diff options
| author | Jason Liu <jason.hui.liu@nxp.com> | 2016-03-14 16:40:12 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:24:31 +0800 |
| commit | 87405e105ab449eaa907c40c4678b8628b82fc3b (patch) | |
| tree | 0d6c0316e8890313c585dfd4e825128b16b286a9 /arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts | |
| parent | 4ce06c5961f8fc4e7394c60aa36cac13b6de1896 (diff) | |
MLK-12556 dts: i.mx6ul: configure the CMA region by default
CMA region is a must to avoid the multile memory mapping
for the DMAed memory and also benifit the large continious
phisical memory allocation.
The default value is depend on the target system design and
user cases definition. This is not suitable to put this into
the soc.dtsi, thus we put it into the board DTS.
customer can override the value by changing cma size in DTS file.
Again, customer need set the CMA size correctly according to the
target system. The incorrectly CMA size can cause Linux kernel fail
to boot up.CMA disabled or CMA size set to zero is also not allowed.
Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>
Diffstat (limited to 'arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts')
| -rw-r--r-- | arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts b/arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts index 8180666c15d7..0692bf45609e 100644 --- a/arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts +++ b/arch/arm/boot/dts/imx6ul-14x14-lpddr2-arm2.dts @@ -23,6 +23,19 @@ reg = <0x80000000 0x20000000>; }; + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + linux,cma { + compatible = "shared-dma-pool"; + reusable; + size = <0x14000000>; + linux,cma-default; + }; + }; + pxp_v4l2 { compatible = "fsl,imx6ul-pxp-v4l2", "fsl,imx6sx-pxp-v4l2", "fsl,imx6sl-pxp-v4l2"; status = "okay"; |