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801 lines
20 KiB
801 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* leds-bd2802.c - RGB LED Driver |
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* |
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* Copyright (C) 2009 Samsung Electronics |
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* Kim Kyuwon <[email protected]> |
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* |
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* Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf |
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*/ |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/delay.h> |
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#include <linux/leds.h> |
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#include <linux/leds-bd2802.h> |
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#include <linux/slab.h> |
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#include <linux/pm.h> |
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#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0)) |
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#define BD2802_LED_OFFSET 0xa |
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#define BD2802_COLOR_OFFSET 0x3 |
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#define BD2802_REG_CLKSETUP 0x00 |
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#define BD2802_REG_CONTROL 0x01 |
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#define BD2802_REG_HOURSETUP 0x02 |
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#define BD2802_REG_CURRENT1SETUP 0x03 |
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#define BD2802_REG_CURRENT2SETUP 0x04 |
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#define BD2802_REG_WAVEPATTERN 0x05 |
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#define BD2802_CURRENT_032 0x10 /* 3.2mA */ |
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#define BD2802_CURRENT_000 0x00 /* 0.0mA */ |
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#define BD2802_PATTERN_FULL 0x07 |
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#define BD2802_PATTERN_HALF 0x03 |
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enum led_ids { |
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LED1, |
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LED2, |
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LED_NUM, |
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}; |
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enum led_colors { |
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RED, |
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GREEN, |
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BLUE, |
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}; |
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enum led_bits { |
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BD2802_OFF, |
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BD2802_BLINK, |
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BD2802_ON, |
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}; |
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/* |
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* State '0' : 'off' |
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* State '1' : 'blink' |
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* State '2' : 'on'. |
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*/ |
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struct led_state { |
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unsigned r:2; |
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unsigned g:2; |
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unsigned b:2; |
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}; |
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struct bd2802_led { |
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struct bd2802_led_platform_data *pdata; |
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struct i2c_client *client; |
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struct gpio_desc *reset; |
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struct rw_semaphore rwsem; |
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struct led_state led[2]; |
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/* |
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* Making led_classdev as array is not recommended, because array |
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* members prevent using 'container_of' macro. So repetitive works |
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* are needed. |
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*/ |
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struct led_classdev cdev_led1r; |
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struct led_classdev cdev_led1g; |
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struct led_classdev cdev_led1b; |
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struct led_classdev cdev_led2r; |
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struct led_classdev cdev_led2g; |
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struct led_classdev cdev_led2b; |
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/* |
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* Advanced Configuration Function(ADF) mode: |
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* In ADF mode, user can set registers of BD2802GU directly, |
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* therefore BD2802GU doesn't enter reset state. |
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*/ |
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int adf_on; |
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enum led_ids led_id; |
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enum led_colors color; |
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enum led_bits state; |
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/* General attributes of RGB LEDs */ |
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int wave_pattern; |
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int rgb_current; |
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}; |
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/*--------------------------------------------------------------*/ |
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/* BD2802GU helper functions */ |
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/*--------------------------------------------------------------*/ |
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static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color) |
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{ |
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switch (color) { |
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case RED: |
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return !led->led[id].r; |
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case GREEN: |
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return !led->led[id].g; |
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case BLUE: |
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return !led->led[id].b; |
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default: |
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dev_err(&led->client->dev, "%s: Invalid color\n", __func__); |
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return -EINVAL; |
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} |
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} |
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static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id) |
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{ |
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if (led->led[id].r || led->led[id].g || led->led[id].b) |
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return 0; |
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return 1; |
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} |
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static inline int bd2802_is_all_off(struct bd2802_led *led) |
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{ |
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int i; |
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for (i = 0; i < LED_NUM; i++) |
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if (!bd2802_is_led_off(led, i)) |
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return 0; |
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return 1; |
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} |
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static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color) |
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{ |
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return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET; |
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} |
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static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color, |
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u8 reg_offset) |
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{ |
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return reg_offset + bd2802_get_base_offset(id, color); |
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} |
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/*--------------------------------------------------------------*/ |
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/* BD2802GU core functions */ |
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/*--------------------------------------------------------------*/ |
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static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val) |
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{ |
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int ret = i2c_smbus_write_byte_data(client, reg, val); |
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if (ret >= 0) |
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return 0; |
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dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n", |
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__func__, reg, val, ret); |
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return ret; |
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} |
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static void bd2802_update_state(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color, enum led_bits led_bit) |
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{ |
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int i; |
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u8 value; |
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for (i = 0; i < LED_NUM; i++) { |
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if (i == id) { |
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switch (color) { |
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case RED: |
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led->led[i].r = led_bit; |
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break; |
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case GREEN: |
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led->led[i].g = led_bit; |
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break; |
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case BLUE: |
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led->led[i].b = led_bit; |
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break; |
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default: |
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dev_err(&led->client->dev, |
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"%s: Invalid color\n", __func__); |
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return; |
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} |
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} |
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} |
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if (led_bit == BD2802_BLINK || led_bit == BD2802_ON) |
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return; |
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if (!bd2802_is_led_off(led, id)) |
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return; |
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if (bd2802_is_all_off(led) && !led->adf_on) { |
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gpiod_set_value(led->reset, 1); |
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return; |
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} |
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/* |
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* In this case, other led is turned on, and current led is turned |
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* off. So set RGB LED Control register to stop the current RGB LED |
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*/ |
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value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1); |
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bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); |
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} |
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static void bd2802_configure(struct bd2802_led *led) |
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{ |
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struct bd2802_led_platform_data *pdata = led->pdata; |
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u8 reg; |
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reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP); |
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bd2802_write_byte(led->client, reg, pdata->rgb_time); |
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reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP); |
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bd2802_write_byte(led->client, reg, pdata->rgb_time); |
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} |
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static void bd2802_reset_cancel(struct bd2802_led *led) |
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{ |
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gpiod_set_value(led->reset, 0); |
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udelay(100); |
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bd2802_configure(led); |
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} |
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static void bd2802_enable(struct bd2802_led *led, enum led_ids id) |
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{ |
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enum led_ids other_led = (id == LED1) ? LED2 : LED1; |
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u8 value, other_led_on; |
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other_led_on = !bd2802_is_led_off(led, other_led); |
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if (id == LED1) |
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value = LED_CTL(other_led_on, 1); |
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else |
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value = LED_CTL(1 , other_led_on); |
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bd2802_write_byte(led->client, BD2802_REG_CONTROL, value); |
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} |
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static void bd2802_set_on(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color) |
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{ |
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u8 reg; |
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if (bd2802_is_all_off(led) && !led->adf_on) |
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bd2802_reset_cancel(led); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); |
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bd2802_write_byte(led->client, reg, led->rgb_current); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); |
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); |
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bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL); |
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bd2802_enable(led, id); |
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bd2802_update_state(led, id, color, BD2802_ON); |
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} |
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static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color) |
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{ |
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u8 reg; |
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if (bd2802_is_all_off(led) && !led->adf_on) |
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bd2802_reset_cancel(led); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); |
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); |
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bd2802_write_byte(led->client, reg, led->rgb_current); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN); |
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bd2802_write_byte(led->client, reg, led->wave_pattern); |
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bd2802_enable(led, id); |
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bd2802_update_state(led, id, color, BD2802_BLINK); |
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} |
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static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color, enum led_bits led_bit) |
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{ |
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if (led_bit == BD2802_OFF) { |
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dev_err(&led->client->dev, |
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"Only 'blink' and 'on' are allowed\n"); |
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return; |
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} |
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if (led_bit == BD2802_BLINK) |
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bd2802_set_blink(led, id, color); |
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else |
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bd2802_set_on(led, id, color); |
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} |
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static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id, |
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enum led_colors color) |
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{ |
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u8 reg; |
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if (bd2802_is_rgb_off(led, id, color)) |
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return; |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP); |
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); |
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reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP); |
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bd2802_write_byte(led->client, reg, BD2802_CURRENT_000); |
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bd2802_update_state(led, id, color, BD2802_OFF); |
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} |
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#define BD2802_SET_REGISTER(reg_addr, reg_name) \ |
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static ssize_t bd2802_store_reg##reg_addr(struct device *dev, \ |
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struct device_attribute *attr, const char *buf, size_t count) \ |
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{ \ |
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ |
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unsigned long val; \ |
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int ret; \ |
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if (!count) \ |
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return -EINVAL; \ |
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ret = kstrtoul(buf, 16, &val); \ |
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if (ret) \ |
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return ret; \ |
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down_write(&led->rwsem); \ |
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bd2802_write_byte(led->client, reg_addr, (u8) val); \ |
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up_write(&led->rwsem); \ |
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return count; \ |
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} \ |
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static struct device_attribute bd2802_reg##reg_addr##_attr = { \ |
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.attr = {.name = reg_name, .mode = 0644}, \ |
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.store = bd2802_store_reg##reg_addr, \ |
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}; |
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BD2802_SET_REGISTER(0x00, "0x00"); |
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BD2802_SET_REGISTER(0x01, "0x01"); |
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BD2802_SET_REGISTER(0x02, "0x02"); |
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BD2802_SET_REGISTER(0x03, "0x03"); |
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BD2802_SET_REGISTER(0x04, "0x04"); |
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BD2802_SET_REGISTER(0x05, "0x05"); |
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BD2802_SET_REGISTER(0x06, "0x06"); |
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BD2802_SET_REGISTER(0x07, "0x07"); |
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BD2802_SET_REGISTER(0x08, "0x08"); |
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BD2802_SET_REGISTER(0x09, "0x09"); |
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BD2802_SET_REGISTER(0x0a, "0x0a"); |
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BD2802_SET_REGISTER(0x0b, "0x0b"); |
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BD2802_SET_REGISTER(0x0c, "0x0c"); |
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BD2802_SET_REGISTER(0x0d, "0x0d"); |
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BD2802_SET_REGISTER(0x0e, "0x0e"); |
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BD2802_SET_REGISTER(0x0f, "0x0f"); |
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BD2802_SET_REGISTER(0x10, "0x10"); |
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BD2802_SET_REGISTER(0x11, "0x11"); |
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BD2802_SET_REGISTER(0x12, "0x12"); |
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BD2802_SET_REGISTER(0x13, "0x13"); |
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BD2802_SET_REGISTER(0x14, "0x14"); |
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BD2802_SET_REGISTER(0x15, "0x15"); |
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static struct device_attribute *bd2802_addr_attributes[] = { |
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&bd2802_reg0x00_attr, |
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&bd2802_reg0x01_attr, |
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&bd2802_reg0x02_attr, |
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&bd2802_reg0x03_attr, |
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&bd2802_reg0x04_attr, |
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&bd2802_reg0x05_attr, |
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&bd2802_reg0x06_attr, |
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&bd2802_reg0x07_attr, |
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&bd2802_reg0x08_attr, |
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&bd2802_reg0x09_attr, |
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&bd2802_reg0x0a_attr, |
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&bd2802_reg0x0b_attr, |
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&bd2802_reg0x0c_attr, |
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&bd2802_reg0x0d_attr, |
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&bd2802_reg0x0e_attr, |
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&bd2802_reg0x0f_attr, |
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&bd2802_reg0x10_attr, |
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&bd2802_reg0x11_attr, |
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&bd2802_reg0x12_attr, |
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&bd2802_reg0x13_attr, |
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&bd2802_reg0x14_attr, |
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&bd2802_reg0x15_attr, |
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}; |
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static void bd2802_enable_adv_conf(struct bd2802_led *led) |
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{ |
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int i, ret; |
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for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) { |
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ret = device_create_file(&led->client->dev, |
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bd2802_addr_attributes[i]); |
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if (ret) { |
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dev_err(&led->client->dev, "failed: sysfs file %s\n", |
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bd2802_addr_attributes[i]->attr.name); |
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goto failed_remove_files; |
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} |
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} |
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if (bd2802_is_all_off(led)) |
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bd2802_reset_cancel(led); |
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led->adf_on = 1; |
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return; |
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failed_remove_files: |
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for (i--; i >= 0; i--) |
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device_remove_file(&led->client->dev, |
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bd2802_addr_attributes[i]); |
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} |
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static void bd2802_disable_adv_conf(struct bd2802_led *led) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) |
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device_remove_file(&led->client->dev, |
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bd2802_addr_attributes[i]); |
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if (bd2802_is_all_off(led)) |
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gpiod_set_value(led->reset, 1); |
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led->adf_on = 0; |
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} |
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static ssize_t bd2802_show_adv_conf(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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ssize_t ret; |
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down_read(&led->rwsem); |
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if (led->adf_on) |
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ret = sprintf(buf, "on\n"); |
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else |
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ret = sprintf(buf, "off\n"); |
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up_read(&led->rwsem); |
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return ret; |
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} |
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static ssize_t bd2802_store_adv_conf(struct device *dev, |
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struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
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if (!count) |
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return -EINVAL; |
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down_write(&led->rwsem); |
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if (!led->adf_on && !strncmp(buf, "on", 2)) |
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bd2802_enable_adv_conf(led); |
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else if (led->adf_on && !strncmp(buf, "off", 3)) |
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bd2802_disable_adv_conf(led); |
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up_write(&led->rwsem); |
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return count; |
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} |
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static struct device_attribute bd2802_adv_conf_attr = { |
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.attr = { |
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.name = "advanced_configuration", |
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.mode = 0644, |
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}, |
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.show = bd2802_show_adv_conf, |
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.store = bd2802_store_adv_conf, |
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}; |
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#define BD2802_CONTROL_ATTR(attr_name, name_str) \ |
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static ssize_t bd2802_show_##attr_name(struct device *dev, \ |
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struct device_attribute *attr, char *buf) \ |
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{ \ |
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ |
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ssize_t ret; \ |
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down_read(&led->rwsem); \ |
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ret = sprintf(buf, "0x%02x\n", led->attr_name); \ |
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up_read(&led->rwsem); \ |
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return ret; \ |
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} \ |
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static ssize_t bd2802_store_##attr_name(struct device *dev, \ |
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struct device_attribute *attr, const char *buf, size_t count) \ |
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{ \ |
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struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\ |
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unsigned long val; \ |
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int ret; \ |
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if (!count) \ |
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return -EINVAL; \ |
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ret = kstrtoul(buf, 16, &val); \ |
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if (ret) \ |
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return ret; \ |
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down_write(&led->rwsem); \ |
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led->attr_name = val; \ |
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up_write(&led->rwsem); \ |
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return count; \ |
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} \ |
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static struct device_attribute bd2802_##attr_name##_attr = { \ |
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.attr = { \ |
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.name = name_str, \ |
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.mode = 0644, \ |
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}, \ |
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.show = bd2802_show_##attr_name, \ |
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.store = bd2802_store_##attr_name, \ |
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}; |
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BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern"); |
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BD2802_CONTROL_ATTR(rgb_current, "rgb_current"); |
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|
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static struct device_attribute *bd2802_attributes[] = { |
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&bd2802_adv_conf_attr, |
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&bd2802_wave_pattern_attr, |
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&bd2802_rgb_current_attr, |
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}; |
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|
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#define BD2802_CONTROL_RGBS(name, id, clr) \ |
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static int bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\ |
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enum led_brightness value) \ |
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{ \ |
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struct bd2802_led *led = \ |
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container_of(led_cdev, struct bd2802_led, cdev_##name); \ |
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led->led_id = id; \ |
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led->color = clr; \ |
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if (value == LED_OFF) { \ |
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led->state = BD2802_OFF; \ |
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bd2802_turn_off(led, led->led_id, led->color); \ |
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} else { \ |
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led->state = BD2802_ON; \ |
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bd2802_turn_on(led, led->led_id, led->color, BD2802_ON);\ |
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} \ |
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return 0; \ |
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} \ |
|
static int bd2802_set_##name##_blink(struct led_classdev *led_cdev, \ |
|
unsigned long *delay_on, unsigned long *delay_off) \ |
|
{ \ |
|
struct bd2802_led *led = \ |
|
container_of(led_cdev, struct bd2802_led, cdev_##name); \ |
|
if (*delay_on == 0 || *delay_off == 0) \ |
|
return -EINVAL; \ |
|
led->led_id = id; \ |
|
led->color = clr; \ |
|
led->state = BD2802_BLINK; \ |
|
bd2802_turn_on(led, led->led_id, led->color, BD2802_BLINK); \ |
|
return 0; \ |
|
} |
|
|
|
BD2802_CONTROL_RGBS(led1r, LED1, RED); |
|
BD2802_CONTROL_RGBS(led1g, LED1, GREEN); |
|
BD2802_CONTROL_RGBS(led1b, LED1, BLUE); |
|
BD2802_CONTROL_RGBS(led2r, LED2, RED); |
|
BD2802_CONTROL_RGBS(led2g, LED2, GREEN); |
|
BD2802_CONTROL_RGBS(led2b, LED2, BLUE); |
|
|
|
static int bd2802_register_led_classdev(struct bd2802_led *led) |
|
{ |
|
int ret; |
|
|
|
led->cdev_led1r.name = "led1_R"; |
|
led->cdev_led1r.brightness = LED_OFF; |
|
led->cdev_led1r.brightness_set_blocking = bd2802_set_led1r_brightness; |
|
led->cdev_led1r.blink_set = bd2802_set_led1r_blink; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led1r); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led1r.name); |
|
goto failed_unregister_led1_R; |
|
} |
|
|
|
led->cdev_led1g.name = "led1_G"; |
|
led->cdev_led1g.brightness = LED_OFF; |
|
led->cdev_led1g.brightness_set_blocking = bd2802_set_led1g_brightness; |
|
led->cdev_led1g.blink_set = bd2802_set_led1g_blink; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led1g); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led1g.name); |
|
goto failed_unregister_led1_G; |
|
} |
|
|
|
led->cdev_led1b.name = "led1_B"; |
|
led->cdev_led1b.brightness = LED_OFF; |
|
led->cdev_led1b.brightness_set_blocking = bd2802_set_led1b_brightness; |
|
led->cdev_led1b.blink_set = bd2802_set_led1b_blink; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led1b); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led1b.name); |
|
goto failed_unregister_led1_B; |
|
} |
|
|
|
led->cdev_led2r.name = "led2_R"; |
|
led->cdev_led2r.brightness = LED_OFF; |
|
led->cdev_led2r.brightness_set_blocking = bd2802_set_led2r_brightness; |
|
led->cdev_led2r.blink_set = bd2802_set_led2r_blink; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led2r); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led2r.name); |
|
goto failed_unregister_led2_R; |
|
} |
|
|
|
led->cdev_led2g.name = "led2_G"; |
|
led->cdev_led2g.brightness = LED_OFF; |
|
led->cdev_led2g.brightness_set_blocking = bd2802_set_led2g_brightness; |
|
led->cdev_led2g.blink_set = bd2802_set_led2g_blink; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led2g); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led2g.name); |
|
goto failed_unregister_led2_G; |
|
} |
|
|
|
led->cdev_led2b.name = "led2_B"; |
|
led->cdev_led2b.brightness = LED_OFF; |
|
led->cdev_led2b.brightness_set_blocking = bd2802_set_led2b_brightness; |
|
led->cdev_led2b.blink_set = bd2802_set_led2b_blink; |
|
led->cdev_led2b.flags |= LED_CORE_SUSPENDRESUME; |
|
|
|
ret = led_classdev_register(&led->client->dev, &led->cdev_led2b); |
|
if (ret < 0) { |
|
dev_err(&led->client->dev, "couldn't register LED %s\n", |
|
led->cdev_led2b.name); |
|
goto failed_unregister_led2_B; |
|
} |
|
|
|
return 0; |
|
|
|
failed_unregister_led2_B: |
|
led_classdev_unregister(&led->cdev_led2g); |
|
failed_unregister_led2_G: |
|
led_classdev_unregister(&led->cdev_led2r); |
|
failed_unregister_led2_R: |
|
led_classdev_unregister(&led->cdev_led1b); |
|
failed_unregister_led1_B: |
|
led_classdev_unregister(&led->cdev_led1g); |
|
failed_unregister_led1_G: |
|
led_classdev_unregister(&led->cdev_led1r); |
|
failed_unregister_led1_R: |
|
|
|
return ret; |
|
} |
|
|
|
static void bd2802_unregister_led_classdev(struct bd2802_led *led) |
|
{ |
|
led_classdev_unregister(&led->cdev_led2b); |
|
led_classdev_unregister(&led->cdev_led2g); |
|
led_classdev_unregister(&led->cdev_led2r); |
|
led_classdev_unregister(&led->cdev_led1b); |
|
led_classdev_unregister(&led->cdev_led1g); |
|
led_classdev_unregister(&led->cdev_led1r); |
|
} |
|
|
|
static int bd2802_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct bd2802_led *led; |
|
int ret, i; |
|
|
|
led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL); |
|
if (!led) |
|
return -ENOMEM; |
|
|
|
led->client = client; |
|
i2c_set_clientdata(client, led); |
|
|
|
/* |
|
* Configure RESET GPIO (L: RESET, H: RESET cancel) |
|
* |
|
* We request the reset GPIO as OUT_LOW which means de-asserted, |
|
* board files specifying this GPIO line in a machine descriptor |
|
* table should take care to specify GPIO_ACTIVE_LOW for this line. |
|
*/ |
|
led->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW); |
|
if (IS_ERR(led->reset)) |
|
return PTR_ERR(led->reset); |
|
|
|
/* Tacss = min 0.1ms */ |
|
udelay(100); |
|
|
|
/* Detect BD2802GU */ |
|
ret = bd2802_write_byte(client, BD2802_REG_CLKSETUP, 0x00); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "failed to detect device\n"); |
|
return ret; |
|
} else |
|
dev_info(&client->dev, "return 0x%02x\n", ret); |
|
|
|
/* To save the power, reset BD2802 after detecting */ |
|
gpiod_set_value(led->reset, 1); |
|
|
|
/* Default attributes */ |
|
led->wave_pattern = BD2802_PATTERN_HALF; |
|
led->rgb_current = BD2802_CURRENT_032; |
|
|
|
init_rwsem(&led->rwsem); |
|
|
|
for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) { |
|
ret = device_create_file(&led->client->dev, |
|
bd2802_attributes[i]); |
|
if (ret) { |
|
dev_err(&led->client->dev, "failed: sysfs file %s\n", |
|
bd2802_attributes[i]->attr.name); |
|
goto failed_unregister_dev_file; |
|
} |
|
} |
|
|
|
ret = bd2802_register_led_classdev(led); |
|
if (ret < 0) |
|
goto failed_unregister_dev_file; |
|
|
|
return 0; |
|
|
|
failed_unregister_dev_file: |
|
for (i--; i >= 0; i--) |
|
device_remove_file(&led->client->dev, bd2802_attributes[i]); |
|
return ret; |
|
} |
|
|
|
static int bd2802_remove(struct i2c_client *client) |
|
{ |
|
struct bd2802_led *led = i2c_get_clientdata(client); |
|
int i; |
|
|
|
gpiod_set_value(led->reset, 1); |
|
bd2802_unregister_led_classdev(led); |
|
if (led->adf_on) |
|
bd2802_disable_adv_conf(led); |
|
for (i = 0; i < ARRAY_SIZE(bd2802_attributes); i++) |
|
device_remove_file(&led->client->dev, bd2802_attributes[i]); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static void bd2802_restore_state(struct bd2802_led *led) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < LED_NUM; i++) { |
|
if (led->led[i].r) |
|
bd2802_turn_on(led, i, RED, led->led[i].r); |
|
if (led->led[i].g) |
|
bd2802_turn_on(led, i, GREEN, led->led[i].g); |
|
if (led->led[i].b) |
|
bd2802_turn_on(led, i, BLUE, led->led[i].b); |
|
} |
|
} |
|
|
|
static int bd2802_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bd2802_led *led = i2c_get_clientdata(client); |
|
|
|
gpiod_set_value(led->reset, 1); |
|
|
|
return 0; |
|
} |
|
|
|
static int bd2802_resume(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bd2802_led *led = i2c_get_clientdata(client); |
|
|
|
if (!bd2802_is_all_off(led) || led->adf_on) { |
|
bd2802_reset_cancel(led); |
|
bd2802_restore_state(led); |
|
} |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static SIMPLE_DEV_PM_OPS(bd2802_pm, bd2802_suspend, bd2802_resume); |
|
|
|
static const struct i2c_device_id bd2802_id[] = { |
|
{ "BD2802", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, bd2802_id); |
|
|
|
static struct i2c_driver bd2802_i2c_driver = { |
|
.driver = { |
|
.name = "BD2802", |
|
.pm = &bd2802_pm, |
|
}, |
|
.probe = bd2802_probe, |
|
.remove = bd2802_remove, |
|
.id_table = bd2802_id, |
|
}; |
|
|
|
module_i2c_driver(bd2802_i2c_driver); |
|
|
|
MODULE_AUTHOR("Kim Kyuwon <[email protected]>"); |
|
MODULE_DESCRIPTION("BD2802 LED driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|