190 lines
3.9 KiB
C
190 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* AM33XX Arch Power Management Routines
|
|
*
|
|
* Copyright (C) 2016-2018 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Dave Gerlach
|
|
*/
|
|
|
|
#include <asm/smp_scu.h>
|
|
#include <asm/suspend.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/platform_data/pm33xx.h>
|
|
|
|
#include "cm33xx.h"
|
|
#include "common.h"
|
|
#include "control.h"
|
|
#include "clockdomain.h"
|
|
#include "iomap.h"
|
|
#include "omap_hwmod.h"
|
|
#include "pm.h"
|
|
#include "powerdomain.h"
|
|
#include "prm33xx.h"
|
|
#include "soc.h"
|
|
#include "sram.h"
|
|
|
|
static struct powerdomain *cefuse_pwrdm, *gfx_pwrdm, *per_pwrdm, *mpu_pwrdm;
|
|
static struct clockdomain *gfx_l4ls_clkdm;
|
|
static void __iomem *scu_base;
|
|
|
|
static int __init am43xx_map_scu(void)
|
|
{
|
|
scu_base = ioremap(scu_a9_get_base(), SZ_256);
|
|
|
|
if (!scu_base)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amx3_common_init(void)
|
|
{
|
|
gfx_pwrdm = pwrdm_lookup("gfx_pwrdm");
|
|
per_pwrdm = pwrdm_lookup("per_pwrdm");
|
|
mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
|
|
|
|
if ((!gfx_pwrdm) || (!per_pwrdm) || (!mpu_pwrdm))
|
|
return -ENODEV;
|
|
|
|
(void)clkdm_for_each(omap_pm_clkdms_setup, NULL);
|
|
|
|
/* CEFUSE domain can be turned off post bootup */
|
|
cefuse_pwrdm = pwrdm_lookup("cefuse_pwrdm");
|
|
if (cefuse_pwrdm)
|
|
omap_set_pwrdm_state(cefuse_pwrdm, PWRDM_POWER_OFF);
|
|
else
|
|
pr_err("PM: Failed to get cefuse_pwrdm\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int am33xx_suspend_init(void)
|
|
{
|
|
int ret;
|
|
|
|
gfx_l4ls_clkdm = clkdm_lookup("gfx_l4ls_gfx_clkdm");
|
|
|
|
if (!gfx_l4ls_clkdm) {
|
|
pr_err("PM: Cannot lookup gfx_l4ls_clkdm clockdomains\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = amx3_common_init();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int am43xx_suspend_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = am43xx_map_scu();
|
|
if (ret) {
|
|
pr_err("PM: Could not ioremap SCU\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = amx3_common_init();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void amx3_pre_suspend_common(void)
|
|
{
|
|
omap_set_pwrdm_state(gfx_pwrdm, PWRDM_POWER_OFF);
|
|
}
|
|
|
|
static void amx3_post_suspend_common(void)
|
|
{
|
|
int status;
|
|
/*
|
|
* Because gfx_pwrdm is the only one under MPU control,
|
|
* comment on transition status
|
|
*/
|
|
status = pwrdm_read_pwrst(gfx_pwrdm);
|
|
if (status != PWRDM_POWER_OFF)
|
|
pr_err("PM: GFX domain did not transition: %x\n", status);
|
|
}
|
|
|
|
static int am33xx_suspend(unsigned int state, int (*fn)(unsigned long))
|
|
{
|
|
int ret = 0;
|
|
|
|
amx3_pre_suspend_common();
|
|
ret = cpu_suspend(0, fn);
|
|
amx3_post_suspend_common();
|
|
|
|
/*
|
|
* BUG: GFX_L4LS clock domain needs to be woken up to
|
|
* ensure thet L4LS clock domain does not get stuck in
|
|
* transition. If that happens L3 module does not get
|
|
* disabled, thereby leading to PER power domain
|
|
* transition failing
|
|
*/
|
|
|
|
clkdm_wakeup(gfx_l4ls_clkdm);
|
|
clkdm_sleep(gfx_l4ls_clkdm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long))
|
|
{
|
|
int ret = 0;
|
|
|
|
amx3_pre_suspend_common();
|
|
scu_power_mode(scu_base, SCU_PM_POWEROFF);
|
|
ret = cpu_suspend(0, fn);
|
|
scu_power_mode(scu_base, SCU_PM_NORMAL);
|
|
amx3_post_suspend_common();
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct am33xx_pm_sram_addr *amx3_get_sram_addrs(void)
|
|
{
|
|
if (soc_is_am33xx())
|
|
return &am33xx_pm_sram;
|
|
else if (soc_is_am437x())
|
|
return &am43xx_pm_sram;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
static struct am33xx_pm_platform_data am33xx_ops = {
|
|
.init = am33xx_suspend_init,
|
|
.soc_suspend = am33xx_suspend,
|
|
.get_sram_addrs = amx3_get_sram_addrs,
|
|
};
|
|
|
|
static struct am33xx_pm_platform_data am43xx_ops = {
|
|
.init = am43xx_suspend_init,
|
|
.soc_suspend = am43xx_suspend,
|
|
.get_sram_addrs = amx3_get_sram_addrs,
|
|
};
|
|
|
|
static struct am33xx_pm_platform_data *am33xx_pm_get_pdata(void)
|
|
{
|
|
if (soc_is_am33xx())
|
|
return &am33xx_ops;
|
|
else if (soc_is_am437x())
|
|
return &am43xx_ops;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
void __init amx3_common_pm_init(void)
|
|
{
|
|
struct am33xx_pm_platform_data *pdata;
|
|
struct platform_device_info devinfo;
|
|
|
|
pdata = am33xx_pm_get_pdata();
|
|
|
|
memset(&devinfo, 0, sizeof(devinfo));
|
|
devinfo.name = "pm33xx";
|
|
devinfo.data = pdata;
|
|
devinfo.size_data = sizeof(*pdata);
|
|
devinfo.id = -1;
|
|
platform_device_register_full(&devinfo);
|
|
}
|