diff options
Diffstat (limited to 'drivers/pwm/core.c')
| -rw-r--r-- | drivers/pwm/core.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 675b252d9c8c..ccd54c089bab 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -242,6 +242,9 @@ int pwm_round_waveform_might_sleep(struct pwm_device *pwm, struct pwm_waveform * BUG_ON(WFHWSIZE < ops->sizeof_wfhw); + if (!pwmchip_supports_waveform(chip)) + return -EOPNOTSUPP; + if (!pwm_wf_valid(wf)) return -EINVAL; @@ -294,6 +297,9 @@ int pwm_get_waveform_might_sleep(struct pwm_device *pwm, struct pwm_waveform *wf BUG_ON(WFHWSIZE < ops->sizeof_wfhw); + if (!pwmchip_supports_waveform(chip) || !ops->read_waveform) + return -EOPNOTSUPP; + guard(pwmchip)(chip); if (!chip->operational) @@ -320,6 +326,9 @@ static int __pwm_set_waveform(struct pwm_device *pwm, BUG_ON(WFHWSIZE < ops->sizeof_wfhw); + if (!pwmchip_supports_waveform(chip)) + return -EOPNOTSUPP; + if (!pwm_wf_valid(wf)) return -EINVAL; @@ -592,7 +601,7 @@ static int __pwm_apply(struct pwm_device *pwm, const struct pwm_state *state) state->usage_power == pwm->state.usage_power) return 0; - if (ops->write_waveform) { + if (pwmchip_supports_waveform(chip)) { struct pwm_waveform wf; char wfhw[WFHWSIZE]; @@ -746,7 +755,7 @@ int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state) if (!chip->operational) return -ENODEV; - if (ops->read_waveform) { + if (pwmchip_supports_waveform(chip) && ops->read_waveform) { char wfhw[WFHWSIZE]; struct pwm_waveform wf; @@ -1276,7 +1285,7 @@ static int pwm_export_child(struct device *pwmchip_dev, struct pwm_device *pwm) return 0; } -static int pwm_unexport_match(struct device *pwm_dev, void *data) +static int pwm_unexport_match(struct device *pwm_dev, const void *data) { return pwm_from_dev(pwm_dev) == data; } |