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sysreset: implement MAX77663 sysreset functions

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MAX77663 PMIC has embedded poweroff function used by some
device to initiane device power off. Implement it as sysreset
driver.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
This commit is contained in:
Svyatoslav Ryhel 2023-10-24 10:49:05 +03:00 committed by Tom Rini
parent 102c4e3183
commit fa1e72ea3d
5 changed files with 75 additions and 1 deletions
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11
drivers/power/pmic/max77663.c
View file

@ -44,7 +44,16 @@ static int max77663_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
static int max77663_bind(struct udevice *dev)
{
ofnode regulators_node;
int children;
int children, ret;
if (IS_ENABLED(CONFIG_SYSRESET_MAX77663)) {
ret = device_bind_driver(dev, MAX77663_RST_DRIVER,
"sysreset", NULL);
if (ret) {
log_err("cannot bind SYSRESET (ret = %d)\n", ret);
return ret;
}
}
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {

7
drivers/sysreset/Kconfig
View file

@ -74,6 +74,13 @@ config SYSRESET_GPIO
example on Microblaze where reset logic can be controlled via GPIO
pin which triggers cpu reset.
config SYSRESET_MAX77663
bool "Enable support for MAX77663 PMIC System Reset"
depends on DM_PMIC_MAX77663
select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
help
Enable system power management functions found in MAX77663 PMIC.
config SYSRESET_MICROBLAZE
bool "Enable support for Microblaze soft reset"
depends on MICROBLAZE

1
drivers/sysreset/Makefile
View file

@ -9,6 +9,7 @@ obj-$(CONFIG_ARCH_STI) += sysreset_sti.o
obj-$(CONFIG_SANDBOX) += sysreset_sandbox.o
obj-$(CONFIG_POWEROFF_GPIO) += poweroff_gpio.o
obj-$(CONFIG_SYSRESET_GPIO) += sysreset_gpio.o
obj-$(CONFIG_$(SPL_TPL_)SYSRESET_MAX77663) += sysreset_max77663.o
obj-$(CONFIG_SYSRESET_MPC83XX) += sysreset_mpc83xx.o
obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o
obj-$(CONFIG_SYSRESET_OCTEON) += sysreset_octeon.o

52
drivers/sysreset/sysreset_max77663.c Normal file
View file

@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
*/
#include <dm.h>
#include <i2c.h>
#include <errno.h>
#include <sysreset.h>
#include <power/pmic.h>
#include <power/max77663.h>
static int max77663_sysreset_request(struct udevice *dev,
enum sysreset_t type)
{
int val;
val = pmic_reg_read(dev->parent, MAX77663_REG_ONOFF_CFG1);
if (val < 0)
return val;
/* clear both bits */
val &= ~ONOFF_SFT_RST;
val &= ~ONOFF_PWR_OFF;
switch (type) {
case SYSRESET_POWER:
/* MAX77663: SFT_RST > ONOFF_CFG1 */
pmic_reg_write(dev->parent, MAX77663_REG_ONOFF_CFG1,
val | ONOFF_SFT_RST);
break;
case SYSRESET_POWER_OFF:
/* MAX77663: PWR_OFF > ONOFF_CFG1 */
pmic_reg_write(dev->parent, MAX77663_REG_ONOFF_CFG1,
val | ONOFF_PWR_OFF);
break;
default:
return -EPROTONOSUPPORT;
}
return -EINPROGRESS;
}
static struct sysreset_ops max77663_sysreset = {
.request = max77663_sysreset_request,
};
U_BOOT_DRIVER(sysreset_max77663) = {
.id = UCLASS_SYSRESET,
.name = MAX77663_RST_DRIVER,
.ops = &max77663_sysreset,
};

5
include/power/max77663.h
View file

@ -12,6 +12,7 @@
/* Drivers name */
#define MAX77663_LDO_DRIVER "max77663_ldo"
#define MAX77663_SD_DRIVER "max77663_sd"
#define MAX77663_RST_DRIVER "max77663_rst"
/* Step-Down (SD) Regulator calculations */
#define SD_STATUS_MASK 0x30
@ -39,4 +40,8 @@
#define LDO_VOLT_BASE 800000
#define MAX77663_REG_ONOFF_CFG1 0x41
#define ONOFF_SFT_RST BIT(7)
#define ONOFF_PWR_OFF BIT(1)
#endif /* _MAX77663_H_ */