Commit d2c88f7d authored by Simon Glass's avatar Simon Glass

power: Add support for ACT8846 PMIC

Add a driver for the ACT8846 PMIC. This supports several LDOs and BUCKs and
is connected to the I2C bus. This driver supports using a regulator driver
to access the regulators.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
parent 26ad30e9
......@@ -10,6 +10,15 @@ config DM_PMIC
- 'drivers/power/pmic/pmic-uclass.c'
- 'include/power/pmic.h'
config PMIC_ACT8846
bool "Enable support for the active-semi 8846 PMIC"
depends on DM_PMIC && DM_I2C
---help---
This PMIC includes 4 DC/DC step-down buck regulators and 8 low-dropout
regulators (LDOs). It also provides some GPIO, reset and battery
functions. It uses an I2C interface and is designed for use with
tablets and smartphones.
config DM_PMIC_PFUZE100
bool "Enable Driver Model for PMIC PFUZE100"
depends on DM_PMIC
......
......@@ -9,6 +9,7 @@ obj-$(CONFIG_DM_PMIC) += pmic-uclass.o
obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze100.o
obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
obj-$(CONFIG_PMIC_ACT8846) += act8846.o
obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
......
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <power/act8846_pmic.h>
#include <power/pmic.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "REG", .driver = "act8846_reg"},
{ },
};
static int act8846_reg_count(struct udevice *dev)
{
return ACT8846_NUM_OF_REGS;
}
static int act8846_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)
{
if (dm_i2c_write(dev, reg, buff, len)) {
debug("write error to device: %p register: %#x!", dev, reg);
return -EIO;
}
return 0;
}
static int act8846_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
if (dm_i2c_read(dev, reg, buff, len)) {
debug("read error from device: %p register: %#x!", dev, reg);
return -EIO;
}
return 0;
}
static int act8846_bind(struct udevice *dev)
{
const void *blob = gd->fdt_blob;
int regulators_node;
int children;
regulators_node = fdt_subnode_offset(blob, dev->of_offset,
"regulators");
if (regulators_node <= 0) {
debug("%s: %s regulators subnode not found!", __func__,
dev->name);
return -ENXIO;
}
debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
children = pmic_bind_children(dev, regulators_node, pmic_children_info);
if (!children)
debug("%s: %s - no child found\n", __func__, dev->name);
/* Always return success for this device */
return 0;
}
static struct dm_pmic_ops act8846_ops = {
.reg_count = act8846_reg_count,
.read = act8846_read,
.write = act8846_write,
};
static const struct udevice_id act8846_ids[] = {
{ .compatible = "active-semi,act8846" },
{ }
};
U_BOOT_DRIVER(pmic_act8846) = {
.name = "act8846 pmic",
.id = UCLASS_PMIC,
.of_match = act8846_ids,
.bind = act8846_bind,
.ops = &act8846_ops,
};
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _PMIC_ACT8846_H_
#define _PMIC_ACT8846_H_
#include <asm/gpio.h>
#define ACT8846_NUM_OF_REGS 12
#define BUCK_VOL_MASK 0x3f
#define LDO_VOL_MASK 0x3f
#define BUCK_EN_MASK 0x80
#define LDO_EN_MASK 0x80
#define VOL_MIN_IDX 0x00
#define VOL_MAX_IDX 0x3f
struct act8846_reg_table {
char *name;
char reg_ctl;
char reg_vol;
};
struct pmic_act8846 {
struct pmic *pmic;
int node; /*device tree node*/
struct gpio_desc pwr_hold;
struct udevice *dev;
};
#endif
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