On 07/30/2013 07:56 AM, Rajendra Nayak wrote:
On Tuesday 30 July 2013 06:16 PM, Nishanth Menon wrote:
On 07/30/2013 07:41 AM, Rajendra Nayak wrote:
On Tuesday 30 July 2013 06:00 PM, Nishanth Menon wrote:
On 07/30/2013 06:25 AM, Rajendra Nayak wrote:
From: R Sricharan <r.sricha...@ti.com>
[...]
+ mcspi4: spi@480ba000 {
+ compatible = "ti,omap4-mcspi";
+ reg = <0x480ba000 0x200>;
+ interrupts = <0 48 0x4>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ti,hwmods = "mcspi4";
+ ti,spi-num-cs = <1>;
+ dmas = <&sdma 70>, <&sdma 71>;
+ dma-names = "tx0", "rx0";
+ };
+ };
+};
ref: [1], we discussed that we should now be able to introduce all instances of
h/w blocks into the dra7.dts. Further, considering [2]
hmm, thats a long discussion on crossbar driver that [1] points to. Do you want
to summarize what you mean by 'introduce all instances of h/w blocks'
I recommend reading the last few emails on the thread about how we could do
this with pinctrl. unfortunately, this patch is not informative enough to
indicate that not all instances of the potential IP blocks are listed here.
would you not want to follow "status = disabled" for all modules by default and
enable required modules in board file, so that we dont have to respin this yet again?
Well, I was just following the convention of whats already followed on existing
OMAPs. See [3] for some views on these.
DRA7 case, I would not think it makes sense due to the number of product
variants being done, not all will use the same set. Further, rationale for DRA7
and my suggestion for Grant's option (1) is mainly because the product variants
will require more dtsis rather than board files using the product variants use
just the necessary modules from a common dtsi. Makes support of variants like
OMAP57xx etc trivial and constrainted to board file usage, rather than spinning
off new dtsis.
Makes sense with the different product variants for DRA7, AM335x already does
it this way, but the rest of OMAP3/4/5 are doing it the other way.
I think its just too confusing to follow different conventions for different
SoCs. We should stick to just one, either this way or that.
I think bucketing DRA7(with multitude of SoC variants) with OMAP
family(usually with <5 variants) will be a wrong approach. we should
choose the approach appropriate for the SoC. hence, OMAPx having all
default enabled makes sense (as the delta is usually trivial), but on
DRA7, the variants are larger :(
just my 2 cents.
[1] http://marc.info/?t=137416599400001&r=1&w=2
[2] http://marc.info/?l=linux-omap&m=137510358229479&w=2
[3]
http://lists.infradead.org/pipermail/linux-arm-kernel/2012-February/086297.html
--
Regards,
Nishanth Menon
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