mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 02:33:07 +00:00
92 lines
2 KiB
C
92 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015 Google, Inc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <fdtdec.h>
|
|
#include <errno.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <log.h>
|
|
#include <power/pmic.h>
|
|
#include <power/regulator.h>
|
|
#include <power/s5m8767.h>
|
|
|
|
static const struct pmic_child_info pmic_children_info[] = {
|
|
{ .prefix = "LDO", .driver = S5M8767_LDO_DRIVER },
|
|
{ .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER },
|
|
{ },
|
|
};
|
|
|
|
static int s5m8767_reg_count(struct udevice *dev)
|
|
{
|
|
return S5M8767_NUM_OF_REGS;
|
|
}
|
|
|
|
static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff,
|
|
int len)
|
|
{
|
|
if (dm_i2c_write(dev, reg, buff, len)) {
|
|
pr_err("write error to device: %p register: %#x!\n", dev, reg);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
|
|
{
|
|
if (dm_i2c_read(dev, reg, buff, len)) {
|
|
pr_err("read error from device: %p register: %#x!\n", dev, reg);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int s5m8767_enable_32khz_cp(struct udevice *dev)
|
|
{
|
|
return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1);
|
|
}
|
|
|
|
static int s5m8767_bind(struct udevice *dev)
|
|
{
|
|
int children;
|
|
ofnode node;
|
|
|
|
node = dev_read_subnode(dev, "regulators");
|
|
if (!ofnode_valid(node)) {
|
|
debug("%s: %s regulators subnode not found!\n", __func__,
|
|
dev->name);
|
|
return -ENXIO;
|
|
}
|
|
|
|
debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
|
|
|
|
children = pmic_bind_children(dev, 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 s5m8767_ops = {
|
|
.reg_count = s5m8767_reg_count,
|
|
.read = s5m8767_read,
|
|
.write = s5m8767_write,
|
|
};
|
|
|
|
static const struct udevice_id s5m8767_ids[] = {
|
|
{ .compatible = "samsung,s5m8767-pmic" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pmic_s5m8767) = {
|
|
.name = "s5m8767_pmic",
|
|
.id = UCLASS_PMIC,
|
|
.of_match = s5m8767_ids,
|
|
.bind = s5m8767_bind,
|
|
.ops = &s5m8767_ops,
|
|
};
|