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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 2022-08-12 23:54:14 +02:00 committed by Jonathan Cameron
parent 92d9c05ca7
commit a70f60e5b6
1 changed files with 74 additions and 24 deletions
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98
drivers/iio/magnetometer/yamaha-yas530.c
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@ -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);