diff options
| author |   Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> | 2017-01-22 19:32:24 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2017-01-28 12:41:53 +0000 |
| commit | dba329048ee5ddad7c7b6891e32b007c0d955f68 (patch) | |
| tree | 580427a699ebcdd11e3ad2c17b144a78aa59fd40 /drivers/iio | |
| parent | iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCs (diff) | |
| download | linux-dev-dba329048ee5ddad7c7b6891e32b007c0d955f68.tar.xz linux-dev-dba329048ee5ddad7c7b6891e32b007c0d955f68.zip | |
iio: imu: st_lsm6dsx: add possibility to select drdy pin
Add capability to route data ready signal on pin 1 or pin 2 of the package
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 59 |
1 files changed, 53 insertions, 6 deletions
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index f869dfa214e6..c92ddcc190e2 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -37,11 +37,14 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/platform_data/st_sensors_pdata.h> + #include "st_lsm6dsx.h" #define ST_LSM6DSX_REG_ACC_DEC_MASK GENMASK(2, 0) #define ST_LSM6DSX_REG_GYRO_DEC_MASK GENMASK(5, 3) #define ST_LSM6DSX_REG_INT1_ADDR 0x0d +#define ST_LSM6DSX_REG_INT2_ADDR 0x0e #define ST_LSM6DSX_REG_FIFO_FTH_IRQ_MASK BIT(3) #define ST_LSM6DSX_REG_WHOAMI_ADDR 0x0f #define ST_LSM6DSX_REG_RESET_ADDR 0x12 @@ -532,10 +535,56 @@ static const struct iio_info st_lsm6dsx_gyro_info = { static const unsigned long st_lsm6dsx_available_scan_masks[] = {0x7, 0x0}; +static int st_lsm6dsx_of_get_drdy_pin(struct st_lsm6dsx_hw *hw, int *drdy_pin) +{ + struct device_node *np = hw->dev->of_node; + int err; + + if (!np) + return -EINVAL; + + err = of_property_read_u32(np, "st,drdy-int-pin", drdy_pin); + if (err == -ENODATA) { + /* if the property has not been specified use default value */ + *drdy_pin = 1; + err = 0; + } + + return err; +} + +static int st_lsm6dsx_get_drdy_reg(struct st_lsm6dsx_hw *hw, u8 *drdy_reg) +{ + int err = 0, drdy_pin; + + if (st_lsm6dsx_of_get_drdy_pin(hw, &drdy_pin) < 0) { + struct st_sensors_platform_data *pdata; + struct device *dev = hw->dev; + + pdata = (struct st_sensors_platform_data *)dev->platform_data; + drdy_pin = pdata ? pdata->drdy_int_pin : 1; + } + + switch (drdy_pin) { + case 1: + *drdy_reg = ST_LSM6DSX_REG_INT1_ADDR; + break; + case 2: + *drdy_reg = ST_LSM6DSX_REG_INT2_ADDR; + break; + default: + dev_err(hw->dev, "unsupported data ready pin\n"); + err = -EINVAL; + break; + } + + return err; +} + static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw) { + u8 data, drdy_int_reg; int err; - u8 data; data = ST_LSM6DSX_REG_RESET_MASK; err = hw->tf->write(hw->dev, ST_LSM6DSX_REG_RESET_ADDR, sizeof(data), @@ -563,14 +612,12 @@ static int st_lsm6dsx_init_device(struct st_lsm6dsx_hw *hw) return err; /* enable FIFO watermak interrupt */ - err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_INT1_ADDR, - ST_LSM6DSX_REG_FIFO_FTH_IRQ_MASK, 1); + err = st_lsm6dsx_get_drdy_reg(hw, &drdy_int_reg); if (err < 0) return err; - /* redirect INT2 on INT1 */ - return st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_INT2_ON_INT1_ADDR, - ST_LSM6DSX_REG_INT2_ON_INT1_MASK, 1); + return st_lsm6dsx_write_with_mask(hw, drdy_int_reg, + ST_LSM6DSX_REG_FIFO_FTH_IRQ_MASK, 1); } static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw, |