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pwm: raspberrypi-poe: Make use of devm_pwmchip_alloc() function

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This prepares the pwm-raspberrypi-poe 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.

Link: https://lore.kernel.org/r/4654a6438ab618574afc3bb73bf402df7c254ee2.1707900770.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 10:32:13 +01:00
parent fd20a3e1fc
commit 05aa788c06
1 changed files with 9 additions and 9 deletions
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18
drivers/pwm/pwm-raspberrypi-poe.c
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@ -27,7 +27,6 @@
struct raspberrypi_pwm {
struct rpi_firmware *firmware;
struct pwm_chip chip;
unsigned int duty_cycle;
};
@ -40,7 +39,7 @@ struct raspberrypi_pwm_prop {
static inline
struct raspberrypi_pwm *raspberrypi_pwm_from_chip(struct pwm_chip *chip)
{
return container_of(chip, struct raspberrypi_pwm, chip);
return pwmchip_get_drvdata(chip);
}
static int raspberrypi_pwm_set_property(struct rpi_firmware *firmware,
@ -142,6 +141,7 @@ static int raspberrypi_pwm_probe(struct platform_device *pdev)
struct device_node *firmware_node;
struct device *dev = &pdev->dev;
struct rpi_firmware *firmware;
struct pwm_chip *chip;
struct raspberrypi_pwm *rpipwm;
int ret;
@ -157,14 +157,14 @@ static int raspberrypi_pwm_probe(struct platform_device *pdev)
return dev_err_probe(dev, -EPROBE_DEFER,
"Failed to get firmware handle\n");
rpipwm = devm_kzalloc(&pdev->dev, sizeof(*rpipwm), GFP_KERNEL);
if (!rpipwm)
return -ENOMEM;
chip = devm_pwmchip_alloc(&pdev->dev, RASPBERRYPI_FIRMWARE_PWM_NUM,
sizeof(*rpipwm));
if (IS_ERR(chip))
return PTR_ERR(chip);
rpipwm = raspberrypi_pwm_from_chip(chip);
rpipwm->firmware = firmware;
rpipwm->chip.dev = dev;
rpipwm->chip.ops = &raspberrypi_pwm_ops;
rpipwm->chip.npwm = RASPBERRYPI_FIRMWARE_PWM_NUM;
chip->ops = &raspberrypi_pwm_ops;
ret = raspberrypi_pwm_get_property(rpipwm->firmware, RPI_PWM_CUR_DUTY_REG,
&rpipwm->duty_cycle);
@ -173,7 +173,7 @@ static int raspberrypi_pwm_probe(struct platform_device *pdev)
return ret;
}
return devm_pwmchip_add(dev, &rpipwm->chip);
return devm_pwmchip_add(dev, chip);
}
static const struct of_device_id raspberrypi_pwm_of_match[] = {