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31 May 2024 10:08:49 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 7EAE0136; Fri, 31 May 2024 20:08:46 +0300 (EEST) From: Andy Shevchenko To: Jonathan Cameron , Andy Shevchenko , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Lee Jones , linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-leds@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Cc: Jonathan Cameron , Lars-Peter Clausen , Pavel Machek , Daniel Thompson , Jingoo Han , Helge Deller , Johan Hovold Subject: [PATCH v1 1/4] backlight: lm3533_bl: Remove the driver Date: Fri, 31 May 2024 19:56:13 +0300 Message-ID: <20240531170844.1595468-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.43.0.rc1.1336.g36b5255a03ac In-Reply-To: <20240531170844.1595468-1-andriy.shevchenko@linux.intel.com> References: <20240531170844.1595468-1-andriy.shevchenko@linux.intel.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 The driver has no in kernel users and requires a board file to be instantiated. Remove basically a dead code. If ever needed, it can be reinstantiated and converted to one that uses firmware node interfaces. Signed-off-by: Andy Shevchenko --- drivers/video/backlight/Kconfig | 11 - drivers/video/backlight/Makefile | 1 - drivers/video/backlight/lm3533_bl.c | 399 ---------------------------- 3 files changed, 411 deletions(-) delete mode 100644 drivers/video/backlight/lm3533_bl.c diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 230bca07b09d..91d6618d69a0 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -198,17 +198,6 @@ config BACKLIGHT_KTZ8866 Say Y to enable the backlight driver for the Kinetic KTZ8866 found in Xiaomi Mi Pad 5 series. -config BACKLIGHT_LM3533 - tristate "Backlight Driver for LM3533" - depends on MFD_LM3533 - help - Say Y to enable the backlight driver for National Semiconductor / TI - LM3533 Lighting Power chips. - - The backlights can be controlled directly, through PWM input, or by - the ambient-light-sensor interface. The chip supports 256 brightness - levels. - config BACKLIGHT_LOCOMO tristate "Sharp LOCOMO LCD/Backlight Driver" depends on SHARP_LOCOMO diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 8d2cb252042d..fc75b9f059f9 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -36,7 +36,6 @@ obj-$(CONFIG_BACKLIGHT_IPAQ_MICRO) += ipaq_micro_bl.o obj-$(CONFIG_BACKLIGHT_KTD253) += ktd253-backlight.o obj-$(CONFIG_BACKLIGHT_KTD2801) += ktd2801-backlight.o obj-$(CONFIG_BACKLIGHT_KTZ8866) += ktz8866.o -obj-$(CONFIG_BACKLIGHT_LM3533) += lm3533_bl.o obj-$(CONFIG_BACKLIGHT_LM3630A) += lm3630a_bl.o obj-$(CONFIG_BACKLIGHT_LM3639) += lm3639_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c deleted file mode 100644 index 3e10d480cb7f..000000000000 --- a/drivers/video/backlight/lm3533_bl.c +++ /dev/null @@ -1,399 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * lm3533-bl.c -- LM3533 Backlight driver - * - * Copyright (C) 2011-2012 Texas Instruments - * - * Author: Johan Hovold - */ - -#include -#include -#include -#include -#include -#include - -#include - - -#define LM3533_HVCTRLBANK_COUNT 2 -#define LM3533_BL_MAX_BRIGHTNESS 255 - -#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a - - -struct lm3533_bl { - struct lm3533 *lm3533; - struct lm3533_ctrlbank cb; - struct backlight_device *bd; - int id; -}; - - -static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl) -{ - return bl->id; -} - -static int lm3533_bl_update_status(struct backlight_device *bd) -{ - struct lm3533_bl *bl = bl_get_data(bd); - - return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd)); -} - -static int lm3533_bl_get_brightness(struct backlight_device *bd) -{ - struct lm3533_bl *bl = bl_get_data(bd); - u8 val; - int ret; - - ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val); - if (ret) - return ret; - - return val; -} - -static const struct backlight_ops lm3533_bl_ops = { - .get_brightness = lm3533_bl_get_brightness, - .update_status = lm3533_bl_update_status, -}; - -static ssize_t show_id(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - - return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id); -} - -static ssize_t show_als_channel(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - unsigned channel = lm3533_bl_get_ctrlbank_id(bl); - - return scnprintf(buf, PAGE_SIZE, "%u\n", channel); -} - -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); - u8 val; - u8 mask; - bool enable; - int ret; - - ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); - if (ret) - return ret; - - mask = 1 << (2 * ctrlbank); - enable = val & mask; - - return scnprintf(buf, PAGE_SIZE, "%d\n", enable); -} - -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 val; - u8 mask; - int ret; - - if (kstrtoint(buf, 0, &enable)) - return -EINVAL; - - mask = 1 << (2 * ctrlbank); - - if (enable) - val = mask; - else - val = 0; - - ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, - mask); - if (ret) - return ret; - - return len; -} - -static ssize_t show_linear(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - u8 val; - u8 mask; - int linear; - int ret; - - ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); - 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); -} - -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); - unsigned long linear; - u8 mask; - u8 val; - int ret; - - if (kstrtoul(buf, 0, &linear)) - return -EINVAL; - - mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); - - if (linear) - val = mask; - else - val = 0; - - ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, - mask); - if (ret) - return ret; - - return len; -} - -static ssize_t show_pwm(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - u8 val; - int ret; - - ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val); - if (ret) - return ret; - - return scnprintf(buf, PAGE_SIZE, "%u\n", val); -} - -static ssize_t store_pwm(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t len) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - u8 val; - int ret; - - if (kstrtou8(buf, 0, &val)) - return -EINVAL; - - ret = lm3533_ctrlbank_set_pwm(&bl->cb, val); - if (ret) - return ret; - - return len; -} - -static LM3533_ATTR_RO(als_channel); -static LM3533_ATTR_RW(als_en); -static LM3533_ATTR_RO(id); -static LM3533_ATTR_RW(linear); -static LM3533_ATTR_RW(pwm); - -static struct attribute *lm3533_bl_attributes[] = { - &dev_attr_als_channel.attr, - &dev_attr_als_en.attr, - &dev_attr_id.attr, - &dev_attr_linear.attr, - &dev_attr_pwm.attr, - NULL, -}; - -static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj, - struct attribute *attr, int n) -{ - struct device *dev = kobj_to_dev(kobj); - struct lm3533_bl *bl = dev_get_drvdata(dev); - umode_t mode = attr->mode; - - if (attr == &dev_attr_als_channel.attr || - attr == &dev_attr_als_en.attr) { - if (!bl->lm3533->have_als) - mode = 0; - } - - return mode; -}; - -static struct attribute_group lm3533_bl_attribute_group = { - .is_visible = lm3533_bl_attr_is_visible, - .attrs = lm3533_bl_attributes -}; - -static int lm3533_bl_setup(struct lm3533_bl *bl, - struct lm3533_bl_platform_data *pdata) -{ - int ret; - - ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current); - if (ret) - return ret; - - return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm); -} - -static int lm3533_bl_probe(struct platform_device *pdev) -{ - struct lm3533 *lm3533; - struct lm3533_bl_platform_data *pdata; - struct lm3533_bl *bl; - struct backlight_device *bd; - struct backlight_properties props; - int ret; - - dev_dbg(&pdev->dev, "%s\n", __func__); - - lm3533 = dev_get_drvdata(pdev->dev.parent); - if (!lm3533) - return -EINVAL; - - pdata = dev_get_platdata(&pdev->dev); - if (!pdata) { - dev_err(&pdev->dev, "no platform data\n"); - return -EINVAL; - } - - if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) { - dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id); - return -EINVAL; - } - - bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL); - if (!bl) - return -ENOMEM; - - bl->lm3533 = lm3533; - bl->id = pdev->id; - - bl->cb.lm3533 = lm3533; - bl->cb.id = lm3533_bl_get_ctrlbank_id(bl); - bl->cb.dev = NULL; /* until registered */ - - memset(&props, 0, sizeof(props)); - props.type = BACKLIGHT_RAW; - props.max_brightness = LM3533_BL_MAX_BRIGHTNESS; - props.brightness = pdata->default_brightness; - bd = devm_backlight_device_register(&pdev->dev, pdata->name, - pdev->dev.parent, bl, &lm3533_bl_ops, - &props); - if (IS_ERR(bd)) { - dev_err(&pdev->dev, "failed to register backlight device\n"); - return PTR_ERR(bd); - } - - bl->bd = bd; - bl->cb.dev = &bl->bd->dev; - - platform_set_drvdata(pdev, bl); - - ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group); - if (ret < 0) { - dev_err(&pdev->dev, "failed to create sysfs attributes\n"); - return ret; - } - - backlight_update_status(bd); - - ret = lm3533_bl_setup(bl, pdata); - if (ret) - goto err_sysfs_remove; - - ret = lm3533_ctrlbank_enable(&bl->cb); - if (ret) - goto err_sysfs_remove; - - return 0; - -err_sysfs_remove: - sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); - - return ret; -} - -static void lm3533_bl_remove(struct platform_device *pdev) -{ - struct lm3533_bl *bl = platform_get_drvdata(pdev); - struct backlight_device *bd = bl->bd; - - dev_dbg(&bd->dev, "%s\n", __func__); - - bd->props.power = FB_BLANK_POWERDOWN; - bd->props.brightness = 0; - - lm3533_ctrlbank_disable(&bl->cb); - sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); -} - -#ifdef CONFIG_PM_SLEEP -static int lm3533_bl_suspend(struct device *dev) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - - dev_dbg(dev, "%s\n", __func__); - - return lm3533_ctrlbank_disable(&bl->cb); -} - -static int lm3533_bl_resume(struct device *dev) -{ - struct lm3533_bl *bl = dev_get_drvdata(dev); - - dev_dbg(dev, "%s\n", __func__); - - return lm3533_ctrlbank_enable(&bl->cb); -} -#endif - -static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume); - -static void lm3533_bl_shutdown(struct platform_device *pdev) -{ - struct lm3533_bl *bl = platform_get_drvdata(pdev); - - dev_dbg(&pdev->dev, "%s\n", __func__); - - lm3533_ctrlbank_disable(&bl->cb); -} - -static struct platform_driver lm3533_bl_driver = { - .driver = { - .name = "lm3533-backlight", - .pm = &lm3533_bl_pm_ops, - }, - .probe = lm3533_bl_probe, - .remove_new = lm3533_bl_remove, - .shutdown = lm3533_bl_shutdown, -}; -module_platform_driver(lm3533_bl_driver); - -MODULE_AUTHOR("Johan Hovold "); -MODULE_DESCRIPTION("LM3533 Backlight driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:lm3533-backlight"); -- 2.43.0.rc1.1336.g36b5255a03ac