From: jon-hunter@ti•com (Jon Hunter)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 4/4] OMAP: mtd: gpmc: add DT bindings for GPMC timings and NAND
Date: Thu, 25 Oct 2012 08:16:21 -0500 [thread overview]
Message-ID: <50893BA5.8080600@ti.com> (raw)
In-Reply-To: <5088F19B.7050606@gmail.com>
On 10/25/2012 03:00 AM, Daniel Mack wrote:
> Hi Jon,
>
> many thanks for your time to look at this.
>
> On 25.10.2012 03:28, Jon Hunter wrote:
>> On 10/22/2012 02:55 PM, Daniel Mack wrote:
>>> diff --git a/Documentation/devicetree/bindings/bus/gpmc.txt b/Documentation/devicetree/bindings/bus/gpmc.txt
>>> new file mode 100644
>>> index 0000000..ef1c6e1
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/bus/gpmc.txt
>>> @@ -0,0 +1,59 @@
>>> +Device tree bindings for OMAP general purpose memory controllers (GPMC)
>>> +
>>> +The actual devices are instantiated from the child nodes of a GPMC node.
>>> +
>>> +Required properties:
>>> +
>>> + - compatible: Should be set to "ti,gpmc"
>>
>> Is this the only required property? I think that "reg" and "ti,hwmods"
>> are probably also required.
>
> Well yes, but at least "reg" is commonly omitted as it's part of a more
> "generic" set of properties. But ok, I can add these.
>
>> Also given that we are describing the hardware, I am wondering if the
>> number of chip-selects and wait signals should be defined here too. I
>> recall that different devices had different number of wait pins available.
>
> Hmm, that number is currently hard-coded in GPMC_CS_NUM. It would take
> some effort to make that dynamic but I agree that this would be a good
> thing to have. Afzal?
I believe that today all OMAP/AM devices have 8 chip-selects so probably
not a big deal. However, given we are moving to DT it would be nice to
move away from having such #defines for hardware related items.
Cheers
Jon
next prev parent reply other threads:[~2012-10-25 13:16 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-22 19:55 [PATCH 0/4] RFC: OMAP GPMC bindings Daniel Mack
2012-10-22 19:55 ` [PATCH 1/4] mtd: omap-nand: pass device_node in platform data Daniel Mack
2012-10-22 19:55 ` [PATCH 2/4] ARM: OMAP: gpmc: enable hwecc for AM33xx SoCs Daniel Mack
2012-10-22 19:55 ` [PATCH 3/4] ARM: OMAP: gpmc: don't create devices from initcall on DT Daniel Mack
2012-10-22 19:55 ` [PATCH 4/4] OMAP: mtd: gpmc: add DT bindings for GPMC timings and NAND Daniel Mack
2012-10-24 23:27 ` Tony Lindgren
2012-10-24 23:31 ` Daniel Mack
2012-10-29 8:10 ` Afzal Mohammed
2012-10-29 11:15 ` Daniel Mack
2012-10-29 11:28 ` Afzal Mohammed
2012-10-29 12:32 ` Daniel Mack
2012-10-29 12:56 ` Afzal Mohammed
2012-10-25 1:28 ` Jon Hunter
2012-10-25 8:00 ` Daniel Mack
2012-10-25 13:16 ` Jon Hunter [this message]
2012-10-29 8:09 ` Afzal Mohammed
2012-10-25 1:53 ` Jon Hunter
2012-10-25 9:43 ` Daniel Mack
2012-10-25 13:22 ` Jon Hunter
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