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[83.11.222.198]) by smtp.gmail.com with ESMTPSA id g26-20020aa7c85a000000b0050690bc07a3sm19824edt.18.2023.05.19.11.09.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 May 2023 11:09:23 -0700 (PDT) From: Artur Weber To: Lee Jones , Rob Herring , Krzysztof Kozlowski Cc: Daniel Thompson , Jingoo Han , Pavel Machek , Andy Gross , Bjorn Andersson , Konrad Dybcio , Thierry Reding , Jonathan Hunter , Helge Deller , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Luca Weiss , Artur Weber , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-pwm@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht Subject: [PATCH v2 2/4] video: backlight: lp855x: get PWM for PWM mode during probe Date: Fri, 19 May 2023 20:07:26 +0200 Message-Id: <20230519180728.2281-3-aweber.kernel@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230519180728.2281-1-aweber.kernel@gmail.com> References: <20230519180728.2281-1-aweber.kernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Also deprecate the pwm-period DT property, as it is now redundant (pwms property already contains period value). Signed-off-by: Artur Weber Reviewed-by: Daniel Thompson --- drivers/video/backlight/lp855x_bl.c | 48 ++++++++++++++++------------- 1 file changed, 26 insertions(+), 22 deletions(-) diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c index a57c9ef3b1cc..0ef850dd8e84 100644 --- a/drivers/video/backlight/lp855x_bl.c +++ b/drivers/video/backlight/lp855x_bl.c @@ -218,23 +218,10 @@ static int lp855x_configure(struct lp855x *lp) 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) {