pwm: lpss-*: Make use of devm_pwmchip_alloc() function

This prepares the pwm-lpss drivers 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.

Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/b567ab5dd992e361eb884fa6c2cac11be9c7dde3.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

4 files changed, 20 insertions, 21 deletions

diff --git a/drivers/pwm/pwm-lpss-pci.c b/drivers/pwm/pwm-lpss-pci.c
index 34acfe99b74f..25045c229520 100644
--- a/drivers/pwm/pwm-lpss-pci.c
+++ b/drivers/pwm/pwm-lpss-pci.c
@@ -18,7 +18,7 @@ static int pwm_lpss_probe_pci(struct pci_dev *pdev,
 			      const struct pci_device_id *id)
 {
 	const struct pwm_lpss_boardinfo *info;
-	struct pwm_lpss_chip *lpwm;
+	struct pwm_chip *chip;
 	int err;
 
 	err = pcim_enable_device(pdev);
@@ -30,9 +30,9 @@ static int pwm_lpss_probe_pci(struct pci_dev *pdev,
 		return err;
 
 	info = (struct pwm_lpss_boardinfo *)id->driver_data;
-	lpwm = devm_pwm_lpss_probe(&pdev->dev, pcim_iomap_table(pdev)[0], info);
-	if (IS_ERR(lpwm))
-		return PTR_ERR(lpwm);
+	chip = devm_pwm_lpss_probe(&pdev->dev, pcim_iomap_table(pdev)[0], info);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
 
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_allow(&pdev->dev);
diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c
index 5f6ee300e342..dbc9f5b17bdc 100644
--- a/drivers/pwm/pwm-lpss-platform.c
+++ b/drivers/pwm/pwm-lpss-platform.c
@@ -20,7 +20,7 @@
 static int pwm_lpss_probe_platform(struct platform_device *pdev)
 {
 	const struct pwm_lpss_boardinfo *info;
-	struct pwm_lpss_chip *lpwm;
+	struct pwm_chip *chip;
 	void __iomem *base;
 
 	info = device_get_match_data(&pdev->dev);
@@ -31,9 +31,9 @@ static int pwm_lpss_probe_platform(struct platform_device *pdev)
 	if (IS_ERR(base))
 		return PTR_ERR(base);
 
-	lpwm = devm_pwm_lpss_probe(&pdev->dev, base, info);
-	if (IS_ERR(lpwm))
-		return PTR_ERR(lpwm);
+	chip = devm_pwm_lpss_probe(&pdev->dev, base, info);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
 
 	/*
 	 * On Cherry Trail devices the GFX0._PS0 AML checks if the controller
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 394c768f5a5f..867e2bc8c601 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -68,7 +68,7 @@ EXPORT_SYMBOL_GPL(pwm_lpss_tng_info);
 
 static inline struct pwm_lpss_chip *to_lpwm(struct pwm_chip *chip)
 {
-	return container_of(chip, struct pwm_lpss_chip, chip);
+	return pwmchip_get_drvdata(chip);
 }
 
 static inline u32 pwm_lpss_read(const struct pwm_device *pwm)
@@ -245,10 +245,11 @@ static const struct pwm_ops pwm_lpss_ops = {
 	.get_state = pwm_lpss_get_state,
 };
 
-struct pwm_lpss_chip *devm_pwm_lpss_probe(struct device *dev, void __iomem *base,
-					  const struct pwm_lpss_boardinfo *info)
+struct pwm_chip *devm_pwm_lpss_probe(struct device *dev, void __iomem *base,
+				     const struct pwm_lpss_boardinfo *info)
 {
 	struct pwm_lpss_chip *lpwm;
+	struct pwm_chip *chip;
 	unsigned long c;
 	int i, ret;
 	u32 ctrl;
@@ -256,9 +257,10 @@ struct pwm_lpss_chip *devm_pwm_lpss_probe(struct device *dev, void __iomem *base
 	if (WARN_ON(info->npwm > LPSS_MAX_PWMS))
 		return ERR_PTR(-ENODEV);
 
-	lpwm = devm_kzalloc(dev, sizeof(*lpwm), GFP_KERNEL);
-	if (!lpwm)
-		return ERR_PTR(-ENOMEM);
+	chip = devm_pwmchip_alloc(dev, info->npwm, sizeof(*lpwm));
+	if (IS_ERR(chip))
+		return chip;
+	lpwm = to_lpwm(chip);
 
 	lpwm->regs = base;
 	lpwm->info = info;
@@ -267,23 +269,21 @@ struct pwm_lpss_chip *devm_pwm_lpss_probe(struct device *dev, void __iomem *base
 	if (!c)
 		return ERR_PTR(-EINVAL);
 
-	lpwm->chip.dev = dev;
-	lpwm->chip.ops = &pwm_lpss_ops;
-	lpwm->chip.npwm = info->npwm;
+	chip->ops = &pwm_lpss_ops;
 
-	ret = devm_pwmchip_add(dev, &lpwm->chip);
+	ret = devm_pwmchip_add(dev, chip);
 	if (ret) {
 		dev_err(dev, "failed to add PWM chip: %d\n", ret);
 		return ERR_PTR(ret);
 	}
 
 	for (i = 0; i < lpwm->info->npwm; i++) {
-		ctrl = pwm_lpss_read(&lpwm->chip.pwms[i]);
+		ctrl = pwm_lpss_read(&chip->pwms[i]);
 		if (ctrl & PWM_ENABLE)
 			pm_runtime_get(dev);
 	}
 
-	return lpwm;
+	return chip;
 }
 EXPORT_SYMBOL_GPL(devm_pwm_lpss_probe);
 
diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h
index bf841250385f..b5267ab5193b 100644
--- a/drivers/pwm/pwm-lpss.h
+++ b/drivers/pwm/pwm-lpss.h
@@ -18,7 +18,6 @@
 #define LPSS_MAX_PWMS			4
 
 struct pwm_lpss_chip {
-	struct pwm_chip chip;
 	void __iomem *regs;
 	const struct pwm_lpss_boardinfo *info;
 };