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authorBenjamin Gaignard <benjamin.gaignard@linaro.org>2017-04-04 09:47:52 +0200
committerJonathan Cameron <jic23@kernel.org>2017-04-14 15:09:04 +0100
commit2a830a45ffb05d1aa8d7866235501f635678bec6 (patch)
treea5a48abbea064c60f455ffb9dd249543f7fcf27d /drivers/iio/trigger
parent4adec7da0536a345d901d7ba55b6c93a14eeeaff (diff)
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iio: stm32 trigger: Add counter enable modes
Device counting could be controlled by the level or the edges of a trigger. in_count0_enable_mode attibute allow to set the control mode. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/trigger')
-rw-r--r--drivers/iio/trigger/stm32-timer-trigger.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c
index 7db904cae926..0f1a2cf334bf 100644
--- a/drivers/iio/trigger/stm32-timer-trigger.c
+++ b/drivers/iio/trigger/stm32-timer-trigger.c
@@ -353,6 +353,74 @@ static const struct iio_info stm32_trigger_info = {
.write_raw = stm32_counter_write_raw
};
+static const char *const stm32_enable_modes[] = {
+ "always",
+ "gated",
+ "triggered",
+};
+
+static int stm32_enable_mode2sms(int mode)
+{
+ switch (mode) {
+ case 0:
+ return 0;
+ case 1:
+ return 5;
+ case 2:
+ return 6;
+ }
+
+ return -EINVAL;
+}
+
+static int stm32_set_enable_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
+{
+ struct stm32_timer_trigger *priv = iio_priv(indio_dev);
+ int sms = stm32_enable_mode2sms(mode);
+
+ if (sms < 0)
+ return sms;
+
+ regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, sms);
+
+ return 0;
+}
+
+static int stm32_sms2enable_mode(int mode)
+{
+ switch (mode) {
+ case 0:
+ return 0;
+ case 5:
+ return 1;
+ case 6:
+ return 2;
+ }
+
+ return -EINVAL;
+}
+
+static int stm32_get_enable_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct stm32_timer_trigger *priv = iio_priv(indio_dev);
+ u32 smcr;
+
+ regmap_read(priv->regmap, TIM_SMCR, &smcr);
+ smcr &= TIM_SMCR_SMS;
+
+ return stm32_sms2enable_mode(smcr);
+}
+
+static const struct iio_enum stm32_enable_mode_enum = {
+ .items = stm32_enable_modes,
+ .num_items = ARRAY_SIZE(stm32_enable_modes),
+ .set = stm32_set_enable_mode,
+ .get = stm32_get_enable_mode
+};
+
static const char *const stm32_quadrature_modes[] = {
"channel_A",
"channel_B",
@@ -466,6 +534,8 @@ static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = {
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),
{}
};