[PATCH v2 14/14] staging: iio: Remove ad7746 from staging

From: HernÃn Gonzalez
Date: Fri Apr 13 2018 - 12:39:27 EST

Signed-off-by: HernÃn Gonzalez <hernan@xxxxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/staging/iio/cdc/ad7746.txt | 34 -
drivers/staging/iio/cdc/Kconfig | 10 -
drivers/staging/iio/cdc/Makefile | 1 -
drivers/staging/iio/cdc/ad7746.c | 856 ---------------------
drivers/staging/iio/cdc/ad7746.h | 24 -
5 files changed, 925 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
delete mode 100644 drivers/staging/iio/cdc/ad7746.c
delete mode 100644 drivers/staging/iio/cdc/ad7746.h

diff --git a/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt b/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
deleted file mode 100644
index 7740f05..0000000
--- a/Documentation/devicetree/bindings/staging/iio/cdc/ad7746.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-Analog Devices AD7746/5/7 capacitive sensor driver
-
-Required properties:
- - compatible: Should be one of
- * "adi,ad7745"
- * "adi,ad7746"
- * "adi,ad7747"
- - reg: The 7-bits long I2c address of the device
-
-Optional properties:
- - adi,exclvl: This property defines the excitation voltage level for the
- capacitance to be measured. Possible values are:
- * 0 = +-VDD/8
- * 1 = +-VDD/4
- * 2 = +-VDD * 3/8
- * 3 = +-VDD/2 (Default)
- - adi,nexca_en: Invert excitation output A.
- - adi,nexcb_en: Invert excitation output B.
-
-Example:
-Here exclvl would be 1 (VDD/4), Excitation pin A would be inverted and
-Excitation pin B would NOT be inverted.
-
-i2c2 {
-
- < . . . >
-
- ad7746: ad7746@60 {
- compatible = "ad7746";
- reg = <0x60>;
- adi,exclvl = <1>;
- adi,nexca_en;
- };
-};
diff --git a/drivers/staging/iio/cdc/Kconfig b/drivers/staging/iio/cdc/Kconfig
index 80211df..a170ab3 100644
--- a/drivers/staging/iio/cdc/Kconfig
+++ b/drivers/staging/iio/cdc/Kconfig
@@ -23,14 +23,4 @@ config AD7152
To compile this driver as a module, choose M here: the
module will be called ad7152.

-config AD7746
- tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"
- depends on I2C
- help
- Say yes here to build support for Analog Devices capacitive sensors.
- (AD7745, AD7746, AD7747) Provides direct access via sysfs.
-
- To compile this driver as a module, choose M here: the
- module will be called ad7746.
-
endmenu
diff --git a/drivers/staging/iio/cdc/Makefile b/drivers/staging/iio/cdc/Makefile
index a5fbabf..5db1acd 100644
--- a/drivers/staging/iio/cdc/Makefile
+++ b/drivers/staging/iio/cdc/Makefile
@@ -4,4 +4,3 @@

obj-$(CONFIG_AD7150) += ad7150.o
obj-$(CONFIG_AD7152) += ad7152.o
-obj-$(CONFIG_AD7746) += ad7746.o
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
deleted file mode 100644
index ef0ebb5..0000000
--- a/drivers/staging/iio/cdc/ad7746.c
+++ /dev/null
@@ -1,856 +0,0 @@
-/*
- * AD7746 capacitive sensor driver supporting AD7745, AD7746 and AD7747
- *
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/stat.h>
-#include <linux/sysfs.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-
-#include "ad7746.h"
-
-/*
- * AD7746 Register Definition
- */
-
-#define AD7746_REG_CAP_DATA_HIGH 1
-#define AD7746_REG_VT_DATA_HIGH 4
-#define AD7746_REG_CAP_SETUP 7
-#define AD7746_REG_VT_SETUP 8
-#define AD7746_REG_EXC_SETUP 9
-#define AD7746_REG_CFG 10
-#define AD7746_REG_CAPDACA 11
-#define AD7746_REG_CAPDACB 12
-#define AD7746_REG_CAP_OFFH 13
-#define AD7746_REG_CAP_GAINH 15
-#define AD7746_REG_VOLT_GAINH 17
-
-/* Capacitive Channel Setup Register Bit Designations (AD7746_REG_CAP_SETUP) */
-#define AD7746_CAPSETUP_CAPEN BIT(7)
-#define AD7746_CAPSETUP_CIN2 BIT(6) /* AD7746 only */
-#define AD7746_CAPSETUP_CAPDIFF BIT(5)
-#define AD7746_CAPSETUP_CACHOP BIT(0)
-
-/* Voltage/Temperature Setup Register Bit Designations (AD7746_REG_VT_SETUP) */
-#define AD7746_VTSETUP_VTEN (1 << 7)
-#define AD7746_VTSETUP_VTMD_INT_TEMP (0 << 5)
-#define AD7746_VTSETUP_VTMD_EXT_TEMP (1 << 5)
-#define AD7746_VTSETUP_VTMD_VDD_MON (2 << 5)
-#define AD7746_VTSETUP_VTMD_EXT_VIN (3 << 5)
-#define AD7746_VTSETUP_EXTREF BIT(4)
-#define AD7746_VTSETUP_VTSHORT BIT(1)
-#define AD7746_VTSETUP_VTCHOP BIT(0)
-
-/* Excitation Setup Register Bit Designations (AD7746_REG_EXC_SETUP) */
-#define AD7746_EXCSETUP_CLKCTRL BIT(7)
-#define AD7746_EXCSETUP_EXCON BIT(6)
-#define AD7746_EXCSETUP_EXCB BIT(5)
-#define AD7746_EXCSETUP_NEXCB BIT(4)
-#define AD7746_EXCSETUP_EXCA BIT(3)
-#define AD7746_EXCSETUP_NEXCA BIT(2)
-#define AD7746_EXCSETUP_EXCLVL(x) (((x) & 0x3) << 0)
-
-/* Config Register Bit Designations (AD7746_REG_CFG) */
-#define AD7746_CONF_VTFS_SHIFT 6
-#define AD7746_CONF_CAPFS_SHIFT 3
-#define AD7746_CONF_VTFS_MASK GENMASK(7, 6)
-#define AD7746_CONF_CAPFS_MASK GENMASK(5, 3)
-#define AD7746_CONF_MODE_IDLE (0 << 0)
-#define AD7746_CONF_MODE_CONT_CONV (1 << 0)
-#define AD7746_CONF_MODE_SINGLE_CONV (2 << 0)
-#define AD7746_CONF_MODE_PWRDN (3 << 0)
-#define AD7746_CONF_MODE_OFFS_CAL (5 << 0)
-#define AD7746_CONF_MODE_GAIN_CAL (6 << 0)
-
-/* CAPDAC Register Bit Designations (AD7746_REG_CAPDACx) */
-#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 */
- /*
- * Capacitive channel digital filter setup;
- * conversion time/update rate setup per channel
- */
- u8 config;
- u8 cap_setup;
- u8 vt_setup;
- u8 capdac[2][2];
- s8 capdac_set;
-
- union {
- __be32 d32;
- u8 d8[4];
- } data ____cacheline_aligned;
-};
-
-enum ad7746_chan {
- VIN,
- VIN_VDD,
- TEMP_INT,
- TEMP_EXT,
- CIN1,
- CIN1_DIFF,
- CIN2,
- CIN2_DIFF,
-};
-
-static const struct iio_chan_spec ad7746_channels[] = {
- [VIN] = {
- .type = IIO_VOLTAGE,
- .indexed = 1,
- .channel = 0,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
- BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_VT_DATA_HIGH << 8 |
- AD7746_VTSETUP_VTMD_EXT_VIN,
- },
- [VIN_VDD] = {
- .type = IIO_VOLTAGE,
- .indexed = 1,
- .channel = 1,
- .extend_name = "supply",
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
- BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_VT_DATA_HIGH << 8 |
- AD7746_VTSETUP_VTMD_VDD_MON,
- },
- [TEMP_INT] = {
- .type = IIO_TEMP,
- .indexed = 1,
- .channel = 0,
- .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
- .address = AD7746_REG_VT_DATA_HIGH << 8 |
- AD7746_VTSETUP_VTMD_INT_TEMP,
- },
- [TEMP_EXT] = {
- .type = IIO_TEMP,
- .indexed = 1,
- .channel = 1,
- .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
- .address = AD7746_REG_VT_DATA_HIGH << 8 |
- AD7746_VTSETUP_VTMD_EXT_TEMP,
- },
- [CIN1] = {
- .type = IIO_CAPACITANCE,
- .indexed = 1,
- .channel = 0,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
- BIT(IIO_CHAN_INFO_CALIBSCALE) | BIT(IIO_CHAN_INFO_OFFSET),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBBIAS) |
- BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_CAP_DATA_HIGH << 8,
- },
- [CIN1_DIFF] = {
- .type = IIO_CAPACITANCE,
- .differential = 1,
- .indexed = 1,
- .channel = 0,
- .channel2 = 2,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
- BIT(IIO_CHAN_INFO_CALIBSCALE) | BIT(IIO_CHAN_INFO_OFFSET),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBBIAS) |
- BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_CAP_DATA_HIGH << 8 |
- AD7746_CAPSETUP_CAPDIFF
- },
- [CIN2] = {
- .type = IIO_CAPACITANCE,
- .indexed = 1,
- .channel = 1,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
- BIT(IIO_CHAN_INFO_CALIBSCALE) | BIT(IIO_CHAN_INFO_OFFSET),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBBIAS) |
- BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_CAP_DATA_HIGH << 8 |
- AD7746_CAPSETUP_CIN2,
- },
- [CIN2_DIFF] = {
- .type = IIO_CAPACITANCE,
- .differential = 1,
- .indexed = 1,
- .channel = 1,
- .channel2 = 3,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
- BIT(IIO_CHAN_INFO_CALIBSCALE) | BIT(IIO_CHAN_INFO_OFFSET),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBBIAS) |
- BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_SAMP_FREQ),
- .address = AD7746_REG_CAP_DATA_HIGH << 8 |
- AD7746_CAPSETUP_CAPDIFF | AD7746_CAPSETUP_CIN2,
- }
-};
-
-/* Values are Update Rate (Hz), Conversion Time (ms) + 1*/
-static const unsigned char ad7746_vt_filter_rate_table[][2] = {
- {50, 20 + 1}, {31, 32 + 1}, {16, 62 + 1}, {8, 122 + 1},
-};
-
-static const unsigned char ad7746_cap_filter_rate_table[][2] = {
- {91, 11 + 1}, {84, 12 + 1}, {50, 20 + 1}, {26, 38 + 1},
- {16, 62 + 1}, {13, 77 + 1}, {11, 92 + 1}, {9, 110 + 1},
-};
-
-static int ad7746_select_channel(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan)
-{
- struct ad7746_chip_info *chip = iio_priv(indio_dev);
- u8 vt_setup, cap_setup;
- int ret, delay, idx;
-
- switch (chan->type) {
- case IIO_CAPACITANCE:
- cap_setup = (chan->address & 0xFF) | AD7746_CAPSETUP_CAPEN;
- vt_setup = chip->vt_setup & ~AD7746_VTSETUP_VTEN;
- idx = (chip->config & AD7746_CONF_CAPFS_MASK) >>
- AD7746_CONF_CAPFS_SHIFT;
- delay = ad7746_cap_filter_rate_table[idx][1];
-
- 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;
- }
- break;
- case IIO_VOLTAGE:
- case IIO_TEMP:
- vt_setup = (chan->address & 0xFF) | AD7746_VTSETUP_VTEN;
- cap_setup = chip->cap_setup & ~AD7746_CAPSETUP_CAPEN;
- idx = (chip->config & AD7746_CONF_VTFS_MASK) >>
- AD7746_CONF_VTFS_SHIFT;
- delay = ad7746_cap_filter_rate_table[idx][1];
- break;
- default:
- return -EINVAL;
- }
-
- if (chip->cap_setup != cap_setup) {
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_CAP_SETUP,
- cap_setup);
- if (ret < 0)
- return ret;
-
- chip->cap_setup = cap_setup;
- }
-
- if (chip->vt_setup != vt_setup) {
- ret = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_VT_SETUP,
- vt_setup);
- if (ret < 0)
- return ret;
-
- chip->vt_setup = vt_setup;
- }
-
- return delay;
-}
-
-static inline ssize_t ad7746_start_calib(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len,
- u8 regval)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct ad7746_chip_info *chip = iio_priv(indio_dev);
- int ret, timeout = 10;
- bool doit;
-
- ret = strtobool(buf, &doit);
- if (ret < 0)
- return ret;
-
- if (!doit)
- return 0;
-
- mutex_lock(&chip->lock);
- regval |= chip->config;
- ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval);
- if (ret < 0)
- goto unlock;
-
- do {
- msleep(20);
- ret = i2c_smbus_read_byte_data(chip->client, AD7746_REG_CFG);
- if (ret < 0)
- goto unlock;
-
- } while ((ret == regval) && timeout--);
-
- mutex_unlock(&chip->lock);
-
- return len;
-
-unlock:
- mutex_unlock(&chip->lock);
- return ret;
-}
-
-static ssize_t ad7746_start_offset_calib(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- int ret = ad7746_select_channel(indio_dev,
- &ad7746_channels[to_iio_dev_attr(attr)->address]);
- if (ret < 0)
- return ret;
-
- return ad7746_start_calib(dev, attr, buf, len,
- AD7746_CONF_MODE_OFFS_CAL);
-}
-
-static ssize_t ad7746_start_gain_calib(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- int ret = ad7746_select_channel(indio_dev,
- &ad7746_channels[to_iio_dev_attr(attr)->address]);
- if (ret < 0)
- return ret;
-
- return ad7746_start_calib(dev, attr, buf, len,
- AD7746_CONF_MODE_GAIN_CAL);
-}
-
-static IIO_DEVICE_ATTR(in_capacitance0_calibbias_calibration,
- 0200, NULL, ad7746_start_offset_calib, CIN1);
-static IIO_DEVICE_ATTR(in_capacitance1_calibbias_calibration,
- 0200, NULL, ad7746_start_offset_calib, CIN2);
-static IIO_DEVICE_ATTR(in_capacitance0_calibscale_calibration,
- 0200, NULL, ad7746_start_gain_calib, CIN1);
-static IIO_DEVICE_ATTR(in_capacitance1_calibscale_calibration,
- 0200, NULL, ad7746_start_gain_calib, CIN2);
-static IIO_DEVICE_ATTR(in_voltage0_calibscale_calibration,
- 0200, NULL, ad7746_start_gain_calib, VIN);
-
-static int ad7746_store_cap_filter_rate_setup(struct ad7746_chip_info *chip,
- int val)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(ad7746_cap_filter_rate_table); i++)
- if (val >= ad7746_cap_filter_rate_table[i][0])
- break;
-
- if (i >= ARRAY_SIZE(ad7746_cap_filter_rate_table))
- i = ARRAY_SIZE(ad7746_cap_filter_rate_table) - 1;
-
- chip->config &= ~AD7746_CONF_CAPFS_MASK;
- chip->config |= i << AD7746_CONF_CAPFS_SHIFT;
-
- return 0;
-}
-
-static int ad7746_store_vt_filter_rate_setup(struct ad7746_chip_info *chip,
- int val)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(ad7746_vt_filter_rate_table); i++)
- if (val >= ad7746_vt_filter_rate_table[i][0])
- break;
-
- if (i >= ARRAY_SIZE(ad7746_vt_filter_rate_table))
- i = ARRAY_SIZE(ad7746_vt_filter_rate_table) - 1;
-
- chip->config &= ~AD7746_CONF_VTFS_MASK;
- chip->config |= i << AD7746_CONF_VTFS_SHIFT;
-
- return 0;
-}
-
-static IIO_CONST_ATTR(in_voltage_sampling_frequency_available, "50 31 16 8");
-static IIO_CONST_ATTR(in_capacitance_sampling_frequency_available,
- "91 84 50 26 16 13 11 9");
-
-static struct attribute *ad7746_attributes[] = {
- &iio_dev_attr_in_capacitance0_calibbias_calibration.dev_attr.attr,
- &iio_dev_attr_in_capacitance0_calibscale_calibration.dev_attr.attr,
- &iio_dev_attr_in_capacitance1_calibscale_calibration.dev_attr.attr,
- &iio_dev_attr_in_capacitance1_calibbias_calibration.dev_attr.attr,
- &iio_dev_attr_in_voltage0_calibscale_calibration.dev_attr.attr,
- &iio_const_attr_in_voltage_sampling_frequency_available.dev_attr.attr,
- &iio_const_attr_in_capacitance_sampling_frequency_available.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ad7746_attribute_group = {
- .attrs = ad7746_attributes,
-};
-
-static int ad7746_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val,
- int val2,
- long mask)
-{
- struct ad7746_chip_info *chip = iio_priv(indio_dev);
- int ret, reg;
-
- mutex_lock(&chip->lock);
-
- switch (mask) {
- case IIO_CHAN_INFO_CALIBSCALE:
- if (val != 1) {
- ret = -EINVAL;
- goto out;
- }
-
- /* 2^16 in micro */
- val = (val2 * 1024) / 15625;
-
- switch (chan->type) {
- case IIO_CAPACITANCE:
- reg = AD7746_REG_CAP_GAINH;
- break;
- case IIO_VOLTAGE:
- reg = AD7746_REG_VOLT_GAINH;
- break;
- default:
- ret = -EINVAL;
- goto out;
- }
-
- ret = i2c_smbus_write_word_swapped(chip->client, reg, val);
- if (ret < 0)
- goto out;
-
- ret = 0;
- break;
- case IIO_CHAN_INFO_CALIBBIAS:
- if (val < 0 || val > 0xFFFF) {
- ret = -EINVAL;
- goto out;
- }
- ret = i2c_smbus_write_word_swapped(chip->client,
- AD7746_REG_CAP_OFFH, val);
- if (ret < 0)
- goto out;
-
- ret = 0;
- break;
- case IIO_CHAN_INFO_OFFSET:
- if (val < 0 || val > 43008000) { /* 21pF */
- ret = -EINVAL;
- goto out;
- }
-
- /*
- * CAPDAC Scale = 21pF_typ / 127
- * CIN Scale = 8.192pF / 2^24
- * Offset Scale = CAPDAC Scale / CIN Scale = 338646
- */
-
- val /= 338646;
-
- 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]);
- if (ret < 0)
- goto out;
-
- chip->capdac_set = chan->channel;
-
- ret = 0;
- break;
- case IIO_CHAN_INFO_SAMP_FREQ:
- if (val2) {
- ret = -EINVAL;
- goto out;
- }
-
- switch (chan->type) {
- case IIO_CAPACITANCE:
- ret = ad7746_store_cap_filter_rate_setup(chip, val);
- break;
- case IIO_VOLTAGE:
- ret = ad7746_store_vt_filter_rate_setup(chip, val);
- break;
- default:
- ret = -EINVAL;
- }
- break;
- default:
- ret = -EINVAL;
- }
-
-out:
- mutex_unlock(&chip->lock);
- return ret;
-}
-
-static int ad7746_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2,
- long mask)
-{
- struct ad7746_chip_info *chip = iio_priv(indio_dev);
- int ret, delay, idx;
- u8 regval, reg;
-
- mutex_lock(&chip->lock);
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- case IIO_CHAN_INFO_PROCESSED:
- ret = ad7746_select_channel(indio_dev, chan);
- if (ret < 0)
- goto out;
- delay = ret;
-
- regval = chip->config | AD7746_CONF_MODE_SINGLE_CONV;
- ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG,
- regval);
- if (ret < 0)
- goto out;
-
- msleep(delay);
- /* Now read the actual register */
-
- ret = i2c_smbus_read_i2c_block_data(chip->client,
- chan->address >> 8, 3,
- &chip->data.d8[1]);
-
- if (ret < 0)
- goto out;
-
- /*
- * Either for Capacitance, Voltage or Temperature,
- * the 0x000000 code represents negative full scale,
- * the 0x800000 code represents zero scale, and
- * the 0xFFFFFF code represents positive full scale.
- */
-
- *val = (be32_to_cpu(chip->data.d32) & 0xFFFFFF) - 0x800000;
-
- switch (chan->type) {
- case IIO_TEMP:
- /*
- * temperature in milli degrees Celsius
- * T = ((*val / 2048) - 4096) * 1000
- */
- *val = (*val * 125) / 256;
- break;
- case IIO_VOLTAGE:
-
- /*
- * The voltage from the VDD pin is internally
- * attenuated by 6.
- */
-
- if (chan->channel == 1) /* supply_raw */
- *val = *val * 6;
- break;
- default:
- break;
- }
-
- ret = IIO_VAL_INT;
- break;
- case IIO_CHAN_INFO_CALIBSCALE:
- switch (chan->type) {
- case IIO_CAPACITANCE:
- reg = AD7746_REG_CAP_GAINH;
- break;
- case IIO_VOLTAGE:
- reg = AD7746_REG_VOLT_GAINH;
- break;
- default:
- ret = -EINVAL;
- goto out;
- }
-
- ret = i2c_smbus_read_word_swapped(chip->client, reg);
- if (ret < 0)
- goto out;
- /* 1 + gain_val / 2^16 */
- *val = 1;
- *val2 = (15625 * ret) / 1024;
-
- ret = IIO_VAL_INT_PLUS_MICRO;
- break;
- case IIO_CHAN_INFO_CALIBBIAS:
- ret = i2c_smbus_read_word_swapped(chip->client,
- AD7746_REG_CAP_OFFH);
- if (ret < 0)
- goto out;
- *val = ret;
-
- ret = IIO_VAL_INT;
- break;
- case IIO_CHAN_INFO_OFFSET:
-
- /*
- * CAPDAC Scale = 21pF_typ / 127
- * CIN Scale = 8.192pF / 2^24
- * Offset Scale = CAPDAC Scale / CIN Scale = 338646
- */
-
- *val = AD7746_CAPDAC_DACP(chip->capdac[chan->channel]
- [chan->differential]) * 338646;
-
- ret = IIO_VAL_INT;
- break;
- case IIO_CHAN_INFO_SCALE:
- switch (chan->type) {
- case IIO_CAPACITANCE:
- /* CIN Scale: 8.192pf / 2^24 */
- *val = 0;
- *val2 = 488;
- ret = IIO_VAL_INT_PLUS_NANO;
- break;
- case IIO_VOLTAGE:
- /* VIN Scale: 1170mV / 2^23 */
- *val = 1170;
- *val2 = 23;
- ret = IIO_VAL_FRACTIONAL_LOG2;
- break;
- default:
- ret = -EINVAL;
- break;
- }
-
- break;
- case IIO_CHAN_INFO_SAMP_FREQ:
- switch (chan->type) {
- case IIO_CAPACITANCE:
- idx = (chip->config & AD7746_CONF_CAPFS_MASK) >>
- AD7746_CONF_CAPFS_SHIFT;
- *val = ad7746_cap_filter_rate_table[idx][0];
- ret = IIO_VAL_INT;
- break;
- case IIO_VOLTAGE:
- idx = (chip->config & AD7746_CONF_VTFS_MASK) >>
- AD7746_CONF_VTFS_SHIFT;
- *val = ad7746_vt_filter_rate_table[idx][0];
- ret = IIO_VAL_INT;
- break;
- default:
- ret = -EINVAL;
- }
- break;
- default:
- ret = -EINVAL;
- }
-out:
- mutex_unlock(&chip->lock);
- return ret;
-}
-
-static const struct iio_info ad7746_info = {
- .attrs = &ad7746_attribute_group,
- .read_raw = ad7746_read_raw,
- .write_raw = ad7746_write_raw,
-};
-
-/*
- * device probe and remove
- */
-#ifdef CONFIG_OF
-static struct ad7746_platform_data *ad7746_parse_dt(struct device *dev)
-{
- struct device_node *np = dev->of_node;
- struct ad7746_platform_data *pdata;
- unsigned int tmp;
- int ret;
-
- /*
- * The default excitation outputs are not inverted, it should be stated
- * in the dt if needed.
- */
-
- pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata)
- return NULL;
-
- ret = of_property_read_u32(np, "adi,exclvl", &tmp);
- if (ret || tmp > 3) {
- dev_warn(dev, "Wrong exclvl value, using default\n");
- pdata->exclvl = 3;
- } else {
- pdata->exclvl = tmp;
- }
-
- pdata->exca_en = true;
- pdata->excb_en = true;
- pdata->exca_inv_en = of_property_read_bool(np, "adi,nexca_en");
- pdata->excb_inv_en = of_property_read_bool(np, "adi,nexcb_en");
-
- return pdata;
-}
-#else
-static struct ad7746_platform_data *ad7746_parse_dt(struct device *dev)
-{
- return NULL;
-}
-#endif
-
-static int ad7746_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct ad7746_platform_data *pdata = client->dev.platform_data;
- struct ad7746_chip_info *chip;
- struct iio_dev *indio_dev;
- unsigned char regval = 0;
- int ret = 0;
-
- if (client->dev.of_node)
- pdata = ad7746_parse_dt(&client->dev);
- else
- pdata = client->dev.platform_data;
-
- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
- if (!indio_dev)
- return -ENOMEM;
- chip = iio_priv(indio_dev);
- mutex_init(&chip->lock);
- /* this is only used for device removal purposes */
- i2c_set_clientdata(client, indio_dev);
-
- chip->client = client;
- chip->capdac_set = -1;
-
- /* Establish that the iio_dev is a child of the i2c device */
- indio_dev->name = id->name;
- indio_dev->dev.parent = &client->dev;
- indio_dev->info = &ad7746_info;
- indio_dev->channels = ad7746_channels;
- if (id->driver_data == 7746)
- indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);
- else
- indio_dev->num_channels = ARRAY_SIZE(ad7746_channels) - 2;
- indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);
- 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 (pdata->excb_en) {
- if (pdata->excb_inv_en)
- 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 = i2c_smbus_write_byte_data(chip->client,
- AD7746_REG_EXC_SETUP, regval);
- if (ret < 0)
- return ret;
-
- ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
- if (ret)
- return ret;
-
- return 0;
-}
-
-static int ad7746_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct ad7746_chip_info *chip = iio_priv(indio_dev);
- unsigned char regval;
- int ret;
-
- mutex_lock(&chip->lock);
-
- regval = chip->config | AD7746_CONF_MODE_PWRDN;
- ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval);
-
- mutex_unlock(&chip->lock);
-
- if (ret < 0) {
- dev_warn(&client->dev, "Could NOT Power Down!\n");
- goto out;
- }
-
- iio_device_unregister(indio_dev);
-
-out:
- return ret;
-}
-
-static const struct i2c_device_id ad7746_id[] = {
- { "ad7745", 7745 },
- { "ad7746", 7746 },
- { "ad7747", 7747 },
- {}
-};
-MODULE_DEVICE_TABLE(i2c, ad7746_id);
-
-#ifdef CONFIG_OF
-static const struct of_device_id ad7746_of_match[] = {
- { .compatible = "adi,ad7745" },
- { .compatible = "adi,ad7746" },
- { .compatible = "adi,ad7747" },
- { }
-};
-MODULE_DEVICE_TABLE(of, ad7746_of_match);
-#endif
-
-static struct i2c_driver ad7746_driver = {
- .driver = {
- .name = KBUILD_MODNAME,
- .of_match_table = of_match_ptr(ad7746_of_match),
- },
- .probe = ad7746_probe,
- .remove = ad7746_remove,
- .id_table = ad7746_id,
-};
-module_i2c_driver(ad7746_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@xxxxxxxxxxxxxxxxxxxx>");
-MODULE_DESCRIPTION("Analog Devices AD7746/5/7 capacitive sensor driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/cdc/ad7746.h b/drivers/staging/iio/cdc/ad7746.h
deleted file mode 100644
index 2fbcee8..0000000
--- a/drivers/staging/iio/cdc/ad7746.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * AD7746 capacitive sensor driver supporting AD7745, AD7746 and AD7747
- *
- * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
- */
-
-#ifndef IIO_CDC_AD7746_H_
-#define IIO_CDC_AD7746_H_
-
-/*
- * TODO: struct ad7746_platform_data needs to go into include/linux/iio
- */
-
-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_ */
--
2.7.4