diff options
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-sun4i.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c index 37d75e252d4e..b973da73e9ab 100644 --- a/drivers/pwm/pwm-sun4i.c +++ b/drivers/pwm/pwm-sun4i.c @@ -118,6 +118,8 @@ static int sun4i_pwm_get_state(struct pwm_chip *chip, unsigned int prescaler; clk_rate = clk_get_rate(sun4i_pwm->clk); + if (!clk_rate) + return -EINVAL; val = sun4i_pwm_readl(sun4i_pwm, PWM_CTRL_REG); @@ -142,7 +144,7 @@ static int sun4i_pwm_get_state(struct pwm_chip *chip, prescaler = prescaler_table[PWM_REG_PRESCAL(val, pwm->hwpwm)]; if (prescaler == 0) - return 0; + return -EINVAL; if (val & BIT_CH(PWM_ACT_STATE, pwm->hwpwm)) state->polarity = PWM_POLARITY_NORMAL; |