mpc85xx: add SPI kernel loader for TP-Link TL-WDR4900 v1

Similar to the lzma-loader on our MIPS targets, the spi-loader acts as
a second-stage loader that will then load and start the actual kernel.
As the TL-WDR4900 uses SPI-NOR and the P1010 family does not have support
for memory mapping of this type of flash, this loader needs to contain a
basic driver for the FSL ESPI controller.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
(cherry picked from commit a296055b82fbb20457273492069ce9d62009e2a1)

1 files changed, 11 insertions, 0 deletions

diff --git a/target/linux/mpc85xx/image/spi-loader/include/spi-nor.h b/target/linux/mpc85xx/image/spi-loader/include/spi-nor.h
new file mode 100644
index 0000000000..efbf386601
--- /dev/null
+++ b/target/linux/mpc85xx/image/spi-loader/include/spi-nor.h
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (c) 2022 Matthias Schiffer <mschiffer@universe-factory.net>
+ */
+
+#pragma once
+
+#include <types.h>
+
+int spi_nor_read_id(void);
+int spi_nor_read_data(void *dest, size_t pos, size_t len);