[PATCH 10/18] pwm: jz4740: Make use of devm_pwmchip_alloc() function

[Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>]

This prepares the pwm-jz4740 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.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
 drivers/pwm/pwm-jz4740.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c
index 8b01819df67d..de3b891f1ceb 100644
--- a/drivers/pwm/pwm-jz4740.c
+++ b/drivers/pwm/pwm-jz4740.c
@@ -25,23 +25,22 @@ struct soc_info {
 };
 
 struct jz4740_pwm_chip {
-	struct pwm_chip chip;
 	struct regmap *map;
 	struct clk *clk[];
 };
 
 static inline struct jz4740_pwm_chip *to_jz4740(struct pwm_chip *chip)
 {
-	return container_of(chip, struct jz4740_pwm_chip, chip);
+	return pwmchip_priv(chip);
 }
 
-static bool jz4740_pwm_can_use_chn(struct jz4740_pwm_chip *jz,
+static bool jz4740_pwm_can_use_chn(struct pwm_chip *chip,
 				   unsigned int channel)
 {
 	/* Enable all TCU channels for PWM use by default except channels 0/1 */
-	u32 pwm_channels_mask = GENMASK(jz->chip.npwm - 1, 2);
+	u32 pwm_channels_mask = GENMASK(chip->npwm - 1, 2);
 
-	device_property_read_u32(jz->chip.dev->parent,
+	device_property_read_u32(chip->dev->parent,
 				 "ingenic,pwm-channels-mask",
 				 &pwm_channels_mask);
 
@@ -55,7 +54,7 @@ static int jz4740_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)
 	char name[16];
 	int err;
 
-	if (!jz4740_pwm_can_use_chn(jz, pwm->hwpwm))
+	if (!jz4740_pwm_can_use_chn(chip, pwm->hwpwm))
 		return -EBUSY;
 
 	snprintf(name, sizeof(name), "timer%u", pwm->hwpwm);
@@ -224,6 +223,7 @@ static const struct pwm_ops jz4740_pwm_ops = {
 static int jz4740_pwm_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
+	struct pwm_chip *chip;
 	struct jz4740_pwm_chip *jz4740;
 	const struct soc_info *info;
 
@@ -231,10 +231,10 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
 	if (!info)
 		return -EINVAL;
 
-	jz4740 = devm_kzalloc(dev, struct_size(jz4740, clk, info->num_pwms),
-			      GFP_KERNEL);
-	if (!jz4740)
+	chip = devm_pwmchip_alloc(dev, struct_size(jz4740, clk, info->num_pwms));
+	if (!chip)
 		return -ENOMEM;
+	jz4740 = to_jz4740(chip);
 
 	jz4740->map = device_node_to_regmap(dev->parent->of_node);
 	if (IS_ERR(jz4740->map)) {
@@ -242,11 +242,10 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
 		return PTR_ERR(jz4740->map);
 	}
 
-	jz4740->chip.dev = dev;
-	jz4740->chip.ops = &jz4740_pwm_ops;
-	jz4740->chip.npwm = info->num_pwms;
+	chip->ops = &jz4740_pwm_ops;
+	chip->npwm = info->num_pwms;
 
-	return devm_pwmchip_add(dev, &jz4740->chip);
+	return devm_pwmchip_add(dev, chip);
 }
 
 static const struct soc_info jz4740_soc_info = {
-- 
2.39.2