mirror of
https://github.com/torvalds/linux.git
synced 2024-11-04 11:04:38 +00:00
iio: ak8975: add ak09911 and ak09912 support
Add 2 new definition entries to support ak0991x compass. Add a more advanced function to check we are dealing with the expected device. Remove standalone driver for ak09911. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
parent
286f74c253
commit
57e73a423b
@ -6,26 +6,21 @@
|
||||
menu "Magnetometer sensors"
|
||||
|
||||
config AK8975
|
||||
tristate "Asahi Kasei AK8975 3-Axis Magnetometer"
|
||||
tristate "Asahi Kasei AK 3-Axis Magnetometer"
|
||||
depends on I2C
|
||||
depends on GPIOLIB
|
||||
help
|
||||
Say yes here to build support for Asahi Kasei AK8975 3-Axis
|
||||
Magnetometer. This driver can also support AK8963, if i2c
|
||||
device name is identified as ak8963.
|
||||
Say yes here to build support for Asahi Kasei AK8975, AK8963,
|
||||
AK09911 or AK09912 3-Axis Magnetometer.
|
||||
|
||||
To compile this driver as a module, choose M here: the module
|
||||
will be called ak8975.
|
||||
|
||||
config AK09911
|
||||
tristate "Asahi Kasei AK09911 3-axis Compass"
|
||||
depends on I2C
|
||||
select AK8975
|
||||
help
|
||||
Say yes here to build support for Asahi Kasei AK09911 3-Axis
|
||||
Magnetometer.
|
||||
|
||||
To compile this driver as a module, choose M here: the module
|
||||
will be called ak09911.
|
||||
Deprecated: AK09911 is now supported by AK8975 driver.
|
||||
|
||||
config MAG3110
|
||||
tristate "Freescale MAG3110 3-Axis Magnetometer"
|
||||
|
@ -3,7 +3,6 @@
|
||||
#
|
||||
|
||||
# When adding new entries keep the list in alphabetical order
|
||||
obj-$(CONFIG_AK09911) += ak09911.o
|
||||
obj-$(CONFIG_AK8975) += ak8975.o
|
||||
obj-$(CONFIG_MAG3110) += mag3110.o
|
||||
obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o
|
||||
|
@ -1,326 +0,0 @@
|
||||
/*
|
||||
* AK09911 3-axis compass driver
|
||||
* Copyright (c) 2014, Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
* more details.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/acpi.h>
|
||||
#include <linux/iio/iio.h>
|
||||
|
||||
#define AK09911_REG_WIA1 0x00
|
||||
#define AK09911_REG_WIA2 0x01
|
||||
#define AK09911_WIA1_VALUE 0x48
|
||||
#define AK09911_WIA2_VALUE 0x05
|
||||
|
||||
#define AK09911_REG_ST1 0x10
|
||||
#define AK09911_REG_HXL 0x11
|
||||
#define AK09911_REG_HXH 0x12
|
||||
#define AK09911_REG_HYL 0x13
|
||||
#define AK09911_REG_HYH 0x14
|
||||
#define AK09911_REG_HZL 0x15
|
||||
#define AK09911_REG_HZH 0x16
|
||||
|
||||
#define AK09911_REG_ASAX 0x60
|
||||
#define AK09911_REG_ASAY 0x61
|
||||
#define AK09911_REG_ASAZ 0x62
|
||||
|
||||
#define AK09911_REG_CNTL1 0x30
|
||||
#define AK09911_REG_CNTL2 0x31
|
||||
#define AK09911_REG_CNTL3 0x32
|
||||
|
||||
#define AK09911_MODE_SNG_MEASURE 0x01
|
||||
#define AK09911_MODE_SELF_TEST 0x10
|
||||
#define AK09911_MODE_FUSE_ACCESS 0x1F
|
||||
#define AK09911_MODE_POWERDOWN 0x00
|
||||
#define AK09911_RESET_DATA 0x01
|
||||
|
||||
#define AK09911_REG_CNTL1 0x30
|
||||
#define AK09911_REG_CNTL2 0x31
|
||||
#define AK09911_REG_CNTL3 0x32
|
||||
|
||||
#define AK09911_RAW_TO_GAUSS(asa) ((((asa) + 128) * 6000) / 256)
|
||||
|
||||
#define AK09911_MAX_CONVERSION_TIMEOUT_MS 500
|
||||
#define AK09911_CONVERSION_DONE_POLL_TIME_MS 10
|
||||
|
||||
struct ak09911_data {
|
||||
struct i2c_client *client;
|
||||
struct mutex lock;
|
||||
u8 asa[3];
|
||||
long raw_to_gauss[3];
|
||||
};
|
||||
|
||||
static const int ak09911_index_to_reg[] = {
|
||||
AK09911_REG_HXL, AK09911_REG_HYL, AK09911_REG_HZL,
|
||||
};
|
||||
|
||||
static int ak09911_set_mode(struct i2c_client *client, u8 mode)
|
||||
{
|
||||
int ret;
|
||||
|
||||
switch (mode) {
|
||||
case AK09911_MODE_SNG_MEASURE:
|
||||
case AK09911_MODE_SELF_TEST:
|
||||
case AK09911_MODE_FUSE_ACCESS:
|
||||
case AK09911_MODE_POWERDOWN:
|
||||
ret = i2c_smbus_write_byte_data(client,
|
||||
AK09911_REG_CNTL2, mode);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "set_mode error\n");
|
||||
return ret;
|
||||
}
|
||||
/* After mode change wait atleast 100us */
|
||||
usleep_range(100, 500);
|
||||
break;
|
||||
default:
|
||||
dev_err(&client->dev,
|
||||
"%s: Unknown mode(%d).", __func__, mode);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Get Sensitivity Adjustment value */
|
||||
static int ak09911_get_asa(struct i2c_client *client)
|
||||
{
|
||||
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
||||
struct ak09911_data *data = iio_priv(indio_dev);
|
||||
int ret;
|
||||
|
||||
ret = ak09911_set_mode(client, AK09911_MODE_FUSE_ACCESS);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Get asa data and store in the device data. */
|
||||
ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_ASAX,
|
||||
3, data->asa);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Not able to read asa data\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = ak09911_set_mode(client, AK09911_MODE_POWERDOWN);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
data->raw_to_gauss[0] = AK09911_RAW_TO_GAUSS(data->asa[0]);
|
||||
data->raw_to_gauss[1] = AK09911_RAW_TO_GAUSS(data->asa[1]);
|
||||
data->raw_to_gauss[2] = AK09911_RAW_TO_GAUSS(data->asa[2]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ak09911_verify_chip_id(struct i2c_client *client)
|
||||
{
|
||||
u8 wia_val[2];
|
||||
int ret;
|
||||
|
||||
ret = i2c_smbus_read_i2c_block_data(client, AK09911_REG_WIA1,
|
||||
2, wia_val);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Error reading WIA\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
dev_dbg(&client->dev, "WIA %02x %02x\n", wia_val[0], wia_val[1]);
|
||||
|
||||
if (wia_val[0] != AK09911_WIA1_VALUE ||
|
||||
wia_val[1] != AK09911_WIA2_VALUE) {
|
||||
dev_err(&client->dev, "Device ak09911 not found\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int wait_conversion_complete_polled(struct ak09911_data *data)
|
||||
{
|
||||
struct i2c_client *client = data->client;
|
||||
u8 read_status;
|
||||
u32 timeout_ms = AK09911_MAX_CONVERSION_TIMEOUT_MS;
|
||||
int ret;
|
||||
|
||||
/* Wait for the conversion to complete. */
|
||||
while (timeout_ms) {
|
||||
msleep_interruptible(AK09911_CONVERSION_DONE_POLL_TIME_MS);
|
||||
ret = i2c_smbus_read_byte_data(client, AK09911_REG_ST1);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Error in reading ST1\n");
|
||||
return ret;
|
||||
}
|
||||
read_status = ret & 0x01;
|
||||
if (read_status)
|
||||
break;
|
||||
timeout_ms -= AK09911_CONVERSION_DONE_POLL_TIME_MS;
|
||||
}
|
||||
if (!timeout_ms) {
|
||||
dev_err(&client->dev, "Conversion timeout happened\n");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return read_status;
|
||||
}
|
||||
|
||||
static int ak09911_read_axis(struct iio_dev *indio_dev, int index, int *val)
|
||||
{
|
||||
struct ak09911_data *data = iio_priv(indio_dev);
|
||||
struct i2c_client *client = data->client;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&data->lock);
|
||||
|
||||
ret = ak09911_set_mode(client, AK09911_MODE_SNG_MEASURE);
|
||||
if (ret < 0)
|
||||
goto fn_exit;
|
||||
|
||||
ret = wait_conversion_complete_polled(data);
|
||||
if (ret < 0)
|
||||
goto fn_exit;
|
||||
|
||||
/* Read data */
|
||||
ret = i2c_smbus_read_word_data(client, ak09911_index_to_reg[index]);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Read axis data fails\n");
|
||||
goto fn_exit;
|
||||
}
|
||||
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
/* Clamp to valid range. */
|
||||
*val = sign_extend32(clamp_t(s16, ret, -8192, 8191), 13);
|
||||
|
||||
return IIO_VAL_INT;
|
||||
|
||||
fn_exit:
|
||||
mutex_unlock(&data->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ak09911_read_raw(struct iio_dev *indio_dev,
|
||||
struct iio_chan_spec const *chan,
|
||||
int *val, int *val2,
|
||||
long mask)
|
||||
{
|
||||
struct ak09911_data *data = iio_priv(indio_dev);
|
||||
|
||||
switch (mask) {
|
||||
case IIO_CHAN_INFO_RAW:
|
||||
return ak09911_read_axis(indio_dev, chan->address, val);
|
||||
case IIO_CHAN_INFO_SCALE:
|
||||
*val = 0;
|
||||
*val2 = data->raw_to_gauss[chan->address];
|
||||
return IIO_VAL_INT_PLUS_MICRO;
|
||||
}
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
#define AK09911_CHANNEL(axis, index) \
|
||||
{ \
|
||||
.type = IIO_MAGN, \
|
||||
.modified = 1, \
|
||||
.channel2 = IIO_MOD_##axis, \
|
||||
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
||||
BIT(IIO_CHAN_INFO_SCALE), \
|
||||
.address = index, \
|
||||
}
|
||||
|
||||
static const struct iio_chan_spec ak09911_channels[] = {
|
||||
AK09911_CHANNEL(X, 0), AK09911_CHANNEL(Y, 1), AK09911_CHANNEL(Z, 2),
|
||||
};
|
||||
|
||||
static const struct iio_info ak09911_info = {
|
||||
.read_raw = &ak09911_read_raw,
|
||||
.driver_module = THIS_MODULE,
|
||||
};
|
||||
|
||||
static const struct acpi_device_id ak_acpi_match[] = {
|
||||
{"AK009911", 0},
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
|
||||
|
||||
static int ak09911_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct iio_dev *indio_dev;
|
||||
struct ak09911_data *data;
|
||||
const char *name;
|
||||
int ret;
|
||||
|
||||
ret = ak09911_verify_chip_id(client);
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "AK00911 not detected\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
||||
if (indio_dev == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
data = iio_priv(indio_dev);
|
||||
i2c_set_clientdata(client, indio_dev);
|
||||
|
||||
data->client = client;
|
||||
mutex_init(&data->lock);
|
||||
|
||||
ret = ak09911_get_asa(client);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (id)
|
||||
name = id->name;
|
||||
else if (ACPI_HANDLE(&client->dev))
|
||||
name = dev_name(&client->dev);
|
||||
else
|
||||
return -ENODEV;
|
||||
|
||||
dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
|
||||
|
||||
indio_dev->dev.parent = &client->dev;
|
||||
indio_dev->channels = ak09911_channels;
|
||||
indio_dev->num_channels = ARRAY_SIZE(ak09911_channels);
|
||||
indio_dev->info = &ak09911_info;
|
||||
indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
indio_dev->name = name;
|
||||
|
||||
return devm_iio_device_register(&client->dev, indio_dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id ak09911_id[] = {
|
||||
{"ak09911", 0},
|
||||
{}
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(i2c, ak09911_id);
|
||||
|
||||
static struct i2c_driver ak09911_driver = {
|
||||
.driver = {
|
||||
.name = "ak09911",
|
||||
.acpi_match_table = ACPI_PTR(ak_acpi_match),
|
||||
},
|
||||
.probe = ak09911_probe,
|
||||
.id_table = ak09911_id,
|
||||
};
|
||||
module_i2c_driver(ak09911_driver);
|
||||
|
||||
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_DESCRIPTION("AK09911 Compass driver");
|
@ -80,6 +80,58 @@
|
||||
|
||||
#define AK8975_MAX_REGS AK8975_REG_ASAZ
|
||||
|
||||
/*
|
||||
* AK09912 Register definitions
|
||||
*/
|
||||
#define AK09912_REG_WIA1 0x00
|
||||
#define AK09912_REG_WIA2 0x01
|
||||
#define AK09912_DEVICE_ID 0x04
|
||||
#define AK09911_DEVICE_ID 0x05
|
||||
|
||||
#define AK09911_REG_INFO1 0x02
|
||||
#define AK09911_REG_INFO2 0x03
|
||||
|
||||
#define AK09912_REG_ST1 0x10
|
||||
|
||||
#define AK09912_REG_ST1_DRDY_SHIFT 0
|
||||
#define AK09912_REG_ST1_DRDY_MASK (1 << AK09912_REG_ST1_DRDY_SHIFT)
|
||||
|
||||
#define AK09912_REG_HXL 0x11
|
||||
#define AK09912_REG_HXH 0x12
|
||||
#define AK09912_REG_HYL 0x13
|
||||
#define AK09912_REG_HYH 0x14
|
||||
#define AK09912_REG_HZL 0x15
|
||||
#define AK09912_REG_HZH 0x16
|
||||
#define AK09912_REG_TMPS 0x17
|
||||
|
||||
#define AK09912_REG_ST2 0x18
|
||||
#define AK09912_REG_ST2_HOFL_SHIFT 3
|
||||
#define AK09912_REG_ST2_HOFL_MASK (1 << AK09912_REG_ST2_HOFL_SHIFT)
|
||||
|
||||
#define AK09912_REG_CNTL1 0x30
|
||||
|
||||
#define AK09912_REG_CNTL2 0x31
|
||||
#define AK09912_REG_CNTL_MODE_POWER_DOWN 0x00
|
||||
#define AK09912_REG_CNTL_MODE_ONCE 0x01
|
||||
#define AK09912_REG_CNTL_MODE_SELF_TEST 0x10
|
||||
#define AK09912_REG_CNTL_MODE_FUSE_ROM 0x1F
|
||||
#define AK09912_REG_CNTL2_MODE_SHIFT 0
|
||||
#define AK09912_REG_CNTL2_MODE_MASK (0x1F << AK09912_REG_CNTL2_MODE_SHIFT)
|
||||
|
||||
#define AK09912_REG_CNTL3 0x32
|
||||
|
||||
#define AK09912_REG_TS1 0x33
|
||||
#define AK09912_REG_TS2 0x34
|
||||
#define AK09912_REG_TS3 0x35
|
||||
#define AK09912_REG_I2CDIS 0x36
|
||||
#define AK09912_REG_TS4 0x37
|
||||
|
||||
#define AK09912_REG_ASAX 0x60
|
||||
#define AK09912_REG_ASAY 0x61
|
||||
#define AK09912_REG_ASAZ 0x62
|
||||
|
||||
#define AK09912_MAX_REGS AK09912_REG_ASAZ
|
||||
|
||||
/*
|
||||
* Miscellaneous values.
|
||||
*/
|
||||
@ -130,22 +182,38 @@ static long ak8975_raw_to_gauss(u16 data)
|
||||
}
|
||||
|
||||
/*
|
||||
* For AK8963, same calculation, but the device is less sensitive:
|
||||
* For AK8963 and AK09911, same calculation, but the device is less sensitive:
|
||||
*
|
||||
* H is in the range of +-8190. The magnetometer has a range of
|
||||
* +-4912uT. To go from the raw value to uT is:
|
||||
*
|
||||
* HuT = H * 4912/8190, or roughly, 6/10, instead of 3/10.
|
||||
*/
|
||||
static long ak8963_raw_to_gauss(u16 data)
|
||||
|
||||
static long ak8963_09911_raw_to_gauss(u16 data)
|
||||
{
|
||||
return (((long)data + 128) * 6000) / 256;
|
||||
}
|
||||
|
||||
/*
|
||||
* For AK09912, same calculation, except the device is more sensitive:
|
||||
*
|
||||
* H is in the range of -32752 to 32752. The magnetometer has a range of
|
||||
* +-4912uT. To go from the raw value to uT is:
|
||||
*
|
||||
* HuT = H * 4912/32752, or roughly, 3/20, instead of 3/10.
|
||||
*/
|
||||
static long ak09912_raw_to_gauss(u16 data)
|
||||
{
|
||||
return (((long)data + 128) * 1500) / 256;
|
||||
}
|
||||
|
||||
/* Compatible Asahi Kasei Compass parts */
|
||||
enum asahi_compass_chipset {
|
||||
AK8975,
|
||||
AK8963,
|
||||
AK09911,
|
||||
AK09912,
|
||||
AK_MAX_TYPE
|
||||
};
|
||||
|
||||
@ -212,7 +280,7 @@ static struct ak_def ak_def_array[AK_MAX_TYPE] = {
|
||||
},
|
||||
{
|
||||
.type = AK8963,
|
||||
.raw_to_gauss = ak8963_raw_to_gauss,
|
||||
.raw_to_gauss = ak8963_09911_raw_to_gauss,
|
||||
.range = 8190,
|
||||
.ctrl_regs = {
|
||||
AK8975_REG_ST1,
|
||||
@ -235,6 +303,56 @@ static struct ak_def ak_def_array[AK_MAX_TYPE] = {
|
||||
AK8975_REG_HYL,
|
||||
AK8975_REG_HZL},
|
||||
},
|
||||
{
|
||||
.type = AK09911,
|
||||
.raw_to_gauss = ak8963_09911_raw_to_gauss,
|
||||
.range = 8192,
|
||||
.ctrl_regs = {
|
||||
AK09912_REG_ST1,
|
||||
AK09912_REG_ST2,
|
||||
AK09912_REG_CNTL2,
|
||||
AK09912_REG_ASAX,
|
||||
AK09912_MAX_REGS},
|
||||
.ctrl_masks = {
|
||||
AK09912_REG_ST1_DRDY_MASK,
|
||||
AK09912_REG_ST2_HOFL_MASK,
|
||||
0,
|
||||
AK09912_REG_CNTL2_MODE_MASK},
|
||||
.ctrl_modes = {
|
||||
AK09912_REG_CNTL_MODE_POWER_DOWN,
|
||||
AK09912_REG_CNTL_MODE_ONCE,
|
||||
AK09912_REG_CNTL_MODE_SELF_TEST,
|
||||
AK09912_REG_CNTL_MODE_FUSE_ROM},
|
||||
.data_regs = {
|
||||
AK09912_REG_HXL,
|
||||
AK09912_REG_HYL,
|
||||
AK09912_REG_HZL},
|
||||
},
|
||||
{
|
||||
.type = AK09912,
|
||||
.raw_to_gauss = ak09912_raw_to_gauss,
|
||||
.range = 32752,
|
||||
.ctrl_regs = {
|
||||
AK09912_REG_ST1,
|
||||
AK09912_REG_ST2,
|
||||
AK09912_REG_CNTL2,
|
||||
AK09912_REG_ASAX,
|
||||
AK09912_MAX_REGS},
|
||||
.ctrl_masks = {
|
||||
AK09912_REG_ST1_DRDY_MASK,
|
||||
AK09912_REG_ST2_HOFL_MASK,
|
||||
0,
|
||||
AK09912_REG_CNTL2_MODE_MASK},
|
||||
.ctrl_modes = {
|
||||
AK09912_REG_CNTL_MODE_POWER_DOWN,
|
||||
AK09912_REG_CNTL_MODE_ONCE,
|
||||
AK09912_REG_CNTL_MODE_SELF_TEST,
|
||||
AK09912_REG_CNTL_MODE_FUSE_ROM},
|
||||
.data_regs = {
|
||||
AK09912_REG_HXL,
|
||||
AK09912_REG_HYL,
|
||||
AK09912_REG_HZL},
|
||||
}
|
||||
};
|
||||
|
||||
/*
|
||||
@ -254,6 +372,52 @@ struct ak8975_data {
|
||||
u8 cntl_cache;
|
||||
};
|
||||
|
||||
/*
|
||||
* Return 0 if the i2c device is the one we expect.
|
||||
* return a negative error number otherwise
|
||||
*/
|
||||
static int ak8975_who_i_am(struct i2c_client *client,
|
||||
enum asahi_compass_chipset type)
|
||||
{
|
||||
u8 wia_val[2];
|
||||
int ret;
|
||||
|
||||
/*
|
||||
* Signature for each device:
|
||||
* Device | WIA1 | WIA2
|
||||
* AK09912 | DEVICE_ID | AK09912_DEVICE_ID
|
||||
* AK09911 | DEVICE_ID | AK09911_DEVICE_ID
|
||||
* AK8975 | DEVICE_ID | NA
|
||||
* AK8963 | DEVICE_ID | NA
|
||||
*/
|
||||
ret = i2c_smbus_read_i2c_block_data(client, AK09912_REG_WIA1,
|
||||
2, wia_val);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Error reading WIA\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (wia_val[0] != AK8975_DEVICE_ID)
|
||||
return -ENODEV;
|
||||
|
||||
switch (type) {
|
||||
case AK8975:
|
||||
case AK8963:
|
||||
return 0;
|
||||
case AK09911:
|
||||
if (wia_val[1] == AK09911_DEVICE_ID)
|
||||
return 0;
|
||||
break;
|
||||
case AK09912:
|
||||
if (wia_val[1] == AK09912_DEVICE_ID)
|
||||
return 0;
|
||||
break;
|
||||
default:
|
||||
dev_err(&client->dev, "Type %d unknown\n", type);
|
||||
}
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* Helper function to write to CNTL register.
|
||||
*/
|
||||
@ -329,21 +493,8 @@ static int ak8975_setup(struct i2c_client *client)
|
||||
{
|
||||
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
||||
struct ak8975_data *data = iio_priv(indio_dev);
|
||||
u8 device_id;
|
||||
int ret;
|
||||
|
||||
/* Confirm that the device we're talking to is really an AK8975. */
|
||||
ret = i2c_smbus_read_byte_data(client, AK8975_REG_WIA);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Error reading WIA\n");
|
||||
return ret;
|
||||
}
|
||||
device_id = ret;
|
||||
if (device_id != AK8975_DEVICE_ID) {
|
||||
dev_err(&client->dev, "Device ak8975 not found\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/* Write the fused rom access mode. */
|
||||
ret = ak8975_set_mode(data, FUSE_ROM);
|
||||
if (ret < 0) {
|
||||
@ -554,6 +705,8 @@ static const struct acpi_device_id ak_acpi_match[] = {
|
||||
{"AK8975", AK8975},
|
||||
{"AK8963", AK8963},
|
||||
{"INVN6500", AK8963},
|
||||
{"AK09911", AK09911},
|
||||
{"AK09912", AK09912},
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(acpi, ak_acpi_match);
|
||||
@ -633,6 +786,11 @@ static int ak8975_probe(struct i2c_client *client,
|
||||
}
|
||||
|
||||
data->def = &ak_def_array[chipset];
|
||||
err = ak8975_who_i_am(client, data->def->type);
|
||||
if (err < 0) {
|
||||
dev_err(&client->dev, "Unexpected device\n");
|
||||
return err;
|
||||
}
|
||||
dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
|
||||
|
||||
/* Perform some basic start-of-day setup of the device. */
|
||||
@ -655,6 +813,8 @@ static int ak8975_probe(struct i2c_client *client,
|
||||
static const struct i2c_device_id ak8975_id[] = {
|
||||
{"ak8975", AK8975},
|
||||
{"ak8963", AK8963},
|
||||
{"ak09911", AK09911},
|
||||
{"ak09912", AK09912},
|
||||
{}
|
||||
};
|
||||
|
||||
@ -665,6 +825,10 @@ static const struct of_device_id ak8975_of_match[] = {
|
||||
{ .compatible = "ak8975", },
|
||||
{ .compatible = "asahi-kasei,ak8963", },
|
||||
{ .compatible = "ak8963", },
|
||||
{ .compatible = "asahi-kasei,ak09911", },
|
||||
{ .compatible = "ak09911", },
|
||||
{ .compatible = "asahi-kasei,ak09912", },
|
||||
{ .compatible = "ak09912", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ak8975_of_match);
|
||||
|
Loading…
Reference in New Issue
Block a user