Thread (20 messages) 20 messages, 9 authors, 2012-01-18

[PATCH V2 1/4] cpufreq: add arm soc generic cpufreq driver

From: Bryan Huntsman <hidden>
Date: 2011-12-16 19:59:02
Also in: linux-arm-msm, linux-devicetree

On 12/16/2011 02:52 AM, Jamie Iles wrote:
quoted
+static DEFINE_PER_CPU(unsigned long, l_p_j_ref);
+static unsigned long l_p_j_ref_freq;
+
+static struct clk *cpu_clk;
This assumes that all CPU's share the same clk and run at the same rate.  
Is that a fair/safe assumption?  I honestly don't know the answer to 
this so it's just a question!!!
On MSM, cpus independently scale both frequency and voltage.  Our clock
driver isn't upstream yet.  David Brown has a preliminary version here:

https://www.codeaurora.org/gitweb/quic/kernel/?p=davidb/linux-msm.git;a=shortlog;h=refs/heads/msm-clock-rfc

Once we get our driver upstream, MSM will be an exception and not select
ARM_GENERIC_CPUFREQ.  We'll probably have a separate msm-cpufreq.c
driver under drivers/cpufreq/.

- Bryan

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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