diff options
| author | Douglas Anderson <dianders@chromium.org> | 2022-01-05 16:13:40 -0800 |
|---|---|---|
| committer | Douglas Anderson <dianders@chromium.org> | 2022-01-05 16:13:40 -0800 |
| commit | ef1270e99460055ee7d66a4a22dd74bf61c17aa5 (patch) | |
| tree | 9cde5969ac70f1cdf84a4bbcc8adc2deacf4bb47 /drivers/pwm/core.c | |
| parent | 1a4af2e40c98b62c8aaf7cb692cd9600291d339b (diff) | |
| parent | cb6846fbb83b574c85c2a80211b402a6347b60b1 (diff) | |
Merge remote-tracking branch 'drm/drm-next' into drm-tip
# Conflicts:
# drivers/gpu/drm/nouveau/nouveau_fence.c
Diffstat (limited to 'drivers/pwm/core.c')
| -rw-r--r-- | drivers/pwm/core.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index fb04a439462c..93772ab8d7e3 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -152,6 +152,32 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args) } EXPORT_SYMBOL_GPL(of_pwm_xlate_with_flags); +struct pwm_device * +of_pwm_single_xlate(struct pwm_chip *pc, const struct of_phandle_args *args) +{ + struct pwm_device *pwm; + + if (pc->of_pwm_n_cells < 1) + return ERR_PTR(-EINVAL); + + /* validate that one cell is specified, optionally with flags */ + if (args->args_count != 1 && args->args_count != 2) + return ERR_PTR(-EINVAL); + + pwm = pwm_request_from_chip(pc, 0, NULL); + if (IS_ERR(pwm)) + return pwm; + + pwm->args.period = args->args[0]; + pwm->args.polarity = PWM_POLARITY_NORMAL; + + if (args->args_count == 2 && args->args[2] & PWM_POLARITY_INVERTED) + pwm->args.polarity = PWM_POLARITY_INVERSED; + + return pwm; +} +EXPORT_SYMBOL_GPL(of_pwm_single_xlate); + static void of_pwmchip_add(struct pwm_chip *chip) { if (!chip->dev || !chip->dev->of_node) |