mirror of
https://github.com/torvalds/linux.git
synced 2024-11-20 11:01:38 +00:00
dee5dee2a5
Add basic MSL support for i.MX6SLL. The i.MX 6SoloLiteLite application processors are NXP's latest additions to a growing family of multimedia-focused products offering high-performance processing optimized for lowest power consumption. The i.MX 6SoloLiteLite processors feature NXP's advanced implementation of the ARM Cortex-A9 core, which can be interfaced with LPDDR3 and LPDDR2 DRAM memory devices. Signed-off-by: Bai Ping <ping.bai@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
|
|
* Copyright (C) 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
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/cpuidle.h>
|
|
#include <linux/module.h>
|
|
#include <asm/cpuidle.h>
|
|
|
|
#include "common.h"
|
|
#include "cpuidle.h"
|
|
#include "hardware.h"
|
|
|
|
static int imx6sl_enter_wait(struct cpuidle_device *dev,
|
|
struct cpuidle_driver *drv, int index)
|
|
{
|
|
imx6_set_lpm(WAIT_UNCLOCKED);
|
|
/*
|
|
* Software workaround for ERR005311, see function
|
|
* description for details.
|
|
*/
|
|
if (cpu_is_imx6sl())
|
|
imx6sl_set_wait_clk(true);
|
|
cpu_do_idle();
|
|
if (cpu_is_imx6sl())
|
|
imx6sl_set_wait_clk(false);
|
|
imx6_set_lpm(WAIT_CLOCKED);
|
|
|
|
return index;
|
|
}
|
|
|
|
static struct cpuidle_driver imx6sl_cpuidle_driver = {
|
|
.name = "imx6sl_cpuidle",
|
|
.owner = THIS_MODULE,
|
|
.states = {
|
|
/* WFI */
|
|
ARM_CPUIDLE_WFI_STATE,
|
|
/* WAIT */
|
|
{
|
|
.exit_latency = 50,
|
|
.target_residency = 75,
|
|
.flags = CPUIDLE_FLAG_TIMER_STOP,
|
|
.enter = imx6sl_enter_wait,
|
|
.name = "WAIT",
|
|
.desc = "Clock off",
|
|
},
|
|
},
|
|
.state_count = 2,
|
|
.safe_state_index = 0,
|
|
};
|
|
|
|
int __init imx6sl_cpuidle_init(void)
|
|
{
|
|
return cpuidle_register(&imx6sl_cpuidle_driver, NULL);
|
|
}
|