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 <stable@xxxxxxxxxxxxxxx> know about it.
>From 98f42221501353067251fbf11e732707dbb68ce3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali.rohar@xxxxxxxxx>
Date: Fri, 19 Feb 2016 10:35:39 -0800
Subject: ARM: OMAP3: Add cpuidle parameters table for omap3430
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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From: Pali Rohár <pali.rohar@xxxxxxxxx>
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.
Fixes: 231900afba52 ("ARM: OMAP3: cpuidle - remove rx51 cpuidle
parameters table")
Signed-off-by: Pali Rohár <pali.rohar@xxxxxxxxx>
Acked-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/cpuidle34xx.c | 69 +++++++++++++++++++++++++++++++++++++-
1 file changed, 68 insertions(+), 1 deletion(-)
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -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 pali.rohar@xxxxxxxxx are
queue-3.14/arm-omap3-add-cpuidle-parameters-table-for-omap3430.patch
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