tegra/platform: Add driver for firmware class and inventory

Add driver for common utility API for firmware class and
dumping the inventory for all firmware.

Bug 3583607

Change-Id: I259bc7f80b8842cea090f67b067f63e5f85cb79c
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2708890
GVS: Gerrit_Virtual_Submit

include/linux/tegra-firmwares.h

@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2022, NVIDIA CORPORATION, All rights reserved.
+
+#ifndef __TEGRA_FIRMWARES_H
+#define __TEGRA_FIRMWARES_H
+
+/*
+ * max size of version string
+ */
+#define TFW_VERSION_MAX_SIZE 256
+
+struct device *tegrafw_register(const char *name,
+			const u32 flags,
+			ssize_t (*reader)(struct device *dev, char *, size_t),
+			const char *string);
+void tegrafw_unregister(struct device *fwdev);
+struct device *devm_tegrafw_register(struct device *dev,
+			const char *name,
+			const u32 flags,
+			ssize_t (*reader)(struct device *dev, char *, size_t),
+			const char *string);
+void devm_tegrafw_unregister(struct device *dev, struct device *fwdev);
+void tegrafw_invalidate(struct device *fwdev);
+struct device *devm_tegrafw_register_dt_string(struct device *dev,
+						const char *name,
+						const char *path,
+						const char *property);
+enum {
+	TFW_NORMAL	= 0x0000,
+	TFW_DONT_CACHE	= 0x0001,
+	TFW_MAX		= 0xFFFF,
+};
+
+static inline struct device *tegrafw_register_string(const char *name,
+						     const char *string)
+{
+	return tegrafw_register(name, TFW_NORMAL, NULL, string);
+}
+
+static inline struct device *devm_tegrafw_register_string(struct device *dev,
+						     const char *name,
+						     const char *string)
+{
+	return devm_tegrafw_register(dev, name, TFW_NORMAL, NULL, string);
+}
+
+static inline struct device *tegrafw_register_dt_string(const char *name,
+							const char *path,
+							const char *property)
+{
+	return devm_tegrafw_register_dt_string(NULL, name, path, property);
+}
+
+#endif /* __TEGRA_FIRMWARES_CLASS */