/**
* 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;
}
/**
* pinctrl_select_state_simple() - simple implementation of pinctrl_select_state
*
* @dev: peripheral device
* @return: 0 on success, or negative error code on failure
*/
static int pinctrl_select_state_simple(struct udevice *dev)
{
struct udevice *pctldev;
struct pinctrl_ops *ops;
int ret;
/*
* For simplicity, assume the first device of PINCTRL uclass
* is the correct one. This is most likely OK as there is
* usually only one pinctrl device on the system.
*/
ret = uclass_get_device(UCLASS_PINCTRL, 0, &pctldev);
if (ret)
return ret;
ops = pinctrl_get_ops(pctldev);
if (!ops->set_state_simple) {
dev_dbg(dev, "set_state_simple op missing\n");
return -ENOSYS;
}
return ops->set_state_simple(pctldev, dev);
}
/**
* 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;
}
/**
* 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;
}
