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pwm: rockchip: Use pwm_apply() instead of pwm_enable() 

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>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
David Wu 2017-08-08 23:38:31 +08:00 committed by Thierry Reding
parent f90df9cda6
commit ed054693d7
1 changed files with 78 additions and 63 deletions
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141
drivers/pwm/pwm-rockchip.c
View File

@ -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 +187,77 @@ 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 +291,8 @@ static const struct rockchip_pwm_data pwm_data_v1 = {
},
.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 +305,8 @@ static const struct rockchip_pwm_data pwm_data_v2 = {
.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 +319,8 @@ static const struct rockchip_pwm_data pwm_data_vop = {
.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[] = {