// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2011 bct electronic GmbH * Copyright 2013 Qtechnology/AS * * Author: Peter Meerwald <[email protected]> * Author: Ricardo Ribalda <[email protected]> * * Based on leds-pca955x.c * * LED driver for the PCA9633 I2C LED driver (7-bit slave address 0x62) * LED driver for the PCA9634/5 I2C LED driver (7-bit slave address set by hw.) * * Note that hardware blinking violates the leds infrastructure driver * interface since the hardware only supports blinking all LEDs with the * same delay_on/delay_off rates. That is, only the LEDs that are set to * blink will actually blink but all LEDs that are set to blink will blink * in identical fashion. The delay_on/delay_off values of the last LED * that is set to blink will be used for all of the blinking LEDs. * Hardware blinking is disabled by default but can be enabled by setting * the 'blink_type' member in the platform_data struct to 'PCA963X_HW_BLINK' * or by adding the 'nxp,hw-blink' property to the DTS. */ #include <linux/module.h> #include <linux/delay.h> #include <linux/string.h> #include <linux/ctype.h> #include <linux/leds.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/property.h> #include <linux/slab.h> #include <linux/of.h> /* LED select registers determine the source that drives LED outputs */ #define PCA963X_LED_OFF … #define PCA963X_LED_ON … #define PCA963X_LED_PWM … #define PCA963X_LED_GRP_PWM … #define PCA963X_MODE1_SLEEP … #define PCA963X_MODE2_OUTDRV … #define PCA963X_MODE2_INVRT … #define PCA963X_MODE2_DMBLNK … #define PCA963X_MODE1 … #define PCA963X_MODE2 … #define PCA963X_PWM_BASE … enum pca963x_type { … }; struct pca963x_chipdef { … }; static struct pca963x_chipdef pca963x_chipdefs[] = …; /* Total blink period in milliseconds */ #define PCA963X_BLINK_PERIOD_MIN … #define PCA963X_BLINK_PERIOD_MAX … static const struct i2c_device_id pca963x_id[] = …; MODULE_DEVICE_TABLE(i2c, pca963x_id); struct pca963x; struct pca963x_led { … }; struct pca963x { … }; static int pca963x_brightness(struct pca963x_led *led, enum led_brightness brightness) { … } static void pca963x_blink(struct pca963x_led *led) { … } static int pca963x_power_state(struct pca963x_led *led) { … } static int pca963x_led_set(struct led_classdev *led_cdev, enum led_brightness value) { … } static unsigned int pca963x_period_scale(struct pca963x_led *led, unsigned int val) { … } static int pca963x_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off) { … } static int pca963x_register_leds(struct i2c_client *client, struct pca963x *chip) { … } static int pca963x_suspend(struct device *dev) { … } static int pca963x_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(pca963x_pm, pca963x_suspend, pca963x_resume); static const struct of_device_id of_pca963x_match[] = …; MODULE_DEVICE_TABLE(of, of_pca963x_match); static int pca963x_probe(struct i2c_client *client) { … } static struct i2c_driver pca963x_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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