// SPDX-License-Identifier: GPL-2.0 /* * Driver for LEDs connected to the Intel Cherry Trail Whiskey Cove PMIC * * Copyright 2019 Yauhen Kharuzhy <[email protected]> * Copyright 2023 Hans de Goede <[email protected]> * * Register info comes from the Lenovo Yoga Book Android opensource code * available from Lenovo. File lenovo_yb1_x90f_l_osc_201803.7z path in the 7z: * YB1_source_code/kernel/cht/drivers/misc/charger_gp_led.c */ #include <linux/kernel.h> #include <linux/leds.h> #include <linux/mfd/intel_soc_pmic.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/suspend.h> #define CHT_WC_LED1_CTRL … #define CHT_WC_LED1_FSM … #define CHT_WC_LED1_PWM … #define CHT_WC_LED2_CTRL … #define CHT_WC_LED2_FSM … #define CHT_WC_LED2_PWM … #define CHT_WC_LED1_SWCTL … #define CHT_WC_LED1_ON … #define CHT_WC_LED2_ON … #define CHT_WC_LED_I_MA2_5 … #define CHT_WC_LED_I_MASK … #define CHT_WC_LED_F_1_4_HZ … #define CHT_WC_LED_F_1_2_HZ … #define CHT_WC_LED_F_1_HZ … #define CHT_WC_LED_F_2_HZ … #define CHT_WC_LED_F_MASK … #define CHT_WC_LED_EFF_OFF … #define CHT_WC_LED_EFF_ON … #define CHT_WC_LED_EFF_BLINKING … #define CHT_WC_LED_EFF_BREATHING … #define CHT_WC_LED_EFF_MASK … #define CHT_WC_LED_COUNT … struct cht_wc_led_regs { … }; struct cht_wc_led_saved_regs { … }; struct cht_wc_led { … }; struct cht_wc_leds { … }; static const struct cht_wc_led_regs cht_wc_led_regs[CHT_WC_LED_COUNT] = …; static const char * const cht_wc_leds_names[CHT_WC_LED_COUNT] = …; static int cht_wc_leds_brightness_set(struct led_classdev *cdev, enum led_brightness value) { … } static enum led_brightness cht_wc_leds_brightness_get(struct led_classdev *cdev) { … } /* Return blinking period for given CTRL reg value */ static unsigned long cht_wc_leds_get_period(int ctrl) { … } /* * Find suitable hardware blink mode for given period. * period < 750 ms - select 2 HZ * 750 ms <= period < 1500 ms - select 1 HZ * 1500 ms <= period < 3000 ms - select 1/2 HZ * 3000 ms <= period < 5000 ms - select 1/4 HZ * 5000 ms <= period - return -1 */ static int cht_wc_leds_find_freq(unsigned long period) { … } static int cht_wc_leds_set_effect(struct led_classdev *cdev, unsigned long *delay_on, unsigned long *delay_off, u8 effect) { … } static int cht_wc_leds_blink_set(struct led_classdev *cdev, unsigned long *delay_on, unsigned long *delay_off) { … } static int cht_wc_leds_pattern_set(struct led_classdev *cdev, struct led_pattern *pattern, u32 len, int repeat) { … } static int cht_wc_leds_pattern_clear(struct led_classdev *cdev) { … } static int cht_wc_led_save_regs(struct cht_wc_led *led, struct cht_wc_led_saved_regs *saved_regs) { … } static void cht_wc_led_restore_regs(struct cht_wc_led *led, const struct cht_wc_led_saved_regs *saved_regs) { … } static int cht_wc_leds_probe(struct platform_device *pdev) { … } static void cht_wc_leds_remove(struct platform_device *pdev) { … } static void cht_wc_leds_disable(struct platform_device *pdev) { … } /* On suspend save current settings and turn LEDs off */ static int cht_wc_leds_suspend(struct device *dev) { … } /* On resume restore the saved settings */ static int cht_wc_leds_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(cht_wc_leds_pm, cht_wc_leds_suspend, cht_wc_leds_resume); static struct platform_driver cht_wc_leds_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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