linux-kernel - Re: [PATCH 0/5] Use mmio-sram driver for Keystone MSMC RAM

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Date:   Fri, 6 Jan 2017 13:10:41 -0600
From:   Suman Anna <s-anna@...com>
To:     "santosh.shilimkar@...cle.com" <santosh.shilimkar@...cle.com>
CC:     Santosh Shilimkar <ssantosh@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Tero Kristo <t-kristo@...com>,
        Murali Karicheri <m-karicheri2@...com>,
        Vitaly Andrianov <vitalya@...com>
Subject: Re: [PATCH 0/5] Use mmio-sram driver for Keystone MSMC RAM

Hi Santosh,

> 
> On 9/7/16 9:25 AM, Santosh Shilimkar wrote:
>> On 9/7/2016 9:22 AM, Suman Anna wrote:
>>> Hi Santosh,
>>>
>>> On 09/07/2016 11:11 AM, Santosh Shilimkar wrote:
>>>> Hi Suman,
>>>>
>>>> On 9/1/2016 3:58 PM, Suman Anna wrote:
>>>>> Hi,
>>>>>
>>>>> The Keystone 2 family of SoCs have an on-chip RAM called the
>>>>> Multicore Shared Memory (MSM) RAM. This RAM is accessible through
>>>>> the Multicore Shared Memory Controller (MSMC). This series represents
>>>>> these on-chip RAMs as sram nodes so that the memory allocations
>>>>> can be managed by the in-kernel mmio-sram driver.
>>>>>
>>>>> The first 4 patches adds the basic SRAM nodes on each of the SoCs,
>>>>> and the last patch enables the generic on-chip SRAM driver for
>>>>> keystone defconfig.
>>>>>
>>>> The series looks good in general but I would like to understand
>>>> the users of this memory in kernel. Is that going to be posted
>>>> as a follow up patch ? Is the Power controller going to make
>>>> use of this SRAM for PM code ?
>>>
>>> Yes, the users will eventually follow. Power Controller code is not
>>> gonna be using this SRAM, it has its own RAM. This memory is gonna be
>>> split between various functional features like IPC, OPTEE integration,
>>> we already have the Boot Monitor code using this. We will have the
>>> memory split by either having static child nodes or drivers requesting
>>> the memory using gen_pool API.
>>>
>> OK. Its good to add the code at least with one active user of it.
>> Since this has to anyway wait for another merge window, please post the
>> users of it so that I can pull the combined patchset.
>>
> Are you going to post new patchset or you dropped this series ?
> 
> If you want me to include it for next merge window, please post
> refreshed patchset.

No, haven't dropped the series, will post it today. You prefer the
series on -rc1 or -rc2, not that it makes a difference.

regards
Suman