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/* $OpenBSD: ofw_pinctrl.c,v 1.3 2020/06/06 16:59:43 patrick Exp $ */
/*
* Copyright (c) 2016 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_pinctrl.h>
struct pinctrl {
int pc_phandle;
int (*pc_pinctrl)(uint32_t, void *);
void *pc_cookie;
LIST_ENTRY(pinctrl) pc_list;
};
void pinctrl_register_child(int, int (*)(uint32_t, void *), void *);
LIST_HEAD(, pinctrl) pinctrls = LIST_HEAD_INITIALIZER(pinctrl);
void
pinctrl_register(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
{
for (node = OF_child(node); node; node = OF_peer(node))
pinctrl_register_child(node, pinctrl, cookie);
}
void
pinctrl_register_child(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
{
struct pinctrl *pc;
uint32_t phandle;
phandle = OF_getpropint(node, "phandle", 0);
if (phandle) {
pc = malloc(sizeof(struct pinctrl), M_DEVBUF, M_WAITOK);
pc->pc_phandle = phandle;
pc->pc_pinctrl = pinctrl;
pc->pc_cookie = cookie;
LIST_INSERT_HEAD(&pinctrls, pc, pc_list);
}
for (node = OF_child(node); node; node = OF_peer(node))
pinctrl_register_child(node, pinctrl, cookie);
}
int
pinctrl_byphandle(uint32_t phandle)
{
struct pinctrl *pc;
if (phandle == 0)
return -1;
LIST_FOREACH(pc, &pinctrls, pc_list) {
if (pc->pc_phandle == phandle)
return pc->pc_pinctrl(pc->pc_phandle, pc->pc_cookie);
}
return -1;
}
int
pinctrl_byid(int node, int id)
{
char pinctrl[32];
uint32_t *phandles;
int len, i;
snprintf(pinctrl, sizeof(pinctrl), "pinctrl-%d", id);
len = OF_getproplen(node, pinctrl);
if (len <= 0)
return -1;
phandles = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(node, pinctrl, phandles, len);
for (i = 0; i < len / sizeof(uint32_t); i++)
pinctrl_byphandle(phandles[i]);
free(phandles, M_TEMP, len);
return 0;
}
int
pinctrl_byname(int node, const char *config)
{
int id;
id = OF_getindex(node, config, "pinctrl-names");
if (id < 0)
return -1;
return pinctrl_byid(node, id);
}
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