mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
b62280745e
The RK805 are a Power Management IC (PMIC) for multimedia
and handheld devices. They contains the following components:
- Regulators(4*BUCKs, 3*LDOs)
- RTC
- Clocking
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <power/rk8xx_pmic.h>
|
|
#include <power/pmic.h>
|
|
|
|
static const struct pmic_child_info pmic_children_info[] = {
|
|
{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
|
|
{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
|
|
{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
|
|
{ },
|
|
};
|
|
|
|
static int rk8xx_reg_count(struct udevice *dev)
|
|
{
|
|
return RK808_NUM_OF_REGS;
|
|
}
|
|
|
|
static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
|
|
int len)
|
|
{
|
|
int ret;
|
|
|
|
ret = dm_i2c_write(dev, reg, buff, len);
|
|
if (ret) {
|
|
debug("write error to device: %p register: %#x!\n", dev, reg);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
|
|
{
|
|
int ret;
|
|
|
|
ret = dm_i2c_read(dev, reg, buff, len);
|
|
if (ret) {
|
|
debug("read error from device: %p register: %#x!\n", dev, reg);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
|
|
static int rk8xx_bind(struct udevice *dev)
|
|
{
|
|
ofnode regulators_node;
|
|
int children;
|
|
|
|
regulators_node = dev_read_subnode(dev, "regulators");
|
|
if (!ofnode_valid(regulators_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, 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;
|
|
}
|
|
#endif
|
|
|
|
static int rk8xx_probe(struct udevice *dev)
|
|
{
|
|
struct rk8xx_priv *priv = dev_get_priv(dev);
|
|
uint8_t msb, lsb;
|
|
|
|
/* read Chip variant */
|
|
rk8xx_read(dev, ID_MSB, &msb, 1);
|
|
rk8xx_read(dev, ID_LSB, &lsb, 1);
|
|
|
|
priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dm_pmic_ops rk8xx_ops = {
|
|
.reg_count = rk8xx_reg_count,
|
|
.read = rk8xx_read,
|
|
.write = rk8xx_write,
|
|
};
|
|
|
|
static const struct udevice_id rk8xx_ids[] = {
|
|
{ .compatible = "rockchip,rk805" },
|
|
{ .compatible = "rockchip,rk808" },
|
|
{ .compatible = "rockchip,rk816" },
|
|
{ .compatible = "rockchip,rk818" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pmic_rk8xx) = {
|
|
.name = "rk8xx pmic",
|
|
.id = UCLASS_PMIC,
|
|
.of_match = rk8xx_ids,
|
|
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
|
|
.bind = rk8xx_bind,
|
|
#endif
|
|
.priv_auto_alloc_size = sizeof(struct rk8xx_priv),
|
|
.probe = rk8xx_probe,
|
|
.ops = &rk8xx_ops,
|
|
};
|