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Message-Id: <1477648821-3786-7-git-send-email-masneyb@onstation.org>
Date: Fri, 28 Oct 2016 06:00:17 -0400
From: Brian Masney <masneyb@...tation.org>
To: jic23@...nel.org, linux-iio@...r.kernel.org
Cc: devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
lars@...afoo.de, pmeerw@...erw.net, knaack.h@....de,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
robh+dt@...nel.org, Mark.Rutland@....com
Subject: [PATCH 06/10] staging: iio: tsl2583: convert to use iio_chan_spec and {read,write}_raw
The tsl2583 driver directly creates sysfs attributes that should instead
be created by the IIO core on behalf of the driver. This patch adds the
iio_chan_spec array, the relevant info_mask elements and the read_raw()
and write_raw() functions to take advantage of features provided by the
IIO core. These sysfs attributes were migrated with this patch:
illuminance0_input, illuminance0_calibbias,
illuminance0_integration_time. This also exposes the raw values read
from the two channels on the sensor.
With this change, these four sysfs entries have their prefix changed
from illuminance0_ to in_illuminance_. This is deemed to be acceptable
since none of the IIO light drivers in mainline use the illuminance0_
prefix, however 8 of the IIO light drivers in mainline use the
in_illuminance_ prefix.
Signed-off-by: Brian Masney <masneyb@...tation.org>
---
drivers/staging/iio/light/tsl2583.c | 236 ++++++++++++++++++++++--------------
1 file changed, 143 insertions(+), 93 deletions(-)
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
index e975bba..6a61a86 100644
--- a/drivers/staging/iio/light/tsl2583.c
+++ b/drivers/staging/iio/light/tsl2583.c
@@ -211,28 +211,23 @@ static int taos_get_lux(struct iio_dev *indio_dev)
u32 ch0lux = 0;
u32 ch1lux = 0;
- if (mutex_trylock(&chip->als_mutex) == 0) {
- dev_info(&chip->client->dev, "taos_get_lux device is busy\n");
- return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
- }
-
if (chip->taos_chip_status != TSL258X_CHIP_WORKING) {
/* device is not enabled */
dev_err(&chip->client->dev, "taos_get_lux device is not enabled\n");
ret = -EBUSY;
- goto out_unlock;
+ goto done;
}
ret = taos_i2c_read(chip->client, (TSL258X_CMD_REG), &buf[0], 1);
if (ret < 0) {
dev_err(&chip->client->dev, "taos_get_lux failed to read CMD_REG\n");
- goto out_unlock;
+ goto done;
}
/* is data new & valid */
if (!(buf[0] & TSL258X_STA_ADC_INTR)) {
dev_err(&chip->client->dev, "taos_get_lux data not valid\n");
ret = chip->als_cur_info.lux; /* return LAST VALUE */
- goto out_unlock;
+ goto done;
}
for (i = 0; i < 4; i++) {
@@ -243,7 +238,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
dev_err(&chip->client->dev,
"taos_get_lux failed to read register %x\n",
reg);
- goto out_unlock;
+ goto done;
}
}
@@ -259,7 +254,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
dev_err(&chip->client->dev,
"taos_i2c_write_command failed in taos_get_lux, err = %d\n",
ret);
- goto out_unlock; /* have no data, so return failure */
+ goto done; /* have no data, so return failure */
}
/* extract ALS/lux data */
@@ -276,7 +271,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
/* have no data, so return LAST VALUE */
ret = 0;
chip->als_cur_info.lux = 0;
- goto out_unlock;
+ goto done;
}
/* calculate ratio */
ratio = (ch1 << 15) / ch0;
@@ -302,7 +297,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
dev_dbg(&chip->client->dev, "No Data - Return last value\n");
ret = 0;
chip->als_cur_info.lux = 0;
- goto out_unlock;
+ goto done;
}
/* adjust for active time scale */
@@ -334,8 +329,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
chip->als_cur_info.lux = lux;
ret = lux;
-out_unlock:
- mutex_unlock(&chip->als_mutex);
+done:
return ret;
}
@@ -575,69 +569,12 @@ static ssize_t taos_gain_available_show(struct device *dev,
return sprintf(buf, "%s\n", "1 8 16 111");
}
-static ssize_t taos_als_time_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct tsl2583_chip *chip = iio_priv(indio_dev);
-
- return sprintf(buf, "%d\n", chip->taos_settings.als_time);
-}
-
-static ssize_t taos_als_time_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct tsl2583_chip *chip = iio_priv(indio_dev);
- int value;
-
- if (kstrtoint(buf, 0, &value))
- return -EINVAL;
-
- if ((value < 50) || (value > 650))
- return -EINVAL;
-
- if (value % 50)
- return -EINVAL;
-
- chip->taos_settings.als_time = value;
-
- return len;
-}
-
static ssize_t taos_als_time_available_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%s\n",
- "50 100 150 200 250 300 350 400 450 500 550 600 650");
-}
-
-static ssize_t taos_als_trim_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct tsl2583_chip *chip = iio_priv(indio_dev);
-
- return sprintf(buf, "%d\n", chip->taos_settings.als_gain_trim);
-}
-
-static ssize_t taos_als_trim_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct tsl2583_chip *chip = iio_priv(indio_dev);
- int value;
-
- if (kstrtoint(buf, 0, &value))
- return -EINVAL;
-
- if (value)
- chip->taos_settings.als_gain_trim = value;
-
- return len;
+ "0.000050 0.000100 0.000150 0.000200 0.000250 0.000300 0.000350 0.000400 0.000450 0.000500 0.000550 0.000600 0.000650");
}
static ssize_t taos_als_cal_target_show(struct device *dev,
@@ -667,18 +604,6 @@ static ssize_t taos_als_cal_target_store(struct device *dev,
return len;
}
-static ssize_t taos_lux_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- int ret;
-
- ret = taos_get_lux(dev_to_iio_dev(dev));
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", ret);
-}
-
static ssize_t taos_do_calibrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
@@ -771,18 +696,12 @@ static DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR,
static DEVICE_ATTR(illuminance0_calibscale_available, S_IRUGO,
taos_gain_available_show, NULL);
-static DEVICE_ATTR(illuminance0_integration_time, S_IRUGO | S_IWUSR,
- taos_als_time_show, taos_als_time_store);
static DEVICE_ATTR(illuminance0_integration_time_available, S_IRUGO,
taos_als_time_available_show, NULL);
-static DEVICE_ATTR(illuminance0_calibbias, S_IRUGO | S_IWUSR,
- taos_als_trim_show, taos_als_trim_store);
-
static DEVICE_ATTR(illuminance0_input_target, S_IRUGO | S_IWUSR,
taos_als_cal_target_show, taos_als_cal_target_store);
-static DEVICE_ATTR(illuminance0_input, S_IRUGO, taos_lux_show, NULL);
static DEVICE_ATTR(illuminance0_calibrate, S_IWUSR, NULL, taos_do_calibrate);
static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR,
taos_luxtable_show, taos_luxtable_store);
@@ -790,11 +709,8 @@ static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR,
static struct attribute *sysfs_attrs_ctrl[] = {
&dev_attr_illuminance0_calibscale.attr, /* Gain */
&dev_attr_illuminance0_calibscale_available.attr,
- &dev_attr_illuminance0_integration_time.attr, /* I time*/
&dev_attr_illuminance0_integration_time_available.attr,
- &dev_attr_illuminance0_calibbias.attr, /* trim */
&dev_attr_illuminance0_input_target.attr,
- &dev_attr_illuminance0_input.attr,
&dev_attr_illuminance0_calibrate.attr,
&dev_attr_illuminance0_lux_table.attr,
NULL
@@ -810,9 +726,141 @@ static int taos_tsl258x_device(unsigned char *bufp)
return ((bufp[TSL258X_CHIPID] & 0xf0) == 0x90);
}
+static const struct iio_chan_spec tsl2583_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+};
+
+static int tsl2583_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->taos_chip_status != TSL258X_CHIP_WORKING) {
+ ret = -EBUSY;
+ goto read_done;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_LIGHT) {
+ ret = taos_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ /*
+ * From page 20 of the TSL2581, TSL2583 data
+ * sheet (TAOS134 − MARCH 2011):
+ *
+ * One of the photodiodes (channel 0) is
+ * sensitive to both visible and infrared light,
+ * while the second photodiode (channel 1) is
+ * sensitive primarily to infrared light.
+ */
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ *val = chip->als_cur_info.als_ch0;
+ else
+ *val = chip->als_cur_info.als_ch1;
+
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_PROCESSED:
+ if (chan->type == IIO_LIGHT) {
+ ret = taos_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ *val = ret;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->taos_settings.als_gain_trim;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = chip->taos_settings.als_time;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+read_done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static int tsl2583_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->taos_chip_status != TSL258X_CHIP_WORKING) {
+ ret = -EBUSY;
+ goto write_done;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ chip->taos_settings.als_gain_trim = val;
+ ret = 0;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
+ val2 <= 650 && !(val2 % 50)) {
+ chip->taos_settings.als_time = val2;
+ ret = 0;
+ }
+ break;
+ default:
+ break;
+ }
+
+write_done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
static const struct iio_info tsl2583_info = {
.attrs = &tsl2583_attribute_group,
.driver_module = THIS_MODULE,
+ .read_raw = tsl2583_read_raw,
+ .write_raw = tsl2583_write_raw,
};
/*
@@ -878,6 +926,8 @@ static int taos_probe(struct i2c_client *clientp,
}
indio_dev->info = &tsl2583_info;
+ indio_dev->channels = tsl2583_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
indio_dev->dev.parent = &clientp->dev;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->name = chip->client->name;
--
2.7.4
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