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ARM: OMAP3: Add cpuidle parameters table for omap3430

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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 5a1b1d3a9e ("OMAP3: RX-51: Pass cpu idle parameters")
which were later removed by commit 231900afba ("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: 231900afba ("ARM: OMAP3: cpuidle - remove rx51 cpuidle
parameters table")
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Pali Rohár 2016-02-19 10:35:39 -08:00 committed by Tony Lindgren
parent 92e963f50f
commit 98f4222150
1 changed files with 68 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
arch/arm/mach-omap2/cpuidle34xx.c
View File

@ -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 {
@ -315,6 +316,69 @@ static struct cpuidle_driver omap3_idle_driver = {
.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 */
/**
@ -333,5 +397,8 @@ 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);
}