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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 Ahmad Fatoum, Pengutronix
*/
#define pr_fmt(fmt) "superio: " fmt
#include <common.h>
#include <superio.h>
#include <regmap.h>
struct device_d *superio_func_add(struct superio_chip *siochip, const char *name)
{
struct device_d *dev;
int ret;
dev = device_alloc(name, DEVICE_ID_DYNAMIC);
dev->parent = siochip->dev;
ret = platform_device_register(dev);
if (ret)
return NULL;
return dev;
}
EXPORT_SYMBOL(superio_func_add)
static int superio_reg_read(void *ctx, unsigned int reg, unsigned int *val)
{
struct superio_chip *siochip = ctx;
siochip->enter(siochip->sioaddr);
*val = superio_inb(siochip->sioaddr, reg);
siochip->exit(siochip->sioaddr);
return 0;
}
static int superio_reg_write(void *ctx, unsigned int reg, unsigned int val)
{
struct superio_chip *siochip = ctx;
siochip->enter(siochip->sioaddr);
superio_outb(siochip->sioaddr, reg, val);
siochip->exit(siochip->sioaddr);
return 0;
}
static struct regmap_bus superio_regmap_bus = {
.reg_write = superio_reg_write,
.reg_read = superio_reg_read,
};
static struct regmap_config superio_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.reg_stride = 1,
.max_register = 0xff,
};
void superio_chip_add(struct superio_chip *siochip)
{
struct regmap *regmap;
char *chipname;
char str[5];
int ret;
chipname = xasprintf("superio-%04x:%04x@%02x",
siochip->vid, siochip->devid, siochip->sioaddr);
siochip->dev = add_generic_device(chipname, DEVICE_ID_SINGLE, NULL,
siochip->sioaddr, 2, IORESOURCE_IO,
NULL);
siochip->dev->priv = siochip;
sprintf(str, "%04x", siochip->vid);
dev_add_param_fixed(siochip->dev, "vendor", str);
sprintf(str, "%04x", siochip->devid);
dev_add_param_fixed(siochip->dev, "device", str);
regmap = regmap_init(siochip->dev, &superio_regmap_bus, siochip,
&superio_regmap_config);
if (IS_ERR(regmap))
pr_warn("creating %s regmap failed: %s\n",
chipname, strerror(-PTR_ERR(regmap)));
ret = regmap_register_cdev(regmap, chipname);
if (ret)
pr_warn("registering %s regmap cdev failed: %s\n",
chipname, strerror(-ret));
}
EXPORT_SYMBOL(superio_chip_add)
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