// SPDX-License-Identifier: GPL-2.0-or-later /* * LED driver for Mediatek MT6323 PMIC * * Copyright (C) 2017 Sean Wang <[email protected]> */ #include <linux/kernel.h> #include <linux/leds.h> #include <linux/mfd/mt6323/registers.h> #include <linux/mfd/mt6397/core.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> /* * Register field for TOP_CKPDN0 to enable * 32K clock common for LED device. */ #define RG_DRV_32K_CK_PDN … #define RG_DRV_32K_CK_PDN_MASK … /* 32K/1M/6M clock common for WLED device */ #define RG_VWLED_1M_CK_PDN … #define RG_VWLED_32K_CK_PDN … #define RG_VWLED_6M_CK_PDN … /* * Register field for TOP_CKPDN2 to enable * individual clock for LED device. */ #define RG_ISINK_CK_PDN(i) … #define RG_ISINK_CK_PDN_MASK(i) … /* * Register field for TOP_CKCON1 to select * clock source. */ #define RG_ISINK_CK_SEL_MASK(i) … #define ISINK_CON(r, i) … /* ISINK_CON0: Register to setup the duty cycle of the blink. */ #define ISINK_DIM_DUTY_MASK … #define ISINK_DIM_DUTY(i) … /* ISINK_CON1: Register to setup the period of the blink. */ #define ISINK_DIM_FSEL_MASK … #define ISINK_DIM_FSEL(i) … /* ISINK_CON2: Register to control the brightness. */ #define ISINK_CH_STEP_SHIFT … #define ISINK_CH_STEP_MASK … #define ISINK_CH_STEP(i) … #define ISINK_SFSTR0_TC_MASK … #define ISINK_SFSTR0_TC(i) … #define ISINK_SFSTR0_EN_MASK … #define ISINK_SFSTR0_EN … /* Register to LED channel enablement. */ #define ISINK_CH_EN_MASK(i) … #define ISINK_CH_EN(i) … #define MAX_SUPPORTED_LEDS … struct mt6323_leds; /** * struct mt6323_led - state container for the LED device * @id: the identifier in MT6323 LED device * @parent: the pointer to MT6323 LED controller * @cdev: LED class device for this LED device * @current_brightness: current state of the LED device */ struct mt6323_led { … }; /** * struct mt6323_regs - register spec for the LED device * @top_ckpdn: Offset to ISINK_CKPDN[0..x] registers * @num_top_ckpdn: Number of ISINK_CKPDN registers * @top_ckcon: Offset to ISINK_CKCON[0..x] registers * @num_top_ckcon: Number of ISINK_CKCON registers * @isink_con: Offset to ISINKx_CON[0..x] registers * @num_isink_con: Number of ISINKx_CON registers * @isink_max_regs: Number of ISINK[0..x] registers * @isink_en_ctrl: Offset to ISINK_EN_CTRL register * @iwled_en_ctrl: Offset to IWLED_EN_CTRL register */ struct mt6323_regs { … }; /** * struct mt6323_hwspec - hardware specific parameters * @max_period: Maximum period for all LEDs * @max_leds: Maximum number of supported LEDs * @max_wleds: Maximum number of WLEDs * @max_brightness: Maximum brightness for all LEDs * @unit_duty: Steps of duty per period */ struct mt6323_hwspec { … }; /** * struct mt6323_data - device specific data * @regs: Register spec for this device * @spec: Hardware specific parameters */ struct mt6323_data { … }; /** * struct mt6323_leds - state container for holding LED controller * of the driver * @dev: the device pointer * @hw: the underlying hardware providing shared * bus for the register operations * @pdata: device specific data * @lock: the lock among process context * @led: the array that contains the state of individual * LED device */ struct mt6323_leds { … }; static int mt6323_led_hw_brightness(struct led_classdev *cdev, enum led_brightness brightness) { … } static int mt6323_led_hw_off(struct led_classdev *cdev) { … } static enum led_brightness mt6323_get_led_hw_brightness(struct led_classdev *cdev) { … } static int mt6323_led_hw_on(struct led_classdev *cdev, enum led_brightness brightness) { … } static int mt6323_led_set_blink(struct led_classdev *cdev, unsigned long *delay_on, unsigned long *delay_off) { … } static int mt6323_led_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { … } static int mtk_wled_hw_on(struct led_classdev *cdev) { … } static int mtk_wled_hw_off(struct led_classdev *cdev) { … } static enum led_brightness mt6323_get_wled_brightness(struct led_classdev *cdev) { … } static int mt6323_wled_set_brightness(struct led_classdev *cdev, enum led_brightness brightness) { … } static int mt6323_led_set_dt_default(struct led_classdev *cdev, struct device_node *np) { … } static int mt6323_led_probe(struct platform_device *pdev) { … } static void mt6323_led_remove(struct platform_device *pdev) { … } static const struct mt6323_regs mt6323_registers = …; static const struct mt6323_regs mt6331_registers = …; static const struct mt6323_regs mt6332_registers = …; static const struct mt6323_hwspec mt6323_spec = …; static const struct mt6323_hwspec mt6332_spec = …; static const struct mt6323_data mt6323_pdata = …; static const struct mt6323_data mt6331_pdata = …; static const struct mt6323_data mt6332_pdata = …; static const struct of_device_id mt6323_led_dt_match[] = …; MODULE_DEVICE_TABLE(of, mt6323_led_dt_match); static struct platform_driver mt6323_led_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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