From: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
Burst write with SPI is not working for all icm42600 chips. It was
only used for setting user offsets with regmap_bulk_write.
Add specific SPI regmap config for using only single write with SPI.
Fixes: 9f9ff91b775b ("iio: imu: inv_icm42600: add SPI driver for inv_icm42600 driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
Link: https://patch.msgid.link/20241112-inv-icm42600-fix-spi-burst-write-not-supported-v2-1-97690dc03607@xxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
(cherry picked from commit c0f866de4ce447bca3191b9cefac60c4b36a7922)
---
drivers/iio/imu/inv_icm42600/inv_icm42600.h | 1 +
drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 11 +++++++++++
drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c | 3 ++-
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
index 3d91469beccb..20fb1c33b90a 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
@@ -360,6 +360,7 @@ struct inv_icm42600_state {
typedef int (*inv_icm42600_bus_setup)(struct inv_icm42600_state *);
extern const struct regmap_config inv_icm42600_regmap_config;
+extern const struct regmap_config inv_icm42600_spi_regmap_config;
extern const struct dev_pm_ops inv_icm42600_pm_ops;
const struct iio_mount_matrix *
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
index ca85fccc9839..f4f0dc213769 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
@@ -43,6 +43,17 @@ const struct regmap_config inv_icm42600_regmap_config = {
};
EXPORT_SYMBOL_GPL(inv_icm42600_regmap_config);
+/* define specific regmap for SPI not supporting burst write */
+const struct regmap_config inv_icm42600_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x4FFF,
+ .ranges = inv_icm42600_regmap_ranges,
+ .num_ranges = ARRAY_SIZE(inv_icm42600_regmap_ranges),
+ .use_single_write = true,
+};
+EXPORT_SYMBOL_GPL(inv_icm42600_spi_regmap_config);
+
struct inv_icm42600_hw {
uint8_t whoami;
const char *name;
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
index e6305e5fa975..4441c3bb9601 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_spi.c
@@ -59,7 +59,8 @@ static int inv_icm42600_probe(struct spi_device *spi)
return -EINVAL;
chip = (uintptr_t)match;
- regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config);
+ /* use SPI specific regmap */
+ regmap = devm_regmap_init_spi(spi, &inv_icm42600_spi_regmap_config);
if (IS_ERR(regmap))
return PTR_ERR(regmap);
--
2.25.1
