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imx: imx8qm/imx8qxp: Power down the resources before SPL jump to u-boot

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Make sure that all devices that are powered up by SPL are powered down
before entering into the u-boot. Otherwise the subsystem/device will
never be powered down by SCFW, due to SPL and u-boot are in different
partitions.

Benefiting from power domain driver, this patch implements the function
"imx8_power_off_pd_devices" to power off all active devices.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2020-05-05 20:28:40 +08:00 committed by Stefano Babic
parent 8103767256
commit 231401de2e
4 changed files with 48 additions and 0 deletions
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1
arch/arm/include/asm/arch-imx8/sys_proto.h
View File

@ -28,3 +28,4 @@ int print_bootinfo(void);
int sc_pm_setup_uart(sc_rsrc_t uart_rsrc, sc_pm_clock_rate_t clk_rate);
int imx8_power_domain_lookup_name(const char *name,
struct power_domain *power_domain);
void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size);

6
board/freescale/imx8qm_mek/spl.c
View File

@ -12,6 +12,7 @@
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <asm/arch/sys_proto.h>
DECLARE_GLOBAL_DATA_PTR;
@ -37,6 +38,11 @@ void spl_board_init(void)
puts("Normal Boot\n");
}
void spl_board_prepare_for_boot(void)
{
imx8_power_off_pd_devices(NULL, 0);
}
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{

6
board/freescale/imx8qxp_mek/spl.c
View File

@ -17,6 +17,7 @@
#include <asm/arch/sci/sci.h>
#include <asm/arch/imx8-pins.h>
#include <asm/arch/iomux.h>
#include <asm/arch/sys_proto.h>
DECLARE_GLOBAL_DATA_PTR;
@ -55,6 +56,11 @@ void spl_board_init(void)
puts("Normal Boot\n");
}
void spl_board_prepare_for_boot(void)
{
imx_power_off_pd_devices(NULL, 0);
}
#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{

35
drivers/power/domain/imx8-power-domain-legacy.c
View File

@ -11,6 +11,7 @@
#include <asm/arch/power-domain.h>
#include <dm/device-internal.h>
#include <dm/device.h>
#include <dm/uclass-internal.h>
#include <asm/arch/sci/sci.h>
DECLARE_GLOBAL_DATA_PTR;
@ -19,6 +20,40 @@ struct imx8_power_domain_priv {
bool state_on;
};
static bool check_device_power_off(struct udevice *dev,
const char *permanent_on_devices[],
int size)
{
int i;
for (i = 0; i < size; i++) {
if (!strcmp(dev->name, permanent_on_devices[i]))
return false;
}
return true;
}
void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size)
{
struct udevice *dev;
struct power_domain pd;
for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev;
uclass_find_next_device(&dev)) {
if (!device_active(dev))
continue;
/*
* Power off active pd devices except the permanent
* power on devices
*/
if (check_device_power_off(dev, permanent_on_devices, size)) {
pd.dev = dev;
power_domain_off(&pd);
}
}
}
int imx8_power_domain_lookup_name(const char *name,
struct power_domain *power_domain)
{