forked from Minki/linux
779b56bb67
Since commit879c0e5e0a
("ARM: imx: Remove i.MX27 board files") the following W=1 build warning is seen: arch/arm/mach-imx/pm-imx27.c:40:13: warning: no previous prototype for 'imx27_pm_init' [-Wmissing-prototypes] Fix it by including the "common.h" header file, which contains the prototype for imx27_pm_init(). Fixes:879c0e5e0a
("ARM: imx: Remove i.MX27 board files") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
/*
|
|
* i.MX27 Power Management Routines
|
|
*
|
|
* Based on Freescale's BSP
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License.
|
|
*/
|
|
|
|
#include <linux/of_address.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/io.h>
|
|
|
|
#include "common.h"
|
|
#include "hardware.h"
|
|
|
|
static int mx27_suspend_enter(suspend_state_t state)
|
|
{
|
|
void __iomem *ccm_base;
|
|
struct device_node *np;
|
|
u32 cscr;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm");
|
|
ccm_base = of_iomap(np, 0);
|
|
BUG_ON(!ccm_base);
|
|
|
|
switch (state) {
|
|
case PM_SUSPEND_MEM:
|
|
/* Clear MPEN and SPEN to disable MPLL/SPLL */
|
|
cscr = imx_readl(ccm_base);
|
|
cscr &= 0xFFFFFFFC;
|
|
imx_writel(cscr, ccm_base);
|
|
/* Executes WFI */
|
|
cpu_do_idle();
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_suspend_ops mx27_suspend_ops = {
|
|
.enter = mx27_suspend_enter,
|
|
.valid = suspend_valid_only_mem,
|
|
};
|
|
|
|
void __init imx27_pm_init(void)
|
|
{
|
|
suspend_set_ops(&mx27_suspend_ops);
|
|
}
|