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| author |   Clément Péron <peron.clem@gmail.com> | 2019-05-21 18:10:57 +0200 |
|---|---|---|
| committer |   Rob Herring <robh@kernel.org> | 2019-05-22 14:23:29 -0500 |
| commit | b681af0bc1cc520c35f2ef109aa6a2db46d0ecb5 (patch) | |
| tree | 72f497e97b2d75e37195573f13732493b6c73542 | |
| parent | dt-bindings: gpu: add bus clock for Mali Midgard GPUs (diff) | |
| download | linux-dev-b681af0bc1cc520c35f2ef109aa6a2db46d0ecb5.tar.xz linux-dev-b681af0bc1cc520c35f2ef109aa6a2db46d0ecb5.zip | |
drm: panfrost: add optional bus_clock
Allwinner H6 has an ARM Mali-T720 MP2 which required a bus_clock.
Add an optional bus_clock at the init of the panfrost driver.
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190521161102.29620-2-peron.clem@gmail.com
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.c | 22 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_device.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index 970f669c6d29..e6b3171c7179 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -55,11 +55,33 @@ static int panfrost_clk_init(struct panfrost_device *pfdev) if (err) return err; + pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus"); + if (IS_ERR(pfdev->bus_clock)) { + dev_err(pfdev->dev, "get bus_clock failed %ld\n", + PTR_ERR(pfdev->bus_clock)); + return PTR_ERR(pfdev->bus_clock); + } + + if (pfdev->bus_clock) { + rate = clk_get_rate(pfdev->bus_clock); + dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate); + + err = clk_prepare_enable(pfdev->bus_clock); + if (err) + goto disable_clock; + } + return 0; + +disable_clock: + clk_disable_unprepare(pfdev->clock); + + return err; } static void panfrost_clk_fini(struct panfrost_device *pfdev) { + clk_disable_unprepare(pfdev->bus_clock); clk_disable_unprepare(pfdev->clock); } diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index 56f452dfb490..8074f221034b 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -66,6 +66,7 @@ struct panfrost_device { void __iomem *iomem; struct clk *clock; + struct clk *bus_clock; struct regulator *regulator; struct reset_control *rstc; |