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-rw-r--r--drivers/staging/iio/light/tsl2583.c122
1 files changed, 58 insertions, 64 deletions
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
index d74e33bacbf9..c196a42b64a1 100644
--- a/drivers/staging/iio/light/tsl2583.c
+++ b/drivers/staging/iio/light/tsl2583.c
@@ -31,9 +31,6 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
-/* Triton register offsets */
-#define TSL258X_REG_MAX 8
-
/* Device Registers and Masks */
#define TSL258X_CNTRL 0x00
#define TSL258X_ALS_TIME 0X01
@@ -55,6 +52,7 @@
/* tsl2583 cntrl reg masks */
#define TSL258X_CNTL_ADC_ENBL 0x02
+#define TSL258X_CNTL_PWR_OFF 0x00
#define TSL258X_CNTL_PWR_ON 0x01
/* tsl2583 status reg masks */
@@ -64,6 +62,8 @@
/* Lux calculation constants */
#define TSL258X_LUX_CALC_OVER_FLOW 65535
+#define TSL2583_INTERRUPT_DISABLED 0x00
+
#define TSL2583_CHIP_ID 0x90
#define TSL2583_CHIP_ID_MASK 0xf0
@@ -95,18 +95,8 @@ struct tsl2583_chip {
int als_time_scale;
int als_saturation;
int taos_chip_status;
- u8 taos_config[8];
};
-/*
- * Initial values for device - this values can/will be changed by driver.
- * and applications as needed.
- * These values are dynamic.
- */
-static const u8 taos_config[8] = {
- 0x00, 0xee, 0x00, 0x03, 0x00, 0xFF, 0xFF, 0x00
-}; /* cntrl atime intC Athl0 Athl1 Athh0 Athh1 gain */
-
struct taos_lux {
unsigned int ratio;
unsigned int ch0;
@@ -362,16 +352,26 @@ static int taos_als_calibrate(struct iio_dev *indio_dev)
return (int)gain_trim_val;
}
+static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL258X_CMD_REG | TSL258X_CNTRL, state);
+ if (ret < 0)
+ dev_err(&chip->client->dev, "%s failed to set the power state to %d\n",
+ __func__, state);
+
+ return ret;
+}
+
/*
* Turn the device on.
* Configuration must be set before calling this function.
*/
-static int taos_chip_on(struct iio_dev *indio_dev)
+static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
{
- int i;
- int ret;
- u8 *uP;
- u8 utmp;
+ int ret, val;
int als_count;
int als_time;
struct tsl2583_chip *chip = iio_priv(indio_dev);
@@ -383,6 +383,20 @@ static int taos_chip_on(struct iio_dev *indio_dev)
return -EINVAL;
}
+ /* Power on the device; ADC off. */
+ ret = tsl2583_set_power_state(chip, TSL258X_CNTL_PWR_ON);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL258X_CMD_REG | TSL258X_INTERRUPT,
+ TSL2583_INTERRUPT_DISABLED);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s failed to disable interrupts\n",
+ __func__);
+ return ret;
+ }
+
/* determine als integration register */
als_count = (chip->taos_settings.als_time * 100 + 135) / 270;
if (!als_count)
@@ -390,62 +404,43 @@ static int taos_chip_on(struct iio_dev *indio_dev)
/* convert back to time (encompasses overrides) */
als_time = (als_count * 27 + 5) / 10;
- chip->taos_config[TSL258X_ALS_TIME] = 256 - als_count;
+
+ val = 256 - als_count;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL258X_CMD_REG | TSL258X_ALS_TIME,
+ val);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s failed to set the als time to %d\n",
+ __func__, val);
+ return ret;
+ }
/* Set the gain based on taos_settings struct */
- chip->taos_config[TSL258X_GAIN] = chip->taos_settings.als_gain;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL258X_CMD_REG | TSL258X_GAIN,
+ chip->taos_settings.als_gain);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s failed to set the gain to %d\n",
+ __func__, chip->taos_settings.als_gain);
+ return ret;
+ }
/* set chip struct re scaling and saturation */
chip->als_saturation = als_count * 922; /* 90% of full scale */
chip->als_time_scale = (als_time + 25) / 50;
- /* Power on the device; ADC off. */
- chip->taos_config[TSL258X_CNTRL] = TSL258X_CNTL_PWR_ON;
-
- /*
- * Use the following shadow copy for our delay before enabling ADC.
- * Write all the registers.
- */
- for (i = 0, uP = chip->taos_config; i < TSL258X_REG_MAX; i++) {
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL258X_CMD_REG + i,
- *uP++);
- if (ret < 0) {
- dev_err(&chip->client->dev,
- "taos_chip_on failed on reg %d.\n", i);
- return ret;
- }
- }
-
usleep_range(3000, 3500);
- /*
- * NOW enable the ADC
- * initialize the desired mode of operation
- */
- utmp = TSL258X_CNTL_PWR_ON | TSL258X_CNTL_ADC_ENBL;
- ret = i2c_smbus_write_byte_data(chip->client,
- TSL258X_CMD_REG | TSL258X_CNTRL,
- utmp);
- if (ret < 0) {
- dev_err(&chip->client->dev, "taos_chip_on failed on 2nd CTRL reg.\n");
+
+ ret = tsl2583_set_power_state(chip, TSL258X_CNTL_PWR_ON |
+ TSL258X_CNTL_ADC_ENBL);
+ if (ret < 0)
return ret;
- }
+
chip->taos_chip_status = TSL258X_CHIP_WORKING;
return ret;
}
-static int taos_chip_off(struct iio_dev *indio_dev)
-{
- struct tsl2583_chip *chip = iio_priv(indio_dev);
-
- /* turn device off */
- chip->taos_chip_status = TSL258X_CHIP_SUSPENDED;
- return i2c_smbus_write_byte_data(chip->client,
- TSL258X_CMD_REG | TSL258X_CNTRL,
- 0x00);
-}
-
/* Sysfs Interface Functions */
static ssize_t in_illuminance_input_target_show(struct device *dev,
@@ -768,7 +763,6 @@ static int taos_probe(struct i2c_client *clientp,
mutex_init(&chip->als_mutex);
chip->taos_chip_status = TSL258X_CHIP_UNKNOWN;
- memcpy(chip->taos_config, taos_config, sizeof(chip->taos_config));
ret = i2c_smbus_read_byte_data(clientp,
TSL258X_CMD_REG | TSL258X_CHIPID);
@@ -808,7 +802,7 @@ static int taos_probe(struct i2c_client *clientp,
taos_defaults(chip);
/* Make sure the chip is on */
- ret = taos_chip_on(indio_dev);
+ ret = tsl2583_chip_init_and_power_on(indio_dev);
if (ret < 0)
return ret;
@@ -825,7 +819,7 @@ static int __maybe_unused taos_suspend(struct device *dev)
mutex_lock(&chip->als_mutex);
if (chip->taos_chip_status == TSL258X_CHIP_WORKING) {
- ret = taos_chip_off(indio_dev);
+ ret = tsl2583_set_power_state(chip, TSL258X_CNTL_PWR_OFF);
chip->taos_chip_status = TSL258X_CHIP_SUSPENDED;
}
@@ -842,7 +836,7 @@ static int __maybe_unused taos_resume(struct device *dev)
mutex_lock(&chip->als_mutex);
if (chip->taos_chip_status == TSL258X_CHIP_SUSPENDED)
- ret = taos_chip_on(indio_dev);
+ ret = tsl2583_chip_init_and_power_on(indio_dev);
mutex_unlock(&chip->als_mutex);
return ret;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 17:04:52 +0000