add pll_g reference clock

2 files changed, 17 insertions, 0 deletions

diff --git a/drm/nouveau/include/nvkm/core/tegra.h b/drm/nouveau/include/nvkm/core/tegra.h
index 16641cec1..450deb2ed 100644
--- a/drm/nouveau/include/nvkm/core/tegra.h
+++ b/drm/nouveau/include/nvkm/core/tegra.h
@@ -11,6 +11,7 @@ struct nvkm_device_tegra {
 
 	struct reset_control *rst;
 	struct clk *clk;
+	struct clk *clk_ref;
 	struct clk *clk_pwr;
 
 	struct regulator *vdd;
diff --git a/drm/nouveau/nvkm/engine/device/tegra.c b/drm/nouveau/nvkm/engine/device/tegra.c
index 7f8a42721..6e6c8d3c1 100644
--- a/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drm/nouveau/nvkm/engine/device/tegra.c
@@ -35,6 +35,11 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
 	ret = clk_prepare_enable(tdev->clk);
 	if (ret)
 		goto err_clk;
+	if (tdev->clk_ref) {
+		ret = clk_prepare_enable(tdev->clk_ref);
+		if (ret)
+			goto err_clk_ref;
+	}
 	ret = clk_prepare_enable(tdev->clk_pwr);
 	if (ret)
 		goto err_clk_pwr;
@@ -57,6 +62,9 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
 err_clamp:
 	clk_disable_unprepare(tdev->clk_pwr);
 err_clk_pwr:
+	if (tdev->clk_ref)
+		clk_disable_unprepare(tdev->clk_ref);
+err_clk_ref:
 	clk_disable_unprepare(tdev->clk);
 err_clk:
 	regulator_disable(tdev->vdd);
@@ -71,6 +79,8 @@ nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
 	udelay(10);
 
 	clk_disable_unprepare(tdev->clk_pwr);
+	if (tdev->clk_ref)
+		clk_disable_unprepare(tdev->clk_ref);
 	clk_disable_unprepare(tdev->clk);
 	udelay(10);
 
@@ -269,6 +279,12 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
 	if (IS_ERR(tdev->clk))
 		return PTR_ERR(tdev->clk);
 
+	tdev->clk_ref = devm_clk_get(&pdev->dev, "pllg_ref");
+	if (IS_ERR(tdev->clk_ref)) {
+		dev_dbg(&pdev->dev, "failed to get pllg_ref clock: %ld\n",
+			PTR_ERR(tdev->clk_ref));
+		tdev->clk_ref = NULL;
+	}
 	tdev->clk_pwr = devm_clk_get(&pdev->dev, "pwr");
 	if (IS_ERR(tdev->clk_pwr))
 		return PTR_ERR(tdev->clk_pwr);