diff options
Diffstat (limited to 'drivers/watchdog/dw_wdt.c')
| -rw-r--r-- | drivers/watchdog/dw_wdt.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c index cb0d17e361..17771c7126 100644 --- a/drivers/watchdog/dw_wdt.c +++ b/drivers/watchdog/dw_wdt.c @@ -41,10 +41,10 @@ struct dw_wdt { void __iomem *regs; - struct clk *clk; struct restart_handler restart; struct watchdog wdd; struct reset_control *rst; + unsigned int rate; }; #define to_dw_wdt(wdd) container_of(wdd, struct dw_wdt, wdd) @@ -55,7 +55,7 @@ static inline int dw_wdt_top_in_seconds(struct dw_wdt *dw_wdt, unsigned top) * There are 16 possible timeout values in 0..15 where the number of * cycles is 2 ^ (16 + i) and the watchdog counts down. */ - return (1U << (16 + top)) / clk_get_rate(dw_wdt->clk); + return (1U << (16 + top)) / dw_wdt->rate; } static int dw_wdt_start(struct watchdog *wdd) @@ -134,6 +134,7 @@ static int dw_wdt_drv_probe(struct device_d *dev) struct watchdog *wdd; struct dw_wdt *dw_wdt; struct resource *mem; + struct clk *clk; int ret; dw_wdt = xzalloc(sizeof(*dw_wdt)); @@ -143,11 +144,11 @@ static int dw_wdt_drv_probe(struct device_d *dev) if (IS_ERR(dw_wdt->regs)) return PTR_ERR(dw_wdt->regs); - dw_wdt->clk = clk_get(dev, NULL); - if (IS_ERR(dw_wdt->clk)) - return PTR_ERR(dw_wdt->clk); + clk = clk_get(dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); - ret = clk_enable(dw_wdt->clk); + ret = clk_enable(clk); if (ret) return ret; @@ -160,6 +161,10 @@ static int dw_wdt_drv_probe(struct device_d *dev) wdd->hwdev = dev; wdd->set_timeout = dw_wdt_set_timeout; + dw_wdt->rate = clk_get_rate(clk); + if (dw_wdt->rate == 0) + return -EINVAL; + ret = watchdog_register(wdd); if (ret) goto out_disable_clk; @@ -179,7 +184,7 @@ static int dw_wdt_drv_probe(struct device_d *dev) return 0; out_disable_clk: - clk_disable(dw_wdt->clk); + clk_disable(clk); return ret; } |