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| author | Lucas Stach <l.stach@pengutronix.de> | 2018-01-19 15:05:40 +0100 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2018-03-09 12:22:35 +0100 |
| commit | 65f037e8e9085b9d6d76e5894c1e5353602202be (patch) | |
| tree | 3e3149268950681f6c5b691937819edfc0d380b1 /drivers/gpu/drm/etnaviv/etnaviv_gpu.c | |
| parent | drm/etnaviv: split out and optimize MMU fault dumping (diff) | |
| download | linux-65f037e8e9085b9d6d76e5894c1e5353602202be.tar.xz linux-65f037e8e9085b9d6d76e5894c1e5353602202be.zip | |
drm/etnaviv: add support for slave interface clock
The slave interface clock is a clock input found on newer cores to gate
the register interface. For now we simply ungate it when the GPU is in
active state.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index ee2486159ea7..260a73a44e69 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -1383,6 +1383,12 @@ static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu) { int ret; + if (gpu->clk_reg) { + ret = clk_prepare_enable(gpu->clk_reg); + if (ret) + return ret; + } + if (gpu->clk_bus) { ret = clk_prepare_enable(gpu->clk_bus); if (ret) @@ -1421,6 +1427,8 @@ static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu) clk_disable_unprepare(gpu->clk_core); if (gpu->clk_bus) clk_disable_unprepare(gpu->clk_bus); + if (gpu->clk_reg) + clk_disable_unprepare(gpu->clk_reg); return 0; } @@ -1676,6 +1684,11 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev) } /* Get Clocks: */ + gpu->clk_reg = devm_clk_get(&pdev->dev, "reg"); + DBG("clk_reg: %p", gpu->clk_reg); + if (IS_ERR(gpu->clk_reg)) + gpu->clk_reg = NULL; + gpu->clk_bus = devm_clk_get(&pdev->dev, "bus"); DBG("clk_bus: %p", gpu->clk_bus); if (IS_ERR(gpu->clk_bus)) |