Re: [PATCH v4 3/3] memory: tegra124-emc: Add EMC driver

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On 08/27/2014 01:32 AM, Tomeu Vizoso wrote:
On 08/26/2014 07:17 PM, Stephen Warren wrote:
On 08/26/2014 07:12 AM, Tomeu Vizoso wrote:
Sets the EMC clock rate based on the bandwidth requirements
registered by
memory clients through the PM_QOS_MEMORY_BANDWIDTH class.

Note: this is just an example and not a proper driver for a external
memory
controller. Its only purpose is to illustrate how such a driver would
set the
frequency of the external memory clock based on the bandwidth
requirements of
memory clients.

diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c

@@ -112,6 +117,11 @@ static void __init tegra_dt_init(void)
      parent = soc_device_to_device(soc_dev);

      /*
+     * HACK: register a platform device to probe the driver
+     */
+    platform_device_register(&tegra_emc);

I don't think this is a hack, except for the bug: That should only
happen on Tegra124 not on all Tegra SoCs.

Do you intend all 3 patches in this series to be merged? You'd mentioned
you didn't when asked about this for a previous version. I'm not sure if
that's changed?

Yeah, I don't want 3/3 merged because we don't have a functional EMC
clock yet on T124, and because I don't know yet where will be the best
place to have that code in. That depends on Mikko's work on the real EMC
driver which is in a bit of flux right now.

I have kept posting it just because I think it complements nicely the
explanation in the cover letter, but maybe confuses more than helps.

OK. If you make this one a [PATCH RFC], or add a note to that effect to the commit description (perhaps underneath the --- line), that'd be helpful for future postings.
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