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pwm: stm32: Make use of devm_pwmchip_alloc() function 

This prepares the pwm-stm32 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/59e5dfff2b878cc8590e286572672e4f10e35380.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-02-14 10:32:44 +01:00
parent e315bf700b
commit 174821b7be
1 changed files with 8 additions and 9 deletions
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17
drivers/pwm/pwm-stm32.c
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@ -27,7 +27,6 @@ struct stm32_breakinput {
};
struct stm32_pwm {
struct pwm_chip chip;
struct mutex lock; /* protect pwm config/enable */
struct clk *clk;
struct regmap *regmap;
@ -40,7 +39,7 @@ struct stm32_pwm {
static inline struct stm32_pwm *to_stm32_pwm_dev(struct pwm_chip *chip)
{
return container_of(chip, struct stm32_pwm, chip);
return pwmchip_get_drvdata(chip);
}
static u32 active_channels(struct stm32_pwm *dev)
@ -632,14 +631,16 @@ static int stm32_pwm_probe(struct platform_device *pdev)
struct stm32_timers *ddata = dev_get_drvdata(pdev->dev.parent);
struct pwm_chip *chip;
struct stm32_pwm *priv;
unsigned int num_enabled;
unsigned int npwm, num_enabled;
unsigned int i;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
chip = &priv->chip;
npwm = stm32_pwm_detect_channels(ddata->regmap, &num_enabled);
chip = devm_pwmchip_alloc(dev, npwm, sizeof(*priv));
if (IS_ERR(chip))
return PTR_ERR(chip);
priv = to_stm32_pwm_dev(chip);
mutex_init(&priv->lock);
priv->regmap = ddata->regmap;
@ -655,9 +656,7 @@ static int stm32_pwm_probe(struct platform_device *pdev)
stm32_pwm_detect_complementary(priv);
chip->dev = dev;
chip->ops = &stm32pwm_ops;
chip->npwm = stm32_pwm_detect_channels(ddata->regmap, &num_enabled);
/* Initialize clock refcount to number of enabled PWM channels. */
for (i = 0; i < num_enabled; i++)