[PATCH v3 3/3] pwm: hibvt: Add hi3559v100 support

Mathieu Othacehe
2019-02-19T09:58:45Z

Add support for hi3559v100-shub-pwm and hisilicon,hi3559v100-pwm
platforms. They require a special quirk: pwm has to be enabled again
to force duty_cycle refresh.

Signed-off-by: Mathieu Othacehe <m.othacehe@gmail.com>
---
drivers/pwm/pwm-hibvt.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/pwm/pwm-hibvt.c b/drivers/pwm/pwm-hibvt.c
index ffc803818c3c..f81c6fcb79be 100644
--- a/drivers/pwm/pwm-hibvt.c
+++ b/drivers/pwm/pwm-hibvt.c
@@ -54,6 +54,7 @@ struct hibvt_pwm_chip {

struct hibvt_pwm_soc {
u32 num_pwms;
+ bool quirk_force_enable;
};

static const struct hibvt_pwm_soc hi3516cv300_soc_info = {
@@ -64,6 +65,16 @@ static const struct hibvt_pwm_soc hi3519v100_soc_info = {
.num_pwms = 8,
};

+static const struct hibvt_pwm_soc hi3559v100_shub_soc_info = {
+ .num_pwms = 8,
+ .quirk_force_enable = true,
+};
+
+static const struct hibvt_pwm_soc hi3559v100_soc_info = {
+ .num_pwms = 2,
+ .quirk_force_enable = true,
+};
+
static inline struct hibvt_pwm_chip *to_hibvt_pwm_chip(struct pwm_chip *chip)
{
return container_of(chip, struct hibvt_pwm_chip, chip);
@@ -152,13 +163,23 @@ static void hibvt_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
static int hibvt_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
struct pwm_state *state)
{
+ struct hibvt_pwm_chip *hi_pwm_chip = to_hibvt_pwm_chip(chip);
+
if (state->polarity != pwm->state.polarity)
hibvt_pwm_set_polarity(chip, pwm, state->polarity);

if (state->period != pwm->state.period ||
- state->duty_cycle != pwm->state.duty_cycle)
+ state->duty_cycle != pwm->state.duty_cycle) {
hibvt_pwm_config(chip, pwm, state->duty_cycle, state->period);

+ /*
+ * Some implementations require the pwm to be enabled
+ * once more each time the duty cycle is refreshed.
+ */
+ if (hi_pwm_chip->soc->quirk_force_enable && state->enabled)
+ hibvt_pwm_enable(chip, pwm);
+ }
+
if (state->enabled != pwm->state.enabled) {
if (state->enabled)
hibvt_pwm_enable(chip, pwm);
@@ -259,6 +280,10 @@ static const struct of_device_id hibvt_pwm_of_match[] = {
.data = &hi3516cv300_soc_info },
{ .compatible = "hisilicon,hi3519v100-pwm",
.data = &hi3519v100_soc_info },
+ { .compatible = "hisilicon,hi3559v100-shub-pwm",
+ .data = &hi3559v100_shub_soc_info },
+ { .compatible = "hisilicon,hi3559v100-pwm",
+ .data = &hi3559v100_soc_info },
{ }
};
MODULE_DEVICE_TABLE(of, hibvt_pwm_of_match);
--
2.17.1