forked from mirrors/linux
ARM: OMAP2+: pm33xx-core: Add platform code needed for PM
Most of the PM code needed for am335x and am437x can be moved into a module under drivers but some core code must remain in mach-omap2 at the moment. This includes some internal clockdomain APIs and low-level ARM APIs which are also not exported for use by modules. Implement a few functions that handle these low-level platform operations can be passed to the pm33xx module through the use of platform data. In addition to this, to be able to share data structures between C and the sleep33xx and sleep43xx assembly code, we can automatically generate all of the C struct member offsets and sizes as macros by processing pm-asm-offsets.c into assembly code and then extracting the relevant data as is done for the generated platform asm-offsets.h files. Finally, add amx3_common_pm_init to create a dummy platform_device for pm33xx so that our soon to be introduced pm33xx module can probe on am335x and am437x platforms to enable basic suspend to mem and standby support. Signed-off-by: Dave Gerlach <d-gerlach@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Dave Gerlach
Tony Lindgren
parent
41d37e6137
commit
41d9d44d72
10 changed files with 295 additions and 0 deletions
|
|
@ -72,6 +72,7 @@ config SOC_AM43XX
|
|||
select ARM_ERRATA_754322
|
||||
select ARM_ERRATA_775420
|
||||
select OMAP_INTERCONNECT
|
||||
select ARM_CPU_SUSPEND if PM
|
||||
|
||||
config SOC_DRA7XX
|
||||
bool "TI DRA7XX"
|
||||
|
|
|
|||
|
|
@ -88,6 +88,8 @@ omap-4-5-pm-common += pm44xx.o
|
|||
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common)
|
||||
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common)
|
||||
obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-pm-common)
|
||||
obj-$(CONFIG_SOC_AM33XX) += pm33xx-core.o sleep33xx.o
|
||||
obj-$(CONFIG_SOC_AM43XX) += pm33xx-core.o sleep43xx.o
|
||||
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
|
||||
|
||||
obj-$(CONFIG_POWER_AVS_OMAP) += sr_device.o
|
||||
|
|
@ -95,6 +97,8 @@ obj-$(CONFIG_POWER_AVS_OMAP_CLASS3) += smartreflex-class3.o
|
|||
|
||||
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
|
||||
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a$(plus_sec)
|
||||
AFLAGS_sleep33xx.o :=-Wa,-march=armv7-a$(plus_sec)
|
||||
AFLAGS_sleep43xx.o :=-Wa,-march=armv7-a$(plus_sec)
|
||||
|
||||
endif
|
||||
|
||||
|
|
@ -232,3 +236,15 @@ obj-y += $(omap-hsmmc-m) $(omap-hsmmc-y)
|
|||
obj-y += omap_phy_internal.o
|
||||
|
||||
obj-$(CONFIG_MACH_OMAP2_TUSB6010) += usb-tusb6010.o
|
||||
|
||||
arch/arm/mach-omap2/pm-asm-offsets.s: arch/arm/mach-omap2/pm-asm-offsets.c
|
||||
$(call if_changed_dep,cc_s_c)
|
||||
|
||||
include/generated/ti-pm-asm-offsets.h: arch/arm/mach-omap2/pm-asm-offsets.s FORCE
|
||||
$(call filechk,offsets,__TI_PM_ASM_OFFSETS_H__)
|
||||
|
||||
# For rule to generate ti-emif-asm-offsets.h dependency
|
||||
include drivers/memory/Makefile.asm-offsets
|
||||
|
||||
arch/arm/mach-omap2/sleep33xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
|
||||
arch/arm/mach-omap2/sleep43xx.o: include/generated/ti-pm-asm-offsets.h include/generated/ti-emif-asm-offsets.h
|
||||
|
|
|
|||
|
|
@ -77,6 +77,13 @@ static inline int omap4_pm_init_early(void)
|
|||
}
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_PM) && (defined(CONFIG_SOC_AM33XX) || \
|
||||
defined(CONFIG_SOC_AM43XX))
|
||||
void amx3_common_pm_init(void);
|
||||
#else
|
||||
static inline void amx3_common_pm_init(void) { }
|
||||
#endif
|
||||
|
||||
extern void omap2_init_common_infrastructure(void);
|
||||
|
||||
extern void omap_init_time(void);
|
||||
|
|
|
|||
|
|
@ -622,6 +622,7 @@ void __init am33xx_init_early(void)
|
|||
void __init am33xx_init_late(void)
|
||||
{
|
||||
omap_common_late_init();
|
||||
amx3_common_pm_init();
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -646,6 +647,7 @@ void __init am43xx_init_late(void)
|
|||
{
|
||||
omap_common_late_init();
|
||||
omap2_clk_enable_autoidle_all();
|
||||
amx3_common_pm_init();
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
|
|||
31
arch/arm/mach-omap2/pm-asm-offsets.c
Normal file
31
arch/arm/mach-omap2/pm-asm-offsets.c
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* TI AM33XX and AM43XX PM Assembly Offsets
|
||||
*
|
||||
* Copyright (C) 2017-2018 Texas Instruments Inc.
|
||||
*/
|
||||
|
||||
#include <linux/kbuild.h>
|
||||
#include <linux/platform_data/pm33xx.h>
|
||||
|
||||
int main(void)
|
||||
{
|
||||
DEFINE(AMX3_PM_WFI_FLAGS_OFFSET,
|
||||
offsetof(struct am33xx_pm_sram_data, wfi_flags));
|
||||
DEFINE(AMX3_PM_L2_AUX_CTRL_VAL_OFFSET,
|
||||
offsetof(struct am33xx_pm_sram_data, l2_aux_ctrl_val));
|
||||
DEFINE(AMX3_PM_L2_PREFETCH_CTRL_VAL_OFFSET,
|
||||
offsetof(struct am33xx_pm_sram_data, l2_prefetch_ctrl_val));
|
||||
DEFINE(AMX3_PM_SRAM_DATA_SIZE, sizeof(struct am33xx_pm_sram_data));
|
||||
|
||||
BLANK();
|
||||
|
||||
DEFINE(AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET,
|
||||
offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_virt));
|
||||
DEFINE(AMX3_PM_RO_SRAM_DATA_PHYS_OFFSET,
|
||||
offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_phys));
|
||||
DEFINE(AMX3_PM_RO_SRAM_DATA_SIZE,
|
||||
sizeof(struct am33xx_pm_ro_sram_data));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -81,6 +81,9 @@ extern unsigned int omap3_do_wfi_sz;
|
|||
/* ... and its pointer from SRAM after copy */
|
||||
extern void (*omap3_do_wfi_sram)(void);
|
||||
|
||||
extern struct am33xx_pm_sram_addr am33xx_pm_sram;
|
||||
extern struct am33xx_pm_sram_addr am43xx_pm_sram;
|
||||
|
||||
extern void omap3_save_scratchpad_contents(void);
|
||||
|
||||
#define PM_RTA_ERRATUM_i608 (1 << 0)
|
||||
|
|
|
|||
189
arch/arm/mach-omap2/pm33xx-core.c
Normal file
189
arch/arm/mach-omap2/pm33xx-core.c
Normal file
|
|
@ -0,0 +1,189 @@
|
|||
// 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);
|
||||
}
|
||||
|
|
@ -6,6 +6,8 @@
|
|||
* Dave Gerlach, Vaibhav Bedia
|
||||
*/
|
||||
|
||||
#include <generated/ti-emif-asm-offsets.h>
|
||||
#include <generated/ti-pm-asm-offsets.h>
|
||||
#include <linux/linkage.h>
|
||||
#include <linux/ti-emif-sram.h>
|
||||
#include <asm/assembler.h>
|
||||
|
|
|
|||
|
|
@ -6,6 +6,8 @@
|
|||
* Dave Gerlach, Vaibhav Bedia
|
||||
*/
|
||||
|
||||
#include <generated/ti-emif-asm-offsets.h>
|
||||
#include <generated/ti-pm-asm-offsets.h>
|
||||
#include <linux/linkage.h>
|
||||
#include <linux/ti-emif-sram.h>
|
||||
|
||||
|
|
|
|||
42
include/linux/platform_data/pm33xx.h
Normal file
42
include/linux/platform_data/pm33xx.h
Normal file
|
|
@ -0,0 +1,42 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* TI pm33xx platform data
|
||||
*
|
||||
* Copyright (C) 2016-2018 Texas Instruments, Inc.
|
||||
* Dave Gerlach <d-gerlach@ti.com>
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_PLATFORM_DATA_PM33XX_H
|
||||
#define _LINUX_PLATFORM_DATA_PM33XX_H
|
||||
|
||||
#include <linux/kbuild.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
#ifndef __ASSEMBLER__
|
||||
struct am33xx_pm_sram_addr {
|
||||
void (*do_wfi)(void);
|
||||
unsigned long *do_wfi_sz;
|
||||
unsigned long *resume_offset;
|
||||
unsigned long *emif_sram_table;
|
||||
unsigned long *ro_sram_data;
|
||||
};
|
||||
|
||||
struct am33xx_pm_platform_data {
|
||||
int (*init)(void);
|
||||
int (*soc_suspend)(unsigned int state, int (*fn)(unsigned long));
|
||||
struct am33xx_pm_sram_addr *(*get_sram_addrs)(void);
|
||||
};
|
||||
|
||||
struct am33xx_pm_sram_data {
|
||||
u32 wfi_flags;
|
||||
u32 l2_aux_ctrl_val;
|
||||
u32 l2_prefetch_ctrl_val;
|
||||
} __packed __aligned(8);
|
||||
|
||||
struct am33xx_pm_ro_sram_data {
|
||||
u32 amx3_pm_sram_data_virt;
|
||||
u32 amx3_pm_sram_data_phys;
|
||||
} __packed __aligned(8);
|
||||
|
||||
#endif /* __ASSEMBLER__ */
|
||||
#endif /* _LINUX_PLATFORM_DATA_PM33XX_H */
|
||||
Loading…
Reference in a new issue