From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:43011 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929AbcEHNBZ (ORCPT ); Sun, 8 May 2016 09:01:25 -0400 Subject: Patch "cpufreq: st: enable selective initialization based on the platform" has been added to the 4.5-stable tree To: Sudeep.Holla@arm.com, gregkh@linuxfoundation.org, lee.jones@linaro.org, rafael.j.wysocki@intel.com, sudeep.holla@arm.com, viresh.kumar@linaro.org Cc: , From: Date: Sun, 08 May 2016 15:01:08 +0200 Message-ID: <146271246873251@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled cpufreq: st: enable selective initialization based on the platform to the 4.5-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: cpufreq-st-enable-selective-initialization-based-on-the-platform.patch and it can be found in the queue-4.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 2482bc31ca8096241b8fa97610ef23154ce55f45 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Wed, 27 Apr 2016 17:18:59 +0100 Subject: cpufreq: st: enable selective initialization based on the platform From: Sudeep Holla commit 2482bc31ca8096241b8fa97610ef23154ce55f45 upstream. The sti-cpufreq does unconditional registration of the cpufreq-dt driver which causes issue on an multi-platform build. For example, on Vexpress TC2 platform, we get the following error on boot: cpu cpu0: OPP-v2 not supported cpu cpu0: Not doing voltage scaling cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:0, -19 cpu cpu0: dev_pm_opp_get_max_volt_latency: Invalid regulator (-6) ... arm_big_little: bL_cpufreq_register: Failed registering platform driver: vexpress-spc, err: -17 The actual driver fails to initialise as cpufreq-dt is probed successfully, which is incorrect. This issue can happen to any platform not using cpufreq-dt in a multi-platform build. This patch adds a check to do selective initialization of the driver. Fixes: ab0ea257fc58 (cpufreq: st: Provide runtime initialised driver for ST's platforms) Signed-off-by: Sudeep Holla Acked-by: Viresh Kumar Acked-by: Lee Jones Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/cpufreq/sti-cpufreq.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/cpufreq/sti-cpufreq.c +++ b/drivers/cpufreq/sti-cpufreq.c @@ -259,6 +259,10 @@ static int sti_cpufreq_init(void) { int ret; + if ((!of_machine_is_compatible("st,stih407")) && + (!of_machine_is_compatible("st,stih410"))) + return -ENODEV; + ddata.cpu = get_cpu_device(0); if (!ddata.cpu) { dev_err(ddata.cpu, "Failed to get device for CPU0\n"); Patches currently in stable-queue which might be from Sudeep.Holla@arm.com are queue-4.5/cpufreq-st-enable-selective-initialization-based-on-the-platform.patch