TCB hardware is capable of capturing the timer value to registers RA and
RB. On top, it is capable of triggering on compare against a third
register, RC. Add these registers as extensions.
Signed-off-by: Bence Csókás <csokas.bence@xxxxxxxxx>
---
drivers/counter/microchip-tcb-capture.c | 58 +++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c
index 2f096a5b973d..524b9edfaa5f 100644
--- a/drivers/counter/microchip-tcb-capture.c
+++ b/drivers/counter/microchip-tcb-capture.c
@@ -247,6 +247,62 @@ static int mchp_tc_count_read(struct counter_device *counter,
return 0;
}
+static int mchp_tc_count_cap_read(struct counter_device *counter,
+ struct counter_count *count, size_t idx, u64 *val)
+{
+ struct mchp_tc_data *const priv = counter_priv(counter);
+ u32 cnt;
+
+ switch (idx) {
+ case 0:
+ regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), &cnt);
+ break;
+ case 1:
+ regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), &cnt);
+ break;
+ case 2:
+ regmap_read(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), &cnt);
+ break;
+ default:
+ return -EINVAL;
+ }
+ *val = cnt;
+
+ return 0;
+}
+
+static int mchp_tc_count_cap_write(struct counter_device *counter,
+ struct counter_count *count, size_t idx, u64 val)
+{
+ struct mchp_tc_data *const priv = counter_priv(counter);
+
+ if (val > U32_MAX)
+ return -ERANGE;
+
+ switch (idx) {
+ case 0:
+ regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RA), val);
+ break;
+ case 1:
+ regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RB), val);
+ break;
+ case 2:
+ regmap_write(priv->regmap, ATMEL_TC_REG(priv->channel[0], RC), val);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static DEFINE_COUNTER_ARRAY_CAPTURE(mchp_tc_cnt_cap_array, 3);
+
+static struct counter_comp mchp_tc_count_ext[] = {
+ COUNTER_COMP_ARRAY_CAPTURE(mchp_tc_count_cap_read, mchp_tc_count_cap_write,
+ mchp_tc_cnt_cap_array),
+};
+
static struct counter_count mchp_tc_counts[] = {
{
.id = 0,
@@ -255,6 +311,8 @@ static struct counter_count mchp_tc_counts[] = {
.num_functions = ARRAY_SIZE(mchp_tc_count_functions),
.synapses = mchp_tc_count_synapses,
.num_synapses = ARRAY_SIZE(mchp_tc_count_synapses),
+ .ext = mchp_tc_count_ext,
+ .num_ext = ARRAY_SIZE(mchp_tc_count_ext),
},
};
--
2.48.1
