power: pmic: Palmas: Add the base pmic support

Add support to bind the regulators/child nodes with the pmic.
Also adds the pmic i2c based read/write funtions to access pmic
registers.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Keerthy 2016-09-30 09:20:43 +05:30 committed by Simon Glass
parent 34514b8b9c
commit 33621d247e
4 changed files with 137 additions and 0 deletions

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@ -143,3 +143,10 @@ config PMIC_TPS65090
FETs and a battery charger. This driver provides register access
only, and you can enable the regulator/charger drivers separately if
required.
config PMIC_PALMAS
bool "Enable driver for Texas Instruments PALMAS PMIC"
depends on DM_PMIC
---help---
The PALMAS is a PMIC containing several LDOs, SMPS.
This driver binds the pmic children.

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@ -16,6 +16,7 @@ obj-$(CONFIG_PMIC_RK808) += rk808.o
obj-$(CONFIG_PMIC_RN5T567) += rn5t567.o
obj-$(CONFIG_PMIC_TPS65090) += tps65090.o
obj-$(CONFIG_PMIC_S5M8767) += s5m8767.o
obj-$(CONFIG_$(SPL_)PMIC_PALMAS) += palmas.o
obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
obj-$(CONFIG_POWER_MAX77696) += pmic_max77696.o

104
drivers/power/pmic/palmas.c Normal file
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@ -0,0 +1,104 @@
/*
* (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
* Keerthy <j-keerthy@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/palmas.h>
#include <dm/device.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
{ .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
{ },
};
static int palmas_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)
{
if (dm_i2c_write(dev, reg, buff, len)) {
error("write error to device: %p register: %#x!", dev, reg);
return -EIO;
}
return 0;
}
static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
if (dm_i2c_read(dev, reg, buff, len)) {
error("read error from device: %p register: %#x!", dev, reg);
return -EIO;
}
return 0;
}
static int palmas_bind(struct udevice *dev)
{
int pmic_node = -1, regulators_node;
const void *blob = gd->fdt_blob;
int children;
int node = dev->of_offset;
int subnode, len;
fdt_for_each_subnode(blob, subnode, node) {
const char *name;
char *temp;
name = fdt_get_name(blob, subnode, &len);
temp = strstr(name, "pmic");
if (temp) {
pmic_node = subnode;
break;
}
}
if (pmic_node <= 0) {
debug("%s: %s pmic subnode not found!", __func__, dev->name);
return -ENXIO;
}
regulators_node = fdt_subnode_offset(blob, pmic_node, "regulators");
if (regulators_node <= 0) {
debug("%s: %s reg subnode not found!", __func__, dev->name);
return -ENXIO;
}
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 palmas_ops = {
.read = palmas_read,
.write = palmas_write,
};
static const struct udevice_id palmas_ids[] = {
{ .compatible = "ti,tps659038", .data = TPS659038 },
{ .compatible = "ti,tps65917" , .data = TPS65917 },
{ }
};
U_BOOT_DRIVER(pmic_palmas) = {
.name = "palmas_pmic",
.id = UCLASS_PMIC,
.of_match = palmas_ids,
.bind = palmas_bind,
.ops = &palmas_ops,
};

25
include/power/palmas.h Normal file
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@ -0,0 +1,25 @@
#define PALMAS 0x0
#define TPS659038 0x1
#define TPS65917 0x2
/* I2C device address for pmic palmas */
#define PALMAS_I2C_ADDR (0x12 >> 1)
#define PALMAS_LDO_NUM 11
#define PALMAS_SMPS_NUM 8
/* Drivers name */
#define PALMAS_LDO_DRIVER "palmas_ldo"
#define PALMAS_SMPS_DRIVER "palmas_smps"
#define PALMAS_SMPS_VOLT_MASK 0x7F
#define PALMAS_SMPS_RANGE_MASK 0x80
#define PALMAS_SMPS_VOLT_MAX_HEX 0x7F
#define PALMAS_SMPS_VOLT_MAX 3300000
#define PALMAS_SMPS_MODE_MASK 0x3
#define PALMAS_SMPS_STATUS_MASK 0x30
#define PALMAS_LDO_VOLT_MASK 0x3F
#define PALMAS_LDO_VOLT_MAX_HEX 0x3F
#define PALMAS_LDO_VOLT_MAX 3300000
#define PALMAS_LDO_MODE_MASK 0x1
#define PALMAS_LDO_STATUS_MASK 0x10