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pwm: Use dev_add_param_int for pwm parameters 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
This commit is contained in:
Sascha Hauer 2013-04-06 10:54:41 +02:00
parent c57fa97ee7
commit 3a9f068ccb
1 changed files with 30 additions and 59 deletions
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89
drivers/pwm/core.c
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@ -18,6 +18,7 @@
#include <malloc.h>
#include <pwm.h>
#include <linux/list.h>
#include <linux/err.h>
struct pwm_device {
struct pwm_chip *chip;
@ -26,22 +27,14 @@ struct pwm_device {
#define FLAG_ENABLED 1
struct list_head node;
struct device_d *dev;
unsigned int duty_ns;
unsigned int period_ns;
unsigned int p_enable;
};
static LIST_HEAD(pwm_list);
static struct pwm_device *dev_to_pwm(struct device_d *dev)
{
struct pwm_device *pwm;
list_for_each_entry(pwm, &pwm_list, node) {
if (pwm->dev == dev)
return pwm;
}
return NULL;
}
static struct pwm_device *_find_pwm(const char *devname)
{
struct pwm_device *pwm;
@ -54,61 +47,25 @@ static struct pwm_device *_find_pwm(const char *devname)
return NULL;
}
static int set_period_ns(struct device_d *dev, struct param_d *p,
const char *val)
static int set_duty_period_ns(struct param_d *p, void *priv)
{
struct pwm_device *pwm = dev_to_pwm(dev);
int period_ns;
struct pwm_device *pwm = priv;
if (!val)
return dev_param_set_generic(dev, p, NULL);
pwm_config(pwm, pwm->chip->duty_ns, pwm->chip->period_ns);
period_ns = simple_strtoul(val, NULL, 0);
pwm_config(pwm, pwm->chip->duty_ns, period_ns);
return dev_param_set_generic(dev, p, val);
return 0;
}
static int set_duty_ns(struct device_d *dev, struct param_d *p, const char *val)
static int set_enable(struct param_d *p, void *priv)
{
struct pwm_device *pwm = dev_to_pwm(dev);
int duty_ns;
struct pwm_device *pwm = priv;
if (!val)
return dev_param_set_generic(dev, p, NULL);
duty_ns = simple_strtoul(val, NULL, 0);
pwm_config(pwm, duty_ns, pwm->chip->period_ns);
return dev_param_set_generic(dev, p, val);
}
static int set_enable(struct device_d *dev, struct param_d *p, const char *val)
{
struct pwm_device *pwm = dev_to_pwm(dev);
int enable;
if (!val)
return dev_param_set_generic(dev, p, NULL);
enable = !!simple_strtoul(val, NULL, 0);
if (enable)
if (pwm->p_enable)
pwm_enable(pwm);
else
pwm_disable(pwm);
return dev_param_set_generic(dev, p, enable ? "1" : "0");
}
static int pwm_register_vars(struct device_d *dev)
{
int ret;
ret = dev_add_param(dev, "duty_ns", set_duty_ns, NULL, 0);
if (!ret)
ret = dev_add_param(dev, "period_ns", set_period_ns, NULL, 0);
if (!ret)
ret = dev_add_param(dev, "enable", set_enable, NULL, 0);
if (!ret)
ret = dev_set_param(dev, "enable", 0);
return ret;
return 0;
}
/**
@ -121,7 +78,7 @@ static int pwm_register_vars(struct device_d *dev)
int pwmchip_add(struct pwm_chip *chip, struct device_d *dev)
{
struct pwm_device *pwm;
int ret = 0;
struct param_d *p;
if (_find_pwm(chip->devname))
return -EBUSY;
@ -131,9 +88,23 @@ int pwmchip_add(struct pwm_chip *chip, struct device_d *dev)
pwm->dev = dev;
list_add_tail(&pwm->node, &pwm_list);
pwm_register_vars(dev);
return ret;
p = dev_add_param_int(dev, "duty_ns", set_duty_period_ns,
NULL, &pwm->chip->duty_ns, "%u", pwm);
if (IS_ERR(p))
return PTR_ERR(p);
p = dev_add_param_int(dev, "period_ns", set_duty_period_ns,
NULL, &pwm->chip->period_ns, "%u", pwm);
if (IS_ERR(p))
return PTR_ERR(p);
p = dev_add_param_bool(dev, "enable", set_enable,
NULL, &pwm->p_enable, pwm);
if (IS_ERR(p))
return PTR_ERR(p);
return 0;
}
EXPORT_SYMBOL_GPL(pwmchip_add);