[PATCH 2/2] ARM: bus: da8xx-mstpri: new driver

Sekhar Nori nsekhar at ti.com
Mon Oct 31 09:52:03 UTC 2016


Hi Bartosz,

On Monday 31 October 2016 03:10 PM, Bartosz Golaszewski wrote:
> 2016-10-31 5:30 GMT+01:00 Rob Herring <robh at kernel.org>:
>> 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 at baylibre.com>
>>> ---
>>>  .../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


More information about the dri-devel mailing list