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pwm: core: add oneshot_repeat and duty_offset attributes

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Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Change-Id: I39caf2cc449499afc51097724a28cc2055ab149f
This commit is contained in:
Damon Ding
2023-06-26 10:22:17 +08:00
committed by Tao Huang
parent a8165608c7
commit 0b024bc977
3 changed files with 78 additions and 0 deletions
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2
drivers/pwm/core.c
View File

@@ -587,6 +587,8 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
state->polarity == pwm->state.polarity &&
#ifdef CONFIG_PWM_ROCKCHIP_ONESHOT
state->oneshot_count == pwm->state.oneshot_count &&
state->oneshot_repeat == pwm->state.oneshot_repeat &&
state->duty_offset == pwm->state.duty_offset &&
#endif
state->enabled == pwm->state.enabled)
return 0;

74
drivers/pwm/sysfs.c
View File

@@ -138,6 +138,76 @@ static ssize_t oneshot_count_store(struct device *child,
return ret ? : size;
}
static ssize_t oneshot_repeat_show(struct device *child,
struct device_attribute *attr,
char *buf)
{
const struct pwm_device *pwm = child_to_pwm_device(child);
struct pwm_state state;
pwm_get_state(pwm, &state);
return sprintf(buf, "%u\n", state.oneshot_repeat);
}
static ssize_t oneshot_repeat_store(struct device *child,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
struct pwm_state state;
unsigned int val;
int ret;
ret = kstrtouint(buf, 0, &val);
if (ret)
return ret;
mutex_lock(&export->lock);
pwm_get_state(pwm, &state);
state.oneshot_repeat = val;
ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
}
static ssize_t duty_offset_show(struct device *child,
struct device_attribute *attr,
char *buf)
{
const struct pwm_device *pwm = child_to_pwm_device(child);
struct pwm_state state;
pwm_get_state(pwm, &state);
return sprintf(buf, "%llu\n", state.duty_offset);
}
static ssize_t duty_offset_store(struct device *child,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
struct pwm_state state;
u64 val;
int ret;
ret = kstrtou64(buf, 0, &val);
if (ret)
return ret;
mutex_lock(&export->lock);
pwm_get_state(pwm, &state);
state.duty_offset = val;
ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
}
#endif
static ssize_t enable_show(struct device *child,
@@ -279,6 +349,8 @@ static DEVICE_ATTR_RW(period);
static DEVICE_ATTR_RW(duty_cycle);
#ifdef CONFIG_PWM_ROCKCHIP_ONESHOT
static DEVICE_ATTR_RW(oneshot_count);
static DEVICE_ATTR_RW(oneshot_repeat);
static DEVICE_ATTR_RW(duty_offset);
#endif
static DEVICE_ATTR_RW(enable);
static DEVICE_ATTR_RW(polarity);
@@ -290,6 +362,8 @@ static struct attribute *pwm_attrs[] = {
&dev_attr_duty_cycle.attr,
#ifdef CONFIG_PWM_ROCKCHIP_ONESHOT
&dev_attr_oneshot_count.attr,
&dev_attr_oneshot_repeat.attr,
&dev_attr_duty_offset.attr,
#endif
&dev_attr_enable.attr,
&dev_attr_polarity.attr,

2
include/linux/pwm.h
View File

@@ -74,6 +74,8 @@ struct pwm_state {
enum pwm_output_type output_type;
#ifdef CONFIG_PWM_ROCKCHIP_ONESHOT
u64 oneshot_count;
u32 oneshot_repeat;
u64 duty_offset;
#endif /* CONFIG_PWM_ROCKCHIP_ONESHOT */
bool enabled;
};