Re: [PATCH 2/3] ARM: msm: Re-organize platsmp to make it extensible

From: Rohit Vaswani
Date: Tue Jun 04 2013 - 18:52:29 EST

On 6/4/2013 2:32 AM, Russell King - ARM Linux wrote:
On Mon, Jun 03, 2013 at 05:19:44PM -0700, Rohit Vaswani wrote:
+ sc1_base_ptr = of_iomap(dn, 0);
+ if (sc1_base_ptr) {
+ writel_relaxed(0, sc1_base_ptr + VDD_SC1_ARRAY_CLAMP_GFS_CTL);
+ writel_relaxed(0, sc1_base_ptr + SCSS_CPU1CORE_RESET);
+ writel_relaxed(3, sc1_base_ptr + SCSS_DBG_STATUS_CORE_PWRDUP);
+ mb();
+ iounmap(sc1_base_ptr);
If you need to fiddle with power rails and resets for your secondary
core, you don't need any of the pen_release stuff, and you really
should get rid of it. The pen_release stuff is only there for
platforms where there's no proper way of controlling the secondary
CPUs except by using a software method.

We currently don't have hotplug support as that also needs pen_release. We still need to do this.
We could change that behavior, but we would need more time for that. Please could we let this go through and cleanup the pen_release once we have hotplug working.

Rohit Vaswani

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