leds-lp55xx: use lp55xx common init function - detect
LP5521/5523 chip detection functions are replaced with lp55xx common function,
lp55xx_detect_device().
Chip dependent address and values are configurable in each driver.
In init function, chip detection is executed.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index e1f1dfc..0e27f7e 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -328,26 +328,6 @@
mutex_unlock(&chip->lock);
}
-/* Detect the chip by setting its ENABLE register and reading it back. */
-static int lp5521_detect(struct i2c_client *client)
-{
- int ret;
- u8 buf;
-
- ret = lp5521_write(client, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
- if (ret)
- return ret;
- /* enable takes 500us. 1 - 2 ms leaves some margin */
- usleep_range(1000, 2000);
- ret = lp5521_read(client, LP5521_REG_ENABLE, &buf);
- if (ret)
- return ret;
- if (buf != LP5521_ENABLE_DEFAULT)
- return -ENODEV;
-
- return 0;
-}
-
/* Set engine mode and create appropriate sysfs attributes, if required. */
static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode)
{
@@ -718,12 +698,6 @@
struct i2c_client *client = chip->client;
int ret;
- ret = lp5521_detect(client);
- if (ret) {
- dev_err(&client->dev, "Chip not found\n");
- goto err;
- }
-
ret = lp5521_configure(client);
if (ret < 0) {
dev_err(&client->dev, "error configuring chip\n");
@@ -734,7 +708,6 @@
err_config:
lp5521_deinit_device(chip);
-err:
return ret;
}
@@ -851,6 +824,10 @@
.addr = LP5521_REG_RESET,
.val = LP5521_RESET,
},
+ .enable = {
+ .addr = LP5521_REG_ENABLE,
+ .val = LP5521_ENABLE_DEFAULT,
+ },
};
static int lp5521_probe(struct i2c_client *client,
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
index 0054778..b3698e8 100644
--- a/drivers/leds/leds-lp5523.c
+++ b/drivers/leds/leds-lp5523.c
@@ -181,23 +181,6 @@
return 0;
}
-static int lp5523_detect(struct i2c_client *client)
-{
- int ret;
- u8 buf;
-
- ret = lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
- if (ret)
- return ret;
- ret = lp5523_read(client, LP5523_REG_ENABLE, &buf);
- if (ret)
- return ret;
- if (buf == 0x40)
- return 0;
- else
- return -ENODEV;
-}
-
static int lp5523_configure(struct i2c_client *client)
{
int ret = 0;
@@ -907,10 +890,6 @@
struct i2c_client *client = chip->client;
int ret;
- ret = lp5523_detect(client);
- if (ret)
- goto err;
-
ret = lp5523_configure(client);
if (ret < 0) {
dev_err(&client->dev, "error configuring chip\n");
@@ -921,7 +900,6 @@
err_config:
lp5523_deinit_device(chip);
-err:
return ret;
}
@@ -941,6 +919,10 @@
.addr = LP5523_REG_RESET,
.val = LP5523_RESET,
},
+ .enable = {
+ .addr = LP5523_REG_ENABLE,
+ .val = LP5523_ENABLE,
+ },
};
static int lp5523_probe(struct i2c_client *client,
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index bbf2bbf..6fede0b 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -30,6 +30,29 @@
lp55xx_write(chip, addr, val);
}
+static int lp55xx_detect_device(struct lp55xx_chip *chip)
+{
+ struct lp55xx_device_config *cfg = chip->cfg;
+ u8 addr = cfg->enable.addr;
+ u8 val = cfg->enable.val;
+ int ret;
+
+ ret = lp55xx_write(chip, addr, val);
+ if (ret)
+ return ret;
+
+ usleep_range(1000, 2000);
+
+ ret = lp55xx_read(chip, addr, &val);
+ if (ret)
+ return ret;
+
+ if (val != cfg->enable.val)
+ return -ENODEV;
+
+ return 0;
+}
+
int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(chip->cl, reg, val);
@@ -103,6 +126,12 @@
*/
usleep_range(10000, 20000);
+ ret = lp55xx_detect_device(chip);
+ if (ret) {
+ dev_err(dev, "device detection err: %d\n", ret);
+ goto err;
+ }
+
err:
return ret;
}
diff --git a/drivers/leds/leds-lp55xx-common.h b/drivers/leds/leds-lp55xx-common.h
index a73ee0b..8175301 100644
--- a/drivers/leds/leds-lp55xx-common.h
+++ b/drivers/leds/leds-lp55xx-common.h
@@ -31,9 +31,11 @@
/*
* struct lp55xx_device_config
* @reset : Chip specific reset command
+ * @enable : Chip specific enable command
*/
struct lp55xx_device_config {
const struct lp55xx_reg reset;
+ const struct lp55xx_reg enable;
};
/*