pwm: atmel: Make use of devm_pwmchip_alloc() function

This prepares the pwm-atmel 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/f2a83af5660de461b4dcaf76929e9813bddfeff1.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c
index 920bad27fbeedbe1fc69bfeab27394de3489cddc..b2f0abbbad630a3b3240f08a52f4706e5c70b383 100644 (file)
--- a/drivers/pwm/pwm-atmel.c
+++ b/drivers/pwm/pwm-atmel.c
@@ -77,7 +77,6 @@ struct atmel_pwm_data {
 };
 
 struct atmel_pwm_chip {
-       struct pwm_chip chip;
        struct clk *clk;
        void __iomem *base;
        const struct atmel_pwm_data *data;
@@ -99,7 +98,7 @@ struct atmel_pwm_chip {
 
 static inline struct atmel_pwm_chip *to_atmel_pwm_chip(struct pwm_chip *chip)
 {
-       return container_of(chip, struct atmel_pwm_chip, chip);
+       return pwmchip_get_drvdata(chip);
 }
 
 static inline u32 atmel_pwm_readl(struct atmel_pwm_chip *chip,
@@ -502,10 +501,11 @@ static int atmel_pwm_probe(struct platform_device *pdev)
        struct pwm_chip *chip;
        int ret;
 
-       atmel_pwm = devm_kzalloc(&pdev->dev, sizeof(*atmel_pwm), GFP_KERNEL);
-       if (!atmel_pwm)
-               return -ENOMEM;
+       chip = devm_pwmchip_alloc(&pdev->dev, 4, sizeof(*atmel_pwm));
+       if (IS_ERR(chip))
+               return PTR_ERR(chip);
 
+       atmel_pwm = to_atmel_pwm_chip(chip);
        atmel_pwm->data = of_device_get_match_data(&pdev->dev);
 
        atmel_pwm->update_pending = 0;
@@ -520,10 +520,7 @@ static int atmel_pwm_probe(struct platform_device *pdev)
                return dev_err_probe(&pdev->dev, PTR_ERR(atmel_pwm->clk),
                                     "failed to get prepared PWM clock\n");
 
-       chip = &atmel_pwm->chip;
-       chip->dev = &pdev->dev;
        chip->ops = &atmel_pwm_ops;
-       chip->npwm = 4;
 
        ret = atmel_pwm_enable_clk_if_on(chip, true);
        if (ret < 0)