From: Allen-KH Cheng Date: Tue, 17 Jan 2023 01:40:23 +0000 (+0800) Subject: watchdog: mtk_wdt: Add reset_by_toprgu support X-Git-Tag: v6.6.17~5377^2~50 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a224764f97d28f1132cab02b79ae4c08a6de471e;p=platform%2Fkernel%2Flinux-rpi.git watchdog: mtk_wdt: Add reset_by_toprgu support In some cases, the MediaTek watchdog requires the TOPRGU to reset timer after system resets. Provide a reset_by_toprgu parameter for configuration. Signed-off-by: Allen-KH Cheng Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20230117014023.2993-3-allen-kh.cheng@mediatek.com Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 3e62125..a9c4375 100644 --- a/drivers/watchdog/mtk_wdt.c +++ b/drivers/watchdog/mtk_wdt.c @@ -50,6 +50,7 @@ #define WDT_MODE_IRQ_EN (1 << 3) #define WDT_MODE_AUTO_START (1 << 4) #define WDT_MODE_DUAL_EN (1 << 6) +#define WDT_MODE_CNT_SEL (1 << 8) #define WDT_MODE_KEY 0x22000000 #define WDT_SWRST 0x14 @@ -70,6 +71,7 @@ struct mtk_wdt_dev { spinlock_t lock; /* protects WDT_SWSYSRST reg */ struct reset_controller_dev rcdev; bool disable_wdt_extrst; + bool reset_by_toprgu; }; struct mtk_wdt_data { @@ -279,6 +281,8 @@ static int mtk_wdt_start(struct watchdog_device *wdt_dev) reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN); if (mtk_wdt->disable_wdt_extrst) reg &= ~WDT_MODE_EXRST_EN; + if (mtk_wdt->reset_by_toprgu) + reg |= WDT_MODE_CNT_SEL; reg |= (WDT_MODE_EN | WDT_MODE_KEY); iowrite32(reg, wdt_base + WDT_MODE); @@ -408,6 +412,9 @@ static int mtk_wdt_probe(struct platform_device *pdev) mtk_wdt->disable_wdt_extrst = of_property_read_bool(dev->of_node, "mediatek,disable-extrst"); + mtk_wdt->reset_by_toprgu = + of_property_read_bool(dev->of_node, "mediatek,reset-by-toprgu"); + return 0; }