diff options
| author | Artur Weber <aweber.kernel@gmail.com> | 2023-05-19 20:07:26 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-06-08 16:49:11 +0100 |
| commit | c1ff7da03e164265cd19f95ac0926c22d28eec19 (patch) | |
| tree | 94c853a75b5c29f6165d9a50203bcacd816519c0 /drivers/video | |
| parent | 24b8ae3e2e2f675e78bdf97f24de285c4a38cbcb (diff) | |
video: backlight: lp855x: Get PWM for PWM mode during probe
Also deprecate the pwm-period DT property, as it is now redundant
(pwms property already contains period value).
Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230519180728.2281-3-aweber.kernel@gmail.com
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/backlight/lp855x_bl.c | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c index caac1cfacbe8..1c9e921bca14 100644 --- a/drivers/video/backlight/lp855x_bl.c +++ b/drivers/video/backlight/lp855x_bl.c @@ -218,23 +218,10 @@ err: static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) { - struct pwm_device *pwm; struct pwm_state state; - /* request pwm device with the consumer name */ - if (!lp->pwm) { - pwm = devm_pwm_get(lp->dev, lp->chipname); - if (IS_ERR(pwm)) - return; - - lp->pwm = pwm; - - pwm_init_state(lp->pwm, &state); - } else { - pwm_get_state(lp->pwm, &state); - } + pwm_get_state(lp->pwm, &state); - state.period = lp->pdata->period_ns; state.duty_cycle = div_u64(br * state.period, max_br); state.enabled = state.duty_cycle; @@ -339,6 +326,7 @@ static int lp855x_parse_dt(struct lp855x *lp) of_property_read_string(node, "bl-name", &pdata->name); of_property_read_u8(node, "dev-ctrl", &pdata->device_control); of_property_read_u8(node, "init-brt", &pdata->initial_brightness); + /* Deprecated, specify period in pwms property instead */ of_property_read_u32(node, "pwm-period", &pdata->period_ns); /* Fill ROM platform data if defined */ @@ -399,6 +387,7 @@ static int lp855x_probe(struct i2c_client *cl) const struct i2c_device_id *id = i2c_client_get_device_id(cl); const struct acpi_device_id *acpi_id = NULL; struct device *dev = &cl->dev; + struct pwm_state pwmstate; struct lp855x *lp; int ret; @@ -457,11 +446,6 @@ static int lp855x_probe(struct i2c_client *cl) } } - if (lp->pdata->period_ns > 0) - lp->mode = PWM_BASED; - else - lp->mode = REGISTER_BASED; - lp->supply = devm_regulator_get(dev, "power"); if (IS_ERR(lp->supply)) { if (PTR_ERR(lp->supply) == -EPROBE_DEFER) @@ -472,11 +456,31 @@ static int lp855x_probe(struct i2c_client *cl) lp->enable = devm_regulator_get_optional(dev, "enable"); if (IS_ERR(lp->enable)) { ret = PTR_ERR(lp->enable); - if (ret == -ENODEV) { + if (ret == -ENODEV) lp->enable = NULL; - } else { + else return dev_err_probe(dev, ret, "getting enable regulator\n"); - } + } + + lp->pwm = devm_pwm_get(lp->dev, lp->chipname); + if (IS_ERR(lp->pwm)) { + ret = PTR_ERR(lp->pwm); + if (ret == -ENODEV || ret == -EINVAL) + lp->pwm = NULL; + else + return dev_err_probe(dev, ret, "getting PWM\n"); + + lp->mode = REGISTER_BASED; + dev_dbg(dev, "mode: register based\n"); + } else { + pwm_init_state(lp->pwm, &pwmstate); + /* Legacy platform data compatibility */ + if (lp->pdata->period_ns > 0) + pwmstate.period = lp->pdata->period_ns; + pwm_apply_state(lp->pwm, &pwmstate); + + lp->mode = PWM_BASED; + dev_dbg(dev, "mode: PWM based\n"); } if (lp->supply) { |