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iio: magnetometer: yas530: Add IIO scaling to "chip_info" 

Add IIO scaling to the "chip_info" structure to ease the handling to
different YAS variants.

Signed-off-by: Jakob Hauser <jahau@rocketmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/a12f892633bbee13a8856c231dc793ebbc5d3a03.1660337264.git.jahau@rocketmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jakob Hauser 2022-08-13 00:05:00 +02:00 committed by Jonathan Cameron
parent dd9bd44f87
commit 913fd40966
1 changed files with 7 additions and 21 deletions
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28
drivers/iio/magnetometer/yamaha-yas530.c
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@ -130,6 +130,7 @@ struct yas5xx;
* @version_names: version letters or namings
* @volatile_reg: device-specific volatile registers
* @volatile_reg_qty: quantity of device-specific volatile registers
* @scaling_val2: scaling value for IIO_CHAN_INFO_SCALE
*/
struct yas5xx_chip_info {
unsigned int devid;
@ -137,6 +138,7 @@ struct yas5xx_chip_info {
char *version_names[2];
const int *volatile_reg;
int volatile_reg_qty;
u32 scaling_val2;
};
/**
@ -504,27 +506,8 @@ static int yas5xx_read_raw(struct iio_dev *indio_dev,
}
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
switch (ci->devid) {
case YAS530_DEVICE_ID:
/*
* Raw values of YAS530 are in picotesla. Divide by
* 100000000 (10^8) to get Gauss.
*/
*val = 1;
*val2 = 100000000;
break;
case YAS532_DEVICE_ID:
/*
* Raw values of YAS532 are in nanotesla. Divide by
* 100000 (10^5) to get Gauss.
*/
*val = 1;
*val2 = 100000;
break;
default:
dev_err(yas5xx->dev, "unknown device type\n");
return -EINVAL;
}
*val = 1;
*val2 = ci->scaling_val2;
return IIO_VAL_FRACTIONAL;
default:
/* Unknown request */
@ -951,6 +934,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
.version_names = { "A", "B" },
.volatile_reg = yas530_volatile_reg,
.volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
.scaling_val2 = 100000000, /* picotesla to Gauss */
},
[yas532] = {
.devid = YAS532_DEVICE_ID,
@ -958,6 +942,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
.version_names = { "AB", "AC" },
.volatile_reg = yas530_volatile_reg,
.volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
.scaling_val2 = 100000, /* nanotesla to Gauss */
},
[yas533] = {
.devid = YAS532_DEVICE_ID,
@ -965,6 +950,7 @@ static const struct yas5xx_chip_info yas5xx_chip_info_tbl[] = {
.version_names = { "AB", "AC" },
.volatile_reg = yas530_volatile_reg,
.volatile_reg_qty = ARRAY_SIZE(yas530_volatile_reg),
.scaling_val2 = 100000, /* nanotesla to Gauss */
},
};