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authorBoris Brezillon <boris.brezillon@free-electrons.com>2016-04-14 21:17:43 +0200
committerThierry Reding <thierry.reding@gmail.com>2016-05-17 14:48:04 +0200
commit39100ceea79ff2efeb2fb094baf120c73d5ccf47 (patch)
tree514b770fcf46d7bc675abc44c947fc1e79ba42ea
parenta07136fdcf12281781142caf1f78c6696721accd (diff)
pwm: Switch to the atomic API
Replace legacy pwm_get/set_xxx() and pwm_config/enable/disable() calls by pwm_get/apply_state(). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
-rw-r--r--drivers/pwm/core.c5
-rw-r--r--drivers/pwm/sysfs.c48
2 files changed, 41 insertions, 12 deletions
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 729d457..b0b87b3 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -948,13 +948,16 @@ static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s)
for (i = 0; i < chip->npwm; i++) {
struct pwm_device *pwm = &chip->pwms[i];
+ struct pwm_state state;
+
+ pwm_get_state(pwm, &state);
seq_printf(s, " pwm-%-3d (%-20.20s):", i, pwm->label);
if (test_bit(PWMF_REQUESTED, &pwm->flags))
seq_puts(s, " requested");
- if (pwm_is_enabled(pwm))
+ if (state.enabled)
seq_puts(s, " enabled");
seq_puts(s, "\n");
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index 187ca08..d985992 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -46,8 +46,11 @@ static ssize_t period_show(struct device *child,
char *buf)
{
const struct pwm_device *pwm = child_to_pwm_device(child);
+ struct pwm_state state;
- return sprintf(buf, "%u\n", pwm_get_period(pwm));
+ pwm_get_state(pwm, &state);
+
+ return sprintf(buf, "%u\n", state.period);
}
static ssize_t period_store(struct device *child,
@@ -56,6 +59,7 @@ static ssize_t period_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
unsigned int val;
int ret;
@@ -64,7 +68,9 @@ static ssize_t period_store(struct device *child,
return ret;
mutex_lock(&export->lock);
- ret = pwm_config(pwm, pwm_get_duty_cycle(pwm), val);
+ pwm_get_state(pwm, &state);
+ state.period = val;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
@@ -75,8 +81,11 @@ static ssize_t duty_cycle_show(struct device *child,
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", pwm_get_duty_cycle(pwm));
+ return sprintf(buf, "%u\n", state.duty_cycle);
}
static ssize_t duty_cycle_store(struct device *child,
@@ -85,6 +94,7 @@ static ssize_t duty_cycle_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
unsigned int val;
int ret;
@@ -93,7 +103,9 @@ static ssize_t duty_cycle_store(struct device *child,
return ret;
mutex_lock(&export->lock);
- ret = pwm_config(pwm, val, pwm_get_period(pwm));
+ pwm_get_state(pwm, &state);
+ state.duty_cycle = val;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;
@@ -104,8 +116,11 @@ static ssize_t enable_show(struct device *child,
char *buf)
{
const struct pwm_device *pwm = child_to_pwm_device(child);
+ struct pwm_state state;
- return sprintf(buf, "%d\n", pwm_is_enabled(pwm));
+ pwm_get_state(pwm, &state);
+
+ return sprintf(buf, "%d\n", state.enabled);
}
static ssize_t enable_store(struct device *child,
@@ -114,6 +129,7 @@ static ssize_t enable_store(struct device *child,
{
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
+ struct pwm_state state;
int val, ret;
ret = kstrtoint(buf, 0, &val);
@@ -122,20 +138,24 @@ static ssize_t enable_store(struct device *child,
mutex_lock(&export->lock);
+ pwm_get_state(pwm, &state);
+
switch (val) {
case 0:
- pwm_disable(pwm);
+ state.enabled = false;
break;
case 1:
- ret = pwm_enable(pwm);
+ state.enabled = true;
break;
default:
ret = -EINVAL;
- break;
+ goto unlock;
}
- mutex_unlock(&export->lock);
+ pwm_apply_state(pwm, &state);
+unlock:
+ mutex_unlock(&export->lock);
return ret ? : size;
}
@@ -145,8 +165,11 @@ static ssize_t polarity_show(struct device *child,
{
const struct pwm_device *pwm = child_to_pwm_device(child);
const char *polarity = "unknown";
+ struct pwm_state state;
+
+ pwm_get_state(pwm, &state);
- switch (pwm_get_polarity(pwm)) {
+ switch (state.polarity) {
case PWM_POLARITY_NORMAL:
polarity = "normal";
break;
@@ -166,6 +189,7 @@ static ssize_t polarity_store(struct device *child,
struct pwm_export *export = child_to_pwm_export(child);
struct pwm_device *pwm = export->pwm;
enum pwm_polarity polarity;
+ struct pwm_state state;
int ret;
if (sysfs_streq(buf, "normal"))
@@ -176,7 +200,9 @@ static ssize_t polarity_store(struct device *child,
return -EINVAL;
mutex_lock(&export->lock);
- ret = pwm_set_polarity(pwm, polarity);
+ pwm_get_state(pwm, &state);
+ state.polarity = polarity;
+ ret = pwm_apply_state(pwm, &state);
mutex_unlock(&export->lock);
return ret ? : size;