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leds-lp55xx: code refactoring on selftest function 

LP5521 and LP5523 have a selftest function which is run via the sysfs.
 Use lp55xx driver data and R/W functions rather than lp5521/5523 private data
 and functions.
 Additionally, if-statements are changed for code simplicity.
 Unused functions, lp5521/5523_read() are removed.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Milo(Woogyom) Kim 2013-02-05 19:21:43 +09:00 committed by Bryan Wu
parent e73c0ce6be
commit 9ca3bd8022
2 changed files with 31 additions and 52 deletions
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30
drivers/leds/leds-lp5521.c
View File

@ -168,18 +168,6 @@ static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value)
return i2c_smbus_write_byte_data(client, reg, value);
}
static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf)
{
s32 ret;
ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0)
return ret;
*buf = ret;
return 0;
}
static void lp5521_load_engine(struct lp55xx_chip *chip)
{
enum lp55xx_engine_index idx = chip->engine_idx;
@ -378,19 +366,23 @@ static int lp5521_post_init_device(struct lp55xx_chip *chip)
return 0;
}
static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf)
static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf)
{
struct lp55xx_platform_data *pdata = chip->pdata;
int ret;
u8 status;
ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status);
ret = lp55xx_read(chip, LP5521_REG_STATUS, &status);
if (ret < 0)
return ret;
if (pdata->clock_mode != LP55XX_CLOCK_EXT)
return 0;
/* Check that ext clock is really in use if requested */
if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT)
if ((status & LP5521_EXT_CLK_USED) == 0)
return -EIO;
if ((status & LP5521_EXT_CLK_USED) == 0)
return -EIO;
return 0;
}
@ -410,8 +402,8 @@ static ssize_t lp5521_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lp5521_chip *chip = i2c_get_clientdata(client);
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);

53
drivers/leds/leds-lp5523.c
View File

@ -178,17 +178,6 @@ static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
return i2c_smbus_write_byte_data(client, reg, value);
}
static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
{
s32 ret = i2c_smbus_read_byte_data(client, reg);
if (ret < 0)
return ret;
*buf = ret;
return 0;
}
static int lp5523_post_init_device(struct lp55xx_chip *chip)
{
int ret;
@ -376,35 +365,35 @@ static ssize_t lp5523_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lp5523_chip *chip = i2c_get_clientdata(client);
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
struct lp55xx_chip *chip = led->chip;
struct lp55xx_platform_data *pdata = chip->pdata;
int i, ret, pos = 0;
int led = 0;
u8 status, adc, vdd;
mutex_lock(&chip->lock);
ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
/* Check that ext clock is really in use if requested */
if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT))
if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
if ((status & LP5523_EXT_CLK_USED) == 0)
goto fail;
}
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | 16);
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd);
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
if (ret < 0)
goto fail;
@ -412,41 +401,39 @@ static ssize_t lp5523_selftest(struct device *dev,
for (i = 0; i < LP5523_MAX_LEDS; i++) {
/* Skip non-existing channels */
if (chip->pdata->led_config[i].led_current == 0)
if (pdata->led_config[i].led_current == 0)
continue;
/* Set default current */
lp5523_write(chip->client,
LP5523_REG_LED_CURRENT_BASE + i,
chip->pdata->led_config[i].led_current);
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
pdata->led_config[i].led_current);
lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff);
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
/* let current stabilize 2 - 4ms before measurements start */
usleep_range(2000, 4000);
lp5523_write(chip->client,
LP5523_REG_LED_TEST_CTRL,
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
LP5523_EN_LEDTEST | i);
/* ADC conversion time is 2.7 ms typically */
usleep_range(3000, 6000);
ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status);
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
if (ret < 0)
goto fail;
if (!(status & LP5523_LEDTEST_DONE))
usleep_range(3000, 6000);/* Was not ready. Wait. */
ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc);
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
if (ret < 0)
goto fail;
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
pos += sprintf(buf + pos, "LED %d FAIL\n", i);
lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00);
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
/* Restore current */
lp5523_write(chip->client,
LP5523_REG_LED_CURRENT_BASE + i,
chip->leds[led].led_current);
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
led->led_current);
led++;
}
if (pos == 0)