[PATCH 1/5] pwm: sun20i: Use devm_pwmchip_alloc() helper

[Hironori KIKUCHI <kikuchan98@xxxxxxxxx>]

This patch fixes a compile error by using the devm_pwmchip_alloc() helper
function along the way.

Signed-off-by: Hironori KIKUCHI <kikuchan98@xxxxxxxxx>
---
 drivers/pwm/pwm-sun20i.c | 45 ++++++++++++++++++++++------------------
 1 file changed, 25 insertions(+), 20 deletions(-)

diff --git a/drivers/pwm/pwm-sun20i.c b/drivers/pwm/pwm-sun20i.c
index 3e3b5b138b3..93782023af6 100644
--- a/drivers/pwm/pwm-sun20i.c
+++ b/drivers/pwm/pwm-sun20i.c
@@ -102,7 +102,7 @@ struct sun20i_pwm_chip {
 
 static inline struct sun20i_pwm_chip *to_sun20i_pwm_chip(struct pwm_chip *chip)
 {
-	return container_of(chip, struct sun20i_pwm_chip, chip);
+	return pwmchip_get_drvdata(chip);
 }
 
 static inline u32 sun20i_pwm_readl(struct sun20i_pwm_chip *chip,
@@ -308,12 +308,31 @@ static void sun20i_pwm_reset_ctrl_release(void *data)
 
 static int sun20i_pwm_probe(struct platform_device *pdev)
 {
+	struct pwm_chip *chip;
 	struct sun20i_pwm_chip *sun20i_chip;
+	const struct sun20i_pwm_data *data;
+	u32 npwm;
 	int ret;
 
-	sun20i_chip = devm_kzalloc(&pdev->dev, sizeof(*sun20i_chip), GFP_KERNEL);
-	if (!sun20i_chip)
-		return -ENOMEM;
+	data = of_device_get_match_data(&pdev->dev);
+	if (!data)
+		return -ENODEV;
+
+	ret = of_property_read_u32(pdev->dev.of_node, "allwinner,pwm-channels", &npwm);
+	if (ret)
+		npwm = 8;
+
+	if (npwm > 16) {
+		dev_info(&pdev->dev, "Limiting number of PWM lines from %u to 16", npwm);
+		npwm = 16;
+	}
+
+	chip = devm_pwmchip_alloc(&pdev->dev, npwm, sizeof(*sun20i_chip));
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
+	sun20i_chip = to_sun20i_pwm_chip(chip);
+
+	sun20i_chip->data = data;
 
 	sun20i_chip->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sun20i_chip->base))
@@ -339,17 +358,6 @@ static int sun20i_pwm_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(sun20i_chip->rst),
 				     "failed to get bus reset\n");
 
-	ret = of_property_read_u32(pdev->dev.of_node, "allwinner,pwm-channels",
-				   &sun20i_chip->chip.npwm);
-	if (ret)
-		sun20i_chip->chip.npwm = 8;
-
-	if (sun20i_chip->chip.npwm > 16) {
-		dev_info(&pdev->dev, "Limiting number of PWM lines from %u to 16",
-			 sun20i_chip->chip.npwm);
-		sun20i_chip->chip.npwm = 16;
-	}
-
 	/* Deassert reset */
 	ret = reset_control_deassert(sun20i_chip->rst);
 	if (ret)
@@ -359,17 +367,14 @@ static int sun20i_pwm_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	sun20i_chip->chip.dev = &pdev->dev;
-	sun20i_chip->chip.ops = &sun20i_pwm_ops;
+	chip->ops = &sun20i_pwm_ops;
 
 	mutex_init(&sun20i_chip->mutex);
 
-	ret = devm_pwmchip_add(&pdev->dev, &sun20i_chip->chip);
+	ret = devm_pwmchip_add(&pdev->dev, chip);
 	if (ret < 0)
 		return dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n");
 
-	platform_set_drvdata(pdev, sun20i_chip);
-
 	return 0;
 }
 
-- 
2.45.1