mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-24 04:34:22 +08:00
9d922450aa
This header includes things that are needed to make driver build. Adjust existing users to include that always, even if other dm/ includes are present Signed-off-by: Simon Glass <sjg@chromium.org>
362 lines
9.2 KiB
C
362 lines
9.2 KiB
C
/*
|
|
* Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <linux/compat.h>
|
|
#include <dm/pinctrl.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/**
|
|
* pinctrl_pin_name_to_selector() - return the pin selector for a pin
|
|
*
|
|
* @dev: pin controller device
|
|
* @pin: the pin name to look up
|
|
* @return: pin selector, or negative error code on failure
|
|
*/
|
|
static int pinctrl_pin_name_to_selector(struct udevice *dev, const char *pin)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
unsigned npins, selector;
|
|
|
|
if (!ops->get_pins_count || !ops->get_pin_name) {
|
|
dev_dbg(dev, "get_pins_count or get_pin_name missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
npins = ops->get_pins_count(dev);
|
|
|
|
/* See if this pctldev has this pin */
|
|
for (selector = 0; selector < npins; selector++) {
|
|
const char *pname = ops->get_pin_name(dev, selector);
|
|
|
|
if (!strcmp(pin, pname))
|
|
return selector;
|
|
}
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/**
|
|
* pinctrl_group_name_to_selector() - return the group selector for a group
|
|
*
|
|
* @dev: pin controller device
|
|
* @group: the pin group name to look up
|
|
* @return: pin group selector, or negative error code on failure
|
|
*/
|
|
static int pinctrl_group_name_to_selector(struct udevice *dev,
|
|
const char *group)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
unsigned ngroups, selector;
|
|
|
|
if (!ops->get_groups_count || !ops->get_group_name) {
|
|
dev_dbg(dev, "get_groups_count or get_group_name missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
ngroups = ops->get_groups_count(dev);
|
|
|
|
/* See if this pctldev has this group */
|
|
for (selector = 0; selector < ngroups; selector++) {
|
|
const char *gname = ops->get_group_name(dev, selector);
|
|
|
|
if (!strcmp(group, gname))
|
|
return selector;
|
|
}
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
#if CONFIG_IS_ENABLED(PINMUX)
|
|
/**
|
|
* pinmux_func_name_to_selector() - return the function selector for a function
|
|
*
|
|
* @dev: pin controller device
|
|
* @function: the function name to look up
|
|
* @return: function selector, or negative error code on failure
|
|
*/
|
|
static int pinmux_func_name_to_selector(struct udevice *dev,
|
|
const char *function)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
unsigned nfuncs, selector = 0;
|
|
|
|
if (!ops->get_functions_count || !ops->get_function_name) {
|
|
dev_dbg(dev,
|
|
"get_functions_count or get_function_name missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
nfuncs = ops->get_functions_count(dev);
|
|
|
|
/* See if this pctldev has this function */
|
|
for (selector = 0; selector < nfuncs; selector++) {
|
|
const char *fname = ops->get_function_name(dev, selector);
|
|
|
|
if (!strcmp(function, fname))
|
|
return selector;
|
|
}
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/**
|
|
* pinmux_enable_setting() - enable pin-mux setting for a certain pin/group
|
|
*
|
|
* @dev: pin controller device
|
|
* @is_group: target of operation (true: pin group, false: pin)
|
|
* @selector: pin selector or group selector, depending on @is_group
|
|
* @func_selector: function selector
|
|
* @return: 0 on success, or negative error code on failure
|
|
*/
|
|
static int pinmux_enable_setting(struct udevice *dev, bool is_group,
|
|
unsigned selector, unsigned func_selector)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
|
|
if (is_group) {
|
|
if (!ops->pinmux_group_set) {
|
|
dev_dbg(dev, "pinmux_group_set op missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return ops->pinmux_group_set(dev, selector, func_selector);
|
|
} else {
|
|
if (!ops->pinmux_set) {
|
|
dev_dbg(dev, "pinmux_set op missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
return ops->pinmux_set(dev, selector, func_selector);
|
|
}
|
|
}
|
|
#else
|
|
static int pinmux_func_name_to_selector(struct udevice *dev,
|
|
const char *function)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int pinmux_enable_setting(struct udevice *dev, bool is_group,
|
|
unsigned selector, unsigned func_selector)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#if CONFIG_IS_ENABLED(PINCONF)
|
|
/**
|
|
* pinconf_prop_name_to_param() - return parameter ID for a property name
|
|
*
|
|
* @dev: pin controller device
|
|
* @property: property name in DTS, such as "bias-pull-up", "slew-rate", etc.
|
|
* @default_value: return default value in case no value is specified in DTS
|
|
* @return: return pamater ID, or negative error code on failure
|
|
*/
|
|
static int pinconf_prop_name_to_param(struct udevice *dev,
|
|
const char *property, u32 *default_value)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
const struct pinconf_param *p, *end;
|
|
|
|
if (!ops->pinconf_num_params || !ops->pinconf_params) {
|
|
dev_dbg(dev, "pinconf_num_params or pinconf_params missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
p = ops->pinconf_params;
|
|
end = p + ops->pinconf_num_params;
|
|
|
|
/* See if this pctldev supports this parameter */
|
|
for (; p < end; p++) {
|
|
if (!strcmp(property, p->property)) {
|
|
*default_value = p->default_value;
|
|
return p->param;
|
|
}
|
|
}
|
|
|
|
return -ENOSYS;
|
|
}
|
|
|
|
/**
|
|
* pinconf_enable_setting() - apply pin configuration for a certain pin/group
|
|
*
|
|
* @dev: pin controller device
|
|
* @is_group: target of operation (true: pin group, false: pin)
|
|
* @selector: pin selector or group selector, depending on @is_group
|
|
* @param: configuration paramter
|
|
* @argument: argument taken by some configuration parameters
|
|
* @return: 0 on success, or negative error code on failure
|
|
*/
|
|
static int pinconf_enable_setting(struct udevice *dev, bool is_group,
|
|
unsigned selector, unsigned param,
|
|
u32 argument)
|
|
{
|
|
const struct pinctrl_ops *ops = pinctrl_get_ops(dev);
|
|
|
|
if (is_group) {
|
|
if (!ops->pinconf_group_set) {
|
|
dev_dbg(dev, "pinconf_group_set op missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return ops->pinconf_group_set(dev, selector, param,
|
|
argument);
|
|
} else {
|
|
if (!ops->pinconf_set) {
|
|
dev_dbg(dev, "pinconf_set op missing\n");
|
|
return -ENOSYS;
|
|
}
|
|
return ops->pinconf_set(dev, selector, param, argument);
|
|
}
|
|
}
|
|
#else
|
|
static int pinconf_prop_name_to_param(struct udevice *dev,
|
|
const char *property, u32 *default_value)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int pinconf_enable_setting(struct udevice *dev, bool is_group,
|
|
unsigned selector, unsigned param,
|
|
u32 argument)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* pinctrl_generic_set_state_one() - set state for a certain pin/group
|
|
* Apply all pin multiplexing and pin configurations specified by @config
|
|
* for a given pin or pin group.
|
|
*
|
|
* @dev: pin controller device
|
|
* @config: pseudo device pointing to config node
|
|
* @is_group: target of operation (true: pin group, false: pin)
|
|
* @selector: pin selector or group selector, depending on @is_group
|
|
* @return: 0 on success, or negative error code on failure
|
|
*/
|
|
static int pinctrl_generic_set_state_one(struct udevice *dev,
|
|
struct udevice *config,
|
|
bool is_group, unsigned selector)
|
|
{
|
|
const void *fdt = gd->fdt_blob;
|
|
int node_offset = dev_of_offset(config);
|
|
const char *propname;
|
|
const void *value;
|
|
int prop_offset, len, func_selector, param, ret;
|
|
u32 arg, default_val;
|
|
|
|
for (prop_offset = fdt_first_property_offset(fdt, node_offset);
|
|
prop_offset > 0;
|
|
prop_offset = fdt_next_property_offset(fdt, prop_offset)) {
|
|
value = fdt_getprop_by_offset(fdt, prop_offset,
|
|
&propname, &len);
|
|
if (!value)
|
|
return -EINVAL;
|
|
|
|
if (!strcmp(propname, "function")) {
|
|
func_selector = pinmux_func_name_to_selector(dev,
|
|
value);
|
|
if (func_selector < 0)
|
|
return func_selector;
|
|
ret = pinmux_enable_setting(dev, is_group,
|
|
selector,
|
|
func_selector);
|
|
} else {
|
|
param = pinconf_prop_name_to_param(dev, propname,
|
|
&default_val);
|
|
if (param < 0)
|
|
continue; /* just skip unknown properties */
|
|
|
|
if (len >= sizeof(fdt32_t))
|
|
arg = fdt32_to_cpu(*(fdt32_t *)value);
|
|
else
|
|
arg = default_val;
|
|
|
|
ret = pinconf_enable_setting(dev, is_group,
|
|
selector, param, arg);
|
|
}
|
|
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pinctrl_generic_set_state_subnode() - apply all settings in config node
|
|
*
|
|
* @dev: pin controller device
|
|
* @config: pseudo device pointing to config node
|
|
* @return: 0 on success, or negative error code on failure
|
|
*/
|
|
static int pinctrl_generic_set_state_subnode(struct udevice *dev,
|
|
struct udevice *config)
|
|
{
|
|
const void *fdt = gd->fdt_blob;
|
|
int node = dev_of_offset(config);
|
|
const char *subnode_target_type = "pins";
|
|
bool is_group = false;
|
|
const char *name;
|
|
int strings_count, selector, i, ret;
|
|
|
|
strings_count = fdt_stringlist_count(fdt, node, subnode_target_type);
|
|
if (strings_count < 0) {
|
|
subnode_target_type = "groups";
|
|
is_group = true;
|
|
strings_count = fdt_stringlist_count(fdt, node,
|
|
subnode_target_type);
|
|
if (strings_count < 0) {
|
|
/* skip this node; may contain config child nodes */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < strings_count; i++) {
|
|
name = fdt_stringlist_get(fdt, node, subnode_target_type, i,
|
|
NULL);
|
|
if (!name)
|
|
return -EINVAL;
|
|
|
|
if (is_group)
|
|
selector = pinctrl_group_name_to_selector(dev, name);
|
|
else
|
|
selector = pinctrl_pin_name_to_selector(dev, name);
|
|
if (selector < 0)
|
|
return selector;
|
|
|
|
ret = pinctrl_generic_set_state_one(dev, config,
|
|
is_group, selector);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pinctrl_generic_set_state(struct udevice *dev, struct udevice *config)
|
|
{
|
|
struct udevice *child;
|
|
int ret;
|
|
|
|
ret = pinctrl_generic_set_state_subnode(dev, config);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for (device_find_first_child(config, &child);
|
|
child;
|
|
device_find_next_child(&child)) {
|
|
ret = pinctrl_generic_set_state_subnode(dev, child);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|