pwm: intel-lgm: Make use of devm_pwmchip_alloc() function

This prepares the pwm-intel-lgm 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/3b2be81b046fe2213736ad37153131d5f4c859f5.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-intel-lgm.c b/drivers/pwm/pwm-intel-lgm.c
index 54ecae7f937ed0517e58a0c09615240c6fe71e0a..f9cc7c17c8f0385bfce6cfcced2039a2f42779d3 100644 (file)
--- a/drivers/pwm/pwm-intel-lgm.c
+++ b/drivers/pwm/pwm-intel-lgm.c
@@ -42,14 +42,13 @@
 #define LGM_PWM_PERIOD_2WIRE_NS                (40 * NSEC_PER_MSEC)
 
 struct lgm_pwm_chip {
-       struct pwm_chip chip;
        struct regmap *regmap;
        u32 period;
 };
 
 static inline struct lgm_pwm_chip *to_lgm_pwm_chip(struct pwm_chip *chip)
 {
-       return container_of(chip, struct lgm_pwm_chip, chip);
+       return pwmchip_get_drvdata(chip);
 }
 
 static int lgm_pwm_enable(struct pwm_chip *chip, bool enable)
@@ -168,14 +167,16 @@ static int lgm_pwm_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
        struct reset_control *rst;
+       struct pwm_chip *chip;
        struct lgm_pwm_chip *pc;
        void __iomem *io_base;
        struct clk *clk;
        int ret;
 
-       pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
-       if (!pc)
-               return -ENOMEM;
+       chip = devm_pwmchip_alloc(dev, 1, sizeof(*pc));
+       if (IS_ERR(chip))
+               return PTR_ERR(chip);
+       pc = to_lgm_pwm_chip(chip);
 
        io_base = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(io_base))
@@ -203,13 +204,11 @@ static int lgm_pwm_probe(struct platform_device *pdev)
        if (ret)
                return dev_err_probe(dev, ret, "cannot deassert reset control\n");
 
-       pc->chip.dev = dev;
-       pc->chip.ops = &lgm_pwm_ops;
-       pc->chip.npwm = 1;
+       chip->ops = &lgm_pwm_ops;
 
        lgm_pwm_init(pc);
 
-       ret = devm_pwmchip_add(dev, &pc->chip);
+       ret = devm_pwmchip_add(dev, chip);
        if (ret < 0)
                return dev_err_probe(dev, ret, "failed to add PWM chip\n");