Patch "ARM: OMAP3: Add cpuidle parameters table for omap3430" has been added to the 3.14-stable tree
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This is a note to let you know that I've just added the patch titled
ARM: OMAP3: Add cpuidle parameters table for omap3430
to the 3.14-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:
arm-omap3-add-cpuidle-parameters-table-for-omap3430.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.
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98f42221501353067251fbf11e732707dbb68ce3Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <[email protected]>
Date: Fri, 19 Feb 2016 10:35:39 -0800
Subject: ARM: OMAP3: Add cpuidle parameters table for omap3430
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From: Pali Rohár <[email protected]>
commit 98f42221501353067251fbf11e732707dbb68ce3 upstream.
Based on CPU type choose generic omap3 or omap3430 specific cpuidle parameters. Parameters for omap3430 were measured on Nokia N900 device and added by commit 5a1b1d3a9efa ("OMAP3: RX-51: Pass cpu idle parameters") which were later removed by commit 231900afba52 ("ARM: OMAP3: cpuidle - remove rx51 cpuidle parameters table") due to huge code complexity.
This patch brings cpuidle parameters for omap3430 devices again, but uses simple condition based on CPU type.
parameters table")
--- arch/arm/mach-omap2/cpuidle34xx.c | 69 +++++++++++++++++++++++++++++++++++++- 1 file changed, 68 insertions(+), 1 deletion(-)
arch/arm/mach-omap2/cpuidle34xx.c +68 -1
@@ -34,6 +34,7 @@#include "pm.h" #include "control.h" #include "common.h" +#include "soc.h" /* Mach specific information to be recorded in the C-state driver_data */ struct omap3_idle_statedata {
@@ -322,6 +323,69 @@ static struct cpuidle_driver omap3_idle_ .safe_state_index = 0, }; +/* +* Numbers based on measurements made in October 2009 for PM optimized kernel +* with CPU freq enabled on device Nokia N900. Assumes OPP2 (main idle OPP, +* and worst case latencies). +*/ +static struct cpuidle_driver omap3430_idle_driver = { + .name ="omap3430_idle" , + .owner =THIS_MODULE , + .states = { + { + .enter = omap3_enter_idle_bm, + .exit_latency =110 +162 , + .target_residency =5 , + .name ="C1" , + .desc ="MPU ON + CORE ON" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =106 +180 , + .target_residency =309 , + .name ="C2" , + .desc ="MPU ON + CORE ON" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =107 +410 , + .target_residency =46057 , + .name ="C3" , + .desc ="MPU RET + CORE ON" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =121 +3374 , + .target_residency =46057 , + .name ="C4" , + .desc ="MPU OFF + CORE ON" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =855 +1146 , + .target_residency =46057 , + .name ="C5" , + .desc ="MPU RET + CORE RET" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =7580 +4134 , + .target_residency =484329 , + .name ="C6" , + .desc ="MPU OFF + CORE RET" , + }, + { + .enter = omap3_enter_idle_bm, + .exit_latency =7505 +15274 , + .target_residency =484329 , + .name ="C7" , + .desc ="MPU OFF + CORE OFF" , + }, + }, + .state_count =ARRAY_SIZE (omap3_idle_data), + .safe_state_index =0 , +}; +/* Public functions */ /**
@@ -340,5 +404,8 @@ int __init omap3_idle_init(void)if (!mpu_pd || !core_pd || !per_pd || !cam_pd)return -ENODEV ; -return cpuidle_register (&omap3_idle_driver,NULL ); +if (cpu_is_omap3430 ()) +return cpuidle_register (&omap3430_idle_driver,NULL ); +else +return cpuidle_register (&omap3_idle_driver,NULL ); }
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/arm-omap3-add-cpuidle-parameters-table-for-omap3430.patch