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rockchip: spl: support low power detect 

Signed-off-by: Jason Zhu <jason.zhu@rock-chips.com>
Change-Id: Ibcb5996369348d31248596dcdb5018ad6526786e
This commit is contained in:
Jason Zhu 2020-09-28 14:52:00 +08:00 committed by Jianhong Chen
parent c056ffb327
commit c90ee5c73d
3 changed files with 38 additions and 1 deletions
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27
arch/arm/mach-rockchip/spl.c
View File

@ -14,6 +14,7 @@
#include <ram.h>
#include <spl.h>
#include <optee_include/OpteeClientInterface.h>
#include <power/fuel_gauge.h>
#include <asm/arch/bootrom.h>
#ifdef CONFIG_ROCKCHIP_PRELOADER_ATAGS
#include <asm/arch/rk_atags.h>
@ -316,6 +317,26 @@ static int spl_rockchip_dnl_key_pressed(void)
#endif
}
#ifdef CONFIG_SPL_DM_FUEL_GAUGE
bool spl_is_low_power(void)
{
struct udevice *dev;
int ret, voltage;
ret = uclass_get_device(UCLASS_FG, 0, &dev);
if (ret) {
debug("Get charge display failed, ret=%d\n", ret);
return false;
}
voltage = fuel_gauge_get_voltage(dev);
if (voltage >= CONFIG_SPL_POWER_LOW_VOLTAGE_THRESHOLD)
return false;
return true;
}
#endif
void spl_next_stage(struct spl_image_info *spl)
{
uint32_t reg_boot_mode;
@ -324,6 +345,12 @@ void spl_next_stage(struct spl_image_info *spl)
spl->next_stage = SPL_NEXT_STAGE_UBOOT;
return;
}
#ifdef CONFIG_SPL_DM_FUEL_GAUGE
if (spl_is_low_power()) {
spl->next_stage = SPL_NEXT_STAGE_UBOOT;
return;
}
#endif
reg_boot_mode = readl((void *)CONFIG_ROCKCHIP_BOOT_MODE_REG);
switch (reg_boot_mode) {

10
drivers/power/fuel_gauge/Kconfig
View File

@ -57,3 +57,13 @@ config SPL_POWER_FG_RK816
depends on DM_FUEL_GAUGE && PMIC_RK8XX
help
This adds support for RK816 fuel gauge support.
config SPL_POWER_LOW_VOLTAGE_THRESHOLD
int "Set the low voltage threshold"
default 3400
depends on SPL_DM_FUEL_GAUGE
help
Set the low voltage threshold. If the voltage, which is detected,
is lower than the low voltage threshold, load and boot the U-Boot
and goto charge the power.

2
drivers/power/fuel_gauge/Makefile
View File

@ -5,7 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-$(CONFIG_DM_FUEL_GAUGE) += fuel_gauge_uclass.o
obj-$(CONFIG_$(SPL_)DM_FUEL_GAUGE) += fuel_gauge_uclass.o
obj-$(CONFIG_POWER_FG_CW201X) += fg_cw201x.o
obj-$(CONFIG_POWER_FG_MAX17042) += fg_max17042.o