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pwm: sprd: Ensure configuring period and duty_cycle isn't wrongly skipped
[ Upstream commit65e2e6c1c2
] As the last call to sprd_pwm_apply() might have exited early if state->enabled was false, the values for period and duty_cycle stored in pwm->state might not have been written to hardware and it must be ensured that they are configured before enabling the PWM. Fixes:8aae4b02e8
("pwm: sprd: Add Spreadtrum PWM support") Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Thierry Reding <thierry.reding@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 4 additions and 7 deletions
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@ -180,13 +180,10 @@ static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
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}
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}
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if (state->period != cstate->period ||
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state->duty_cycle != cstate->duty_cycle) {
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ret = sprd_pwm_config(spc, pwm, state->duty_cycle,
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state->period);
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if (ret)
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return ret;
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}
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ret = sprd_pwm_config(spc, pwm, state->duty_cycle,
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state->period);
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if (ret)
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return ret;
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sprd_pwm_write(spc, pwm->hwpwm, SPRD_PWM_ENABLE, 1);
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} else if (cstate->enabled) {
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