PALMAS PMIC family 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/palmas.c | 33 +++++++++++++++++--
drivers/sysreset/Kconfig | 7 ++++
drivers/sysreset/Makefile | 1 +
drivers/sysreset/sysreset_palmas.c | 53 ++++++++++++++++++++++++++++++
include/power/palmas.h | 11 +++++++
5 files changed, 103 insertions(+), 2 deletions(-)
create mode 100644 drivers/sysreset/sysreset_palmas.c
diff --git a/drivers/power/pmic/palmas.c b/drivers/power/pmic/palmas.c
index d6eb9cb433..eaa323ef8f 100644
--- a/drivers/power/pmic/palmas.c
+++ b/drivers/power/pmic/palmas.c
@@ -10,10 +10,10 @@
#include <dm.h>
#include <i2c.h>
#include <log.h>
+#include <dm/lists.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/palmas.h>
-#include <dm/device.h>
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
@@ -46,7 +46,16 @@ static int palmas_bind(struct udevice *dev)
{
ofnode pmic_node = ofnode_null(), regulators_node;
ofnode subnode;
- int children;
+ int children, ret;
+
+ if (IS_ENABLED(CONFIG_SYSRESET_PALMAS)) {
+ ret = device_bind_driver(dev, PALMAS_RST_DRIVER,
+ "sysreset", NULL);
+ if (ret) {
+ log_err("cannot bind SYSRESET (ret = %d)\n", ret);
+ return ret;
+ }
+ }
dev_for_each_subnode(subnode, dev) {
const char *name;
@@ -80,6 +89,24 @@ static int palmas_bind(struct udevice *dev)
return 0;
}
+static int palmas_probe(struct udevice *dev)
+{
+ struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
+ struct palmas_priv *priv = dev_get_priv(dev);
+ struct udevice *bus = dev_get_parent(dev);
+ u32 chip2_addr = chip->chip_addr + 1;
+ int ret;
+
+ /* Palmas PMIC is multi chip and chips are located in a row */
+ ret = i2c_get_chip(bus, chip2_addr, 1, &priv->chip2);
+ if (ret) {
+ log_err("cannot get second PMIC I2C chip (err %d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
static struct dm_pmic_ops palmas_ops = {
.read = palmas_read,
.write = palmas_write,
@@ -97,5 +124,7 @@ U_BOOT_DRIVER(pmic_palmas) = {
.id = UCLASS_PMIC,
.of_match = palmas_ids,
.bind = palmas_bind,
+ .probe = palmas_probe,
.ops = &palmas_ops,
+ .priv_auto = sizeof(struct palmas_priv),
};
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index 659170d156..0e52f99628 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -109,6 +109,13 @@ config SYSRESET_SPL_AT91
This enables the system reset driver support for Microchip/Atmel
SoCs in SPL.
+config SYSRESET_PALMAS
+ bool "Enable support for PALMAS System Reset"
+ depends on PMIC_PALMAS
+ select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
+ help
+ Enable system power management functions found in PLAMAS PMIC family.
+
config SYSRESET_PSCI
bool "Enable support for PSCI System Reset"
depends on ARM_PSCI_FW
diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile
index 0d96a204a9..c9f1c625ae 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_$(SPL_TPL_)SYSRESET_MAX77663) +=
sysreset_max77663.o
obj-$(CONFIG_SYSRESET_MPC83XX) += sysreset_mpc83xx.o
obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o
obj-$(CONFIG_SYSRESET_OCTEON) += sysreset_octeon.o
+obj-$(CONFIG_$(SPL_TPL_)SYSRESET_PALMAS) += sysreset_palmas.o
obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
obj-$(CONFIG_SYSRESET_SBI) += sysreset_sbi.o
obj-$(CONFIG_SYSRESET_SOCFPGA) += sysreset_socfpga.o
diff --git a/drivers/sysreset/sysreset_palmas.c
b/drivers/sysreset/sysreset_palmas.c
new file mode 100644
index 0000000000..d853c33504
--- /dev/null
+++ b/drivers/sysreset/sysreset_palmas.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/palmas.h>
+
+static int palmas_sysreset_request(struct udevice *dev,
+ enum sysreset_t type)
+{
+ struct palmas_priv *priv = dev_get_priv(dev->parent);
+ int ret;
+
+ /*
+ * Mask INT3 on second page which detects vbus
+ * or device will immediately turn on.
+ */
+ ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_INT3_MASK,
+ MASK_VBUS, MASK_VBUS);
+ if (ret < 0)
+ return ret;
+
+ switch (type) {
+ case SYSRESET_POWER:
+ /* PALMAS: SW_RST > DEV_CTRL */
+ pmic_reg_write(dev->parent, PALMAS_DEV_CTRL, SW_RST);
+ break;
+ case SYSRESET_POWER_OFF:
+ /* PALMAS: DEV_OFF > DEV_CTRL */
+ pmic_reg_write(dev->parent, PALMAS_DEV_CTRL, DEV_OFF);
+ break;
+ default:
+ return -EPROTONOSUPPORT;
+ }
+
+ return -EINPROGRESS;
+}
+
+static struct sysreset_ops palmas_sysreset = {
+ .request = palmas_sysreset_request,
+};
+
+U_BOOT_DRIVER(sysreset_palmas) = {
+ .id = UCLASS_SYSRESET,
+ .name = PALMAS_RST_DRIVER,
+ .ops = &palmas_sysreset,
+};
diff --git a/include/power/palmas.h b/include/power/palmas.h
index df5f15c5bd..0a612052f0 100644
--- a/include/power/palmas.h
+++ b/include/power/palmas.h
@@ -2,6 +2,10 @@
#define TPS659038 0x1
#define TPS65917 0x2
+struct palmas_priv {
+ struct udevice *chip2;
+};
+
/* I2C device address for pmic palmas */
#define PALMAS_I2C_ADDR (0x12 >> 1)
#define PALMAS_LDO_NUM 11
@@ -10,6 +14,7 @@
/* Drivers name */
#define PALMAS_LDO_DRIVER "palmas_ldo"
#define PALMAS_SMPS_DRIVER "palmas_smps"
+#define PALMAS_RST_DRIVER "palmas_rst"
#define PALMAS_SMPS_VOLT_MASK 0x7F
#define PALMAS_SMPS_RANGE_MASK 0x80
@@ -24,3 +29,9 @@
#define PALMAS_LDO_MODE_MASK 0x1
#define PALMAS_LDO_STATUS_MASK 0x10
#define PALMAS_LDO_BYPASS_EN 0x40
+
+#define PALMAS_DEV_CTRL 0xA0
+#define SW_RST BIT(1)
+#define DEV_OFF 0x00
+#define PALMAS_INT3_MASK 0x1B
+#define MASK_VBUS BIT(7)
--
2.39.2
