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Subject[PATCH v5 1/4] iio: imu: st_lsm6dsx: introduce update_fifo function pointer
Date
From: Lorenzo Bianconi <lorenzo@kernel.org>

Introduce update_fifo routine pointer in st_lsm6dsx_fifo_ops data
structure since we will need a different update FIFO configuration
callback adding support for lsm6ds0/lsm9ds1 imu device

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Tested-by: Martin Kepplinger <martin.kepplinger@puri.sm>
---
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h | 4 ++++
.../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 19 +++++++++++++++----
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 6 ++++++
3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
index 4e8e67ae1632..055e52dec36a 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h
@@ -75,6 +75,7 @@ struct st_lsm6dsx_reg {
u8 mask;
};

+struct st_lsm6dsx_sensor;
struct st_lsm6dsx_hw;

struct st_lsm6dsx_odr {
@@ -101,12 +102,14 @@ struct st_lsm6dsx_fs_table_entry {

/**
* struct st_lsm6dsx_fifo_ops - ST IMU FIFO settings
+ * @update_fifo: Update FIFO configuration callback.
* @read_fifo: Read FIFO callback.
* @fifo_th: FIFO threshold register info (addr + mask).
* @fifo_diff: FIFO diff status register info (addr + mask).
* @th_wl: FIFO threshold word length.
*/
struct st_lsm6dsx_fifo_ops {
+ int (*update_fifo)(struct st_lsm6dsx_sensor *sensor, bool enable);
int (*read_fifo)(struct st_lsm6dsx_hw *hw);
struct {
u8 addr;
@@ -327,6 +330,7 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw);
int st_lsm6dsx_set_watermark(struct iio_dev *iio_dev, unsigned int val);
int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor,
u16 watermark);
+int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable);
int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw);
int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw,
enum st_lsm6dsx_fifo_mode fifo_mode);
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index 2c03a5b80f80..b0f3da1976e4 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -602,9 +602,8 @@ int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw)
return err;
}

-static int st_lsm6dsx_update_fifo(struct iio_dev *iio_dev, bool enable)
+int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable)
{
- struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
struct st_lsm6dsx_hw *hw = sensor->hw;
int err;

@@ -676,12 +675,24 @@ static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)

static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev)
{
- return st_lsm6dsx_update_fifo(iio_dev, true);
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (!hw->settings->fifo_ops.update_fifo)
+ return -ENOTSUPP;
+
+ return hw->settings->fifo_ops.update_fifo(sensor, true);
}

static int st_lsm6dsx_buffer_postdisable(struct iio_dev *iio_dev)
{
- return st_lsm6dsx_update_fifo(iio_dev, false);
+ struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
+ struct st_lsm6dsx_hw *hw = sensor->hw;
+
+ if (!hw->settings->fifo_ops.update_fifo)
+ return -ENOTSUPP;
+
+ return hw->settings->fifo_ops.update_fifo(sensor, false);
}

static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index 85824d6739ee..0aa93b45d772 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -154,6 +154,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_fifo,
.fifo_th = {
.addr = 0x06,
@@ -262,6 +263,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_fifo,
.fifo_th = {
.addr = 0x06,
@@ -379,6 +381,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_fifo,
.fifo_th = {
.addr = 0x06,
@@ -490,6 +493,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_tagged_fifo,
.fifo_th = {
.addr = 0x07,
@@ -616,6 +620,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_tagged_fifo,
.fifo_th = {
.addr = 0x07,
@@ -719,6 +724,7 @@ static const struct st_lsm6dsx_settings st_lsm6dsx_sensor_settings[] = {
},
},
.fifo_ops = {
+ .update_fifo = st_lsm6dsx_update_fifo,
.read_fifo = st_lsm6dsx_read_tagged_fifo,
.fifo_th = {
.addr = 0x07,
--
2.20.1
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