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path: root/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 9afa5f3e3c1c..ec12efb4689a 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/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);
@@ -274,6 +284,13 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
goto free;
}
+ if (func->require_ref_clk)
+ tdev->clk_ref = devm_clk_get(&pdev->dev, "ref");
+ if (IS_ERR(tdev->clk_ref)) {
+ ret = PTR_ERR(tdev->clk_ref);
+ goto free;
+ }
+
tdev->clk_pwr = devm_clk_get(&pdev->dev, "pwr");
if (IS_ERR(tdev->clk_pwr)) {
ret = PTR_ERR(tdev->clk_pwr);