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yaml
---
r: 358588
b: refs/heads/master
c: 944f7b1
h: refs/heads/master
v: v3
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Milo(Woogyom) Kim authored and Bryan Wu committed Feb 6, 2013
1 parent 3a27c93 commit 1f6298b
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Showing 3 changed files with 85 additions and 66 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 8a4529a38d38f53657769b942f6fc5d34f2c64b5
refs/heads/master: 944f7b1dedb859f76a88c8d34ce23a90bf6285a0
102 changes: 56 additions & 46 deletions trunk/drivers/leds/leds-lp5521.c
Original file line number Diff line number Diff line change
Expand Up @@ -687,6 +687,59 @@ static void lp5521_unregister_sysfs(struct i2c_client *client)
&lp5521_led_attribute_group);
}

static int lp5521_init_device(struct lp5521_chip *chip)
{
struct lp5521_platform_data *pdata = chip->pdata;
struct i2c_client *client = chip->client;
int ret;
u8 buf;

if (pdata->setup_resources) {
ret = pdata->setup_resources();
if (ret < 0)
return ret;
}

if (pdata->enable) {
pdata->enable(0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
pdata->enable(1);
usleep_range(1000, 2000); /* 500us abs min. */
}

lp5521_write(client, LP5521_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/

/*
* Make sure that the chip is reset by reading back the r channel
* current reg. This is dummy read is required on some platforms -
* otherwise further access to the R G B channels in the
* LP5521_REG_ENABLE register will not have any effect - strange!
*/
ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf);
if (ret) {
dev_err(&client->dev, "error in resetting chip\n");
return ret;
}
if (buf != LP5521_REG_R_CURR_DEFAULT) {
dev_err(&client->dev,
"unexpected data in register (expected 0x%x got 0x%x)\n",
LP5521_REG_R_CURR_DEFAULT, buf);
ret = -EINVAL;
return ret;
}
usleep_range(10000, 20000);

ret = lp5521_detect(client);
if (ret)
dev_err(&client->dev, "Chip not found\n");

return ret;
}

static int lp5521_init_led(struct lp5521_led *led,
struct i2c_client *client,
int chan, struct lp5521_platform_data *pdata)
Expand Down Expand Up @@ -742,7 +795,6 @@ static int lp5521_probe(struct i2c_client *client,
struct lp5521_chip *chip;
struct lp5521_platform_data *pdata;
int ret, i, led;
u8 buf;

chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
Expand All @@ -762,51 +814,9 @@ static int lp5521_probe(struct i2c_client *client,

chip->pdata = pdata;

if (pdata->setup_resources) {
ret = pdata->setup_resources();
if (ret < 0)
return ret;
}

if (pdata->enable) {
pdata->enable(0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
pdata->enable(1);
usleep_range(1000, 2000); /* 500us abs min. */
}

lp5521_write(client, LP5521_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/

/*
* Make sure that the chip is reset by reading back the r channel
* current reg. This is dummy read is required on some platforms -
* otherwise further access to the R G B channels in the
* LP5521_REG_ENABLE register will not have any effect - strange!
*/
ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf);
if (ret) {
dev_err(&client->dev, "error in resetting chip\n");
goto fail2;
}
if (buf != LP5521_REG_R_CURR_DEFAULT) {
dev_err(&client->dev,
"unexpected data in register (expected 0x%x got 0x%x)\n",
LP5521_REG_R_CURR_DEFAULT, buf);
ret = -EINVAL;
goto fail2;
}
usleep_range(10000, 20000);

ret = lp5521_detect(client);

if (ret) {
dev_err(&client->dev, "Chip not found\n");
goto fail2;
}
ret = lp5521_init_device(chip);
if (ret)
goto fail1;

dev_info(&client->dev, "%s programmable led chip found\n", id->name);

Expand Down
47 changes: 28 additions & 19 deletions trunk/drivers/leds/leds-lp5523.c
Original file line number Diff line number Diff line change
Expand Up @@ -896,6 +896,33 @@ static int lp5523_init_led(struct lp5523_led *led, struct device *dev,
return 0;
}

static int lp5523_init_device(struct lp5523_chip *chip)
{
struct lp5523_platform_data *pdata = chip->pdata;
struct i2c_client *client = chip->client;
int ret;

if (pdata->setup_resources) {
ret = pdata->setup_resources();
if (ret < 0)
return ret;
}

if (pdata->enable) {
pdata->enable(0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
pdata->enable(1);
usleep_range(1000, 2000); /* 500us abs min. */
}

lp5523_write(client, LP5523_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
return lp5523_detect(client);
}

static int lp5523_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
Expand All @@ -921,25 +948,7 @@ static int lp5523_probe(struct i2c_client *client,

chip->pdata = pdata;

if (pdata->setup_resources) {
ret = pdata->setup_resources();
if (ret < 0)
return ret;
}

if (pdata->enable) {
pdata->enable(0);
usleep_range(1000, 2000); /* Keep enable down at least 1ms */
pdata->enable(1);
usleep_range(1000, 2000); /* 500us abs min. */
}

lp5523_write(client, LP5523_REG_RESET, 0xff);
usleep_range(10000, 20000); /*
* Exact value is not available. 10 - 20ms
* appears to be enough for reset.
*/
ret = lp5523_detect(client);
ret = lp5523_init_device(chip);
if (ret)
goto fail1;

Expand Down

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