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iio: imu: st_lsm6dsx: export max num of slave devices in st_lsm6dsx_shub_settings

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Export max number of slave devices supported by the i2c master
controller in st_lsm6dsx_shub_settings data structure.
This is a preliminary patch to support i2c master controller
on lsm6dsm sensors

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lorenzo Bianconi 2019-12-14 17:52:54 +01:00 committed by Jonathan Cameron
parent 4dae3d6147
commit ee978bb86d
3 changed files with 5 additions and 2 deletions
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2
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
View File

@ -176,6 +176,7 @@ struct st_lsm6dsx_hw_ts_settings {
* @pullup_en: i2c controller pull-up register info (addr + mask).
* @aux_sens: aux sensor register info (addr + mask).
* @wr_once: write_once register info (addr + mask).
* @num_ext_dev: max number of slave devices.
* @shub_out: sensor hub first output register info.
* @slv0_addr: slave0 address in secondary page.
* @dw_slv0_addr: slave0 write register address in secondary page.
@ -187,6 +188,7 @@ struct st_lsm6dsx_shub_settings {
struct st_lsm6dsx_reg pullup_en;
struct st_lsm6dsx_reg aux_sens;
struct st_lsm6dsx_reg wr_once;
u8 num_ext_dev;
u8 shub_out;
u8 slv0_addr;
u8 dw_slv0_addr;

2
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
View File

@ -883,6 +883,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.addr = 0x14,
.mask = BIT(6),
},
.num_ext_dev = 3,
.shub_out = 0x02,
.slv0_addr = 0x15,
.dw_slv0_addr = 0x21,
@ -1257,6 +1258,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
.addr = 0x14,
.mask = BIT(6),
},
.num_ext_dev = 3,
.shub_out = 0x02,
.slv0_addr = 0x15,
.dw_slv0_addr = 0x21,

3
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_shub.c
View File

@ -30,7 +30,6 @@
#include "st_lsm6dsx.h"
#define ST_LSM6DSX_MAX_SLV_NUM 3
#define ST_LSM6DSX_SLV_ADDR(n, base) ((base) + (n) * 3)
#define ST_LSM6DSX_SLV_SUB_ADDR(n, base) ((base) + 1 + (n) * 3)
#define ST_LSM6DSX_SLV_CONFIG(n, base) ((base) + 2 + (n) * 3)
@ -770,7 +769,7 @@ int st_lsm6dsx_shub_probe(struct st_lsm6dsx_hw *hw, const char *name)
if (err < 0)
return err;
if (++num_ext_dev >= ST_LSM6DSX_MAX_SLV_NUM)
if (++num_ext_dev >= hw->settings->shub_settings.num_ext_dev)
break;
id++;
}