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/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* Authors:
* Anup Patel <anup.patel@wdc.com>
*/
#include <sbi/sbi_error.h>
#include <sbi_utils/gpio/gpio.h>
#define GPIO_CHIP_MAX 16
static struct gpio_chip *gc_array[GPIO_CHIP_MAX];
struct gpio_chip *gpio_chip_find(unsigned int id)
{
unsigned int i;
struct gpio_chip *ret = NULL;
for (i = 0; i < GPIO_CHIP_MAX; i++) {
if (gc_array[i] && gc_array[i]->id == id) {
ret = gc_array[i];
break;
}
}
return ret;
}
int gpio_chip_add(struct gpio_chip *gc)
{
int i, ret = SBI_ENOSPC;
if (!gc)
return SBI_EINVAL;
if (gpio_chip_find(gc->id))
return SBI_EALREADY;
for (i = 0; i < GPIO_CHIP_MAX; i++) {
if (!gc_array[i]) {
gc_array[i] = gc;
ret = 0;
break;
}
}
return ret;
}
void gpio_chip_remove(struct gpio_chip *gc)
{
int i;
if (!gc)
return;
for (i = 0; i < GPIO_CHIP_MAX; i++) {
if (gc_array[i] == gc) {
gc_array[i] = NULL;
break;
}
}
}
int gpio_get_direction(struct gpio_pin *gp)
{
if (!gp || !gp->chip || (gp->chip->ngpio <= gp->offset))
return SBI_EINVAL;
if (!gp->chip->get_direction)
return SBI_ENOSYS;
return gp->chip->get_direction(gp);
}
int gpio_direction_input(struct gpio_pin *gp)
{
if (!gp || !gp->chip || (gp->chip->ngpio <= gp->offset))
return SBI_EINVAL;
if (!gp->chip->direction_input)
return SBI_ENOSYS;
return gp->chip->direction_input(gp);
}
int gpio_direction_output(struct gpio_pin *gp, int value)
{
if (!gp || !gp->chip || (gp->chip->ngpio <= gp->offset))
return SBI_EINVAL;
if (!gp->chip->direction_output)
return SBI_ENOSYS;
return gp->chip->direction_output(gp, value);
}
int gpio_get(struct gpio_pin *gp)
{
if (!gp || !gp->chip || (gp->chip->ngpio <= gp->offset))
return SBI_EINVAL;
if (!gp->chip->get)
return SBI_ENOSYS;
return gp->chip->get(gp);
}
int gpio_set(struct gpio_pin *gp, int value)
{
if (!gp || !gp->chip || (gp->chip->ngpio <= gp->offset))
return SBI_EINVAL;
if (!gp->chip->set)
return SBI_ENOSYS;
gp->chip->set(gp, value);
return 0;
}
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