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Subject[PATCH v3 3/7] pwm: rockchip: Use pwm_apply instead of the pwm_enable
Date
Drop the custom hook of pwm_enable and implement
pwm_apply_v1 and pwm_apply_v2 instead.

Signed-off-by: David Wu <david.wu@rock-chips.com>
---
drivers/pwm/pwm-rockchip.c | 141 +++++++++++++++++++++++++--------------------
1 file changed, 77 insertions(+), 64 deletions(-)

diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index 33bbb5a..4bbecbd 100644
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c
@@ -51,11 +51,10 @@ struct rockchip_pwm_data {
bool supports_polarity;
const struct pwm_ops *ops;

- void (*set_enable)(struct pwm_chip *chip,
- struct pwm_device *pwm, bool enable,
- enum pwm_polarity polarity);
void (*get_state)(struct pwm_chip *chip, struct pwm_device *pwm,
struct pwm_state *state);
+ int (*pwm_apply)(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state);
};

static inline struct rockchip_pwm_chip *to_rockchip_pwm_chip(struct pwm_chip *c)
@@ -63,24 +62,6 @@ static inline struct rockchip_pwm_chip *to_rockchip_pwm_chip(struct pwm_chip *c)
return container_of(c, struct rockchip_pwm_chip, chip);
}

-static void rockchip_pwm_set_enable_v1(struct pwm_chip *chip,
- struct pwm_device *pwm, bool enable,
- enum pwm_polarity polarity)
-{
- struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
- u32 enable_conf = PWM_CTRL_OUTPUT_EN | PWM_CTRL_TIMER_EN;
- u32 val;
-
- val = readl_relaxed(pc->base + pc->data->regs.ctrl);
-
- if (enable)
- val |= enable_conf;
- else
- val &= ~enable_conf;
-
- writel_relaxed(val, pc->base + pc->data->regs.ctrl);
-}
-
static void rockchip_pwm_get_state_v1(struct pwm_chip *chip,
struct pwm_device *pwm,
struct pwm_state *state)
@@ -94,30 +75,6 @@ static void rockchip_pwm_get_state_v1(struct pwm_chip *chip,
state->enabled = true;
}

-static void rockchip_pwm_set_enable_v2(struct pwm_chip *chip,
- struct pwm_device *pwm, bool enable,
- enum pwm_polarity polarity)
-{
- struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
- u32 enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
- PWM_CONTINUOUS;
- u32 val;
-
- if (polarity == PWM_POLARITY_INVERSED)
- enable_conf |= PWM_DUTY_NEGATIVE | PWM_INACTIVE_POSITIVE;
- else
- enable_conf |= PWM_DUTY_POSITIVE | PWM_INACTIVE_NEGATIVE;
-
- val = readl_relaxed(pc->base + pc->data->regs.ctrl);
-
- if (enable)
- val |= enable_conf;
- else
- val &= ~enable_conf;
-
- writel_relaxed(val, pc->base + pc->data->regs.ctrl);
-}
-
static void rockchip_pwm_get_state_v2(struct pwm_chip *chip,
struct pwm_device *pwm,
struct pwm_state *state)
@@ -193,10 +150,12 @@ static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
static int rockchip_pwm_enable(struct pwm_chip *chip,
struct pwm_device *pwm,
bool enable,
- enum pwm_polarity polarity)
+ enum pwm_polarity polarity,
+ u32 enable_conf)
{
struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
int ret;
+ u32 val;

if (enable) {
ret = clk_enable(pc->clk);
@@ -204,7 +163,23 @@ static int rockchip_pwm_enable(struct pwm_chip *chip,
return ret;
}

- pc->data->set_enable(chip, pwm, enable, polarity);
+ if (pc->data->supports_polarity) {
+ if (polarity == PWM_POLARITY_INVERSED)
+ enable_conf |= PWM_DUTY_NEGATIVE |
+ PWM_INACTIVE_POSITIVE;
+ else
+ enable_conf |= PWM_DUTY_POSITIVE |
+ PWM_INACTIVE_NEGATIVE;
+ }
+
+ val = readl_relaxed(pc->base + pc->data->regs.ctrl);
+
+ if (enable)
+ val |= enable_conf;
+ else
+ val &= ~enable_conf;
+
+ writel_relaxed(val, pc->base + pc->data->regs.ctrl);

if (!enable)
clk_disable(pc->clk);
@@ -212,37 +187,75 @@ static int rockchip_pwm_enable(struct pwm_chip *chip,
return 0;
}

-static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
- struct pwm_state *state)
+static int rockchip_pwm_apply_v1(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
{
- struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
+ u32 enable_conf = PWM_CTRL_OUTPUT_EN | PWM_CTRL_TIMER_EN;
struct pwm_state curstate;
bool enabled;
- int ret;
+ int ret = 0;

pwm_get_state(pwm, &curstate);
enabled = curstate.enabled;

- ret = clk_enable(pc->pclk);
- if (ret)
- return ret;
-
if (state->polarity != curstate.polarity && enabled) {
- ret = rockchip_pwm_enable(chip, pwm, false, state->polarity);
+ ret = rockchip_pwm_enable(chip, pwm, false, state->polarity,
+ enable_conf);
if (ret)
- goto out;
+ return ret;
enabled = false;
}

rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period);
-
- if (state->enabled != enabled) {
+ if (state->enabled != enabled)
ret = rockchip_pwm_enable(chip, pwm, state->enabled,
- state->polarity);
+ state->polarity, enable_conf);
+
+ return ret;
+}
+
+static int rockchip_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ u32 enable_conf = PWM_OUTPUT_LEFT | PWM_LP_DISABLE | PWM_ENABLE |
+ PWM_CONTINUOUS;
+ struct pwm_state curstate;
+ bool enabled;
+ int ret = 0;
+
+ pwm_get_state(pwm, &curstate);
+ enabled = curstate.enabled;
+
+ if (state->polarity != curstate.polarity && enabled) {
+ ret = rockchip_pwm_enable(chip, pwm, false, state->polarity,
+ enable_conf);
if (ret)
- goto out;
+ return ret;
+ enabled = false;
}

+ rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period);
+ if (state->enabled != enabled)
+ ret = rockchip_pwm_enable(chip, pwm, state->enabled,
+ state->polarity, enable_conf);
+
+ return ret;
+}
+
+static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
+ int ret;
+
+ ret = clk_enable(pc->pclk);
+ if (ret)
+ return ret;
+
+ ret = pc->data->pwm_apply(chip, pwm, state);
+ if (ret)
+ goto out;
+
/*
* Update the state with the real hardware, which can differ a bit
* because of period/duty_cycle approximation.
@@ -276,8 +289,8 @@ static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
},
.prescaler = 2,
.ops = &rockchip_pwm_ops_v1,
- .set_enable = rockchip_pwm_set_enable_v1,
.get_state = rockchip_pwm_get_state_v1,
+ .pwm_apply = rockchip_pwm_apply_v1,
};

static const struct rockchip_pwm_data pwm_data_v2 = {
@@ -290,8 +303,8 @@ static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
.prescaler = 1,
.supports_polarity = true,
.ops = &rockchip_pwm_ops_v2,
- .set_enable = rockchip_pwm_set_enable_v2,
.get_state = rockchip_pwm_get_state_v2,
+ .pwm_apply = rockchip_pwm_apply_v2,
};

static const struct rockchip_pwm_data pwm_data_vop = {
@@ -304,8 +317,8 @@ static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
.prescaler = 1,
.supports_polarity = true,
.ops = &rockchip_pwm_ops_v2,
- .set_enable = rockchip_pwm_set_enable_v2,
.get_state = rockchip_pwm_get_state_v2,
+ .pwm_apply = rockchip_pwm_apply_v2,
};

static const struct of_device_id rockchip_pwm_dt_ids[] = {
--
1.9.1

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