91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
|
|
* 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!\n", 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!\n", 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(dev),
|
|
"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,
|
|
};
|