| Message ID | 20230116105305.31818-3-allen-kh.cheng@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mtk-wdt: Add reset-by-toprgu support | expand |
Il 16/01/23 11:53, Allen-KH Cheng ha scritto: > 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 <allen-kh.cheng@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
On 1/16/23 02:53, Allen-KH Cheng wrote: > 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 <allen-kh.cheng@mediatek.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/mtk_wdt.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c > index 3e6212591e69..a9c437598e7e 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; > } >
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c index 3e6212591e69..a9c437598e7e 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; }
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 <allen-kh.cheng@mediatek.com> --- drivers/watchdog/mtk_wdt.c | 7 +++++++ 1 file changed, 7 insertions(+)