Non-volatile memory data repository pattern (#24356)

* First batch of eeconfig conversions.

* Offset and length for datablocks.

* `via`, `dynamic_keymap`.

* Fix filename.

* Commentary.

* wilba leds

* satisfaction75

* satisfaction75

* more keyboard whack-a-mole

* satisfaction75

* omnikeyish

* more whack-a-mole

* `generic_features.mk` to automatically pick up nvm repositories

* thievery

* deferred variable resolve

* whitespace

* convert api to structs/unions

* convert api to structs/unions

* convert api to structs/unions

* fixups

* code-side docs

* code size fix

* rollback

* nvm_xxxxx_erase

* Updated location of eeconfig magic numbers so non-EEPROM nvm drivers can use them too.

* Fixup build.

* Fixup compilation error with encoders.

* Build fixes.

* Add `via_ci` keymap to onekey to exercise VIA bindings (and thus dynamic keymap et.al.), fixup compilation errors based on preprocessor+sizeof.

* Build failure rectification.

1 files changed, 17 insertions, 0 deletions

diff --git a/quantum/nvm/nvm_via.h b/quantum/nvm/nvm_via.h
new file mode 100644
index 0000000000..90c5e67421
--- /dev/null
+++ b/quantum/nvm/nvm_via.h
@@ -0,0 +1,17 @@
+// Copyright 2024 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+void nvm_via_erase(void);
+
+void nvm_via_read_magic(uint8_t *magic0, uint8_t *magic1, uint8_t *magic2);
+void nvm_via_update_magic(uint8_t magic0, uint8_t magic1, uint8_t magic2);
+
+uint32_t nvm_via_read_layout_options(void);
+void     nvm_via_update_layout_options(uint32_t val);
+
+uint32_t nvm_via_read_custom_config(void *buf, uint32_t offset, uint32_t length);
+uint32_t nvm_via_update_custom_config(const void *buf, uint32_t offset, uint32_t length);