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https://github.com/AsahiLinux/u-boot
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93f7f82782
A device may want to write out ACPI tables to describe itself to Linux. Add a method to permit this. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Core driver model support for ACPI table generation
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*
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* Copyright 2019 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#define LOG_CATEOGRY LOGC_ACPI
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#include <common.h>
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#include <dm.h>
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#include <dm/acpi.h>
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#include <dm/device-internal.h>
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#include <dm/root.h>
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/* Type of method to call */
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enum method_t {
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METHOD_WRITE_TABLES,
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};
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/* Prototype for all methods */
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typedef int (*acpi_method)(const struct udevice *dev, struct acpi_ctx *ctx);
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int acpi_copy_name(char *out_name, const char *name)
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{
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strncpy(out_name, name, ACPI_NAME_LEN);
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out_name[ACPI_NAME_LEN] = '\0';
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return 0;
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}
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int acpi_get_name(const struct udevice *dev, char *out_name)
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{
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struct acpi_ops *aops;
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aops = device_get_acpi_ops(dev);
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if (aops && aops->get_name)
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return aops->get_name(dev, out_name);
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return -ENOSYS;
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}
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acpi_method acpi_get_method(struct udevice *dev, enum method_t method)
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{
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struct acpi_ops *aops;
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aops = device_get_acpi_ops(dev);
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if (aops) {
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switch (method) {
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case METHOD_WRITE_TABLES:
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return aops->write_tables;
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}
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}
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return NULL;
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}
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int acpi_recurse_method(struct acpi_ctx *ctx, struct udevice *parent,
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enum method_t method)
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{
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struct udevice *dev;
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acpi_method func;
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int ret;
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func = acpi_get_method(parent, method);
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if (func) {
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log_debug("\n");
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log_debug("- %s %p\n", parent->name, func);
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ret = device_ofdata_to_platdata(parent);
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if (ret)
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return log_msg_ret("ofdata", ret);
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ret = func(parent, ctx);
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if (ret)
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return log_msg_ret("func", ret);
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}
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device_foreach_child(dev, parent) {
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ret = acpi_recurse_method(ctx, dev, method);
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if (ret)
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return log_msg_ret("recurse", ret);
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}
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return 0;
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}
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int acpi_write_dev_tables(struct acpi_ctx *ctx)
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{
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int ret;
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log_debug("Writing device tables\n");
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ret = acpi_recurse_method(ctx, dm_root(), METHOD_WRITE_TABLES);
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log_debug("Writing finished, err=%d\n", ret);
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return ret;
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}
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