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path: root/drivers/leds/leds-bd2802.c
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Diffstat (limited to 'drivers/leds/leds-bd2802.c')
-rw-r--r--drivers/leds/leds-bd2802.c809
1 files changed, 809 insertions, 0 deletions
diff --git a/drivers/leds/leds-bd2802.c b/drivers/leds/leds-bd2802.c
new file mode 100644
index 000000000..6078c15d3
--- /dev/null
+++ b/drivers/leds/leds-bd2802.c
@@ -0,0 +1,809 @@
+/*
+ * leds-bd2802.c - RGB LED Driver
+ *
+ * Copyright (C) 2009 Samsung Electronics
+ * Kim Kyuwon <q1.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Datasheet: http://www.rohm.com/products/databook/driver/pdf/bd2802gu-e.pdf
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/leds.h>
+#include <linux/leds-bd2802.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+
+#define LED_CTL(rgb2en, rgb1en) ((rgb2en) << 4 | ((rgb1en) << 0))
+
+#define BD2802_LED_OFFSET 0xa
+#define BD2802_COLOR_OFFSET 0x3
+
+#define BD2802_REG_CLKSETUP 0x00
+#define BD2802_REG_CONTROL 0x01
+#define BD2802_REG_HOURSETUP 0x02
+#define BD2802_REG_CURRENT1SETUP 0x03
+#define BD2802_REG_CURRENT2SETUP 0x04
+#define BD2802_REG_WAVEPATTERN 0x05
+
+#define BD2802_CURRENT_032 0x10 /* 3.2mA */
+#define BD2802_CURRENT_000 0x00 /* 0.0mA */
+
+#define BD2802_PATTERN_FULL 0x07
+#define BD2802_PATTERN_HALF 0x03
+
+enum led_ids {
+ LED1,
+ LED2,
+ LED_NUM,
+};
+
+enum led_colors {
+ RED,
+ GREEN,
+ BLUE,
+};
+
+enum led_bits {
+ BD2802_OFF,
+ BD2802_BLINK,
+ BD2802_ON,
+};
+
+/*
+ * State '0' : 'off'
+ * State '1' : 'blink'
+ * State '2' : 'on'.
+ */
+struct led_state {
+ unsigned r:2;
+ unsigned g:2;
+ unsigned b:2;
+};
+
+struct bd2802_led {
+ struct bd2802_led_platform_data *pdata;
+ struct i2c_client *client;
+ struct rw_semaphore rwsem;
+ struct work_struct work;
+
+ struct led_state led[2];
+
+ /*
+ * Making led_classdev as array is not recommended, because array
+ * members prevent using 'container_of' macro. So repetitive works
+ * are needed.
+ */
+ struct led_classdev cdev_led1r;
+ struct led_classdev cdev_led1g;
+ struct led_classdev cdev_led1b;
+ struct led_classdev cdev_led2r;
+ struct led_classdev cdev_led2g;
+ struct led_classdev cdev_led2b;
+
+ /*
+ * Advanced Configuration Function(ADF) mode:
+ * In ADF mode, user can set registers of BD2802GU directly,
+ * therefore BD2802GU doesn't enter reset state.
+ */
+ int adf_on;
+
+ enum led_ids led_id;
+ enum led_colors color;
+ enum led_bits state;
+
+ /* General attributes of RGB LEDs */
+ int wave_pattern;
+ int rgb_current;
+};
+
+
+/*--------------------------------------------------------------*/
+/* BD2802GU helper functions */
+/*--------------------------------------------------------------*/
+
+static inline int bd2802_is_rgb_off(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ switch (color) {
+ case RED:
+ return !led->led[id].r;
+ case GREEN:
+ return !led->led[id].g;
+ case BLUE:
+ return !led->led[id].b;
+ default:
+ dev_err(&led->client->dev, "%s: Invalid color\n", __func__);
+ return -EINVAL;
+ }
+}
+
+static inline int bd2802_is_led_off(struct bd2802_led *led, enum led_ids id)
+{
+ if (led->led[id].r || led->led[id].g || led->led[id].b)
+ return 0;
+
+ return 1;
+}
+
+static inline int bd2802_is_all_off(struct bd2802_led *led)
+{
+ int i;
+
+ for (i = 0; i < LED_NUM; i++)
+ if (!bd2802_is_led_off(led, i))
+ return 0;
+
+ return 1;
+}
+
+static inline u8 bd2802_get_base_offset(enum led_ids id, enum led_colors color)
+{
+ return id * BD2802_LED_OFFSET + color * BD2802_COLOR_OFFSET;
+}
+
+static inline u8 bd2802_get_reg_addr(enum led_ids id, enum led_colors color,
+ u8 reg_offset)
+{
+ return reg_offset + bd2802_get_base_offset(id, color);
+}
+
+
+/*--------------------------------------------------------------*/
+/* BD2802GU core functions */
+/*--------------------------------------------------------------*/
+
+static int bd2802_write_byte(struct i2c_client *client, u8 reg, u8 val)
+{
+ int ret = i2c_smbus_write_byte_data(client, reg, val);
+ if (ret >= 0)
+ return 0;
+
+ dev_err(&client->dev, "%s: reg 0x%x, val 0x%x, err %d\n",
+ __func__, reg, val, ret);
+
+ return ret;
+}
+
+static void bd2802_update_state(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color, enum led_bits led_bit)
+{
+ int i;
+ u8 value;
+
+ for (i = 0; i < LED_NUM; i++) {
+ if (i == id) {
+ switch (color) {
+ case RED:
+ led->led[i].r = led_bit;
+ break;
+ case GREEN:
+ led->led[i].g = led_bit;
+ break;
+ case BLUE:
+ led->led[i].b = led_bit;
+ break;
+ default:
+ dev_err(&led->client->dev,
+ "%s: Invalid color\n", __func__);
+ return;
+ }
+ }
+ }
+
+ if (led_bit == BD2802_BLINK || led_bit == BD2802_ON)
+ return;
+
+ if (!bd2802_is_led_off(led, id))
+ return;
+
+ if (bd2802_is_all_off(led) && !led->adf_on) {
+ gpio_set_value(led->pdata->reset_gpio, 0);
+ return;
+ }
+
+ /*
+ * In this case, other led is turned on, and current led is turned
+ * off. So set RGB LED Control register to stop the current RGB LED
+ */
+ value = (id == LED1) ? LED_CTL(1, 0) : LED_CTL(0, 1);
+ bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
+}
+
+static void bd2802_configure(struct bd2802_led *led)
+{
+ struct bd2802_led_platform_data *pdata = led->pdata;
+ u8 reg;
+
+ reg = bd2802_get_reg_addr(LED1, RED, BD2802_REG_HOURSETUP);
+ bd2802_write_byte(led->client, reg, pdata->rgb_time);
+
+ reg = bd2802_get_reg_addr(LED2, RED, BD2802_REG_HOURSETUP);
+ bd2802_write_byte(led->client, reg, pdata->rgb_time);
+}
+
+static void bd2802_reset_cancel(struct bd2802_led *led)
+{
+ gpio_set_value(led->pdata->reset_gpio, 1);
+ udelay(100);
+ bd2802_configure(led);
+}
+
+static void bd2802_enable(struct bd2802_led *led, enum led_ids id)
+{
+ enum led_ids other_led = (id == LED1) ? LED2 : LED1;
+ u8 value, other_led_on;
+
+ other_led_on = !bd2802_is_led_off(led, other_led);
+ if (id == LED1)
+ value = LED_CTL(other_led_on, 1);
+ else
+ value = LED_CTL(1 , other_led_on);
+
+ bd2802_write_byte(led->client, BD2802_REG_CONTROL, value);
+}
+
+static void bd2802_set_on(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_all_off(led) && !led->adf_on)
+ bd2802_reset_cancel(led);
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, led->rgb_current);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
+ bd2802_write_byte(led->client, reg, BD2802_PATTERN_FULL);
+
+ bd2802_enable(led, id);
+ bd2802_update_state(led, id, color, BD2802_ON);
+}
+
+static void bd2802_set_blink(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_all_off(led) && !led->adf_on)
+ bd2802_reset_cancel(led);
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, led->rgb_current);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_WAVEPATTERN);
+ bd2802_write_byte(led->client, reg, led->wave_pattern);
+
+ bd2802_enable(led, id);
+ bd2802_update_state(led, id, color, BD2802_BLINK);
+}
+
+static void bd2802_turn_on(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color, enum led_bits led_bit)
+{
+ if (led_bit == BD2802_OFF) {
+ dev_err(&led->client->dev,
+ "Only 'blink' and 'on' are allowed\n");
+ return;
+ }
+
+ if (led_bit == BD2802_BLINK)
+ bd2802_set_blink(led, id, color);
+ else
+ bd2802_set_on(led, id, color);
+}
+
+static void bd2802_turn_off(struct bd2802_led *led, enum led_ids id,
+ enum led_colors color)
+{
+ u8 reg;
+
+ if (bd2802_is_rgb_off(led, id, color))
+ return;
+
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT1SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+ reg = bd2802_get_reg_addr(id, color, BD2802_REG_CURRENT2SETUP);
+ bd2802_write_byte(led->client, reg, BD2802_CURRENT_000);
+
+ bd2802_update_state(led, id, color, BD2802_OFF);
+}
+
+#define BD2802_SET_REGISTER(reg_addr, reg_name) \
+static ssize_t bd2802_store_reg##reg_addr(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); \
+ bd2802_write_byte(led->client, reg_addr, (u8) val); \
+ up_write(&led->rwsem); \
+ return count; \
+} \
+static struct device_attribute bd2802_reg##reg_addr##_attr = { \
+ .attr = {.name = reg_name, .mode = 0644}, \
+ .store = bd2802_store_reg##reg_addr, \
+};
+
+BD2802_SET_REGISTER(0x00, "0x00");
+BD2802_SET_REGISTER(0x01, "0x01");
+BD2802_SET_REGISTER(0x02, "0x02");
+BD2802_SET_REGISTER(0x03, "0x03");
+BD2802_SET_REGISTER(0x04, "0x04");
+BD2802_SET_REGISTER(0x05, "0x05");
+BD2802_SET_REGISTER(0x06, "0x06");
+BD2802_SET_REGISTER(0x07, "0x07");
+BD2802_SET_REGISTER(0x08, "0x08");
+BD2802_SET_REGISTER(0x09, "0x09");
+BD2802_SET_REGISTER(0x0a, "0x0a");
+BD2802_SET_REGISTER(0x0b, "0x0b");
+BD2802_SET_REGISTER(0x0c, "0x0c");
+BD2802_SET_REGISTER(0x0d, "0x0d");
+BD2802_SET_REGISTER(0x0e, "0x0e");
+BD2802_SET_REGISTER(0x0f, "0x0f");
+BD2802_SET_REGISTER(0x10, "0x10");
+BD2802_SET_REGISTER(0x11, "0x11");
+BD2802_SET_REGISTER(0x12, "0x12");
+BD2802_SET_REGISTER(0x13, "0x13");
+BD2802_SET_REGISTER(0x14, "0x14");
+BD2802_SET_REGISTER(0x15, "0x15");
+
+static struct device_attribute *bd2802_addr_attributes[] = {
+ &bd2802_reg0x00_attr,
+ &bd2802_reg0x01_attr,
+ &bd2802_reg0x02_attr,
+ &bd2802_reg0x03_attr,
+ &bd2802_reg0x04_attr,
+ &bd2802_reg0x05_attr,
+ &bd2802_reg0x06_attr,
+ &bd2802_reg0x07_attr,
+ &bd2802_reg0x08_attr,
+ &bd2802_reg0x09_attr,
+ &bd2802_reg0x0a_attr,
+ &bd2802_reg0x0b_attr,
+ &bd2802_reg0x0c_attr,
+ &bd2802_reg0x0d_attr,
+ &bd2802_reg0x0e_attr,
+ &bd2802_reg0x0f_attr,
+ &bd2802_reg0x10_attr,
+ &bd2802_reg0x11_attr,
+ &bd2802_reg0x12_attr,
+ &bd2802_reg0x13_attr,
+ &bd2802_reg0x14_attr,
+ &bd2802_reg0x15_attr,
+};
+
+static void bd2802_enable_adv_conf(struct bd2802_led *led)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++) {
+ ret = device_create_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+ if (ret) {
+ dev_err(&led->client->dev, "failed: sysfs file %s\n",
+ bd2802_addr_attributes[i]->attr.name);
+ goto failed_remove_files;
+ }
+ }
+
+ if (bd2802_is_all_off(led))
+ bd2802_reset_cancel(led);
+
+ led->adf_on = 1;
+
+ return;
+
+failed_remove_files:
+ for (i--; i >= 0; i--)
+ device_remove_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+}
+
+static void bd2802_disable_adv_conf(struct bd2802_led *led)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bd2802_addr_attributes); i++)
+ device_remove_file(&led->client->dev,
+ bd2802_addr_attributes[i]);
+
+ if (bd2802_is_all_off(led))
+ gpio_set_value(led->pdata->reset_gpio, 0);
+
+ led->adf_on = 0;
+}
+
+static ssize_t bd2802_show_adv_conf(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ ssize_t ret;
+
+ down_read(&led->rwsem);
+ if (led->adf_on)
+ ret = sprintf(buf, "on\n");
+ else
+ ret = sprintf(buf, "off\n");
+ up_read(&led->rwsem);
+
+ return ret;
+}
+
+static ssize_t bd2802_store_adv_conf(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));
+
+ if (!count)
+ return -EINVAL;
+
+ down_write(&led->rwsem);
+ if (!led->adf_on && !strncmp(buf, "on", 2))
+ bd2802_enable_adv_conf(led);
+ else if (led->adf_on && !strncmp(buf, "off", 3))
+ bd2802_disable_adv_conf(led);
+ up_write(&led->rwsem);
+
+ return count;
+}
+
+static struct device_attribute bd2802_adv_conf_attr = {
+ .attr = {
+ .name = "advanced_configuration",
+ .mode = 0644,
+ },
+ .show = bd2802_show_adv_conf,
+ .store = bd2802_store_adv_conf,
+};
+
+#define BD2802_CONTROL_ATTR(attr_name, name_str) \
+static ssize_t bd2802_show_##attr_name(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct bd2802_led *led = i2c_get_clientdata(to_i2c_client(dev));\
+ ssize_t ret; \
+ down_read(&led->rwsem); \
+ ret = sprintf(buf, "0x%02x\n", led->attr_name); \
+ up_read(&led->rwsem); \
+ return ret; \
+} \
+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,
+};
+
+static void bd2802_led_work(struct work_struct *work)
+{
+ struct bd2802_led *led = container_of(work, struct bd2802_led, work);
+
+ if (led->state)
+ bd2802_turn_on(led, led->led_id, led->color, led->state);
+ else
+ bd2802_turn_off(led, led->led_id, led->color);
+}
+
+#define BD2802_CONTROL_RGBS(name, id, clr) \
+static void 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; \
+ else \
+ led->state = BD2802_ON; \
+ schedule_work(&led->work); \
+} \
+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; \
+ schedule_work(&led->work); \
+ 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;
+
+ INIT_WORK(&led->work, bd2802_led_work);
+
+ led->cdev_led1r.name = "led1_R";
+ led->cdev_led1r.brightness = LED_OFF;
+ led->cdev_led1r.brightness_set = 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 = 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 = 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 = 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 = 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 = 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)
+{
+ cancel_work_sync(&led->work);
+ 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");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 16:58:57 +0000