Re: [PATCH 2/2] ARM: bus: da8xx-mstpri: new driver
From: Sekhar Nori
Date: Mon Oct 31 2016 - 05:53:01 EST
Hi Bartosz,
On Monday 31 October 2016 03:10 PM, Bartosz Golaszewski wrote:
> 2016-10-31 5:30 GMT+01:00 Rob Herring <robh@xxxxxxxxxx>:
>> On Wed, Oct 26, 2016 at 07:35:55PM +0200, Bartosz Golaszewski wrote:
>>> Create the driver for the da8xx master peripheral priority
>>> configuration and implement support for writing to the three
>>> Master Priority registers on da850 SoCs.
>>>
>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
>>> ---
>>> .../devicetree/bindings/bus/ti,da850-mstpri.txt | 20 ++
>>> drivers/bus/Kconfig | 9 +
>>> drivers/bus/Makefile | 2 +
>>> drivers/bus/da8xx-mstpri.c | 266 +++++++++++++++++++++
>>> 4 files changed, 297 insertions(+)
>>> create mode 100644 Documentation/devicetree/bindings/bus/ti,da850-mstpri.txt
>>> create mode 100644 drivers/bus/da8xx-mstpri.c
>>>
>>> diff --git a/Documentation/devicetree/bindings/bus/ti,da850-mstpri.txt b/Documentation/devicetree/bindings/bus/ti,da850-mstpri.txt
>>> new file mode 100644
>>> index 0000000..225af09
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/bus/ti,da850-mstpri.txt
>>> @@ -0,0 +1,20 @@
>>> +* Device tree bindings for Texas Instruments da8xx master peripheral
>>> + priority driver
>>> +
>>> +DA8XX SoCs feature a set of registers allowing to change the priority of all
>>> +peripherals classified as masters.
>>> +
>>> +Documentation:
>>> +OMAP-L138 (DA850) - http://www.ti.com/lit/ug/spruh82c/spruh82c.pdf
>>> +
>>> +Required properties:
>>> +
>>> +- compatible: "ti,da850-mstpri", "syscon" - for da850 based boards
>>
>> Drop syscon. Doesn't look like it is needed and the example doesn't
>> match.
>
> Hi Rob,
>
> it is needed: syscon_regmap_lookup_by_compatible() fails without it. I
> fixed the example instead.
Why are master priority registers under syscon? This driver should be
the only entity touching them. So do we need an MFD driver?
Thanks,
Sekhar