pwm: sifive: Make use of devm_pwmchip_alloc() function

This prepares the pwm-sifive 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/30a4cacafe2c323f2531dd1c1126f0bf0fe5e03c.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c
index 6abe91d..ed7957c 100644 (file)
--- a/drivers/pwm/pwm-sifive.c
+++ b/drivers/pwm/pwm-sifive.c
@@ -41,7 +41,6 @@
 #define PWM_SIFIVE_DEFAULT_PERIOD      10000000
 
 struct pwm_sifive_ddata {
-       struct pwm_chip chip;
        struct device *parent;
        struct mutex lock; /* lock to protect user_count and approx_period */
        struct notifier_block notifier;
@@ -55,7 +54,7 @@ struct pwm_sifive_ddata {
 static inline
 struct pwm_sifive_ddata *pwm_sifive_chip_to_ddata(struct pwm_chip *chip)
 {
-       return container_of(chip, struct pwm_sifive_ddata, chip);
+       return pwmchip_get_drvdata(chip);
 }
 
 static int pwm_sifive_request(struct pwm_chip *chip, struct pwm_device *pwm)
@@ -231,15 +230,14 @@ static int pwm_sifive_probe(struct platform_device *pdev)
        u32 val;
        unsigned int enabled_pwms = 0, enabled_clks = 1;
 
-       ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL);
-       if (!ddata)
-               return -ENOMEM;
+       chip = devm_pwmchip_alloc(dev, 4, sizeof(*ddata));
+       if (IS_ERR(chip))
+               return PTR_ERR(chip);
 
+       ddata = pwm_sifive_chip_to_ddata(chip);
+       ddata->parent = dev;
        mutex_init(&ddata->lock);
-       chip = &ddata->chip;
-       chip->dev = ddata->parent = dev;
        chip->ops = &pwm_sifive_ops;
-       chip->npwm = 4;
 
        ddata->regs = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(ddata->regs))