pwm: tegra: Make use of devm_pwmchip_alloc() function

This prepares the pwm-tegra 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/8719be3d57b0b5cf575b312e5ff41fe0717e3a43.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index f61c243..a3d6997 100644 (file)
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -65,8 +65,6 @@ struct tegra_pwm_soc {
 };
 
 struct tegra_pwm_chip {
-       struct pwm_chip chip;
-
        struct clk *clk;
        struct reset_control*rst;
 
@@ -80,7 +78,7 @@ struct tegra_pwm_chip {
 
 static inline struct tegra_pwm_chip *to_tegra_pwm_chip(struct pwm_chip *chip)
 {
-       return container_of(chip, struct tegra_pwm_chip, chip);
+       return pwmchip_get_drvdata(chip);
 }
 
 static inline u32 pwm_readl(struct tegra_pwm_chip *pc, unsigned int offset)
@@ -273,14 +271,17 @@ static int tegra_pwm_probe(struct platform_device *pdev)
 {
        struct pwm_chip *chip;
        struct tegra_pwm_chip *pc;
+       const struct tegra_pwm_soc *soc;
        int ret;
 
-       pc = devm_kzalloc(&pdev->dev, sizeof(*pc), GFP_KERNEL);
-       if (!pc)
-               return -ENOMEM;
-       chip = &pc->chip;
+       soc = of_device_get_match_data(&pdev->dev);
+
+       chip = devm_pwmchip_alloc(&pdev->dev, soc->num_channels, sizeof(*pc));
+       if (IS_ERR(chip))
+               return PTR_ERR(chip);
+       pc = to_tegra_pwm_chip(chip);
 
-       pc->soc = of_device_get_match_data(&pdev->dev);
+       pc->soc = soc;
 
        pc->regs = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(pc->regs))
@@ -328,9 +329,7 @@ static int tegra_pwm_probe(struct platform_device *pdev)
 
        reset_control_deassert(pc->rst);
 
-       chip->dev = &pdev->dev;
        chip->ops = &tegra_pwm_ops;
-       chip->npwm = pc->soc->num_channels;
 
        ret = pwmchip_add(chip);
        if (ret < 0) {