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// SPDX-License-Identifier: GPL-2.0
/* Author: Dan Scally <djrscally@gmail.com> */
#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "intel_skl_int3472_common.h"
union acpi_object *skl_int3472_get_acpi_buffer(struct acpi_device *adev, char *id)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_handle handle = adev->handle;
union acpi_object *obj;
acpi_status status;
status = acpi_evaluate_object(handle, id, NULL, &buffer);
if (ACPI_FAILURE(status))
return ERR_PTR(-ENODEV);
obj = buffer.pointer;
if (!obj)
return ERR_PTR(-ENODEV);
if (obj->type != ACPI_TYPE_BUFFER) {
acpi_handle_err(handle, "%s object is not an ACPI buffer\n", id);
kfree(obj);
return ERR_PTR(-EINVAL);
}
return obj;
}
int skl_int3472_fill_cldb(struct acpi_device *adev, struct int3472_cldb *cldb)
{
union acpi_object *obj;
int ret;
obj = skl_int3472_get_acpi_buffer(adev, "CLDB");
if (IS_ERR(obj))
return PTR_ERR(obj);
if (obj->buffer.length > sizeof(*cldb)) {
acpi_handle_err(adev->handle, "The CLDB buffer is too large\n");
ret = -EINVAL;
goto out_free_obj;
}
memcpy(cldb, obj->buffer.pointer, obj->buffer.length);
ret = 0;
out_free_obj:
kfree(obj);
return ret;
}
static const struct acpi_device_id int3472_device_id[] = {
{ "INT3472", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, int3472_device_id);
static struct platform_driver int3472_discrete = {
.driver = {
.name = "int3472-discrete",
.acpi_match_table = int3472_device_id,
},
.probe = skl_int3472_discrete_probe,
.remove = skl_int3472_discrete_remove,
};
static struct i2c_driver int3472_tps68470 = {
.driver = {
.name = "int3472-tps68470",
.acpi_match_table = int3472_device_id,
},
.probe_new = skl_int3472_tps68470_probe,
};
static int skl_int3472_init(void)
{
int ret;
ret = platform_driver_register(&int3472_discrete);
if (ret)
return ret;
ret = i2c_register_driver(THIS_MODULE, &int3472_tps68470);
if (ret)
platform_driver_unregister(&int3472_discrete);
return ret;
}
module_init(skl_int3472_init);
static void skl_int3472_exit(void)
{
platform_driver_unregister(&int3472_discrete);
i2c_del_driver(&int3472_tps68470);
}
module_exit(skl_int3472_exit);
MODULE_DESCRIPTION("Intel SkyLake INT3472 ACPI Device Driver");
MODULE_AUTHOR("Daniel Scally <djrscally@gmail.com>");
MODULE_LICENSE("GPL v2");
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