Merge https://gitlab.denx.de/u-boot/custodians/u-boot-x86

- Provide serial base clock speed via getinfo() for ACPI SPCR
- Initial ACPI support from DM core by leveraging existing ACPI support
  in x86

1 files changed, 77 insertions, 0 deletions

diff --git a/include/dm/acpi.h b/include/dm/acpi.h
new file mode 100644
index 0000000000..49257914ff
--- /dev/null
+++ b/include/dm/acpi.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Core ACPI (Advanced Configuration and Power Interface) support
+ *
+ * Copyright 2019 Google LLC
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __DM_ACPI_H__
+#define __DM_ACPI_H__
+
+/* Allow operations to be optional for ACPI */
+#if CONFIG_IS_ENABLED(ACPIGEN)
+#define ACPI_OPS_PTR(_ptr)	.acpi_ops	= _ptr,
+#else
+#define ACPI_OPS_PTR(_ptr)
+#endif
+
+/* Length of an ACPI name string, excluding nul terminator */
+#define ACPI_NAME_LEN	4
+
+/* Length of an ACPI name string including nul terminator */
+#define ACPI_NAME_MAX	(ACPI_NAME_LEN + 1)
+
+#if !defined(__ACPI__)
+
+/**
+ * struct acpi_ops - ACPI operations supported by driver model
+ */
+struct acpi_ops {
+	/**
+	 * get_name() - Obtain the ACPI name of a device
+	 *
+	 * @dev: Device to check
+	 * @out_name: Place to put the name, must hold at least ACPI_NAME_MAX
+	 *	bytes
+	 * @return 0 if OK, -ENOENT if no name is available, other -ve value on
+	 *	other error
+	 */
+	int (*get_name)(const struct udevice *dev, char *out_name);
+};
+
+#define device_get_acpi_ops(dev)	((dev)->driver->acpi_ops)
+
+/**
+ * acpi_get_name() - Obtain the ACPI name of a device
+ *
+ * @dev: Device to check
+ * @out_name: Place to put the name, must hold at least ACPI_NAME_MAX
+ *	bytes
+ * @return 0 if OK, -ENOENT if no name is available, other -ve value on
+ *	other error
+ */
+int acpi_get_name(const struct udevice *dev, char *out_name);
+
+/**
+ * acpi_copy_name() - Copy an ACPI name to an output buffer
+ *
+ * This convenience function can be used to return a literal string as a name
+ * in functions that implement the get_name() method.
+ *
+ * For example:
+ *
+ *	static int mydev_get_name(const struct udevice *dev, char *out_name)
+ *	{
+ *		return acpi_copy_name(out_name, "WIBB");
+ *	}
+ *
+ * @out_name: Place to put the name
+ * @name: Name to copy
+ * @return 0 (always)
+ */
+int acpi_copy_name(char *out_name, const char *name);
+
+#endif /* __ACPI__ */
+
+#endif