lkml.org 
[lkml]   [2017]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] nvmem: sunxi-sid: add support for A64/H5's SID controller
From
Date


On 19/09/17 09:20, Maxime Ripard wrote:
> On Mon, Sep 18, 2017 at 11:42:04PM +0800, Icenowy Zheng wrote:
>> Allwinner A64/H5 SoCs come with a SID controller like the one in H3, but
>> without the silicon bug that makes the initial value at 0x200 wrong, so
>> the value at 0x200 can be directly read.
>>
>> Add support for this kind of SID controller.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> ---
>> Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt | 1 +
>> drivers/nvmem/sunxi_sid.c | 6 ++++++
>> 2 files changed, 7 insertions(+)


TBH, I don't fully understand the soc specifics here, but if you want me
to queue this patch, I would need an ack from Maxime.


thanks,
srini



>>
>> diff --git a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
>> index ef06d061913c..6ea0836939ee 100644
>> --- a/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
>> +++ b/Documentation/devicetree/bindings/nvmem/allwinner,sunxi-sid.txt
>> @@ -5,6 +5,7 @@ Required properties:
>> "allwinner,sun4i-a10-sid"
>> "allwinner,sun7i-a20-sid"
>> "allwinner,sun8i-h3-sid"
>> + "allwinner,sun50i-a64-sid"
>>
>> - reg: Should contain registers location and length
>>
>> diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c
>> index 0d6648be93b8..3c9fd4fb9207 100644
>> --- a/drivers/nvmem/sunxi_sid.c
>> +++ b/drivers/nvmem/sunxi_sid.c
>> @@ -199,10 +199,16 @@ static const struct sunxi_sid_cfg sun8i_h3_cfg = {
>> .need_register_readout = true,
>> };
>>
>> +static const struct sunxi_sid_cfg sun50i_a64_cfg = {
>> + .value_offset = 0x200,
>> + .size = 0x100,
>> +};
>> +
>
> How did you get those values?
>
> Also, it's reported that the SID can only be accessed in secure mode,
> did you test it?
>
> Maxime
>

\
 
 \ /
  Last update: 2017-10-09 14:21    [W:0.105 / U:1.924 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site