mirror of https://gitee.com/openkylin/linux.git
795 lines
20 KiB
C
795 lines
20 KiB
C
// 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 <q1.kim@samsung.com>
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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.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 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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gpio_set_value(led->pdata->reset_gpio, 0);
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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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gpio_set_value(led->pdata->reset_gpio, 1);
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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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gpio_set_value(led->pdata->reset_gpio, 0);
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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, \
|
|
struct device_attribute *attr, const char *buf, size_t count) \
|
|
{ \
|
|
struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
|
|
unsigned long val; \
|
|
int ret; \
|
|
if (!count) \
|
|
return -EINVAL; \
|
|
ret = kstrtoul(buf, 16, &val); \
|
|
if (ret) \
|
|
return ret; \
|
|
down_write(&led->rwsem); \
|
|
led->attr_name = val; \
|
|
up_write(&led->rwsem); \
|
|
return count; \
|
|
} \
|
|
static struct device_attribute bd2802_##attr_name##_attr = { \
|
|
.attr = { \
|
|
.name = name_str, \
|
|
.mode = 0644, \
|
|
}, \
|
|
.show = bd2802_show_##attr_name, \
|
|
.store = bd2802_store_##attr_name, \
|
|
};
|
|
|
|
BD2802_CONTROL_ATTR(wave_pattern, "wave_pattern");
|
|
BD2802_CONTROL_ATTR(rgb_current, "rgb_current");
|
|
|
|
static struct device_attribute *bd2802_attributes[] = {
|
|
&bd2802_adv_conf_attr,
|
|
&bd2802_wave_pattern_attr,
|
|
&bd2802_rgb_current_attr,
|
|
};
|
|
|
|
#define BD2802_CONTROL_RGBS(name, id, clr) \
|
|
static int bd2802_set_##name##_brightness(struct led_classdev *led_cdev,\
|
|
enum led_brightness value) \
|
|
{ \
|
|
struct bd2802_led *led = \
|
|
container_of(led_cdev, struct bd2802_led, cdev_##name); \
|
|
led->led_id = id; \
|
|
led->color = clr; \
|
|
if (value == LED_OFF) { \
|
|
led->state = BD2802_OFF; \
|
|
bd2802_turn_off(led, led->led_id, led->color); \
|
|
} else { \
|
|
led->state = BD2802_ON; \
|
|
bd2802_turn_on(led, led->led_id, led->color, BD2802_ON);\
|
|
} \
|
|
return 0; \
|
|
} \
|
|
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;
|
|
struct bd2802_led_platform_data *pdata;
|
|
int ret, i;
|
|
|
|
led = devm_kzalloc(&client->dev, sizeof(struct bd2802_led), GFP_KERNEL);
|
|
if (!led)
|
|
return -ENOMEM;
|
|
|
|
led->client = client;
|
|
pdata = led->pdata = dev_get_platdata(&client->dev);
|
|
i2c_set_clientdata(client, led);
|
|
|
|
/* Configure RESET GPIO (L: RESET, H: RESET cancel) */
|
|
gpio_request_one(pdata->reset_gpio, GPIOF_OUT_INIT_HIGH, "RGB_RESETB");
|
|
|
|
/* 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 */
|
|
gpio_set_value(led->pdata->reset_gpio, 0);
|
|
|
|
/* 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;
|
|
|
|
gpio_set_value(led->pdata->reset_gpio, 0);
|
|
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);
|
|
|
|
gpio_set_value(led->pdata->reset_gpio, 0);
|
|
|
|
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 <q1.kim@samsung.com>");
|
|
MODULE_DESCRIPTION("BD2802 LED driver");
|
|
MODULE_LICENSE("GPL v2");
|