[PATCH 07/17] drm/imx: tve: add regulator_disable devm_action

[Marco Felsch]

To avoid a dedicated unbind() callback we can use the new devm_action
mechanism. This allows us to drop the error check because the callback
will only be executed if the regulator was registered.

Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
 drivers/gpu/drm/imx/imx-tve.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index e113014a1a79..3340ba6e0222 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -485,6 +485,13 @@ static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
 	return 0;
 }
 
+static void imx_tve_disable_regulator(void *data)
+{
+	struct imx_tve *tve = data;
+
+	regulator_disable(tve->dac_reg);
+}
+
 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 {
 	return (reg % 4 == 0) && (reg <= 0xdc);
@@ -609,6 +616,9 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 		ret = regulator_enable(tve->dac_reg);
 		if (ret)
 			return ret;
+		ret = devm_add_action_or_reset(dev, imx_tve_disable_regulator, tve);
+		if (ret)
+			return ret;
 	}
 
 	tve->clk = devm_clk_get(dev, "tve");
@@ -655,18 +665,8 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 	return 0;
 }
 
-static void imx_tve_unbind(struct device *dev, struct device *master,
-	void *data)
-{
-	struct imx_tve *tve = dev_get_drvdata(dev);
-
-	if (!IS_ERR(tve->dac_reg))
-		regulator_disable(tve->dac_reg);
-}
-
 static const struct component_ops imx_tve_ops = {
 	.bind	= imx_tve_bind,
-	.unbind	= imx_tve_unbind,
 };
 
 static int imx_tve_probe(struct platform_device *pdev)
-- 
2.20.1