leds-lp55xx: clean up _remove()

 Replace lp5521/5523_unregister_sysfs() with lp55xx_unregister_sysfs().

 On unloading the driver, running engines should be stopped.
 Use explicit driver function, lp5521/5523_stop_engine().

 Unused functions are removed.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-lp5521.c

@@ -412,36 +412,6 @@ static ssize_t lp5521_selftest(struct device *dev,
 	return sprintf(buf, "%s\n", ret ? "FAIL" : "OK");
 }
 
-static void lp5521_clear_program_memory(struct i2c_client *cl)
-{
-	int i;
-	u8 rgb_mem[] = {
-		LP5521_REG_R_PROG_MEM,
-		LP5521_REG_G_PROG_MEM,
-		LP5521_REG_B_PROG_MEM,
-	};
-
-	for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) {
-		lp5521_write(cl, rgb_mem[i], 0);
-		lp5521_write(cl, rgb_mem[i] + 1, 0);
-	}
-}
-
-static void lp5521_write_program_memory(struct i2c_client *cl,
-				u8 base, u8 *rgb, int size)
-{
-	int i;
-
-	if (!rgb || size <= 0)
-		return;
-
-	for (i = 0; i < size; i++)
-		lp5521_write(cl, base + i, *(rgb + i));
-
-	lp5521_write(cl, base + i, 0);
-	lp5521_write(cl, base + i + 1, 0);
-}
-
 static inline struct lp5521_led_pattern *lp5521_get_pattern
 					(struct lp5521_chip *chip, u8 offset)
 {
@@ -450,42 +420,6 @@ static inline struct lp5521_led_pattern *lp5521_get_pattern
 	return ptn;
 }
 
-static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip)
-{
-	struct lp5521_led_pattern *ptn;
-	struct i2c_client *cl = chip->client;
-	int num_patterns = chip->pdata->num_patterns;
-
-	if (mode > num_patterns || !(chip->pdata->patterns))
-		return;
-
-	if (mode == PATTERN_OFF) {
-		lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
-		usleep_range(1000, 2000);
-		lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
-	} else {
-		ptn = lp5521_get_pattern(chip, mode);
-		if (!ptn)
-			return;
-
-		lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
-		usleep_range(1000, 2000);
-
-		lp5521_clear_program_memory(cl);
-
-		lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM,
-					ptn->r, ptn->size_r);
-		lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM,
-					ptn->g, ptn->size_g);
-		lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM,
-					ptn->b, ptn->size_b);
-
-		lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN);
-		usleep_range(1000, 2000);
-		lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
-	}
-}
-
 /* device attributes */
 static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL);
 
@@ -498,13 +432,6 @@ static const struct attribute_group lp5521_group = {
 	.attrs = lp5521_attributes,
 };
 
-static void lp5521_unregister_sysfs(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-
-	sysfs_remove_group(&dev->kobj, &lp5521_group);
-}
-
 /* Chip specific configurations */
 static struct lp55xx_device_config lp5521_cfg = {
 	.reset = {
@@ -582,13 +509,11 @@ err_init:
 
 static int lp5521_remove(struct i2c_client *client)
 {
-	struct lp5521_chip *old_chip = i2c_get_clientdata(client);
 	struct lp55xx_led *led = i2c_get_clientdata(client);
 	struct lp55xx_chip *chip = led->chip;
 
-	lp5521_run_led_pattern(PATTERN_OFF, old_chip);
-	lp5521_unregister_sysfs(client);
-
+	lp5521_stop_engine(chip);
+	lp55xx_unregister_sysfs(chip);
 	lp55xx_unregister_leds(led, chip);
 	lp55xx_deinit_device(chip);
 

drivers/leds/leds-lp5523.c

@@ -173,11 +173,6 @@ static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
 		led_current);
 }
 
-static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
-{
-	return i2c_smbus_write_byte_data(client, reg, value);
-}
-
 static int lp5523_post_init_device(struct lp55xx_chip *chip)
 {
 	int ret;
@@ -471,13 +466,6 @@ static const struct attribute_group lp5523_group = {
 	.attrs = lp5523_attributes,
 };
 
-static void lp5523_unregister_sysfs(struct i2c_client *client)
-{
-	struct device *dev = &client->dev;
-
-	sysfs_remove_group(&dev->kobj, &lp5523_group);
-}
-
 /* Chip specific configurations */
 static struct lp55xx_device_config lp5523_cfg = {
 	.reset = {
@@ -558,11 +546,8 @@ static int lp5523_remove(struct i2c_client *client)
 	struct lp55xx_led *led = i2c_get_clientdata(client);
 	struct lp55xx_chip *chip = led->chip;
 
-	/* Disable engine mode */
-	lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
-
-	lp5523_unregister_sysfs(client);
-
+	lp5523_stop_engine(chip);
+	lp55xx_unregister_sysfs(chip);
 	lp55xx_unregister_leds(led, chip);
 	lp55xx_deinit_device(chip);