct platform_driver gemini_wdt_driver = { +- .probe = gemini_wdt_probe, +- .driver = { +- .name = "gemini-wdt", +- .of_match_table = of_match_ptr(gemini_wdt_match), +- .pm = &gemini_wdt_dev_pm_ops, +- }, +-}; +-module_platform_driver(gemini_wdt_driver); +-MODULE_AUTHOR("Linus Walleij"); +-MODULE_DESCRIPTION("Watchdog driver for Gemini"); +-MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/drivers/watchdog/ftwdt010_wdt.c +@@ -0,0 +1,230 @@ ++/* ++ * Watchdog driver for Faraday Technology FTWDT010 ++ * ++ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org> ++ * ++ * Inspired by the out-of-tree drivers from OpenWRT: ++ * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt> ++ * ++ * 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/bitops.h> ++#include <linux/init.h> ++#include <linux/interrupt.h> ++#include <linux/io.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/of_device.h> ++#include <linux/platform_device.h> ++#include <linux/slab.h> ++#include <linux/watchdog.h> ++ ++#define FTWDT010_WDCOUNTER 0x0 ++#define FTWDT010_WDLOAD 0x4 ++#define FTWDT010_WDRESTART 0x8 ++#define FTWDT010_WDCR 0xC ++ ++#define WDRESTART_MAGIC 0x5AB9 ++ ++#define WDCR_CLOCK_5MHZ BIT(4) ++#define WDCR_SYS_RST BIT(1) ++#define WDCR_ENABLE BIT(0) ++ ++#define WDT_CLOCK 5000000 /* 5 MHz */ ++ ++struct ftwdt010_wdt { ++ struct watchdog_device wdd; ++ struct device *dev; ++ void __iomem *base; ++}; ++ ++static inline ++struct ftwdt010_wdt *to_ftwdt010_wdt(struct watchdog_device *wdd) ++{ ++ return container_of(wdd, struct ftwdt010_wdt, wdd); ++} ++ ++static int ftwdt010_wdt_start(struct watchdog_device *wdd) ++{ ++ struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd); ++ ++ writel(wdd->timeout * WDT_CLOCK, gwdt->base + FTWDT010_WDLOAD); ++ writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART); ++ /* set clock before enabling */ ++ writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST, ++ gwdt->base + FTWDT010_WDCR); ++ writel(WDCR_CLOCK_5MHZ | WDCR_SYS_RST | WDCR_ENABLE, ++ gwdt->base + FTWDT010_WDCR); ++ ++ return 0; ++} ++ ++static int ftwdt010_wdt_stop(struct watchdog_device *wdd) ++{ ++ struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd); ++ ++ writel(0, gwdt->base + FTWDT010_WDCR); ++ ++ return 0; ++} ++ ++static int ftwdt010_wdt_ping(struct watchdog_device *wdd) ++{ ++ struct ftwdt010_wdt *gwdt = to_ftwdt010_wdt(wdd); ++ ++ writel(WDRESTART_MAGIC, gwdt->base + FTWDT010_WDRESTART); ++ ++ return 0; ++} ++ ++static int ftwdt010_wdt_set_timeout(struct watchdog_device *wdd, ++ unsigned int timeout) ++{ ++ wdd->timeout = timeout; ++ if (watchdog_active(wdd)) ++ ftwdt010_wdt_start(wdd); ++ ++ return 0; ++} ++ ++static irqreturn_t ftwdt010_wdt_interrupt(int irq, void *data) ++{ ++ struct ftwdt010_wdt *gwdt = data; ++ ++ watchdog_notify_pretimeout(&gwdt->wdd); ++ ++ return IRQ_HANDLED; ++} ++ ++static const struct watchdog_ops ftwdt010_wdt_ops = { ++ .start = ftwdt010_wdt_start, ++ .stop = ftwdt010_wdt_stop, ++ .ping = ftwdt010_wdt_ping, ++ .set_timeout = ftwdt010_wdt_set_timeout, ++ .owner = THIS_MODULE, ++}; ++ ++static const struct watchdog_info ftwdt010_wdt_info = { ++ .options = WDIOF_KEEPALIVEPING ++ | WDIOF_MAGICCLOSE ++ | WDIOF_SETTIMEOUT, ++ .identity = KBUILD_MODNAME, ++}; ++ ++ ++static int ftwdt010_wdt_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct resource *res; ++ struct ftwdt010_wdt *gwdt; ++ unsigned int reg; ++ int irq; ++ int ret; ++ ++ gwdt = devm_kzalloc(dev, sizeof(*gwdt), GFP_KERNEL); ++ if (!gwdt) ++ return -ENOMEM; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ gwdt->base = devm_ioremap_resource(dev, res); ++ if (IS_ERR(gwdt->base)) ++ return PTR_ERR(gwdt->base); ++ ++ irq = platform_get_irq(pdev, 0); ++ if (!irq) ++ return -EINVAL; ++ ++ gwdt->dev = dev; ++ gwdt->wdd.info = &ftwdt010_wdt_info; ++ gwdt->wdd.ops = &ftwdt010_wdt_ops; ++ gwdt->wdd.min_timeout = 1; ++ gwdt->wdd.max_timeout = 0xFFFFFFFF / WDT_CLOCK; ++ gwdt->wdd.parent = dev; ++ ++ /* ++ * If 'timeout-sec' unspecified in devicetree, assume a 13 second ++ * default. ++ */ ++ gwdt->wdd.timeout = 13U; ++ watchdog_init_timeout(&gwdt->wdd, 0, dev); ++ ++ reg = readw(gwdt->base + FTWDT010_WDCR); ++ if (reg & WDCR_ENABLE) { ++ /* Watchdog was enabled by the bootloader, disable it. */ ++ reg &= ~WDCR_ENABLE; ++ writel(reg, gwdt->base + FTWDT010_WDCR); ++ } ++ ++ ret = devm_request_irq(dev, irq, ftwdt010_wdt_interrupt, 0, ++ "watchdog bark", gwdt); ++ if (ret) ++ return ret; ++ ++ ret = devm_watchdog_register_device(dev, &gwdt->wdd); ++ if (ret) { ++ dev_err(&pdev->dev, "failed to register watchdog\n"); ++ return ret; ++ } ++ ++ /* Set up platform driver data */ ++ platform_set_drvdata(pdev, gwdt); ++ dev_info(dev, "FTWDT010 watchdog driver enabled\n"); ++ ++ return 0; ++} ++ ++static int __maybe_unused ftwdt010_wdt_suspend(struct device *dev) ++{ ++ struct ftwdt010_wdt *gwdt = dev_get_drvdata(dev); ++ unsigned int reg; ++ ++ reg = readw(gwdt->base + FTWDT010_WDCR); ++ reg &= ~WDCR_ENABLE; ++ writel(reg, gwdt->base + FTWDT010_WDCR); ++ ++ return 0; ++} ++ ++static int __maybe_unused ftwdt010_wdt_resume(struct device *dev) ++{ ++ struct ftwdt010_wdt *gwdt = dev_get_drvdata(dev); ++ unsigned int reg; ++ ++ if (watchdog_active(&gwdt->wdd)) { ++ reg = readw(gwdt->base + FTWDT010_WDCR); ++ reg |= WDCR_ENABLE; ++ writel(reg, gwdt->base + FTWDT010_WDCR); ++ } ++ ++ return 0; ++} ++ ++static const struct dev_pm_ops ftwdt010_wdt_dev_pm_ops = { ++ SET_SYSTEM_SLEEP_PM_OPS(ftwdt010_wdt_suspend, ++ ftwdt010_wdt_resume) ++}; ++ ++#ifdef CONFIG_OF ++static const struct of_device_id ftwdt010_wdt_match[] = { ++ { .compatible = "faraday,ftwdt010" }, ++ { .compatible = "cortina,gemini-watchdog" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, ftwdt010_wdt_match); ++#endif ++ ++static struct platform_driver ftwdt010_wdt_driver = { ++ .probe = ftwdt010_wdt_probe, ++ .driver = { ++ .name = "ftwdt010-wdt", ++ .of_match_table = of_match_ptr(ftwdt010_wdt_match), ++ .pm = &ftwdt010_wdt_dev_pm_ops, ++ }, ++}; ++module_platform_driver(ftwdt010_wdt_driver); ++MODULE_AUTHOR("Linus Walleij"); ++MODULE_DESCRIPTION("Watchdog driver for Faraday Technology FTWDT010"); ++MODULE_LICENSE("GPL"); |