diff options
| author | Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com> | 2020-04-06 13:29:52 +0530 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2020-04-15 08:54:07 +0200 |
| commit | 19a159f94ac1532ec12cf14a96c9daf172ade988 (patch) | |
| tree | d8359bfc34d7c2425b89dfa8cf7f8ed32b7be2c9 /drivers/watchdog | |
| parent | 40d7f3c8d111d4e4b6c1df105d5a4cedf5b7d6c1 (diff) | |
watchdog: sp805_wdt: get platform clock from dt file
Get the watchdog platform clock from the DTS file
using clk subsystem and use the same for calculating
ticks in msec.
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Signed-off-by: Bharat Kumar Reddy Gooty <bharat.gooty@broadcom.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/sp805_wdt.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index ca3ccbe76c..65fd2384f1 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -7,6 +7,7 @@ #include <asm/io.h> #include <common.h> +#include <clk.h> #include <dm/device.h> #include <dm/fdtaddr.h> #include <dm/read.h> @@ -34,6 +35,7 @@ DECLARE_GLOBAL_DATA_PTR; struct sp805_wdt_priv { void __iomem *reg; + unsigned long clk_rate; }; static int sp805_wdt_reset(struct udevice *dev) @@ -63,8 +65,13 @@ static int sp805_wdt_start(struct udevice *dev, u64 timeout, ulong flags) * set 120s, the gd->bus_clk is less than 1145MHz, the load_value will * not overflow. */ - load_value = (gd->bus_clk) / - (2 * 1000 * SYS_FSL_WDT_CLK_DIV) * load_time; + if (gd->bus_clk) { + load_value = (gd->bus_clk) / + (2 * 1000 * SYS_FSL_WDT_CLK_DIV) * load_time; + } else { + /* platform provide clk */ + load_value = (timeout / 2) * (priv->clk_rate / 1000); + } writel(UNLOCK, priv->reg + WDTLOCK); writel(load_value, priv->reg + WDTLOAD); @@ -105,11 +112,15 @@ static int sp805_wdt_probe(struct udevice *dev) static int sp805_wdt_ofdata_to_platdata(struct udevice *dev) { struct sp805_wdt_priv *priv = dev_get_priv(dev); + struct clk clk; priv->reg = (void __iomem *)dev_read_addr(dev); if (IS_ERR(priv->reg)) return PTR_ERR(priv->reg); + if (!clk_get_by_index(dev, 0, &clk)) + priv->clk_rate = clk_get_rate(&clk); + return 0; } |