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// SPDX-License-Identifier: GPL-2.0
/* Author: Dan Scally <djrscally@gmail.com> */
#include <linux/acpi.h>
#include <linux/slab.h>
#include "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;
}
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