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>master
parent
34514b8b9c
commit
33621d247e
@ -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, |
||||
}; |
@ -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 |
Loading…
Reference in new issue