[PATCH v2] backlight: lp855x: Switch to atomic PWM API
From: Maíra Canal <hidden>
Date: 2021-10-27 18:45:50
Also in:
dri-devel, linux-pwm, llvm
Subsystem:
backlight class/subsystem, framebuffer layer, the rest · Maintainers:
Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds
Remove legacy PWM interface (pwm_config, pwm_enable, pwm_disable) and replace it for the atomic PWM API. Signed-off-by: Maíra Canal <redacted> Reported-by: kernel test robot <redacted> --- V1 -> V2: Initializing variable and simplyfing conditional loop --- drivers/video/backlight/lp855x_bl.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-)
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index e94932c69f54..a895a8ca6d26 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c@@ -233,9 +233,8 @@ static int lp855x_configure(struct lp855x *lp) static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) { - unsigned int period = lp->pdata->period_ns; - unsigned int duty = br * period / max_br; - struct pwm_device *pwm; + struct pwm_device *pwm = NULL; + struct pwm_state state; /* request pwm device with the consumer name */ if (!lp->pwm) {
@@ -244,19 +243,15 @@ static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) return; lp->pwm = pwm; - - /* - * FIXME: pwm_apply_args() should be removed when switching to - * the atomic PWM API. - */ - pwm_apply_args(pwm); } - pwm_config(lp->pwm, duty, period); - if (duty) - pwm_enable(lp->pwm); - else - pwm_disable(lp->pwm); + pwm_init_state(pwm, &state); + + state.period = lp->pdata->period_ns; + state.duty_cycle = br * state.period / max_br; + state.enabled = state.duty_cycle; + + pwm_apply_state(pwm, &state); } static int lp855x_bl_update_status(struct backlight_device *bl)
--
2.31.1