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Fri, 05 Jun 2026 21:58:36 -0700 (PDT) From: Svyatoslav Ryhel To: Lee Jones , Daniel Thompson , Jingoo Han , Pavel Machek , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Helge Deller , Svyatoslav Ryhel Cc: Johan Hovold , dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [PATCH v4 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions Date: Sat, 6 Jun 2026 07:57:35 +0300 Message-ID: <20260606045738.21050-12-clamor95@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260606045738.21050-1-clamor95@gmail.com> References: <20260606045738.21050-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Simplify the sysfs logic of properties by switching to macros and proper regmap helpers. Signed-off-by: Svyatoslav Ryhel Reviewed-by: Daniel Thompson (RISCstar) --- drivers/video/backlight/lm3533_bl.c | 58 ++++++++++------------------- 1 file changed, 20 insertions(+), 38 deletions(-) diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c index e91c598342ad..9ad7ea1bbbcc 100644 --- a/drivers/video/backlight/lm3533_bl.c +++ b/drivers/video/backlight/lm3533_bl.c @@ -23,6 +23,8 @@ #define LM3533_BL_MAX_BRIGHTNESS 255 #define LM3533_REG_CTRLBANK_AB_BCONF 0x1a +#define CTRLBANK_AB_BCONF_ALS(n) BIT(2 * (n)) +#define CTRLBANK_AB_BCONF_MODE(n) BIT(2 * (n) + 1) struct lm3533_bl { @@ -85,88 +87,68 @@ static ssize_t show_als_channel(struct device *dev, return scnprintf(buf, PAGE_SIZE, "%u\n", channel); } -static ssize_t show_als_en(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t show_als_en(struct device *dev, struct device_attribute *attr, + char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); - u32 val; - u8 mask; - bool enable; int ret; - ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val); + ret = regmap_test_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, + CTRLBANK_AB_BCONF_ALS(ctrlbank)); if (ret) return ret; - mask = 1 << (2 * ctrlbank); - enable = val & mask; - - return scnprintf(buf, PAGE_SIZE, "%d\n", enable); + return scnprintf(buf, PAGE_SIZE, "%d\n", ret); } -static ssize_t store_als_en(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static ssize_t store_als_en(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) { struct lm3533_bl *bl = dev_get_drvdata(dev); int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); int enable; - u8 mask; int ret; if (kstrtoint(buf, 0, &enable)) return -EINVAL; - mask = 1 << (2 * ctrlbank); - ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, - mask, enable); + CTRLBANK_AB_BCONF_ALS(ctrlbank), enable); if (ret) return ret; return len; } -static ssize_t show_linear(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t show_linear(struct device *dev, struct device_attribute *attr, + char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); - u32 val; - u8 mask; - int linear; + int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); int ret; - ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val); + ret = regmap_test_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, + CTRLBANK_AB_BCONF_MODE(ctrlbank)); if (ret) return ret; - mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); - - if (val & mask) - linear = 1; - else - linear = 0; - - return scnprintf(buf, PAGE_SIZE, "%x\n", linear); + return scnprintf(buf, PAGE_SIZE, "%x\n", ret); } -static ssize_t store_linear(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) +static ssize_t store_linear(struct device *dev, struct device_attribute *attr, + const char *buf, size_t len) { struct lm3533_bl *bl = dev_get_drvdata(dev); + int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); unsigned long linear; - u8 mask; int ret; if (kstrtoul(buf, 0, &linear)) return -EINVAL; - mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); - ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, - mask, linear); + CTRLBANK_AB_BCONF_MODE(ctrlbank), linear); if (ret) return ret; -- 2.53.0