mirror of
https://github.com/torvalds/linux.git
synced 2024-11-26 14:12:06 +00:00
iio: magnetometer: yas530: Introduce "chip_info" structure
Introduce the "chip_info" structure approach for better variant handling. The variant to be used is now chosen by the Device Tree (enum "chip_ids"), not by the chip ID in the register. However, there is a check to make sure they match (using integer "id_check"). Signed-off-by: Jakob Hauser <jahau@rocketmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/57236545107286771d351b95091bf56815d3717d.1660337264.git.jahau@rocketmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jakob Hauser
Jonathan Cameron
parent
92d9c05ca7
commit
a70f60e5b6
@ -96,6 +96,12 @@
|
||||
/* Turn off device regulators etc after 5 seconds of inactivity */
|
||||
#define YAS5XX_AUTOSUSPEND_DELAY_MS 5000
|
||||
|
||||
enum chip_ids {
|
||||
yas530,
|
||||
yas532,
|
||||
yas533,
|
||||
};
|
||||
|
||||
struct yas5xx_calibration {
|
||||
/* Linearization calibration x, y1, y2 */
|
||||
s32 r[3];
|
||||
@ -110,12 +116,25 @@ struct yas5xx_calibration {
|
||||
u8 dck;
|
||||
};
|
||||
|
||||
struct yas5xx;
|
||||
|
||||
/**
|
||||
* struct yas5xx_chip_info - device-specific data and function pointers
|
||||
* @devid: device ID number
|
||||
* @product_name: product name of the YAS variant
|
||||
* @version_names: version letters or namings
|
||||
*/
|
||||
struct yas5xx_chip_info {
|
||||
unsigned int devid;
|
||||
char *product_name;
|
||||
char *version_names[2];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct yas5xx - state container for the YAS5xx driver
|
||||
* @dev: parent device pointer
|
||||
* @devid: device ID number
|
||||
* @chip_info: device-specific data
|
||||
* @version: device version
|
||||
* @name: device name
|
||||
* @calibration: calibration settings from the OTP storage
|
||||
* @hard_offsets: offsets for each axis measured with initcoil actuated
|
||||
* @orientation: mounting matrix, flipped axis etc
|
||||
@ -129,9 +148,8 @@ struct yas5xx_calibration {
|
||||
*/
|
||||
struct yas5xx {
|
||||
struct device *dev;
|
||||
unsigned int devid;
|
||||
const struct yas5xx_chip_info *chip_info;
|
||||
unsigned int version;
|
||||
char name[16];
|
||||
struct yas5xx_calibration calibration;
|
||||
s8 hard_offsets[3];
|
||||
struct iio_mount_matrix orientation;
|
||||
@ -192,6 +210,7 @@ static u16 yas532_extract_axis(u8 *data)
|
||||
*/
|
||||
static int yas530_measure(struct yas5xx *yas5xx, u16 *t, u16 *x, u16 *y1, u16 *y2)
|
||||
{
|
||||
const struct yas5xx_chip_info *ci = yas5xx->chip_info;
|
||||
unsigned int busy;
|
||||
u8 data[8];
|
||||
int ret;
|
||||
@ -222,7 +241,7 @@ static int yas530_measure(struct yas5xx *yas5xx, u16 *t, u16 *x, u16 *y1, u16 *y
|
||||
|
||||
mutex_unlock(&yas5xx->lock);
|
||||
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
/*
|
||||
* The t value is 9 bits in big endian format
|
||||
@ -267,6 +286,7 @@ out_unlock:
|
||||
/* Used by YAS530, YAS532 and YAS533 */
|
||||
static s32 yas530_linearize(struct yas5xx *yas5xx, u16 val, int axis)
|
||||
{
|
||||
const struct yas5xx_chip_info *ci = yas5xx->chip_info;
|
||||
struct yas5xx_calibration *c = &yas5xx->calibration;
|
||||
static const s32 yas532ac_coef[] = {
|
||||
YAS532_VERSION_AC_COEF_X,
|
||||
@ -276,7 +296,7 @@ static s32 yas530_linearize(struct yas5xx *yas5xx, u16 val, int axis)
|
||||
s32 coef;
|
||||
|
||||
/* Select coefficients */
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
if (yas5xx->version == YAS530_VERSION_A)
|
||||
coef = YAS530_VERSION_A_COEF;
|
||||
@ -319,6 +339,7 @@ static s32 yas530_linearize(struct yas5xx *yas5xx, u16 val, int axis)
|
||||
*/
|
||||
static int yas530_get_measure(struct yas5xx *yas5xx, s32 *to, s32 *xo, s32 *yo, s32 *zo)
|
||||
{
|
||||
const struct yas5xx_chip_info *ci = yas5xx->chip_info;
|
||||
struct yas5xx_calibration *c = &yas5xx->calibration;
|
||||
u16 t_ref, t, x, y1, y2;
|
||||
/* These are signed x, signed y1 etc */
|
||||
@ -336,7 +357,7 @@ static int yas530_get_measure(struct yas5xx *yas5xx, s32 *to, s32 *xo, s32 *yo,
|
||||
sy2 = yas530_linearize(yas5xx, y2, 2);
|
||||
|
||||
/* Set the temperature reference value (unit: counts) */
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
t_ref = YAS530_20DEGREES;
|
||||
break;
|
||||
@ -349,7 +370,7 @@ static int yas530_get_measure(struct yas5xx *yas5xx, s32 *to, s32 *xo, s32 *yo,
|
||||
}
|
||||
|
||||
/* Temperature compensation for x, y1, y2 respectively */
|
||||
if (yas5xx->devid == YAS532_DEVICE_ID &&
|
||||
if (ci->devid == YAS532_DEVICE_ID &&
|
||||
yas5xx->version == YAS532_VERSION_AC) {
|
||||
/*
|
||||
* YAS532 version AC uses the temperature deviation as a
|
||||
@ -384,7 +405,7 @@ static int yas530_get_measure(struct yas5xx *yas5xx, s32 *to, s32 *xo, s32 *yo,
|
||||
sz = -sy1 - sy2;
|
||||
|
||||
/* Process temperature readout */
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
/*
|
||||
* Raw temperature value t is the number of counts starting
|
||||
@ -442,6 +463,7 @@ static int yas5xx_read_raw(struct iio_dev *indio_dev,
|
||||
long mask)
|
||||
{
|
||||
struct yas5xx *yas5xx = iio_priv(indio_dev);
|
||||
const struct yas5xx_chip_info *ci = yas5xx->chip_info;
|
||||
s32 t, x, y, z;
|
||||
int ret;
|
||||
|
||||
@ -473,7 +495,7 @@ static int yas5xx_read_raw(struct iio_dev *indio_dev,
|
||||
}
|
||||
return IIO_VAL_INT;
|
||||
case IIO_CHAN_INFO_SCALE:
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
/*
|
||||
* Raw values of YAS530 are in picotesla. Divide by
|
||||
@ -802,6 +824,7 @@ static s8 yas530_adjust_offset(s8 old, int bit, u16 center, u16 measure)
|
||||
/* Used by YAS530, YAS532 and YAS533 */
|
||||
static int yas530_measure_offsets(struct yas5xx *yas5xx)
|
||||
{
|
||||
const struct yas5xx_chip_info *ci = yas5xx->chip_info;
|
||||
int ret;
|
||||
u16 center;
|
||||
u16 t, x, y1, y2;
|
||||
@ -814,7 +837,7 @@ static int yas530_measure_offsets(struct yas5xx *yas5xx)
|
||||
return ret;
|
||||
|
||||
/* When the initcoil is active this should be around the center */
|
||||
switch (yas5xx->devid) {
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
center = YAS530_DATA_CENTER;
|
||||
break;
|
||||
@ -895,12 +918,32 @@ static int yas530_power_on(struct yas5xx *yas5xx)
|
||||
return regmap_write(yas5xx->map, YAS530_MEASURE_INTERVAL, 0);
|
||||
}
|
||||
|
||||
static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
|
||||
[yas530] = {
|
||||
.devid = YAS530_DEVICE_ID,
|
||||
.product_name = "YAS530 MS-3E",
|
||||
.version_names = { "A", "B" },
|
||||
},
|
||||
[yas532] = {
|
||||
.devid = YAS532_DEVICE_ID,
|
||||
.product_name = "YAS532 MS-3R",
|
||||
.version_names = { "AB", "AC" },
|
||||
},
|
||||
[yas533] = {
|
||||
.devid = YAS532_DEVICE_ID,
|
||||
.product_name = "YAS533 MS-3F",
|
||||
.version_names = { "AB", "AC" },
|
||||
},
|
||||
};
|
||||
|
||||
static int yas5xx_probe(struct i2c_client *i2c,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct iio_dev *indio_dev;
|
||||
struct device *dev = &i2c->dev;
|
||||
struct yas5xx *yas5xx;
|
||||
const struct yas5xx_chip_info *ci;
|
||||
int id_check;
|
||||
int ret;
|
||||
|
||||
indio_dev = devm_iio_device_alloc(dev, sizeof(*yas5xx));
|
||||
@ -947,33 +990,40 @@ static int yas5xx_probe(struct i2c_client *i2c,
|
||||
goto assert_reset;
|
||||
}
|
||||
|
||||
ret = regmap_read(yas5xx->map, YAS5XX_DEVICE_ID, &yas5xx->devid);
|
||||
yas5xx->chip_info = &yas5xx_chip_info_tbl[id->driver_data];
|
||||
ci = yas5xx->chip_info;
|
||||
|
||||
ret = regmap_read(yas5xx->map, YAS5XX_DEVICE_ID, &id_check);
|
||||
if (ret)
|
||||
goto assert_reset;
|
||||
|
||||
switch (yas5xx->devid) {
|
||||
if (id_check != ci->devid) {
|
||||
ret = dev_err_probe(dev, -ENODEV,
|
||||
"device ID %02x doesn't match %s\n",
|
||||
id_check, id->name);
|
||||
goto assert_reset;
|
||||
}
|
||||
|
||||
switch (ci->devid) {
|
||||
case YAS530_DEVICE_ID:
|
||||
ret = yas530_get_calibration_data(yas5xx);
|
||||
if (ret)
|
||||
goto assert_reset;
|
||||
dev_info(dev, "detected YAS530 MS-3E %s",
|
||||
yas5xx->version ? "B" : "A");
|
||||
strncpy(yas5xx->name, "yas530", sizeof(yas5xx->name));
|
||||
break;
|
||||
case YAS532_DEVICE_ID:
|
||||
ret = yas532_get_calibration_data(yas5xx);
|
||||
if (ret)
|
||||
goto assert_reset;
|
||||
dev_info(dev, "detected YAS532/YAS533 MS-3R/F %s",
|
||||
yas5xx->version ? "AC" : "AB");
|
||||
strncpy(yas5xx->name, "yas532", sizeof(yas5xx->name));
|
||||
break;
|
||||
default:
|
||||
ret = -ENODEV;
|
||||
dev_err(dev, "unhandled device ID %02x\n", yas5xx->devid);
|
||||
dev_err(dev, "unhandled device ID %02x\n", ci->devid);
|
||||
goto assert_reset;
|
||||
}
|
||||
|
||||
dev_info(dev, "detected %s %s\n", ci->product_name,
|
||||
ci->version_names[yas5xx->version]);
|
||||
|
||||
yas530_dump_calibration(yas5xx);
|
||||
ret = yas530_power_on(yas5xx);
|
||||
if (ret)
|
||||
@ -985,7 +1035,7 @@ static int yas5xx_probe(struct i2c_client *i2c,
|
||||
indio_dev->info = &yas5xx_info;
|
||||
indio_dev->available_scan_masks = yas5xx_scan_masks;
|
||||
indio_dev->modes = INDIO_DIRECT_MODE;
|
||||
indio_dev->name = yas5xx->name;
|
||||
indio_dev->name = id->name;
|
||||
indio_dev->channels = yas5xx_channels;
|
||||
indio_dev->num_channels = ARRAY_SIZE(yas5xx_channels);
|
||||
|
||||
@ -1096,9 +1146,9 @@ static DEFINE_RUNTIME_DEV_PM_OPS(yas5xx_dev_pm_ops, yas5xx_runtime_suspend,
|
||||
yas5xx_runtime_resume, NULL);
|
||||
|
||||
static const struct i2c_device_id yas5xx_id[] = {
|
||||
{"yas530", },
|
||||
{"yas532", },
|
||||
{"yas533", },
|
||||
{"yas530", yas530 },
|
||||
{"yas532", yas532 },
|
||||
{"yas533", yas533 },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, yas5xx_id);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user