lkml.org 
[lkml]   [2015]   [Aug]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v6 6/8] arm64: dts: add SRAM, MHU mailbox and SCPI support on Juno


On 03/08/15 12:23, Liviu Dudau wrote:
> On Fri, Jul 31, 2015 at 06:43:09PM +0100, Sudeep Holla wrote:
>> This patch adds support for the MHU mailbox peripheral used on Juno by
>> application processors to communicate with remote SCP handling most of
>> the CPU/system power management. It also adds the SRAM reserving the
>> shared memory and SCPI message protocol using that shared memory.
>>
>> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
>> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
>> Cc: Jon Medhurst (Tixy) <tixy@linaro.org>
>> ---
>> arch/arm64/boot/dts/arm/juno-base.dtsi | 54 ++++++++++++++++++++++++++++++++++
>> 1 file changed, 54 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi
>> index e3ee96036eca..c624208edef6 100644
>> --- a/arch/arm64/boot/dts/arm/juno-base.dtsi
>> +++ b/arch/arm64/boot/dts/arm/juno-base.dtsi
>> @@ -17,6 +17,18 @@
>> };
>> };
>>
>> + mailbox: mhu@2b1f0000 {
>> + compatible = "arm,mhu", "arm,primecell";
>> + reg = <0x0 0x2b1f0000 0x0 0x1000>;
>> + interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
>> + <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
>> + interrupt-names = "mhu_lpri_rx",
>> + "mhu_hpri_rx";
>> + #mbox-cells = <1>;
>> + clocks = <&soc_refclk100mhz>;
>> + clock-names = "apb_pclk";
>> + };
>> +
>> gic: interrupt-controller@2c010000 {
>> compatible = "arm,gic-400", "arm,cortex-a15-gic";
>> reg = <0x0 0x2c010000 0 0x1000>,
>> @@ -44,6 +56,48 @@
>> <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_LOW)>;
>> };
>>
>> + sram: sram@2e000000 {
>> + compatible = "arm,juno-sram-ns", "mmio-sram";
>> + reg = <0x0 0x2e000000 0x0 0x8000>;
>> +
>> + #address-cells = <1>;
>> + #size-cells = <1>;
>> + ranges = <0 0x0 0x2e000000 0x8000>;
>> +
>> + cpu_scp_lpri: scp-shmem@0 {
>> + compatible = "arm,juno-scp-shmem";
>> + reg = <0x0 0x200>;
>> + };
>> +
>> + cpu_scp_hpri: scp-shmem@200 {
>> + compatible = "arm,juno-scp-shmem";
>> + reg = <0x200 0x200>;
>> + };
>> + };
>> +
>> + scpi {
>> + compatible = "arm,scpi";
>> + mboxes = <&mailbox 1>;
>> + shmem = <&cpu_scp_hpri>;
>> +
>> + clocks {
>> + compatible = "arm,scpi-clocks";
>> +
>> + scpi_dvfs: scpi_clocks@0 {
>> + compatible = "arm,scpi-dvfs-clocks";
>> + #clock-cells = <1>;
>> + clock-indices = <0>, <1>, <2>;
>> + clock-output-names = "atlclk", "aplclk","gpuclk";
>> + };
>> + scpi_clk: scpi_clocks@3 {
>> + compatible = "arm,scpi-variable-clocks";
>> + #clock-cells = <1>;
>> + clock-indices = <3>, <4>;
>> + clock-output-names = "pxlclk0", "pxlclk1";
>> + };
>> + };
>> + };
>> +
>
> Sorry for noticing this after the ACK, is there any reason why the scpi node is not inside
> the juno-clocks.dtsi file?
>

Yes, scpi node will have other nodes like sensors/hwmon. So the whole
scpi node can't sit in juno-clocks. Ideally the clocks belongs to
juno-clocks, but I got troubles with the way the DTSI are includes and
could not keep scpi node in base and just update clocks in
juno-clocks.dtsi. It needs some rework the way include file are used.
It's in my todo and I will look at that when I get time.

Regards,
Sudeep


\
 
 \ /
  Last update: 2015-08-03 14:01    [W:2.317 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site