[PATCH] pwm: rockchip: Simplify using devm_pwmchip_add()

With devm_pwmchip_add() we can drop pwmchip_remove() from the device
remove callback. The latter can then go away, too and as this is the
only user of platform_get_drvdata(), the respective call to
platform_set_drvdata() can go, too.

Signed-off-by: zhaoxiao <redacted>
---
 drivers/pwm/pwm-rockchip.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index cbe900877724..c22856916e63 100644
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c

@@ -347,8 +347,6 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
                goto err_clk;
        }

-       platform_set_drvdata(pdev, pc);
-
        pc->data = id->data;
        pc->chip.dev = &pdev->dev;
        pc->chip.ops = &rockchip_pwm_ops;

@@ -358,7 +356,7 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
        ctrl = readl_relaxed(pc->base + pc->data->regs.ctrl);
        enabled = (ctrl & enable_conf) == enable_conf;

-       ret = pwmchip_add(&pc->chip);
+       ret = devm_pwmchip_add(&pdev->dev, &pc->chip);
        if (ret < 0) {
                dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
                goto err_pclk;

@@ -380,37 +378,12 @@ static int rockchip_pwm_probe(struct platform_device *pdev)
        return ret;
 }

-static int rockchip_pwm_remove(struct platform_device *pdev)
-{
-       struct rockchip_pwm_chip *pc = platform_get_drvdata(pdev);
-
-       /*
-        * Disable the PWM clk before unpreparing it if the PWM device is still
-        * running. This should only happen when the last PWM user left it
-        * enabled, or when nobody requested a PWM that was previously enabled
-        * by the bootloader.
-        *
-        * FIXME: Maybe the core should disable all PWM devices in
-        * pwmchip_remove(). In this case we'd only have to call
-        * clk_unprepare() after pwmchip_remove().
-        *
-        */
-       if (pwm_is_enabled(pc->chip.pwms))
-               clk_disable(pc->clk);
-
-       clk_unprepare(pc->pclk);
-       clk_unprepare(pc->clk);