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| author | Alexandre Courbot <acourbot@nvidia.com> | 2017-03-29 18:31:21 +0900 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2017-04-06 14:39:04 +1000 |
| commit | e6e1817a55ba50e0d68ce77e6008edcba97ba41a (patch) | |
| tree | 1d5db40b092b3c224f0a6eaa3d0cb97cf5b7deb3 /drivers/gpu/drm/nouveau/nvkm/engine | |
| parent | 51751f7db0c9f457318fba2004ca8fe2bb2c0b7e (diff) | |
| download | linux-stable-e6e1817a55ba50e0d68ce77e6008edcba97ba41a.tar.gz linux-stable-e6e1817a55ba50e0d68ce77e6008edcba97ba41a.tar.bz2 linux-stable-e6e1817a55ba50e0d68ce77e6008edcba97ba41a.zip | |
drm/nouveau/platform: make VDD regulator optional
GP10B's power is managed by generic PM domains, so it does not require a
VDD regulator. Add this option into the chip function structure.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/engine')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 31 |
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"); |