On Wed, Aug 19, 2015 at 10:37:35AM +0100, Leo Yan wrote:
> On Hi6220, below memory regions in DDR have specific purpose:
>
> 0x05e0,0000 - 0x05ef,ffff: For MCU firmware using at runtime;
> 0x0740,f000 - 0x0740,ffff: For MCU firmware's section;
> 0x06df,f000 - 0x06df,ffff: For mailbox message data.
>
> This patch reserves these memory regions and add device node for
> mailbox in dts.
>
> Signed-off-by: Leo Yan <leo....@linaro.org>
> ---
> arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 20 +++++++++++++++++---
> arch/arm64/boot/dts/hisilicon/hi6220.dtsi | 8 ++++++++
> 2 files changed, 25 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> index e36a539..d5470d3 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> @@ -7,9 +7,6 @@
>
> /dts-v1/;
>
> -/*Reserved 1MB memory for MCU*/
> -/memreserve/ 0x05e00000 0x00100000;
> -
> #include "hi6220.dtsi"
>
> / {
> @@ -28,4 +25,21 @@
> device_type = "memory";
> reg = <0x0 0x0 0x0 0x40000000>;
> };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + mcu-buf@05e00000 {
> + no-map;
> + reg = <0x0 0x05e00000 0x0 0x00100000>, /* MCU firmware
> buffer */
> + <0x0 0x0740f000 0x0 0x00001000>; /* MCU firmware
> section */
> + };
> +
> + mbox-buf@06dff000 {
> + no-map;
> + reg = <0x0 0x06dff000 0x0 0x00001000>; /* Mailbox
> message buf */
> + };
> + };
As far as I can see, it would be simpler to simply carve these out of the
memory node.
I don't see why you need reserved-memory here, given you're not referring to
these regions by phandle anyway.
Thanks,
Mark.
> };
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> index 3f03380..9ff25bc 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
> @@ -167,5 +167,13 @@
> clocks = <&ao_ctrl 36>, <&ao_ctrl 36>;
> clock-names = "uartclk", "apb_pclk";
> };
> +
> + mailbox: mailbox@f7510000 {
> + #mbox-cells = <1>;
> + compatible = "hisilicon,hi6220-mbox";
> + reg = <0x0 0xf7510000 0x0 0x1000>, /* IPC_S */
> + <0x0 0x06dff800 0x0 0x0800>; /* Mailbox buffer */
> + interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
> + };
> };
> };
> --
> 1.9.1
>
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