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ARM: OMAP2+: pm33xx: Add support for rtc+ddr in self refresh mode 

Add support for rtc+ddr in self refresh mode. Add addtional
pm hooks for save/restore and rtc suspend/resume.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Keerthy 2019-04-03 10:27:40 +05:30 committed by Tony Lindgren
parent 6256f7f7f2
commit 44c22a2d12
2 changed files with 80 additions and 1 deletions
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76
arch/arm/mach-omap2/pm33xx-core.c
View File

@ -10,6 +10,12 @@
#include <asm/suspend.h>
#include <linux/errno.h>
#include <linux/platform_data/pm33xx.h>
#include <linux/clk.h>
#include <linux/platform_data/gpio-omap.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/wkup_m3_ipc.h>
#include <linux/of.h>
#include <linux/rtc.h>
#include "cm33xx.h"
#include "common.h"
@ -38,6 +44,29 @@ static int am43xx_map_scu(void)
return 0;
}
static int am33xx_check_off_mode_enable(void)
{
if (enable_off_mode)
pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n");
/* off mode not supported on am335x so return 0 always */
return 0;
}
static int am43xx_check_off_mode_enable(void)
{
/*
* Check for am437x-gp-evm which has the right Hardware design to
* support this mode reliably.
*/
if (of_machine_is_compatible("ti,am437x-gp-evm") && enable_off_mode)
return enable_off_mode;
else if (enable_off_mode)
pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n");
return 0;
}
static int amx3_common_init(void)
{
gfx_pwrdm = pwrdm_lookup("gfx_pwrdm");
@ -139,7 +168,9 @@ static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long),
scu_power_mode(scu_base, SCU_PM_POWEROFF);
ret = cpu_suspend(args, fn);
scu_power_mode(scu_base, SCU_PM_NORMAL);
amx3_post_suspend_common();
if (!am43xx_check_off_mode_enable())
amx3_post_suspend_common();
return ret;
}
@ -161,10 +192,48 @@ void __iomem *am43xx_get_rtc_base_addr(void)
return omap_hwmod_get_mpu_rt_va(rtc_oh);
}
static void am43xx_save_context(void)
{
}
static void am33xx_save_context(void)
{
omap_intc_save_context();
}
static void am33xx_restore_context(void)
{
omap_intc_restore_context();
}
static void am43xx_restore_context(void)
{
/*
* HACK: restore dpll_per_clkdcoldo register contents, to avoid
* breaking suspend-resume
*/
writel_relaxed(0x0, AM33XX_L4_WK_IO_ADDRESS(0x44df2e14));
}
static void am43xx_prepare_rtc_suspend(void)
{
omap_hwmod_enable(rtc_oh);
}
static void am43xx_prepare_rtc_resume(void)
{
omap_hwmod_idle(rtc_oh);
}
static struct am33xx_pm_platform_data am33xx_ops = {
.init = am33xx_suspend_init,
.soc_suspend = am33xx_suspend,
.get_sram_addrs = amx3_get_sram_addrs,
.save_context = am33xx_save_context,
.restore_context = am33xx_restore_context,
.prepare_rtc_suspend = am43xx_prepare_rtc_suspend,
.prepare_rtc_resume = am43xx_prepare_rtc_resume,
.check_off_mode_enable = am33xx_check_off_mode_enable,
.get_rtc_base_addr = am43xx_get_rtc_base_addr,
};
@ -172,6 +241,11 @@ static struct am33xx_pm_platform_data am43xx_ops = {
.init = am43xx_suspend_init,
.soc_suspend = am43xx_suspend,
.get_sram_addrs = amx3_get_sram_addrs,
.save_context = am43xx_save_context,
.restore_context = am43xx_restore_context,
.prepare_rtc_suspend = am43xx_prepare_rtc_suspend,
.prepare_rtc_resume = am43xx_prepare_rtc_resume,
.check_off_mode_enable = am43xx_check_off_mode_enable,
.get_rtc_base_addr = am43xx_get_rtc_base_addr,
};

5
include/linux/platform_data/pm33xx.h
View File

@ -51,6 +51,11 @@ struct am33xx_pm_platform_data {
unsigned long args);
struct am33xx_pm_sram_addr *(*get_sram_addrs)(void);
void __iomem *(*get_rtc_base_addr)(void);
void (*save_context)(void);
void (*restore_context)(void);
void (*prepare_rtc_suspend)(void);
void (*prepare_rtc_resume)(void);
int (*check_off_mode_enable)(void);
};
struct am33xx_pm_sram_data {