--- /dev/null
+Kernel driver for LP5562
+========================
+
+* TI LP5562 LED Driver
+
+Author: Milo(Woogyom) Kim <milo.kim@ti.com>
+
+Description
+
+ LP5562 can drive up to 4 channels. R/G/B and White.
+ LEDs can be controlled directly via the led class control interface.
+
+ All four channels can be also controlled using the engine micro programs.
+ LP5562 has the internal program memory for running various LED patterns.
+ For the details, please refer to 'firmware' section in leds-lp55xx.txt
+
+Device attribute: engine_mux
+
+ 3 Engines are allocated in LP5562, but the number of channel is 4.
+ Therefore each channel should be mapped to the engine number.
+ Value : RGB or W
+
+ This attribute is used for programming LED data with the firmware interface.
+ Unlike the LP5521/LP5523/55231, LP5562 has unique feature for the engine mux,
+ so additional sysfs is required.
+
+ LED Map
+ Red ... Engine 1 (fixed)
+ Green ... Engine 2 (fixed)
+ Blue ... Engine 3 (fixed)
+ White ... Engine 1 or 2 or 3 (selective)
+
+How to load the program data using engine_mux
+
+ Before loading the LP5562 program data, engine_mux should be written between
+ the engine selection and loading the firmware.
+ Engine mux has two different mode, RGB and W.
+ RGB is used for loading RGB program data, W is used for W program data.
+
+ For example, run blinking green channel pattern,
+ echo 2 > /sys/bus/i2c/devices/xxxx/select_engine # 2 is for green channel
+ echo "RGB" > /sys/bus/i2c/devices/xxxx/engine_mux # engine mux for RGB
+ echo 1 > /sys/class/firmware/lp5562/loading
+ echo "4000600040FF6000" > /sys/class/firmware/lp5562/data
+ echo 0 > /sys/class/firmware/lp5562/loading
+ echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
+
+ To run a blinking white pattern,
+ echo 1 or 2 or 3 > /sys/bus/i2c/devices/xxxx/select_engine
+ echo "W" > /sys/bus/i2c/devices/xxxx/engine_mux
+ echo 1 > /sys/class/firmware/lp5562/loading
+ echo "4000600040FF6000" > /sys/class/firmware/lp5562/data
+ echo 0 > /sys/class/firmware/lp5562/loading
+ echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
+
+How to load the predefined patterns
+
+ Please refer to 'leds-lp55xx.txt"
+
+Setting Current of Each Channel
+
+ Like LP5521 and LP5523/55231, LP5562 provides LED current settings.
+ The 'led_current' and 'max_current' are used.
+
+(Example of Platform data)
+
+To configure the platform specific data, lp55xx_platform_data structure is used.
+
+static struct lp55xx_led_config lp5562_led_config[] = {
+ {
+ .name = "R",
+ .chan_nr = 0,
+ .led_current = 20,
+ .max_current = 40,
+ },
+ {
+ .name = "G",
+ .chan_nr = 1,
+ .led_current = 20,
+ .max_current = 40,
+ },
+ {
+ .name = "B",
+ .chan_nr = 2,
+ .led_current = 20,
+ .max_current = 40,
+ },
+ {
+ .name = "W",
+ .chan_nr = 3,
+ .led_current = 20,
+ .max_current = 40,
+ },
+};
+
+static int lp5562_setup(void)
+{
+ /* setup HW resources */
+}
+
+static void lp5562_release(void)
+{
+ /* Release HW resources */
+}
+
+static void lp5562_enable(bool state)
+{
+ /* Control of chip enable signal */
+}
+
+static struct lp55xx_platform_data lp5562_platform_data = {
+ .led_config = lp5562_led_config,
+ .num_channels = ARRAY_SIZE(lp5562_led_config),
+ .setup_resources = lp5562_setup,
+ .release_resources = lp5562_release,
+ .enable = lp5562_enable,
+};
+
+If the current is set to 0 in the platform data, that channel is
+disabled and it is not visible in the sysfs.
+
+The 'update_config' : CONFIG register (ADDR 08h)
+This value is platform-specific data.
+If update_config is not defined, the CONFIG register is set with
+'LP5562_PWRSAVE_EN | LP5562_CLK_AUTO'.
+(Enable auto-powersave, set automatic clock source selection)
+
+#define LP5562_CONFIGS (LP5562_PWM_HF | LP5562_PWRSAVE_EN | \
+ LP5562_CLK_SRC_EXT)
+
+static struct lp55xx_platform_data lp5562_pdata = {
+ .led_config = lp5562_led_config,
+ .num_channels = ARRAY_SIZE(lp5562_led_config),
+ .update_config = LP5562_CONFIGS,
+};
--- /dev/null
+/*
+ * LP5562 LED driver
+ *
+ * Copyright (C) 2013 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@ti.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.
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
+#include <linux/slab.h>
+
+#include "leds-lp55xx-common.h"
+
+#define LP5562_PROGRAM_LENGTH 32
+#define LP5562_MAX_LEDS 4
+
+/* ENABLE Register 00h */
+#define LP5562_REG_ENABLE 0x00
+#define LP5562_EXEC_ENG1_M 0x30
+#define LP5562_EXEC_ENG2_M 0x0C
+#define LP5562_EXEC_ENG3_M 0x03
+#define LP5562_EXEC_M 0x3F
+#define LP5562_MASTER_ENABLE 0x40 /* Chip master enable */
+#define LP5562_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */
+#define LP5562_EXEC_RUN 0x2A
+#define LP5562_ENABLE_DEFAULT \
+ (LP5562_MASTER_ENABLE | LP5562_LOGARITHMIC_PWM)
+#define LP5562_ENABLE_RUN_PROGRAM \
+ (LP5562_ENABLE_DEFAULT | LP5562_EXEC_RUN)
+
+/* OPMODE Register 01h */
+#define LP5562_REG_OP_MODE 0x01
+#define LP5562_MODE_ENG1_M 0x30
+#define LP5562_MODE_ENG2_M 0x0C
+#define LP5562_MODE_ENG3_M 0x03
+#define LP5562_LOAD_ENG1 0x10
+#define LP5562_LOAD_ENG2 0x04
+#define LP5562_LOAD_ENG3 0x01
+#define LP5562_RUN_ENG1 0x20
+#define LP5562_RUN_ENG2 0x08
+#define LP5562_RUN_ENG3 0x02
+#define LP5562_ENG1_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG1_M) == LP5562_LOAD_ENG1)
+#define LP5562_ENG2_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG2_M) == LP5562_LOAD_ENG2)
+#define LP5562_ENG3_IS_LOADING(mode) \
+ ((mode & LP5562_MODE_ENG3_M) == LP5562_LOAD_ENG3)
+
+/* BRIGHTNESS Registers */
+#define LP5562_REG_R_PWM 0x04
+#define LP5562_REG_G_PWM 0x03
+#define LP5562_REG_B_PWM 0x02
+#define LP5562_REG_W_PWM 0x0E
+
+/* CURRENT Registers */
+#define LP5562_REG_R_CURRENT 0x07
+#define LP5562_REG_G_CURRENT 0x06
+#define LP5562_REG_B_CURRENT 0x05
+#define LP5562_REG_W_CURRENT 0x0F
+
+/* CONFIG Register 08h */
+#define LP5562_REG_CONFIG 0x08
+#define LP5562_DEFAULT_CFG \
+ (LP5562_PWM_HF | LP5562_PWRSAVE_EN | LP5562_CLK_INT)
+
+/* RESET Register 0Dh */
+#define LP5562_REG_RESET 0x0D
+#define LP5562_RESET 0xFF
+
+/* PROGRAM ENGINE Registers */
+#define LP5562_REG_PROG_MEM_ENG1 0x10
+#define LP5562_REG_PROG_MEM_ENG2 0x30
+#define LP5562_REG_PROG_MEM_ENG3 0x50
+
+/* LEDMAP Register 70h */
+#define LP5562_REG_ENG_SEL 0x70
+#define LP5562_ENG_SEL_PWM 0
+#define LP5562_ENG_FOR_RGB_M 0x3F
+#define LP5562_ENG_SEL_RGB 0x1B /* R:ENG1, G:ENG2, B:ENG3 */
+#define LP5562_ENG_FOR_W_M 0xC0
+#define LP5562_ENG1_FOR_W 0x40 /* W:ENG1 */
+#define LP5562_ENG2_FOR_W 0x80 /* W:ENG2 */
+#define LP5562_ENG3_FOR_W 0xC0 /* W:ENG3 */
+
+/* Program Commands */
+#define LP5562_CMD_DISABLE 0x00
+#define LP5562_CMD_LOAD 0x15
+#define LP5562_CMD_RUN 0x2A
+#define LP5562_CMD_DIRECT 0x3F
+#define LP5562_PATTERN_OFF 0
+
+static inline void lp5562_wait_opmode_done(void)
+{
+ /* operation mode change needs to be longer than 153 us */
+ usleep_range(200, 300);
+}
+
+static inline void lp5562_wait_enable_done(void)
+{
+ /* it takes more 488 us to update ENABLE register */
+ usleep_range(500, 600);
+}
+
+static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)
+{
+ u8 addr[] = {
+ LP5562_REG_R_CURRENT,
+ LP5562_REG_G_CURRENT,
+ LP5562_REG_B_CURRENT,
+ LP5562_REG_W_CURRENT,
+ };
+
+ led->led_current = led_current;
+ lp55xx_write(led->chip, addr[led->chan_nr], led_current);
+}
+
+static void lp5562_load_engine(struct lp55xx_chip *chip)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5562_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5562_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5562_MODE_ENG3_M,
+ };
+
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5562_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5562_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5562_LOAD_ENG3,
+ };
+
+ lp55xx_update_bits(chip, LP5562_REG_OP_MODE, mask[idx], val[idx]);
+
+ lp5562_wait_opmode_done();
+}
+
+static void lp5562_stop_engine(struct lp55xx_chip *chip)
+{
+ lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DISABLE);
+ lp5562_wait_opmode_done();
+}
+
+static void lp5562_run_engine(struct lp55xx_chip *chip, bool start)
+{
+ int ret;
+ u8 mode;
+ u8 exec;
+
+ /* stop engine */
+ if (!start) {
+ lp55xx_write(chip, LP5562_REG_ENABLE, LP5562_ENABLE_DEFAULT);
+ lp5562_wait_enable_done();
+ lp5562_stop_engine(chip);
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
+ lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
+ lp5562_wait_opmode_done();
+ return;
+ }
+
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
+
+ ret = lp55xx_read(chip, LP5562_REG_OP_MODE, &mode);
+ if (ret)
+ return;
+
+ ret = lp55xx_read(chip, LP5562_REG_ENABLE, &exec);
+ if (ret)
+ return;
+
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5562_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG1_M) | LP5562_RUN_ENG1;
+ exec = (exec & ~LP5562_EXEC_ENG1_M) | LP5562_RUN_ENG1;
+ }
+
+ if (LP5562_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG2_M) | LP5562_RUN_ENG2;
+ exec = (exec & ~LP5562_EXEC_ENG2_M) | LP5562_RUN_ENG2;
+ }
+
+ if (LP5562_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5562_MODE_ENG3_M) | LP5562_RUN_ENG3;
+ exec = (exec & ~LP5562_EXEC_ENG3_M) | LP5562_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5562_REG_OP_MODE, mode);
+ lp5562_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5562_REG_ENABLE, LP5562_EXEC_M, exec);
+ lp5562_wait_enable_done();
+}
+
+static int lp5562_update_firmware(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
+{
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 pattern[LP5562_PROGRAM_LENGTH] = {0};
+ u8 addr[] = {
+ [LP55XX_ENGINE_1] = LP5562_REG_PROG_MEM_ENG1,
+ [LP55XX_ENGINE_2] = LP5562_REG_PROG_MEM_ENG2,
+ [LP55XX_ENGINE_3] = LP5562_REG_PROG_MEM_ENG3,
+ };
+ unsigned cmd;
+ char c[3];
+ int program_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
+ int i;
+
+ /* clear program memory before updating */
+ for (i = 0; i < LP5562_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, addr[idx] + i, 0);
+
+ i = 0;
+ while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
+
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
+
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
+
+ program_size = i;
+ for (i = 0; i < program_size; i++)
+ lp55xx_write(chip, addr[idx] + i, pattern[i]);
+
+ return 0;
+
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
+}
+
+static void lp5562_firmware_loaded(struct lp55xx_chip *chip)
+{
+ const struct firmware *fw = chip->fw;
+
+ if (fw->size > LP5562_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
+
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5562_load_engine(chip);
+ lp5562_update_firmware(chip, fw->data, fw->size);
+}
+
+static int lp5562_post_init_device(struct lp55xx_chip *chip)
+{
+ int ret;
+ u8 update_cfg = chip->pdata->update_config ? : LP5562_DEFAULT_CFG;
+
+ /* Set all PWMs to direct control mode */
+ ret = lp55xx_write(chip, LP5562_REG_OP_MODE, LP5562_CMD_DIRECT);
+ if (ret)
+ return ret;
+
+ lp5562_wait_opmode_done();
+
+ ret = lp55xx_write(chip, LP5562_REG_CONFIG, update_cfg);
+ if (ret)
+ return ret;
+
+ /* Initialize all channels PWM to zero -> leds off */
+ lp55xx_write(chip, LP5562_REG_R_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_G_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_B_PWM, 0);
+ lp55xx_write(chip, LP5562_REG_W_PWM, 0);
+
+ /* Set LED map as register PWM by default */
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_PWM);
+
+ return 0;
+}
+
+static void lp5562_led_brightness_work(struct work_struct *work)
+{
+ struct lp55xx_led *led = container_of(work, struct lp55xx_led,
+ brightness_work);
+ struct lp55xx_chip *chip = led->chip;
+ u8 addr[] = {
+ LP5562_REG_R_PWM,
+ LP5562_REG_G_PWM,
+ LP5562_REG_B_PWM,
+ LP5562_REG_W_PWM,
+ };
+
+ mutex_lock(&chip->lock);
+ lp55xx_write(chip, addr[led->chan_nr], led->brightness);
+ mutex_unlock(&chip->lock);
+}
+
+static void lp5562_write_program_memory(struct lp55xx_chip *chip,
+ u8 base, const u8 *rgb, int size)
+{
+ int i;
+
+ if (!rgb || size <= 0)
+ return;
+
+ for (i = 0; i < size; i++)
+ lp55xx_write(chip, base + i, *(rgb + i));
+
+ lp55xx_write(chip, base + i, 0);
+ lp55xx_write(chip, base + i + 1, 0);
+}
+
+/* check the size of program count */
+static inline bool _is_pc_overflow(struct lp55xx_predef_pattern *ptn)
+{
+ return (ptn->size_r >= LP5562_PROGRAM_LENGTH ||
+ ptn->size_g >= LP5562_PROGRAM_LENGTH ||
+ ptn->size_b >= LP5562_PROGRAM_LENGTH);
+}
+
+static int lp5562_run_predef_led_pattern(struct lp55xx_chip *chip, int mode)
+{
+ struct lp55xx_predef_pattern *ptn;
+ int i;
+
+ if (mode == LP5562_PATTERN_OFF) {
+ lp5562_run_engine(chip, false);
+ return 0;
+ }
+
+ ptn = chip->pdata->patterns + (mode - 1);
+ if (!ptn || _is_pc_overflow(ptn)) {
+ dev_err(&chip->cl->dev, "invalid pattern data\n");
+ return -EINVAL;
+ }
+
+ lp5562_stop_engine(chip);
+
+ /* Set LED map as RGB */
+ lp55xx_write(chip, LP5562_REG_ENG_SEL, LP5562_ENG_SEL_RGB);
+
+ /* Load engines */
+ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
+ chip->engine_idx = i;
+ lp5562_load_engine(chip);
+ }
+
+ /* Clear program registers */
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG1 + 1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG2 + 1, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3, 0);
+ lp55xx_write(chip, LP5562_REG_PROG_MEM_ENG3 + 1, 0);
+
+ /* Program engines */
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG1,
+ ptn->r, ptn->size_r);
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG2,
+ ptn->g, ptn->size_g);
+ lp5562_write_program_memory(chip, LP5562_REG_PROG_MEM_ENG3,
+ ptn->b, ptn->size_b);
+
+ /* Run engines */
+ lp5562_run_engine(chip, true);
+
+ return 0;
+}
+
+static ssize_t lp5562_store_pattern(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;
+ int num_patterns = chip->pdata->num_patterns;
+ unsigned long mode;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &mode);
+ if (ret)
+ return ret;
+
+ if (mode > num_patterns || !ptn)
+ return -EINVAL;
+
+ mutex_lock(&chip->lock);
+ ret = lp5562_run_predef_led_pattern(chip, mode);
+ mutex_unlock(&chip->lock);
+
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static ssize_t lp5562_store_engine_mux(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
+ u8 mask;
+ u8 val;
+
+ /* LED map
+ * R ... Engine 1 (fixed)
+ * G ... Engine 2 (fixed)
+ * B ... Engine 3 (fixed)
+ * W ... Engine 1 or 2 or 3
+ */
+
+ if (sysfs_streq(buf, "RGB")) {
+ mask = LP5562_ENG_FOR_RGB_M;
+ val = LP5562_ENG_SEL_RGB;
+ } else if (sysfs_streq(buf, "W")) {
+ enum lp55xx_engine_index idx = chip->engine_idx;
+
+ mask = LP5562_ENG_FOR_W_M;
+ switch (idx) {
+ case LP55XX_ENGINE_1:
+ val = LP5562_ENG1_FOR_W;
+ break;
+ case LP55XX_ENGINE_2:
+ val = LP5562_ENG2_FOR_W;
+ break;
+ case LP55XX_ENGINE_3:
+ val = LP5562_ENG3_FOR_W;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ } else {
+ dev_err(dev, "choose RGB or W\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&chip->lock);
+ lp55xx_update_bits(chip, LP5562_REG_ENG_SEL, mask, val);
+ mutex_unlock(&chip->lock);
+
+ return len;
+}
+
+static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, lp5562_store_pattern);
+static DEVICE_ATTR(engine_mux, S_IWUSR, NULL, lp5562_store_engine_mux);
+
+static struct attribute *lp5562_attributes[] = {
+ &dev_attr_led_pattern.attr,
+ &dev_attr_engine_mux.attr,
+ NULL,
+};
+
+static const struct attribute_group lp5562_group = {
+ .attrs = lp5562_attributes,
+};
+
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5562_cfg = {
+ .max_channel = LP5562_MAX_LEDS,
+ .reset = {
+ .addr = LP5562_REG_RESET,
+ .val = LP5562_RESET,
+ },
+ .enable = {
+ .addr = LP5562_REG_ENABLE,
+ .val = LP5562_ENABLE_DEFAULT,
+ },
+ .post_init_device = lp5562_post_init_device,
+ .set_led_current = lp5562_set_led_current,
+ .brightness_work_fn = lp5562_led_brightness_work,
+ .run_engine = lp5562_run_engine,
+ .firmware_cb = lp5562_firmware_loaded,
+ .dev_attr_group = &lp5562_group,
+};
+
+static int lp5562_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = client->dev.platform_data;
+
+ if (!pdata) {
+ dev_err(&client->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ led = devm_kzalloc(&client->dev,
+ sizeof(*led) * pdata->num_channels, GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ chip->cl = client;
+ chip->pdata = pdata;
+ chip->cfg = &lp5562_cfg;
+
+ mutex_init(&chip->lock);
+
+ i2c_set_clientdata(client, led);
+
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
+
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_register_leds;
+
+ ret = lp55xx_register_sysfs(chip);
+ if (ret) {
+ dev_err(&client->dev, "registering sysfs failed\n");
+ goto err_register_sysfs;
+ }
+
+ return 0;
+
+err_register_sysfs:
+ lp55xx_unregister_leds(led, chip);
+err_register_leds:
+ lp55xx_deinit_device(chip);
+err_init:
+ return ret;
+}
+
+static int lp5562_remove(struct i2c_client *client)
+{
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
+
+ lp5562_stop_engine(chip);
+
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_unregister_leds(led, chip);
+ lp55xx_deinit_device(chip);
+
+ return 0;
+}
+
+static const struct i2c_device_id lp5562_id[] = {
+ { "lp5562", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp5562_id);
+
+static struct i2c_driver lp5562_driver = {
+ .driver = {
+ .name = "lp5562",
+ },
+ .probe = lp5562_probe,
+ .remove = lp5562_remove,
+ .id_table = lp5562_id,
+};
+
+module_i2c_driver(lp5562_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff