diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2016-07-04 17:36:27 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2016-07-11 12:49:24 +0200 |
| commit | d9cd4a73693bc7153766d22079e0fc90c0fc1107 (patch) | |
| tree | 23d7470561f3df9e6727fb99678fcf7fefcf5509 /drivers/pwm/pwm-lpss.c | |
| parent | pwm: lpss: pci: Enable PWM module on Intel Edison (diff) | |
| download | linux-d9cd4a73693bc7153766d22079e0fc90c0fc1107.tar.xz linux-d9cd4a73693bc7153766d22079e0fc90c0fc1107.zip | |
pwm: lpss: Move clk_rate check to ->probe()
There is no need to check each time if the clk_rate defined or not when we call
pwm_lpss_config(). Move the check to ->probe() instead.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-lpss.c')
| -rw-r--r-- | drivers/pwm/pwm-lpss.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c index be4658b42882..72c0bce5a75c 100644 --- a/drivers/pwm/pwm-lpss.c +++ b/drivers/pwm/pwm-lpss.c @@ -92,7 +92,7 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, { struct pwm_lpss_chip *lpwm = to_lpwm(chip); unsigned long long on_time_div; - unsigned long c, base_unit_range; + unsigned long c = lpwm->info->clk_rate, base_unit_range; unsigned long long base_unit, freq = NSEC_PER_SEC; u32 ctrl; @@ -105,10 +105,6 @@ static int pwm_lpss_config(struct pwm_chip *chip, struct pwm_device *pwm, base_unit_range = BIT(lpwm->info->base_unit_bits); freq *= base_unit_range; - c = lpwm->info->clk_rate; - if (!c) - return -EINVAL; - base_unit = DIV_ROUND_CLOSEST_ULL(freq, c); if (duty_ns <= 0) @@ -169,6 +165,7 @@ struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r, const struct pwm_lpss_boardinfo *info) { struct pwm_lpss_chip *lpwm; + unsigned long c; int ret; lpwm = devm_kzalloc(dev, sizeof(*lpwm), GFP_KERNEL); @@ -180,6 +177,11 @@ struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r, return ERR_CAST(lpwm->regs); lpwm->info = info; + + c = lpwm->info->clk_rate; + if (!c) + return ERR_PTR(-EINVAL); + lpwm->chip.dev = dev; lpwm->chip.ops = &pwm_lpss_ops; lpwm->chip.base = -1; |