power: Add base support for the RK808 PMIC

This Rockchip PMIC provides features suitable for battery-powered
applications. It is commonly used with Rockchip SoCs.

Add a driver which provides register access. The regulator driver will use
this.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-01-21 19:43:29 -07:00
parent 61101e0583
commit 2a4febfd91
4 changed files with 183 additions and 0 deletions

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@ -33,6 +33,15 @@ config DM_PMIC_MAX77686
This config enables implementation of driver-model pmic uclass features
for PMIC MAX77686. The driver implements read/write operations.
config PMIC_RK808
bool "Enable support for Rockchip PMIC RK808"
depends on DM_PMIC
---help---
The Rockchip RK808 PMIC provides four buck DC-DC convertors, 8 LDOs,
an RTC and two low Rds (resistance (drain to source)) switches. It is
accessed via an I2C interface. The device is used with Rockchip SoCs.
This driver implements register read/write operations.
config PMIC_S2MPS11
bool "Enable Driver Model for PMIC Samsung S2MPS11"
depends on DM_PMIC

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@ -11,6 +11,7 @@ obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze100.o
obj-$(CONFIG_PMIC_S2MPS11) += s2mps11.o
obj-$(CONFIG_DM_PMIC_SANDBOX) += sandbox.o i2c_pmic_emul.o
obj-$(CONFIG_PMIC_ACT8846) += act8846.o
obj-$(CONFIG_PMIC_RK808) += rk808.o
obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o

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@ -0,0 +1,96 @@
/*
* 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/rk808_pmic.h>
#include <power/pmic.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "DCDC_REG", .driver = "rk808_buck"},
{ .prefix = "LDO_REG", .driver = "rk808_ldo"},
{ .prefix = "SWITCH_REG", .driver = "rk808_switch"},
{ },
};
static int rk808_reg_count(struct udevice *dev)
{
return RK808_NUM_OF_REGS;
}
static int rk808_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 rk808_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;
}
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
static int rk808_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;
}
#endif
static struct dm_pmic_ops rk808_ops = {
.reg_count = rk808_reg_count,
.read = rk808_read,
.write = rk808_write,
};
static const struct udevice_id rk808_ids[] = {
{ .compatible = "rockchip,rk808" },
{ }
};
U_BOOT_DRIVER(pmic_rk808) = {
.name = "rk808 pmic",
.id = UCLASS_PMIC,
.of_match = rk808_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
.bind = rk808_bind,
#endif
.ops = &rk808_ops,
};

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@ -0,0 +1,77 @@
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _PMIC_RK808_H_
#define _PMIC_RK808_H_
enum {
REG_DCDC_EN = 0x23,
REG_LDO_EN,
REG_SLEEP_SET_OFF1,
REG_SLEEP_SET_OFF2,
REG_DCDC_UV_STS,
REG_DCDC_UV_ACT,
REG_LDO_UV_STS,
REG_LDO_UV_ACT,
REG_DCDC_PG,
REG_LDO_PG,
REG_VOUT_MON_TDB,
REG_BUCK1_CONFIG,
REG_BUCK1_ON_VSEL,
REG_BUCK1_SLP_VSEL,
REG_BUCK1_DVS_VSEL,
REG_BUCK2_CONFIG,
REG_BUCK2_ON_VSEL,
REG_BUCK2_SLP_VSEL,
REG_BUCK2_DVS_VSEL,
REG_BUCK3_CONFIG,
REG_BUCK4_CONFIG,
REG_BUCK4_ON_VSEL,
REG_BUCK4_SLP_VSEL,
LDO1_ON_VSEL = 0x3b,
LDO1_SLP_VSEL,
LDO2_ON_VSEL,
LDO2_SLP_VSEL,
LDO3_ON_VSEL,
LDO3_SLP_VSEL,
LDO4_ON_VSEL,
LDO4_SLP_VSEL,
LDO5_ON_VSEL,
LDO5_SLP_VSEL,
LDO6_ON_VSEL,
LDO6_SLP_VSEL,
LDO7_ON_VSEL,
LDO7_SLP_VSEL,
LDO8_ON_VSEL,
LDO8_SLP_VSEL,
DEVCTRL,
INT_STS1,
INT_STS_MSK1,
INT_STS2,
INT_STS_MSK2,
IO_POL,
/* Not sure what this does */
DCDC_ILMAX = 0x90,
RK808_NUM_OF_REGS,
};
struct rk808_reg_table {
char *name;
u8 reg_ctl;
u8 reg_vol;
};
int rk808_spl_configure_buck(struct udevice *pmic, int buck, int uvolt);
#endif