Add optional support for fetching watchdog clock rate from DT. This is optional as not all platforms using DW WDT support the clock framework yet.
Signed-off-by: Marek Vasut marex@denx.de Cc: Chin Liang See chin.liang.see@intel.com Cc: Dalon Westergreen dwesterg@gmail.com Cc: Dinh Nguyen dinguyen@kernel.org Cc: Jagan Teki jagan@amarulasolutions.com Cc: Ley Foon Tan ley.foon.tan@intel.com Cc: Philipp Tomisch philipp.tomisch@theobroma-systems.com Cc: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com Cc: Tien Fong Chee tien.fong.chee@intel.com --- V2: - New patch --- drivers/watchdog/designware_wdt.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/designware_wdt.c b/drivers/watchdog/designware_wdt.c index a7b735979a..66621e8bb5 100644 --- a/drivers/watchdog/designware_wdt.c +++ b/drivers/watchdog/designware_wdt.c @@ -20,6 +20,7 @@
struct designware_wdt_priv { void __iomem *base; + unsigned int clk_khz; };
/* @@ -106,7 +107,7 @@ static int designware_wdt_start(struct udevice *dev, u64 timeout, ulong flags) designware_wdt_stop(dev);
/* set timer in miliseconds */ - designware_wdt_settimeout(priv->base, CONFIG_DW_WDT_CLOCK_KHZ, timeout); + designware_wdt_settimeout(priv->base, priv->clk_khz, timeout);
designware_wdt_enable(priv->base);
@@ -122,6 +123,20 @@ static int designware_wdt_probe(struct udevice *dev) if (!priv->base) return -EINVAL;
+#if CONFIG_IS_ENABLED(CLK) + struct clk clk; + + ret = clk_get_by_index(dev, 0, &clk); + if (ret) + return ret; + + priv->clk_khz = clk_get_rate(&clk); + if (!priv->clk_khz) + return -EINVAL; +#else + priv->clk_khz = CONFIG_DW_WDT_CLOCK_KHZ; +#endif + /* reset to disable the watchdog */ return designware_wdt_stop(dev); }