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pwm: renesas-tpu: Make use of devm_pwmchip_alloc() function

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This prepares the pwm-renesas-tpu 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.

Also convert the to_tpu_device() helper macro to a static inline to get
some type safety.

Link: https://lore.kernel.org/r/aac4a9546b0f474d991144aa925c83cfa7abe2c0.1707900770.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 10:32:17 +01:00
parent f0d907605d
commit 3a284e0eae
1 changed files with 11 additions and 9 deletions
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20
drivers/pwm/pwm-renesas-tpu.c
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@ -79,7 +79,6 @@ struct tpu_pwm_device {
struct tpu_device {
struct platform_device *pdev;
struct pwm_chip chip;
spinlock_t lock;
void __iomem *base;
@ -87,7 +86,10 @@ struct tpu_device {
struct tpu_pwm_device tpd[TPU_CHANNEL_MAX];
};
#define to_tpu_device(c) container_of(c, struct tpu_device, chip)
static inline struct tpu_device *to_tpu_device(struct pwm_chip *chip)
{
return pwmchip_get_drvdata(chip);
}
static void tpu_pwm_write(struct tpu_pwm_device *tpd, int reg_nr, u16 value)
{
@ -438,12 +440,14 @@ static const struct pwm_ops tpu_pwm_ops = {
static int tpu_probe(struct platform_device *pdev)
{
struct pwm_chip *chip;
struct tpu_device *tpu;
int ret;
tpu = devm_kzalloc(&pdev->dev, sizeof(*tpu), GFP_KERNEL);
if (tpu == NULL)
return -ENOMEM;
chip = devm_pwmchip_alloc(&pdev->dev, TPU_CHANNEL_MAX, sizeof(*tpu));
if (IS_ERR(chip))
return PTR_ERR(chip);
tpu = to_tpu_device(chip);
spin_lock_init(&tpu->lock);
tpu->pdev = pdev;
@ -460,15 +464,13 @@ static int tpu_probe(struct platform_device *pdev)
/* Initialize and register the device. */
platform_set_drvdata(pdev, tpu);
tpu->chip.dev = &pdev->dev;
tpu->chip.ops = &tpu_pwm_ops;
tpu->chip.npwm = TPU_CHANNEL_MAX;
chip->ops = &tpu_pwm_ops;
ret = devm_pm_runtime_enable(&pdev->dev);
if (ret < 0)
return dev_err_probe(&pdev->dev, ret, "Failed to enable runtime PM\n");
ret = devm_pwmchip_add(&pdev->dev, &tpu->chip);
ret = devm_pwmchip_add(&pdev->dev, chip);
if (ret < 0)
return dev_err_probe(&pdev->dev, ret, "Failed to register PWM chip\n");