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-rw-r--r--drivers/staging/iio/cdc/ad7746.c114
-rw-r--r--drivers/staging/iio/cdc/ad7746.h28
2 files changed, 57 insertions, 85 deletions
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index eab534dc4bcc..78ac720266e6 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -18,8 +18,6 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
-#include "ad7746.h"
-
/*
* AD7746 Register Definition
*/
@@ -84,10 +82,6 @@
#define AD7746_CAPDAC_DACEN BIT(7)
#define AD7746_CAPDAC_DACP(x) ((x) & 0x7F)
-/*
- * struct ad7746_chip_info - chip specific information
- */
-
struct ad7746_chip_info {
struct i2c_client *client;
struct mutex lock; /* protect sensor state */
@@ -215,6 +209,19 @@ static const unsigned char ad7746_cap_filter_rate_table[][2] = {
{16, 62 + 1}, {13, 77 + 1}, {11, 92 + 1}, {9, 110 + 1},
};
+static int ad7746_set_capdac(struct ad7746_chip_info *chip, int channel)
+{
+ int ret = i2c_smbus_write_byte_data(chip->client,
+ AD7746_REG_CAPDACA,
+ chip->capdac[channel][0]);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(chip->client,
+ AD7746_REG_CAPDACB,
+ chip->capdac[channel][1]);
+}
+
static int ad7746_select_channel(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan)
{
@@ -230,17 +237,11 @@ static int ad7746_select_channel(struct iio_dev *indio_dev,
AD7746_CONF_CAPFS_SHIFT;
delay = ad7746_cap_filter_rate_table[idx][1];
+ ret = ad7746_set_capdac(chip, chan->channel);
+ if (ret < 0)
+ return ret;
+
if (chip->capdac_set != chan->channel) {
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_CAPDACA,
- chip->capdac[chan->channel][0]);
- if (ret < 0)
- return ret;
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_CAPDACB,
- chip->capdac[chan->channel][1]);
- if (ret < 0)
- return ret;
chip->capdac_set = chan->channel;
}
@@ -484,14 +485,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev,
chip->capdac[chan->channel][chan->differential] = val > 0 ?
AD7746_CAPDAC_DACP(val) | AD7746_CAPDAC_DACEN : 0;
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_CAPDACA,
- chip->capdac[chan->channel][0]);
- if (ret < 0)
- goto out;
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_CAPDACB,
- chip->capdac[chan->channel][1]);
+ ret = ad7746_set_capdac(chip, chan->channel);
if (ret < 0)
goto out;
@@ -564,10 +558,10 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
switch (chan->type) {
case IIO_TEMP:
- /*
- * temperature in milli degrees Celsius
- * T = ((*val / 2048) - 4096) * 1000
- */
+ /*
+ * temperature in milli degrees Celsius
+ * T = ((*val / 2048) - 4096) * 1000
+ */
*val = (*val * 125) / 256;
break;
case IIO_VOLTAGE:
@@ -669,18 +663,15 @@ static const struct iio_info ad7746_info = {
.write_raw = ad7746_write_raw,
};
-/*
- * device probe and remove
- */
-
static int ad7746_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct ad7746_platform_data *pdata = client->dev.platform_data;
+ struct device *dev = &client->dev;
struct ad7746_chip_info *chip;
struct iio_dev *indio_dev;
unsigned char regval = 0;
- int ret = 0;
+ unsigned int vdd_permille;
+ int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
if (!indio_dev)
@@ -702,26 +693,39 @@ static int ad7746_probe(struct i2c_client *client,
indio_dev->num_channels = ARRAY_SIZE(ad7746_channels) - 2;
indio_dev->modes = INDIO_DIRECT_MODE;
- if (pdata) {
- if (pdata->exca_en) {
- if (pdata->exca_inv_en)
- regval |= AD7746_EXCSETUP_NEXCA;
- else
- regval |= AD7746_EXCSETUP_EXCA;
- }
+ if (device_property_read_bool(dev, "adi,exca-output-en")) {
+ if (device_property_read_bool(dev, "adi,exca-output-invert"))
+ regval |= AD7746_EXCSETUP_NEXCA;
+ else
+ regval |= AD7746_EXCSETUP_EXCA;
+ }
- if (pdata->excb_en) {
- if (pdata->excb_inv_en)
- regval |= AD7746_EXCSETUP_NEXCB;
- else
- regval |= AD7746_EXCSETUP_EXCB;
- }
+ if (device_property_read_bool(dev, "adi,excb-output-en")) {
+ if (device_property_read_bool(dev, "adi,excb-output-invert"))
+ regval |= AD7746_EXCSETUP_NEXCB;
+ else
+ regval |= AD7746_EXCSETUP_EXCB;
+ }
- regval |= AD7746_EXCSETUP_EXCLVL(pdata->exclvl);
- } else {
- dev_warn(&client->dev, "No platform data? using default\n");
- regval = AD7746_EXCSETUP_EXCA | AD7746_EXCSETUP_EXCB |
- AD7746_EXCSETUP_EXCLVL(3);
+ ret = device_property_read_u32(dev, "adi,excitation-vdd-permille",
+ &vdd_permille);
+ if (!ret) {
+ switch (vdd_permille) {
+ case 125:
+ regval |= AD7746_EXCSETUP_EXCLVL(0);
+ break;
+ case 250:
+ regval |= AD7746_EXCSETUP_EXCLVL(1);
+ break;
+ case 375:
+ regval |= AD7746_EXCSETUP_EXCLVL(2);
+ break;
+ case 500:
+ regval |= AD7746_EXCSETUP_EXCLVL(3);
+ break;
+ default:
+ break;
+ }
}
ret = i2c_smbus_write_byte_data(chip->client,
@@ -729,11 +733,7 @@ static int ad7746_probe(struct i2c_client *client,
if (ret < 0)
return ret;
- ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
- if (ret)
- return ret;
-
- return 0;
+ return devm_iio_device_register(indio_dev->dev.parent, indio_dev);
}
static const struct i2c_device_id ad7746_id[] = {
diff --git a/drivers/staging/iio/cdc/ad7746.h b/drivers/staging/iio/cdc/ad7746.h
deleted file mode 100644
index 8bdbd732dbbd..000000000000
--- a/drivers/staging/iio/cdc/ad7746.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * AD7746 capacitive sensor driver supporting AD7745, AD7746 and AD7747
- *
- * Copyright 2011 Analog Devices Inc.
- */
-
-#ifndef IIO_CDC_AD7746_H_
-#define IIO_CDC_AD7746_H_
-
-/*
- * TODO: struct ad7746_platform_data needs to go into include/linux/iio
- */
-
-#define AD7466_EXCLVL_0 0 /* +-VDD/8 */
-#define AD7466_EXCLVL_1 1 /* +-VDD/4 */
-#define AD7466_EXCLVL_2 2 /* +-VDD * 3/8 */
-#define AD7466_EXCLVL_3 3 /* +-VDD/2 */
-
-struct ad7746_platform_data {
- unsigned char exclvl; /*Excitation Voltage Level */
- bool exca_en; /* enables EXCA pin as the excitation output */
- bool exca_inv_en; /* enables /EXCA pin as the excitation output */
- bool excb_en; /* enables EXCB pin as the excitation output */
- bool excb_inv_en; /* enables /EXCB pin as the excitation output */
-};
-
-#endif /* IIO_CDC_AD7746_H_ */
generated by cgit (git 2.34.1) at 2024-07-01 07:23:21 +0000