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pwm: cros-ec: Make use of devm_pwmchip_alloc() function

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This prepares the pwm-cros-ec driver to further changes of the pwm core
outlined in the commit introducing devm_pwmchip_alloc(). There is no
intended semantical change and the driver should behave as before.
The probe function had to be changed a bit because the number of PWMs
must be determined before allocation of the pwm_chip and its private
data now.

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/b0afe9e25340f0a274ff3806687cf37a6cc31557.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-02-14 10:31:18 +01:00
parent 19a568a8d3
commit 452be9421e
1 changed files with 19 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/pwm/pwm-cros-ec.c
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@ -19,13 +19,11 @@
* struct cros_ec_pwm_device - Driver data for EC PWM
*
* @ec: Pointer to EC device
* @chip: PWM controller chip
* @use_pwm_type: Use PWM types instead of generic channels
* @channel: array with per-channel data
*/
struct cros_ec_pwm_device {
struct cros_ec_device *ec;
struct pwm_chip chip;
bool use_pwm_type;
struct cros_ec_pwm *channel;
};
@ -40,7 +38,7 @@ struct cros_ec_pwm {
static inline struct cros_ec_pwm_device *pwm_to_cros_ec_pwm(struct pwm_chip *chip)
{
return container_of(chip, struct cros_ec_pwm_device, chip);
return pwmchip_get_drvdata(chip);
}
static int cros_ec_dt_type_to_pwm_type(u8 dt_index, u8 *pwm_type)
@ -264,34 +262,35 @@ static int cros_ec_pwm_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct cros_ec_pwm_device *ec_pwm;
struct pwm_chip *chip;
bool use_pwm_type = false;
unsigned int npwm;
int ret;
if (!ec)
return dev_err_probe(dev, -EINVAL, "no parent EC device\n");
ec_pwm = devm_kzalloc(dev, sizeof(*ec_pwm), GFP_KERNEL);
if (!ec_pwm)
return -ENOMEM;
chip = &ec_pwm->chip;
ec_pwm->ec = ec;
if (of_device_is_compatible(np, "google,cros-ec-pwm-type"))
ec_pwm->use_pwm_type = true;
/* PWM chip */
chip->dev = dev;
chip->ops = &cros_ec_pwm_ops;
chip->of_xlate = cros_ec_pwm_xlate;
if (ec_pwm->use_pwm_type) {
chip->npwm = CROS_EC_PWM_DT_COUNT;
if (of_device_is_compatible(np, "google,cros-ec-pwm-type")) {
use_pwm_type = true;
npwm = CROS_EC_PWM_DT_COUNT;
} else {
ret = cros_ec_num_pwms(ec);
if (ret < 0)
return dev_err_probe(dev, ret, "Couldn't find PWMs\n");
chip->npwm = ret;
npwm = ret;
}
chip = devm_pwmchip_alloc(dev, npwm, sizeof(*ec_pwm));
if (IS_ERR(chip))
return PTR_ERR(chip);
ec_pwm = pwm_to_cros_ec_pwm(chip);
ec_pwm->use_pwm_type = use_pwm_type;
ec_pwm->ec = ec;
/* PWM chip */
chip->ops = &cros_ec_pwm_ops;
chip->of_xlate = cros_ec_pwm_xlate;
ec_pwm->channel = devm_kcalloc(dev, chip->npwm, sizeof(*ec_pwm->channel),
GFP_KERNEL);
if (!ec_pwm->channel)