mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
e160f7d430
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
171 lines
3.5 KiB
C
171 lines
3.5 KiB
C
/*
|
|
* 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, int offset,
|
|
const struct pmic_child_info *child_info)
|
|
{
|
|
const struct pmic_child_info *info;
|
|
const void *blob = gd->fdt_blob;
|
|
struct driver *drv;
|
|
struct udevice *child;
|
|
const char *node_name;
|
|
int bind_count = 0;
|
|
int node;
|
|
int prefix_len;
|
|
int ret;
|
|
|
|
debug("%s for '%s' at node offset: %d\n", __func__, pmic->name,
|
|
dev_of_offset(pmic));
|
|
|
|
for (node = fdt_first_subnode(blob, offset);
|
|
node > 0;
|
|
node = fdt_next_subnode(blob, node)) {
|
|
node_name = fdt_get_name(blob, node, NULL);
|
|
|
|
debug("* Found child node: '%s' at offset:%d\n", node_name,
|
|
node);
|
|
|
|
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))
|
|
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(pmic, drv, node_name, NULL,
|
|
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 childs 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",
|
|
};
|