pwm: berlin: Prepare removing pwm_chip from driver data

This prepares the driver for further changes that will drop struct
pwm_chip chip from struct berlin_pwm_chip. Use the pwm_chip as driver
data instead of the berlin_pwm_chip to get access to the pwm_chip in
berlin_pwm_suspend() and berlin_pwm_resume() without using bpc->chip.

Link: https://lore.kernel.org/r/d2a0c5b664ef1bfd4719c645c069717d63fb4e65.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/pwm/pwm-berlin.c b/drivers/pwm/pwm-berlin.c
index 442913232dc01efc756406a2e29d02d9aae16ec9..d910017b5feb32c0478bd513f3de4aebee8945ce 100644 (file)
--- a/drivers/pwm/pwm-berlin.c
+++ b/drivers/pwm/pwm-berlin.c
@@ -198,6 +198,7 @@ MODULE_DEVICE_TABLE(of, berlin_pwm_match);
 
 static int berlin_pwm_probe(struct platform_device *pdev)
 {
+       struct pwm_chip *chip;
        struct berlin_pwm_chip *bpc;
        int ret;
 
@@ -213,25 +214,27 @@ static int berlin_pwm_probe(struct platform_device *pdev)
        if (IS_ERR(bpc->clk))
                return PTR_ERR(bpc->clk);
 
-       bpc->chip.dev = &pdev->dev;
-       bpc->chip.ops = &berlin_pwm_ops;
-       bpc->chip.npwm = BERLIN_PWM_NUMPWMS;
+       chip = &bpc->chip;
+       chip->dev = &pdev->dev;
+       chip->ops = &berlin_pwm_ops;
+       chip->npwm = BERLIN_PWM_NUMPWMS;
 
-       ret = devm_pwmchip_add(&pdev->dev, &bpc->chip);
+       ret = devm_pwmchip_add(&pdev->dev, chip);
        if (ret < 0)
                return dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n");
 
-       platform_set_drvdata(pdev, bpc);
+       platform_set_drvdata(pdev, chip);
 
        return 0;
 }
 
 static int berlin_pwm_suspend(struct device *dev)
 {
-       struct berlin_pwm_chip *bpc = dev_get_drvdata(dev);
+       struct pwm_chip *chip = dev_get_drvdata(dev);
+       struct berlin_pwm_chip *bpc = to_berlin_pwm_chip(chip);
        unsigned int i;
 
-       for (i = 0; i < bpc->chip.npwm; i++) {
+       for (i = 0; i < chip->npwm; i++) {
                struct berlin_pwm_channel *channel = &bpc->channel[i];
 
                channel->enable = berlin_pwm_readl(bpc, i, BERLIN_PWM_ENABLE);
@@ -247,7 +250,8 @@ static int berlin_pwm_suspend(struct device *dev)
 
 static int berlin_pwm_resume(struct device *dev)
 {
-       struct berlin_pwm_chip *bpc = dev_get_drvdata(dev);
+       struct pwm_chip *chip = dev_get_drvdata(dev);
+       struct berlin_pwm_chip *bpc = to_berlin_pwm_chip(chip);
        unsigned int i;
        int ret;
 
@@ -255,7 +259,7 @@ static int berlin_pwm_resume(struct device *dev)
        if (ret)
                return ret;
 
-       for (i = 0; i < bpc->chip.npwm; i++) {
+       for (i = 0; i < chip->npwm; i++) {
                struct berlin_pwm_channel *channel = &bpc->channel[i];
 
                berlin_pwm_writel(bpc, i, channel->ctrl, BERLIN_PWM_CONTROL);