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PWM: Use a separate device for PWMs 

Instead of directly using the hardware devicet for PWMs register
a logical PWM device so that the user operates on pwmx devices rather
than pxa-pwmx.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-02-13 10:15:56 +01:00
parent b069d6b876
commit 5da563f1e6
1 changed files with 15 additions and 5 deletions
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20
drivers/pwm/core.c
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@ -26,7 +26,8 @@ struct pwm_device {
#define FLAG_REQUESTED 0
#define FLAG_ENABLED 1
struct list_head node;
struct device_d *dev;
struct device_d *hwdev;
struct device_d dev;
unsigned int duty_ns;
unsigned int period_ns;
@ -79,27 +80,36 @@ int pwmchip_add(struct pwm_chip *chip, struct device_d *dev)
{
struct pwm_device *pwm;
struct param_d *p;
int ret;
if (_find_pwm(chip->devname))
return -EBUSY;
pwm = xzalloc(sizeof(*pwm));
pwm->chip = chip;
pwm->dev = dev;
pwm->hwdev = dev;
strcpy(pwm->dev.name, chip->devname);
pwm->dev.id = DEVICE_ID_SINGLE;
pwm->dev.parent = dev;
ret = register_device(&pwm->dev);
if (ret)
return ret;
list_add_tail(&pwm->node, &pwm_list);
p = dev_add_param_int(dev, "duty_ns", set_duty_period_ns,
p = dev_add_param_int(&pwm->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,
p = dev_add_param_int(&pwm->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,
p = dev_add_param_bool(&pwm->dev, "enable", set_enable,
NULL, &pwm->p_enable, pwm);
if (IS_ERR(p))
return PTR_ERR(p);