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IIO: stm32: Remove quadrature related functions from trigger driver

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Quadrature feature is now hosted on it own framework.
Remove quadrature related code from stm32-trigger driver to avoid
code duplication and simplify the ABI.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Benjamin Gaignard 2019-05-07 11:12:24 +02:00 committed by Jonathan Cameron
parent 0eec1f38c7
commit b299d00420
2 changed files with 0 additions and 107 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

23
Documentation/ABI/testing/sysfs-bus-iio-timer-stm32
View file

@ -91,29 +91,6 @@ Description:
When counting down the counter start from preset value
and fire event when reach 0.
What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
Description:
Reading returns the list possible quadrature modes.
What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com
Description:
Configure the device counter quadrature modes:
channel_A:
Encoder A input servers as the count input and B as
the UP/DOWN direction control input.
channel_B:
Encoder B input serves as the count input and A as
the UP/DOWN direction control input.
quadrature:
Encoder A and B inputs are mixed to get direction
and count with a scale of 0.25.
What: /sys/bus/iio/devices/iio:deviceX/in_count_enable_mode_available
KernelVersion: 4.12
Contact: benjamin.gaignard@st.com

84
drivers/iio/trigger/stm32-timer-trigger.c
View file

@ -608,86 +608,6 @@ static const struct iio_enum stm32_enable_mode_enum = {
.get = stm32_get_enable_mode
};
static const char *const stm32_quadrature_modes[] = {
"channel_A",
"channel_B",
"quadrature",
};
static int stm32_set_quadrature_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
unsigned int mode)
{
struct stm32_timer_trigger *priv = iio_priv(indio_dev);
regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, mode + 1);
return 0;
}
static int stm32_get_quadrature_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct stm32_timer_trigger *priv = iio_priv(indio_dev);
u32 smcr;
int mode;
regmap_read(priv->regmap, TIM_SMCR, &smcr);
mode = (smcr & TIM_SMCR_SMS) - 1;
if ((mode < 0) || (mode > ARRAY_SIZE(stm32_quadrature_modes)))
return -EINVAL;
return mode;
}
static const struct iio_enum stm32_quadrature_mode_enum = {
.items = stm32_quadrature_modes,
.num_items = ARRAY_SIZE(stm32_quadrature_modes),
.set = stm32_set_quadrature_mode,
.get = stm32_get_quadrature_mode
};
static const char *const stm32_count_direction_states[] = {
"up",
"down"
};
static int stm32_set_count_direction(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
unsigned int dir)
{
struct stm32_timer_trigger *priv = iio_priv(indio_dev);
u32 val;
int mode;
/* In encoder mode, direction is RO (given by TI1/TI2 signals) */
regmap_read(priv->regmap, TIM_SMCR, &val);
mode = (val & TIM_SMCR_SMS) - 1;
if ((mode >= 0) || (mode < ARRAY_SIZE(stm32_quadrature_modes)))
return -EBUSY;
return regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_DIR,
dir ? TIM_CR1_DIR : 0);
}
static int stm32_get_count_direction(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
struct stm32_timer_trigger *priv = iio_priv(indio_dev);
u32 cr1;
regmap_read(priv->regmap, TIM_CR1, &cr1);
return ((cr1 & TIM_CR1_DIR) ? 1 : 0);
}
static const struct iio_enum stm32_count_direction_enum = {
.items = stm32_count_direction_states,
.num_items = ARRAY_SIZE(stm32_count_direction_states),
.set = stm32_set_count_direction,
.get = stm32_get_count_direction
};
static ssize_t stm32_count_get_preset(struct iio_dev *indio_dev,
uintptr_t private,
const struct iio_chan_spec *chan,
@ -728,10 +648,6 @@ static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = {
.read = stm32_count_get_preset,
.write = stm32_count_set_preset
},
IIO_ENUM("count_direction", IIO_SEPARATE, &stm32_count_direction_enum),
IIO_ENUM_AVAILABLE("count_direction", &stm32_count_direction_enum),
IIO_ENUM("quadrature_mode", IIO_SEPARATE, &stm32_quadrature_mode_enum),
IIO_ENUM_AVAILABLE("quadrature_mode", &stm32_quadrature_mode_enum),
IIO_ENUM("enable_mode", IIO_SEPARATE, &stm32_enable_mode_enum),
IIO_ENUM_AVAILABLE("enable_mode", &stm32_enable_mode_enum),
IIO_ENUM("trigger_mode", IIO_SEPARATE, &stm32_trigger_mode_enum),