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sysreset: implement PALMAS sysreset functions

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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 <clamor95@gmail.com>
This commit is contained in:
Svyatoslav Ryhel 2023-10-24 10:49:08 +03:00 committed by Tom Rini
parent 8b8a00eaf4
commit 4afdc7a3c6
5 changed files with 102 additions and 2 deletions
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33
drivers/power/pmic/palmas.c
View file

@ -8,13 +8,13 @@
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <dm/lists.h>
#include <i2c.h>
#include <log.h>
#include <linux/printk.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 },
@ -47,7 +47,16 @@ 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;
@ -81,6 +90,24 @@ 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,
@ -98,5 +125,7 @@ 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),
};

7
drivers/sysreset/Kconfig
View file

@ -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

1
drivers/sysreset/Makefile
View file

@ -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

52
drivers/sysreset/sysreset_palmas.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/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,
};

11
include/power/palmas.h
View file

@ -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)