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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>
This commit is contained in:
Andy Shevchenko 2016-07-04 18:36:27 +03:00 committed by Thierry Reding
parent b89b4b7a3d
commit d9cd4a7369
1 changed files with 7 additions and 5 deletions
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12
drivers/pwm/pwm-lpss.c
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@ -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;