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Subject[PATCH 2/2] pwm: hibvt: Add hi3559v100 support
Date
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 | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/drivers/pwm/pwm-hibvt.c b/drivers/pwm/pwm-hibvt.c
index 27c107e78d59..bf33aa24433c 100644
--- a/drivers/pwm/pwm-hibvt.c
+++ b/drivers/pwm/pwm-hibvt.c
@@ -49,6 +49,7 @@ struct hibvt_pwm_chip {
struct clk *clk;
void __iomem *base;
struct reset_control *rstc;
+ bool quirk_force_enable;
};

struct hibvt_pwm_soc {
@@ -56,6 +57,7 @@ struct hibvt_pwm_soc {
};

static const struct hibvt_pwm_soc pwm_soc[2] = {
+ { .num_pwms = 2 },
{ .num_pwms = 4 },
{ .num_pwms = 8 },
};
@@ -148,13 +150,19 @@ 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);

+ if (hi_pwm_chip->quirk_force_enable && state->enabled)
+ hibvt_pwm_enable(chip, pwm);
+ }
+
if (state->enabled != pwm->state.enabled) {
if (state->enabled)
hibvt_pwm_enable(chip, pwm);
@@ -176,6 +184,7 @@ static int hibvt_pwm_probe(struct platform_device *pdev)
{
const struct hibvt_pwm_soc *soc =
of_device_get_match_data(&pdev->dev);
+ struct device_node *np = pdev->dev.of_node;
struct hibvt_pwm_chip *pwm_chip;
struct resource *res;
int ret;
@@ -199,6 +208,15 @@ static int hibvt_pwm_probe(struct platform_device *pdev)
pwm_chip->chip.of_xlate = of_pwm_xlate_with_flags;
pwm_chip->chip.of_pwm_n_cells = 3;

+ /*
+ * On those platforms, it is required to enable the
+ * pwm again each time we want to refresh the duty
+ * cycle.
+ */
+ if (of_device_is_compatible(np, "hisilicon,hi3559v100-shub-pwm") ||
+ of_device_is_compatible(np, "hisilicon,hi3559v100-pwm"))
+ pwm_chip->quirk_force_enable = true;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pwm_chip->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pwm_chip->base))
@@ -250,8 +268,10 @@ static int hibvt_pwm_remove(struct platform_device *pdev)
}

static const struct of_device_id hibvt_pwm_of_match[] = {
- { .compatible = "hisilicon,hi3516cv300-pwm", .data = &pwm_soc[0] },
- { .compatible = "hisilicon,hi3519v100-pwm", .data = &pwm_soc[1] },
+ { .compatible = "hisilicon,hi3516cv300-pwm", .data = &pwm_soc[1] },
+ { .compatible = "hisilicon,hi3519v100-pwm", .data = &pwm_soc[2] },
+ { .compatible = "hisilicon,hi3559v100-shub-pwm", .data = &pwm_soc[2] },
+ { .compatible = "hisilicon,hi3559v100-pwm", .data = &pwm_soc[0] },
{ }
};
MODULE_DEVICE_TABLE(of, hibvt_pwm_of_match);
--
2.17.1
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