int pinconf_generic_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np, struct pinctrl_map **map,
unsigned *reserved_maps, unsigned *num_maps,
enum pinctrl_map_type type)
{
int ret;
const char *function;
struct device *dev = pctldev->dev;
unsigned long *configs = NULL;
unsigned num_configs = 0;
unsigned reserve, strings_count;
struct property *prop;
const char *group;
const char *subnode_target_type = "pins";
ret = of_property_count_strings(np, "pins");
if (ret < 0) {
ret = of_property_count_strings(np, "groups");
if (ret < 0)
/* skip this node; may contain config child nodes */
return 0;
if (type == PIN_MAP_TYPE_INVALID)
type = PIN_MAP_TYPE_CONFIGS_GROUP;
subnode_target_type = "groups";
} else {
if (type == PIN_MAP_TYPE_INVALID)
type = PIN_MAP_TYPE_CONFIGS_PIN;
}
strings_count = ret;
ret = of_property_read_string(np, "function", &function);
if (ret < 0) {
/* EINVAL=missing, which is fine since it's optional */
if (ret != -EINVAL)
dev_err(dev, "%pOF: could not parse property function\n",
np);
function = NULL;
}
ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
&num_configs);
if (ret < 0) {
dev_err(dev, "%pOF: could not parse node property\n", np);
return ret;
}
reserve = 0;
if (function != NULL)
reserve++;
if (num_configs)
reserve++;
reserve *= strings_count;
ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps,
num_maps, reserve);
if (ret < 0)
goto exit;
of_property_for_each_string(np, subnode_target_type, prop, group) {
if (function) {
ret = pinctrl_utils_add_map_mux(pctldev, map,
reserved_maps, num_maps, group,
function);
if (ret < 0)
goto exit;
}
if (num_configs) {
ret = pinctrl_utils_add_map_configs(pctldev, map,
reserved_maps, num_maps, group, configs,
num_configs, type);
if (ret < 0)
goto exit;
}
}
ret = 0;
exit:
kfree(configs);
return ret;
}
static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *node,
struct pinctrl_map **map,
unsigned *reserved_maps,
unsigned *num_maps)
{
struct property *pins;
u32 pinfunc, pin, func;
int num_pins, num_funcs, maps_per_pin;
unsigned long *configs;
unsigned int num_configs;
bool has_config = 0;
int i, err;
unsigned reserve = 0;
struct mtk_pinctrl_group *grp;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
pins = of_find_property(node, "pinmux", NULL);
if (!pins) {
dev_err(pctl->dev, "missing pins property in node %s .\n",
node->name);
return -EINVAL;
}
err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
&num_configs);
if (num_configs)
has_config = 1;
num_pins = pins->length / sizeof(u32);
num_funcs = num_pins;
maps_per_pin = 0;
if (num_funcs)
maps_per_pin++;
if (has_config && num_pins >= 1)
maps_per_pin++;
if (!num_pins || !maps_per_pin)
return -EINVAL;
reserve = num_pins * maps_per_pin;
err = pinctrl_utils_reserve_map(pctldev, map,
reserved_maps, num_maps, reserve);
if (err < 0)
goto fail;
for (i = 0; i < num_pins; i++) {
err = of_property_read_u32_index(node, "pinmux",
i, &pinfunc);
if (err)
goto fail;
pin = MTK_GET_PIN_NO(pinfunc);
func = MTK_GET_PIN_FUNC(pinfunc);
if (pin >= pctl->devdata->npins ||
func >= ARRAY_SIZE(mtk_gpio_functions)) {
dev_err(pctl->dev, "invalid pins value.\n");
err = -EINVAL;
goto fail;
}
grp = mtk_pctrl_find_group_by_pin(pctl, pin);
if (!grp) {
dev_err(pctl->dev, "unable to match pin %d to group\n",
pin);
return -EINVAL;
}
err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
reserved_maps, num_maps);
if (err < 0)
goto fail;
if (has_config) {
err = pinctrl_utils_add_map_configs(pctldev, map,
reserved_maps, num_maps, grp->name,
configs, num_configs,
PIN_MAP_TYPE_CONFIGS_GROUP);
if (err < 0)
goto fail;
}
}
return 0;
fail:
return err;
}
static int sprd_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned int *num_maps)
{
struct sprd_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
const struct sprd_pin_group *grp;
unsigned long *configs = NULL;
unsigned int num_configs = 0;
unsigned int reserved_maps = 0;
unsigned int reserve = 0;
const char *function;
enum pinctrl_map_type type;
int ret;
grp = sprd_pinctrl_find_group_by_name(pctl, np->name);
if (!grp) {
dev_err(pctl->dev, "unable to find group for node %s\n",
of_node_full_name(np));
return -EINVAL;
}
ret = of_property_count_strings(np, "pins");
if (ret < 0)
return ret;
if (ret == 1)
type = PIN_MAP_TYPE_CONFIGS_PIN;
else
type = PIN_MAP_TYPE_CONFIGS_GROUP;
ret = of_property_read_string(np, "function", &function);
if (ret < 0) {
if (ret != -EINVAL)
dev_err(pctl->dev,
"%s: could not parse property function\n",
of_node_full_name(np));
function = NULL;
}
ret = pinconf_generic_parse_dt_config(np, pctldev, &configs,
&num_configs);
if (ret < 0) {
dev_err(pctl->dev, "%s: could not parse node property\n",
of_node_full_name(np));
return ret;
}
*map = NULL;
*num_maps = 0;
if (function != NULL)
reserve++;
if (num_configs)
reserve++;
ret = pinctrl_utils_reserve_map(pctldev, map, &reserved_maps,
num_maps, reserve);
if (ret < 0)
goto out;
if (function) {
ret = pinctrl_utils_add_map_mux(pctldev, map,
&reserved_maps, num_maps,
grp->name, function);
if (ret < 0)
goto out;
}
if (num_configs) {
const char *group_or_pin;
unsigned int pin_id;
if (type == PIN_MAP_TYPE_CONFIGS_PIN) {
pin_id = grp->pins[0];
group_or_pin = pin_get_name(pctldev, pin_id);
} else {
group_or_pin = grp->name;
}
ret = pinctrl_utils_add_map_configs(pctldev, map,
&reserved_maps, num_maps,
group_or_pin, configs,
num_configs, type);
}
out:
kfree(configs);
return ret;
}