1 files changed, 22 insertions, 9 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index f2bc0b7d9b93..6474bd2a6d07 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -28,9 +28,11 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
 {
 	int ret;
 
-	ret = regulator_enable(tdev->vdd);
-	if (ret)
-		goto err_power;
+	if (tdev->vdd) {
+		ret = regulator_enable(tdev->vdd);
+		if (ret)
+			goto err_power;
+	}
 
 	ret = clk_prepare_enable(tdev->clk);
 	if (ret)
@@ -67,7 +69,8 @@ err_clk_pwr:
 err_clk_ref:
 	clk_disable_unprepare(tdev->clk);
 err_clk:
-	regulator_disable(tdev->vdd);
+	if (tdev->vdd)
+		regulator_disable(tdev->vdd);
 err_power:
 	return ret;
 }
@@ -75,6 +78,8 @@ err_power:
 static int
 nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
 {
+	int ret;
+
 	reset_control_assert(tdev->rst);
 	udelay(10);
 
@@ -84,7 +89,13 @@ nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
 	clk_disable_unprepare(tdev->clk);
 	udelay(10);
 
-	return regulator_disable(tdev->vdd);
+	if (tdev->vdd) {
+		ret = regulator_disable(tdev->vdd);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
 }
 
 static void
@@ -264,10 +275,12 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
 	tdev->func = func;
 	tdev->pdev = pdev;
 
-	tdev->vdd = devm_regulator_get(&pdev->dev, "vdd");
-	if (IS_ERR(tdev->vdd)) {
-		ret = PTR_ERR(tdev->vdd);
-		goto free;
+	if (func->require_vdd) {
+		tdev->vdd = devm_regulator_get(&pdev->dev, "vdd");
+		if (IS_ERR(tdev->vdd)) {
+			ret = PTR_ERR(tdev->vdd);
+			goto free;
+		}
 	}
 
 	tdev->rst = devm_reset_control_get(&pdev->dev, "gpu");