@@ -15,7 +15,6 @@
#include <linux/slab.h>
struct lpc32xx_pwm_chip {
- struct pwm_chip chip;
struct clk *clk;
void __iomem *base;
};
@@ -23,8 +22,10 @@ struct lpc32xx_pwm_chip {
#define PWM_ENABLE BIT(31)
#define PWM_PIN_LEVEL BIT(30)
-#define to_lpc32xx_pwm_chip(_chip) \
- container_of(_chip, struct lpc32xx_pwm_chip, chip)
+static inline struct lpc32xx_pwm_chip *to_lpc32xx_pwm_chip(struct pwm_chip *chip)
+{
+ return pwmchip_get_drvdata(chip);
+}
static int lpc32xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
int duty_ns, int period_ns)
@@ -119,13 +120,15 @@ static const struct pwm_ops lpc32xx_pwm_ops = {
static int lpc32xx_pwm_probe(struct platform_device *pdev)
{
+ struct pwm_chip *chip;
struct lpc32xx_pwm_chip *lpc32xx;
int ret;
u32 val;
- lpc32xx = devm_kzalloc(&pdev->dev, sizeof(*lpc32xx), GFP_KERNEL);
- if (!lpc32xx)
- return -ENOMEM;
+ chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*lpc32xx));
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+ lpc32xx = to_lpc32xx_pwm_chip(chip);
lpc32xx->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(lpc32xx->base))
@@ -135,16 +138,14 @@ static int lpc32xx_pwm_probe(struct platform_device *pdev)
if (IS_ERR(lpc32xx->clk))
return PTR_ERR(lpc32xx->clk);
- lpc32xx->chip.dev = &pdev->dev;
- lpc32xx->chip.ops = &lpc32xx_pwm_ops;
- lpc32xx->chip.npwm = 1;
+ chip->ops = &lpc32xx_pwm_ops;
/* If PWM is disabled, configure the output to the default value */
val = readl(lpc32xx->base);
val &= ~PWM_PIN_LEVEL;
writel(val, lpc32xx->base);
- ret = devm_pwmchip_add(&pdev->dev, &lpc32xx->chip);
+ ret = devm_pwmchip_add(&pdev->dev, chip);
if (ret < 0) {
dev_err(&pdev->dev, "failed to add PWM chip, error %d\n", ret);
return ret;
This prepares the pwm-lpc32xx 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@pengutronix.de> --- drivers/pwm/pwm-lpc32xx.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-)