Merge branch 'for-next/misc'

1 files changed, 73 insertions, 0 deletions

diff --git a/include/acpi.h b/include/acpi.h
new file mode 100644
index 0000000000..2d5fd3086a
--- /dev/null
+++ b/include/acpi.h
@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Ahmad Fatoum
+ */
+
+#ifndef __ACPI_H_
+#define __ACPI_H_
+
+#include <linux/types.h>
+#include <driver.h>
+
+typedef char acpi_sig_t[4];
+
+struct __packed acpi_rsdp { /* root system description pointer */
+	char	signature[8];
+	u8	checksum;
+	u8	oem_id[6];
+	u8	revision;
+	u32	rsdt_addr;
+};
+
+struct __packed acpi2_rsdp { /* root system description */
+	struct acpi_rsdp acpi1;
+	u32	length;
+	u64	xsdt_addr;
+	u8	extended_checksum;
+	u8	reserved[3];
+};
+
+struct __packed acpi_sdt { /* system description table header */
+	acpi_sig_t	signature;
+	u32		len;
+	u8		revision;
+	u8		checksum;
+	char		oem_id[6];
+	char		oem_table_id[8];
+	u32		oem_revision;
+	u32		creator_id;
+	u32		creator_revision;
+};
+
+struct __packed acpi_rsdt { /* system description table header */
+	struct acpi_sdt	sdt;
+	struct acpi_sdt	* __aligned(8) entries[];
+};
+
+struct acpi_driver {
+	struct driver_d driver;
+	acpi_sig_t signature;
+};
+
+extern struct bus_type acpi_bus;
+
+static inline struct acpi_driver *to_acpi_driver(struct driver_d *drv)
+{
+	return container_of(drv, struct acpi_driver, driver);
+}
+
+#define device_acpi_driver(drv)	\
+	register_driver_macro(device, acpi, drv)
+
+static inline int acpi_driver_register(struct acpi_driver *acpidrv)
+{
+	acpidrv->driver.bus = &acpi_bus;
+	return register_driver(&acpidrv->driver);
+}
+
+static inline int acpi_sigcmp(const acpi_sig_t sig_a, const acpi_sig_t sig_b)
+{
+	return memcmp(sig_a, sig_b, sizeof(acpi_sig_t));
+}
+
+#endif