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.othac...@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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