[STLinux Kernel] [PATCH v5 7/7] ARM: STiH407: Move over to using the 'reserved-memory' API for obtaining DMA memory
From: peter.griffin@linaro.org (Peter Griffin)
Date: 2016-03-16 16:35:16
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linux-devicetree, lkml
Hi Lee, On Tue, 12 Jan 2016, Lee Jones wrote:
quoted hunk ↗ jump to hunk
Doing so saves quite a bit of code in the driver. For more information on the 'reserved-memory' bindings see: Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt Suggested-by: Suman Anna <redacted> Signed-off-by: Lee Jones <redacted> --- arch/arm/boot/dts/stih407-family.dtsi | 46 +++++++++++++++++++++++++++++------ 1 file changed, 38 insertions(+), 8 deletions(-)diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi index 15c20b6..27b8efc 100644 --- a/arch/arm/boot/dts/stih407-family.dtsi +++ b/arch/arm/boot/dts/stih407-family.dtsi@@ -15,6 +15,36 @@ #address-cells = <1>; #size-cells = <1>; + reserved-memory { + #address-cells = <1>; + #size-cells = <1>; + ranges; + + gp0_reserved: rproc at 40000000 { + compatible = "shared-dma-pool"; + reg = <0x40000000 0x01000000>; + no-map; + }; + + gp1_reserved: rproc at 41000000 { + compatible = "shared-dma-pool"; + reg = <0x41000000 0x01000000>; + no-map; + }; + + audio_reserved: rproc at 42000000 { + compatible = "shared-dma-pool"; + reg = <0x42000000 0x01000000>; + no-map; + }; + + dmu_reserved: rproc at 43000000 { + compatible = "shared-dma-pool"; + reg = <0x43000000 0x01000000>; + no-map; + };
I don't believe these reserved memory ranges are correct for audio_reserved and dmu_reserved. For example my vid_firmware-stih407.elf is linked at 0x41c00000 base address and my audio_firmware-bd-stih407.elf is linked at 0x40c00000. So with all the st231 rproc nodes enabled I guess it would still work. But currently I think st231_gp0 is reserving the memory region for st231_audio, and st231-gp1 is reserving the memory region for st231_dmu. regards, Peter.