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 <clamo...@gmail.com>
---
drivers/power/pmic/max77663.c | 12 ++++++-
drivers/sysreset/Kconfig | 7 ++++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_max77663.c | 53 ++++++++++++++++++++++++++++
include/power/max77663.h | 5 +++
5 files changed, 77 insertions(+), 1 deletion(-)
create mode 100644 drivers/sysreset/sysreset_max77663.c
diff --git a/drivers/power/pmic/max77663.c b/drivers/power/pmic/max77663.c
index 4070235d3c..e333c8dcf5 100644
--- a/drivers/power/pmic/max77663.c
+++ b/drivers/power/pmic/max77663.c
@@ -9,6 +9,7 @@
#include <dm.h>
#include <i2c.h>
#include <log.h>
+#include <dm/lists.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/max77663.h>
@@ -49,7 +50,16 @@ 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)) {
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index eab556c349..bc35896101 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -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
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index a9ac123754..c31f51c581 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -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
diff --git a/drivers/sysreset/sysreset_max77663.c
b/drivers/sysreset/sysreset_max77663.c
new file mode 100644
index 0000000000..4a2a2275df
--- /dev/null
+++ b/drivers/sysreset/sysreset_max77663.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2023 Svyatoslav Ryhel <clamo...@gmail.com>
+ */
+
+#include <common.h>
+#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,
+};
diff --git a/include/power/max77663.h b/include/power/max77663.h
index 0f764bcbcc..b3ae3dabf4 100644
--- a/include/power/max77663.h
+++ b/include/power/max77663.h
@@ -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_ */
--
2.39.2
