[PATCH v7 7/7] iio: accel: Add support for Kionix/ROHM KX132-1211 accelerometer
From: Mehdi Djait
Date: Wed Aug 09 2023 - 15:12:25 EST
Kionix KX132-1211 is a tri-axis 16-bit accelerometer that can support
ranges from ±2G to ±16G, digital output through I²C/SPI.
Add support for basic accelerometer features such as reading acceleration
via IIO using raw reads, triggered buffer (data-ready), or the WMI IRQ.
Datasheet: https://kionixfs.azureedge.net/en/document/KX132-1211-Technical-Reference-Manual-Rev-5.0.pdf
Acked-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Mehdi Djait <mehdi.djait.k@xxxxxxxxx>
---
v7:
- added a min_t in kx132_get_fifo_bytes to ensure that we don't that the
fifo_bytes is never bigger than the
fifo_length * KX022A_FIFO_SAMPLES_SIZE_BYTES - no matter what we read from I2C
as suggested by Matti
v6:
- no changes
v5:
- moved the position of u16 buf_smp_lvl_mask as suggested by Andy
- introduced buf_smp_lvl_mask in Patch 7 as suggested by Jonathan
v4:
- added KX132_REG_CNTL5 to the volatile ranges
- added the kionix reserved regs to the read_only ranges
- removed KX132_REG_MAN_WAKEUP from the write_only ranges
v3:
- fixed the warning of the kernel test robot in kx132_get_fifo_bytes
(invalid assignment: &=, left side has type restricted __le16
right side has type unsigned short)
v2:
- mentioned the kx132-1211 in the Kconfig
- added a kx132-specific get_fifo_bytes function
- changed the device name from "kx132" to "kx132-1211
drivers/iio/accel/Kconfig | 8 +-
drivers/iio/accel/kionix-kx022a-i2c.c | 2 +
drivers/iio/accel/kionix-kx022a-spi.c | 2 +
drivers/iio/accel/kionix-kx022a.c | 164 ++++++++++++++++++++++++++
drivers/iio/accel/kionix-kx022a.h | 54 +++++++++
5 files changed, 226 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index b6b45d359f28..d8cc6e6f2bb9 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -418,8 +418,8 @@ config IIO_KX022A_SPI
select IIO_KX022A
select REGMAP_SPI
help
- Enable support for the Kionix KX022A digital tri-axis
- accelerometer connected to I2C interface.
+ Enable support for the Kionix KX022A, KX132-1211 digital tri-axis
+ accelerometers connected to SPI interface.
config IIO_KX022A_I2C
tristate "Kionix KX022A tri-axis digital accelerometer I2C interface"
@@ -427,8 +427,8 @@ config IIO_KX022A_I2C
select IIO_KX022A
select REGMAP_I2C
help
- Enable support for the Kionix KX022A digital tri-axis
- accelerometer connected to I2C interface.
+ Enable support for the Kionix KX022A, KX132-1211 digital tri-axis
+ accelerometers connected to I2C interface.
config KXSD9
tristate "Kionix KXSD9 Accelerometer Driver"
diff --git a/drivers/iio/accel/kionix-kx022a-i2c.c b/drivers/iio/accel/kionix-kx022a-i2c.c
index c59558fc6493..0f4729c55d29 100644
--- a/drivers/iio/accel/kionix-kx022a-i2c.c
+++ b/drivers/iio/accel/kionix-kx022a-i2c.c
@@ -41,12 +41,14 @@ static int kx022a_i2c_probe(struct i2c_client *i2c)
static const struct i2c_device_id kx022a_i2c_id[] = {
{ .name = "kx022a", .driver_data = (kernel_ulong_t)&kx022a_chip_info },
+ { .name = "kx132-1211", .driver_data = (kernel_ulong_t)&kx132_chip_info },
{ }
};
MODULE_DEVICE_TABLE(i2c, kx022a_i2c_id);
static const struct of_device_id kx022a_of_match[] = {
{ .compatible = "kionix,kx022a", .data = &kx022a_chip_info },
+ { .compatible = "kionix,kx132-1211", .data = &kx132_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, kx022a_of_match);
diff --git a/drivers/iio/accel/kionix-kx022a-spi.c b/drivers/iio/accel/kionix-kx022a-spi.c
index 896b57866fc9..c7766492bcd9 100644
--- a/drivers/iio/accel/kionix-kx022a-spi.c
+++ b/drivers/iio/accel/kionix-kx022a-spi.c
@@ -37,12 +37,14 @@ static int kx022a_spi_probe(struct spi_device *spi)
static const struct spi_device_id kx022a_id[] = {
{ .name = "kx022a", .driver_data = (kernel_ulong_t)&kx022a_chip_info },
+ { .name = "kx132-1211", .driver_data = (kernel_ulong_t)&kx132_chip_info },
{ }
};
MODULE_DEVICE_TABLE(spi, kx022a_id);
static const struct of_device_id kx022a_of_match[] = {
{ .compatible = "kionix,kx022a", .data = &kx022a_chip_info },
+ { .compatible = "kionix,kx132-1211", .data = &kx132_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, kx022a_of_match);
diff --git a/drivers/iio/accel/kionix-kx022a.c b/drivers/iio/accel/kionix-kx022a.c
index 0b0f14dca17f..6a9e6d850ec0 100644
--- a/drivers/iio/accel/kionix-kx022a.c
+++ b/drivers/iio/accel/kionix-kx022a.c
@@ -150,6 +150,117 @@ static const struct regmap_config kx022a_regmap_config = {
.cache_type = REGCACHE_RBTREE,
};
+/* Regmap configs kx132 */
+static const struct regmap_range kx132_volatile_ranges[] = {
+ {
+ .range_min = KX132_REG_XADP_L,
+ .range_max = KX132_REG_COTR,
+ }, {
+ .range_min = KX132_REG_TSCP,
+ .range_max = KX132_REG_INT_REL,
+ }, {
+ /* The reset bit will be cleared by sensor */
+ .range_min = KX132_REG_CNTL2,
+ .range_max = KX132_REG_CNTL2,
+ }, {
+ .range_min = KX132_REG_CNTL5,
+ .range_max = KX132_REG_CNTL5,
+ }, {
+ .range_min = KX132_REG_BUF_STATUS_1,
+ .range_max = KX132_REG_BUF_READ,
+ },
+};
+
+static const struct regmap_access_table kx132_volatile_regs = {
+ .yes_ranges = &kx132_volatile_ranges[0],
+ .n_yes_ranges = ARRAY_SIZE(kx132_volatile_ranges),
+};
+
+static const struct regmap_range kx132_precious_ranges[] = {
+ {
+ .range_min = KX132_REG_INT_REL,
+ .range_max = KX132_REG_INT_REL,
+ },
+};
+
+static const struct regmap_access_table kx132_precious_regs = {
+ .yes_ranges = &kx132_precious_ranges[0],
+ .n_yes_ranges = ARRAY_SIZE(kx132_precious_ranges),
+};
+
+static const struct regmap_range kx132_read_only_ranges[] = {
+ {
+ .range_min = KX132_REG_XADP_L,
+ .range_max = KX132_REG_INT_REL,
+ }, {
+ .range_min = KX132_REG_BUF_STATUS_1,
+ .range_max = KX132_REG_BUF_STATUS_2,
+ }, {
+ .range_min = KX132_REG_BUF_READ,
+ .range_max = KX132_REG_BUF_READ,
+ }, {
+ /* Kionix reserved registers: should not be written */
+ .range_min = 0x28,
+ .range_max = 0x28,
+ }, {
+ .range_min = 0x35,
+ .range_max = 0x36,
+ }, {
+ .range_min = 0x3c,
+ .range_max = 0x48,
+ }, {
+ .range_min = 0x4e,
+ .range_max = 0x5c,
+ }, {
+ .range_min = 0x77,
+ .range_max = 0x7f,
+ },
+};
+
+static const struct regmap_access_table kx132_ro_regs = {
+ .no_ranges = &kx132_read_only_ranges[0],
+ .n_no_ranges = ARRAY_SIZE(kx132_read_only_ranges),
+};
+
+static const struct regmap_range kx132_write_only_ranges[] = {
+ {
+ .range_min = KX132_REG_SELF_TEST,
+ .range_max = KX132_REG_SELF_TEST,
+ }, {
+ .range_min = KX132_REG_BUF_CLEAR,
+ .range_max = KX132_REG_BUF_CLEAR,
+ },
+};
+
+static const struct regmap_access_table kx132_wo_regs = {
+ .no_ranges = &kx132_write_only_ranges[0],
+ .n_no_ranges = ARRAY_SIZE(kx132_write_only_ranges),
+};
+
+static const struct regmap_range kx132_noinc_read_ranges[] = {
+ {
+ .range_min = KX132_REG_BUF_READ,
+ .range_max = KX132_REG_BUF_READ,
+ },
+};
+
+static const struct regmap_access_table kx132_nir_regs = {
+ .yes_ranges = &kx132_noinc_read_ranges[0],
+ .n_yes_ranges = ARRAY_SIZE(kx132_noinc_read_ranges),
+};
+
+static const struct regmap_config kx132_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_table = &kx132_volatile_regs,
+ .rd_table = &kx132_wo_regs,
+ .wr_table = &kx132_ro_regs,
+ .rd_noinc_table = &kx132_nir_regs,
+ .precious_table = &kx132_precious_regs,
+ .max_register = KX132_MAX_REGISTER,
+ .cache_type = REGCACHE_RBTREE,
+};
+
struct kx022a_data {
struct regmap *regmap;
const struct kx022a_chip_info *chip_info;
@@ -239,6 +350,13 @@ static const struct iio_chan_spec kx022a_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(3),
};
+static const struct iio_chan_spec kx132_channels[] = {
+ KX022A_ACCEL_CHAN(X, KX132_REG_XOUT_L, 0),
+ KX022A_ACCEL_CHAN(Y, KX132_REG_YOUT_L, 1),
+ KX022A_ACCEL_CHAN(Z, KX132_REG_ZOUT_L, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
/*
* The sensor HW can support ODR up to 1600 Hz, which is beyond what most of the
* Linux CPUs can handle without dropping samples. Also, the low power mode is
@@ -612,6 +730,26 @@ static int kx022a_get_fifo_bytes(struct kx022a_data *data)
return fifo_bytes;
}
+static int kx132_get_fifo_bytes(struct kx022a_data *data)
+{
+ __le16 buf_status;
+ int ret, fifo_bytes;
+
+ ret = regmap_bulk_read(data->regmap, data->chip_info->buf_status1,
+ &buf_status, sizeof(buf_status));
+ if (ret) {
+ dev_err(data->dev, "Error reading buffer status\n");
+ return ret;
+ }
+
+ fifo_bytes = le16_to_cpu(buf_status);
+ fifo_bytes &= data->chip_info->buf_smp_lvl_mask;
+ fifo_bytes = min_t(int, fifo_bytes, data->chip_info->fifo_length *
+ KX022A_FIFO_SAMPLES_SIZE_BYTES);
+
+ return fifo_bytes;
+}
+
static int __kx022a_fifo_flush(struct iio_dev *idev, unsigned int samples,
bool irq)
{
@@ -1034,6 +1172,32 @@ const struct kx022a_chip_info kx022a_chip_info = {
};
EXPORT_SYMBOL_NS_GPL(kx022a_chip_info, IIO_KX022A);
+const struct kx022a_chip_info kx132_chip_info = {
+ .name = "kx132-1211",
+ .regmap_config = &kx132_regmap_config,
+ .channels = kx132_channels,
+ .num_channels = ARRAY_SIZE(kx132_channels),
+ .fifo_length = KX132_FIFO_LENGTH,
+ .who = KX132_REG_WHO,
+ .id = KX132_ID,
+ .cntl = KX132_REG_CNTL,
+ .cntl2 = KX132_REG_CNTL2,
+ .odcntl = KX132_REG_ODCNTL,
+ .buf_cntl1 = KX132_REG_BUF_CNTL1,
+ .buf_cntl2 = KX132_REG_BUF_CNTL2,
+ .buf_clear = KX132_REG_BUF_CLEAR,
+ .buf_status1 = KX132_REG_BUF_STATUS_1,
+ .buf_smp_lvl_mask = KX132_MASK_BUF_SMP_LVL,
+ .buf_read = KX132_REG_BUF_READ,
+ .inc1 = KX132_REG_INC1,
+ .inc4 = KX132_REG_INC4,
+ .inc5 = KX132_REG_INC5,
+ .inc6 = KX132_REG_INC6,
+ .xout_l = KX132_REG_XOUT_L,
+ .get_fifo_bytes = kx132_get_fifo_bytes,
+};
+EXPORT_SYMBOL_NS_GPL(kx132_chip_info, IIO_KX022A);
+
int kx022a_probe_internal(struct device *dev, const struct kx022a_chip_info *chip_info)
{
static const char * const regulator_names[] = {"io-vdd", "vdd"};
diff --git a/drivers/iio/accel/kionix-kx022a.h b/drivers/iio/accel/kionix-kx022a.h
index c9f9aee7e597..ea6202d29303 100644
--- a/drivers/iio/accel/kionix-kx022a.h
+++ b/drivers/iio/accel/kionix-kx022a.h
@@ -74,6 +74,57 @@
#define KX022A_REG_SELF_TEST 0x60
#define KX022A_MAX_REGISTER 0x60
+#define KX132_REG_WHO 0x13
+#define KX132_ID 0x3d
+
+#define KX132_FIFO_LENGTH 86
+
+#define KX132_REG_CNTL 0x1b
+#define KX132_REG_CNTL2 0x1c
+#define KX132_REG_CNTL5 0x1f
+#define KX132_MASK_RES BIT(6)
+#define KX132_GSEL_2 0x0
+#define KX132_GSEL_4 BIT(3)
+#define KX132_GSEL_8 BIT(4)
+#define KX132_GSEL_16 GENMASK(4, 3)
+
+#define KX132_REG_INS2 0x17
+#define KX132_MASK_INS2_WMI BIT(5)
+
+#define KX132_REG_XADP_L 0x02
+#define KX132_REG_XOUT_L 0x08
+#define KX132_REG_YOUT_L 0x0a
+#define KX132_REG_ZOUT_L 0x0c
+#define KX132_REG_COTR 0x12
+#define KX132_REG_TSCP 0x14
+#define KX132_REG_INT_REL 0x1a
+
+#define KX132_REG_ODCNTL 0x21
+
+#define KX132_REG_BTS_WUF_TH 0x4a
+
+#define KX132_REG_BUF_CNTL1 0x5e
+#define KX132_REG_BUF_CNTL2 0x5f
+#define KX132_REG_BUF_STATUS_1 0x60
+#define KX132_REG_BUF_STATUS_2 0x61
+#define KX132_MASK_BUF_SMP_LVL GENMASK(9, 0)
+#define KX132_REG_BUF_CLEAR 0x62
+#define KX132_REG_BUF_READ 0x63
+#define KX132_ODR_SHIFT 3
+#define KX132_FIFO_MAX_WMI_TH 86
+
+#define KX132_REG_INC1 0x22
+#define KX132_REG_INC5 0x26
+#define KX132_REG_INC6 0x27
+#define KX132_IPOL_LOW 0
+#define KX132_IPOL_HIGH KX022A_MASK_IPOL
+#define KX132_ITYP_PULSE KX022A_MASK_ITYP
+
+#define KX132_REG_INC4 0x25
+
+#define KX132_REG_SELF_TEST 0x5d
+#define KX132_MAX_REGISTER 0x76
+
struct device;
struct kx022a_data;
@@ -86,6 +137,7 @@ struct kx022a_data;
* @channels: pointer to iio_chan_spec array
* @num_channels: number of iio_chan_spec channels
* @fifo_length: number of 16-bit samples in a full buffer
+ * @buf_smp_lvl_mask: buffer sample level mask
* @who: WHO_AM_I register
* @id: WHO_AM_I register value
* @cntl: control register 1
@@ -109,6 +161,7 @@ struct kx022a_chip_info {
const struct iio_chan_spec *channels;
unsigned int num_channels;
unsigned int fifo_length;
+ u16 buf_smp_lvl_mask;
u8 who;
u8 id;
u8 cntl;
@@ -130,5 +183,6 @@ struct kx022a_chip_info {
int kx022a_probe_internal(struct device *dev, const struct kx022a_chip_info *chip_info);
extern const struct kx022a_chip_info kx022a_chip_info;
+extern const struct kx022a_chip_info kx132_chip_info;
#endif
--
2.30.2