diff options
| author | Anson Huang <b20788@freescale.com> | 2014-10-20 16:16:20 +0800 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2015-01-15 21:18:24 -0600 |
| commit | 95769d948ae37838aa3206f2d964ce7fe06d09e7 (patch) | |
| tree | 920fa79b584b776f4c28d0219b2de8e494f711b2 /arch/arm/mach-imx/cpuidle-imx6q.c | |
| parent | ee24070ba739ddc2ce623874b0e626333dfd5575 (diff) | |
MLK-9708 arm: imx: add low power idle support for i.mx6sx
1. improve imx6q_set_int_mem_clk_lpm routine;
2. export rbc enable interface for cpuidle;
3. enable low power idle for i.MX6SX:
WFI -> first level idle;
WAIT mode -> second level idle;
Low power idle -> third level idle, only when system is in low bus mode.
In low powe idle mode, below operations will be done:
ARM power off;
AHB freq lower to 3MHz;
PERCLK freq lower to 6MHz;
MMDC freq lower to 1MHz;
Anatop will be put into low power mode, and regular band-gap will
be off and low power band-gap will be enabled instead.
Also, in low power idle mode, 24MHz XTAL power will be off and 24MHz clk
source will be switched to RC-OSC to save power, this feature is only
enabled on i.MX6SX TO1.2.
Signed-off-by: Anson Huang <b20788@freescale.com>
Diffstat (limited to 'arch/arm/mach-imx/cpuidle-imx6q.c')
| -rw-r--r-- | arch/arm/mach-imx/cpuidle-imx6q.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c index d88448209354..b458490f59a2 100644 --- a/arch/arm/mach-imx/cpuidle-imx6q.c +++ b/arch/arm/mach-imx/cpuidle-imx6q.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2012 Freescale Semiconductor, Inc. + * Copyright (C) 2012-2014 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -66,7 +66,7 @@ static struct cpuidle_driver imx6q_cpuidle_driver = { int __init imx6q_cpuidle_init(void) { /* Set INT_MEM_CLK_LPM bit to get a reliable WAIT mode support */ - imx6q_set_int_mem_clk_lpm(); + imx6q_set_int_mem_clk_lpm(true); return cpuidle_register(&imx6q_cpuidle_driver, NULL); } |