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| author | Andrew Bresticker <abrestic@chromium.org> | 2015-04-03 10:05:21 -0700 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2015-06-22 15:54:13 +0200 |
| commit | 8aa453a533faf383fe711aa8dedcf421563ddf66 (patch) | |
| tree | 288bfe8c63ea47880cd87501d6b6be605e944447 /drivers/watchdog/imgpdc_wdt.c | |
| parent | 7094e1dd2ba98f1eb534c262deebbc65e34fe132 (diff) | |
| download | lwn-8aa453a533faf383fe711aa8dedcf421563ddf66.tar.gz lwn-8aa453a533faf383fe711aa8dedcf421563ddf66.zip | |
watchdog: imgpdc: Set timeout before starting watchdog
Set up the watchdog for the specified timeout before attempting to start it.
Signed-off-by: Naidu Tellapati <naidu.tellapati@imgtec.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/imgpdc_wdt.c')
| -rw-r--r-- | drivers/watchdog/imgpdc_wdt.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c index d6826a6dfc81..ffeb1bf85252 100644 --- a/drivers/watchdog/imgpdc_wdt.c +++ b/drivers/watchdog/imgpdc_wdt.c @@ -84,18 +84,24 @@ static int pdc_wdt_stop(struct watchdog_device *wdt_dev) return 0; } +static void __pdc_wdt_set_timeout(struct pdc_wdt_dev *wdt) +{ + unsigned long clk_rate = clk_get_rate(wdt->wdt_clk); + unsigned int val; + + val = readl(wdt->base + PDC_WDT_CONFIG) & ~PDC_WDT_CONFIG_DELAY_MASK; + val |= order_base_2(wdt->wdt_dev.timeout * clk_rate) - 1; + writel(val, wdt->base + PDC_WDT_CONFIG); +} + static int pdc_wdt_set_timeout(struct watchdog_device *wdt_dev, unsigned int new_timeout) { - unsigned int val; struct pdc_wdt_dev *wdt = watchdog_get_drvdata(wdt_dev); - unsigned long clk_rate = clk_get_rate(wdt->wdt_clk); wdt->wdt_dev.timeout = new_timeout; - val = readl(wdt->base + PDC_WDT_CONFIG) & ~PDC_WDT_CONFIG_DELAY_MASK; - val |= order_base_2(new_timeout * clk_rate) - 1; - writel(val, wdt->base + PDC_WDT_CONFIG); + __pdc_wdt_set_timeout(wdt); return 0; } @@ -106,6 +112,8 @@ static int pdc_wdt_start(struct watchdog_device *wdt_dev) unsigned int val; struct pdc_wdt_dev *wdt = watchdog_get_drvdata(wdt_dev); + __pdc_wdt_set_timeout(wdt); + val = readl(wdt->base + PDC_WDT_CONFIG); val |= PDC_WDT_CONFIG_ENABLE; writel(val, wdt->base + PDC_WDT_CONFIG); |