From ac219bf3c9bdf9200767e8c98a56ad42c75e5cd5 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 27 Jun 2020 00:40:11 +0200 Subject: [PATCH] leds: lp55xx: Convert to use GPIO descriptors The LP55xx driver is already using the of_gpio() functions to pick a global GPIO number for "enable" from the device tree and request the line. Simplify it by just using a GPIO descriptor. Make sure to keep the enable GPIO line optional, change the naming from "lp5523_enable" to "LP55xx enable" to reflect that this is used on all LP55xx LED drivers. Cc: Milo Kim Signed-off-by: Linus Walleij Signed-off-by: Pavel Machek --- drivers/leds/leds-lp55xx-common.c | 27 +++++++++++---------------- include/linux/platform_data/leds-lp55xx.h | 6 ++++-- 2 files changed, 15 insertions(+), 18 deletions(-) diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c index 44ced02..1354965 100644 --- a/drivers/leds/leds-lp55xx-common.c +++ b/drivers/leds/leds-lp55xx-common.c @@ -17,8 +17,7 @@ #include #include #include -#include -#include +#include #include "leds-lp55xx-common.h" @@ -395,18 +394,11 @@ int lp55xx_init_device(struct lp55xx_chip *chip) if (!pdata || !cfg) return -EINVAL; - if (gpio_is_valid(pdata->enable_gpio)) { - ret = devm_gpio_request_one(dev, pdata->enable_gpio, - GPIOF_DIR_OUT, "lp5523_enable"); - if (ret < 0) { - dev_err(dev, "could not acquire enable gpio (err=%d)\n", - ret); - goto err; - } - - gpio_set_value(pdata->enable_gpio, 0); + if (pdata->enable_gpiod) { + gpiod_set_consumer_name(pdata->enable_gpiod, "LP55xx enable"); + gpiod_set_value(pdata->enable_gpiod, 0); usleep_range(1000, 2000); /* Keep enable down at least 1ms */ - gpio_set_value(pdata->enable_gpio, 1); + gpiod_set_value(pdata->enable_gpiod, 1); usleep_range(1000, 2000); /* 500us abs min. */ } @@ -447,8 +439,8 @@ void lp55xx_deinit_device(struct lp55xx_chip *chip) if (chip->clk) clk_disable_unprepare(chip->clk); - if (gpio_is_valid(pdata->enable_gpio)) - gpio_set_value(pdata->enable_gpio, 0); + if (pdata->enable_gpiod) + gpiod_set_value(pdata->enable_gpiod, 0); } EXPORT_SYMBOL_GPL(lp55xx_deinit_device); @@ -579,7 +571,10 @@ struct lp55xx_platform_data *lp55xx_of_populate_pdata(struct device *dev, of_property_read_string(np, "label", &pdata->label); of_property_read_u8(np, "clock-mode", &pdata->clock_mode); - pdata->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0); + pdata->enable_gpiod = devm_gpiod_get_optional(dev, "enable", + GPIOD_ASIS); + if (IS_ERR(pdata->enable_gpiod)) + return ERR_CAST(pdata->enable_gpiod); /* LP8501 specific */ of_property_read_u8(np, "pwr-sel", (u8 *)&pdata->pwr_sel); diff --git a/include/linux/platform_data/leds-lp55xx.h b/include/linux/platform_data/leds-lp55xx.h index 96a7871..00492d6 100644 --- a/include/linux/platform_data/leds-lp55xx.h +++ b/include/linux/platform_data/leds-lp55xx.h @@ -12,6 +12,8 @@ #ifndef _LEDS_LP55XX_H #define _LEDS_LP55XX_H +#include + /* Clock configuration */ #define LP55XX_CLOCK_AUTO 0 #define LP55XX_CLOCK_INT 1 @@ -49,7 +51,7 @@ enum lp8501_pwr_sel { * @clock_mode : Input clock mode. LP55XX_CLOCK_AUTO or _INT or _EXT * @setup_resources : Platform specific function before enabling the chip * @release_resources : Platform specific function after disabling the chip - * @enable : EN pin control by platform side + * @enable_gpiod : enable GPIO descriptor * @patterns : Predefined pattern data for RGB channels * @num_patterns : Number of patterns * @update_config : Value of CONFIG register @@ -65,7 +67,7 @@ struct lp55xx_platform_data { u8 clock_mode; /* optional enable GPIO */ - int enable_gpio; + struct gpio_desc *enable_gpiod; /* Predefined pattern data */ struct lp55xx_predef_pattern *patterns; -- 2.7.4