// SPDX-License-Identifier: GPL-2.0
/*
* SuperH Pin Function Controller pinmux support.
*
* Copyright (C) 2012 Paul Mundt
*/
#define DRV_NAME "sh-pfc"
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "core.h"
#include "../core.h"
#include "../pinconf.h"
struct sh_pfc_pin_config {
u16 gpio_enabled:1;
u16 mux_mark:15;
};
struct sh_pfc_pinctrl {
struct pinctrl_dev *pctl;
struct pinctrl_desc pctl_desc;
struct sh_pfc *pfc;
struct pinctrl_pin_desc *pins;
struct sh_pfc_pin_config *configs;
const char *func_prop_name;
const char *groups_prop_name;
const char *pins_prop_name;
};
static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev)
{
struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
return pmx->pfc->info->nr_groups;
}
static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
return pmx->pfc->info->groups[selector].name;
}
static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
const unsigned **pins, unsigned *num_pins)
{
struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
*pins = pmx->pfc->info->groups[selector].pins;
*num_pins = pmx->pfc->info->groups[selector].nr_pins;
return 0;
}
static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned offset)
{
seq_puts(s, DRV_NAME);
}
#ifdef CONFIG_OF
static int sh_pfc_map_add_config(struct pinctrl_map *map,
const char *group_or_pin,
enum pinctrl_map_type type,
unsigned long *configs,
unsigned int num_configs)
{
unsigned long *cfgs;
cfgs = kmemdup(configs, num_configs * sizeof(*cfgs),
GFP_KERNEL);
if (cfgs == NULL)
return -ENOMEM;
map->type = type;
map->data.configs.group_or_pin = group_or_pin;
map->data.configs.configs = cfgs;
map->data.configs.num_configs = num_configs;
return 0;
}
static int sh_pfc_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned int *num_maps, unsigned int *index)
{
struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev);
struct device *dev = pmx->pfc->dev;
struct pinctrl_map *maps = *map;
unsigned int nmaps = *num_maps;
unsigned int idx = *index;
unsigned int num_configs;
const char *function = NULL;
unsigned long *configs;
struct property *prop;
unsigned int num_groups;
unsigned int num_pins;
const char *group;
const char *pin;
int ret;
/* Support both the old Renesas-specific properties and the new standard
* properties. Mixing old and new properties isn't allowed, neither
* inside a subnode nor across subnodes.
*/
if (!pmx->func_prop_name) {
if (of_find_property(np, "groups", NULL) ||
of_find_property(np, "pins", NULL)) {
pmx->func_prop_name = "function";
pmx->groups_prop_name = "groups";
pmx->pins_prop_name = "pins";
} else {
pmx->func_prop_name = "renesas,function";
pmx->groups_prop_name = "renesas,groups";
pmx->pins_prop_name = "renesas,pins";
}
}
/* Parse the function and configuration properties. At least a function
* or one configuration must be specified.
*/
ret = of_property_read_string(np, pmx->func_prop_name, &function);
if (ret < 0 && ret != -EINVAL) {
dev_err(dev, "Invalid function in DT\n");
return ret;
}
ret = pinconf_generic_parse_dt_config(np, NULL, &configs, &num_configs);
if (ret < 0)
return ret;
if (!function && num_configs == 0) {
dev_err(dev,
"DT node must contain at least a function or config\n");
ret = -ENODEV;
goto done;
}
/* Count the number of pins and groups and reallocate mappings. */
ret = of_property_count_strings(np, pmx->pins_prop_name);
if (ret == -EINVAL) {
num_pins = 0;
} else if (ret