pmic-uclass.c
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/*
* Copyright (C) 2014-2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <vsprintf.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
#include <dm/uclass-internal.h>
#include <power/pmic.h>
#include <linux/ctype.h>
DECLARE_GLOBAL_DATA_PTR;
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
int pmic_bind_children(struct udevice *pmic, ofnode parent,
const struct pmic_child_info *child_info)
{
const struct pmic_child_info *info;
struct driver *drv;
struct udevice *child;
const char *node_name;
const char *reg_name;
int bind_count = 0;
ofnode node;
int prefix_len;
int ret;
debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
dev_of_offset(pmic));
ofnode_for_each_subnode(node, parent) {
node_name = ofnode_get_name(node);
debug("* Found child node: '%s'\n", node_name);
child = NULL;
for (info = child_info; info->prefix && info->driver; info++) {
debug(" - compatible prefix: '%s'\n", info->prefix);
prefix_len = strlen(info->prefix);
if (strncmp(info->prefix, node_name, prefix_len)) {
reg_name = ofnode_read_string(node,
"regulator-name");
if (!reg_name)
continue;
if (strncmp(info->prefix, reg_name, prefix_len))
continue;
}
drv = lists_driver_lookup_name(info->driver);
if (!drv) {
debug(" - driver: '%s' not found!\n",
info->driver);
continue;
}
debug(" - found child driver: '%s'\n", drv->name);
ret = device_bind_with_driver_data(pmic, drv, node_name,
0, node, &child);
if (ret) {
debug(" - child binding error: %d\n", ret);
continue;
}
debug(" - bound child device: '%s'\n", child->name);
child->driver_data = trailing_strtol(node_name);
debug(" - set 'child->driver_data': %lu\n",
child->driver_data);
break;
}
if (child)
bind_count++;
else
debug(" - compatible prefix not found\n");
}
debug("Bound: %d children for PMIC: '%s'\n", bind_count, pmic->name);
return bind_count;
}
#endif
int pmic_get(const char *name, struct udevice **devp)
{
return uclass_get_device_by_name(UCLASS_PMIC, name, devp);
}
int pmic_reg_count(struct udevice *dev)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!ops || !ops->reg_count)
return -ENOSYS;
return ops->reg_count(dev);
}
int pmic_read(struct udevice *dev, uint reg, uint8_t *buffer, int len)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!buffer)
return -EFAULT;
if (!ops || !ops->read)
return -ENOSYS;
return ops->read(dev, reg, buffer, len);
}
int pmic_write(struct udevice *dev, uint reg, const uint8_t *buffer, int len)
{
const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
if (!buffer)
return -EFAULT;
if (!ops || !ops->write)
return -ENOSYS;
return ops->write(dev, reg, buffer, len);
}
int pmic_reg_read(struct udevice *dev, uint reg)
{
u8 byte;
int ret;
debug("%s: reg=%x", __func__, reg);
ret = pmic_read(dev, reg, &byte, 1);
debug(", value=%x, ret=%d\n", byte, ret);
return ret ? ret : byte;
}
int pmic_reg_write(struct udevice *dev, uint reg, uint value)
{
u8 byte = value;
int ret;
debug("%s: reg=%x, value=%x", __func__, reg, value);
ret = pmic_write(dev, reg, &byte, 1);
debug(", ret=%d\n", ret);
return ret;
}
int pmic_clrsetbits(struct udevice *dev, uint reg, uint clr, uint set)
{
u8 byte;
int ret;
ret = pmic_reg_read(dev, reg);
if (ret < 0)
return ret;
byte = (ret & ~clr) | set;
return pmic_reg_write(dev, reg, byte);
}
UCLASS_DRIVER(pmic) = {
.id = UCLASS_PMIC,
.name = "pmic",
};