spi25.c: Add function to return opcode of passed erase fucntion pointer

There is a function, spi_get_erasefn_from_opcode, which returns the
erase function for given opcode. Add a function which does the opposite
i.e. returns the opcode for given erase function.

Change-Id: Ia3aefc9b9465efdd16b1678bb2ada9a23f00d316
Signed-off-by: Aarya Chaumal <aarya.chaumal@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/65355
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Thomas Heijligen <src@posteo.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/spi25.c b/spi25.c
index acd13b33f..445410630 100644
--- a/spi25.c
+++ b/spi25.c
@@ -651,6 +651,18 @@ erasefunc_t *spi_get_erasefn_from_opcode(uint8_t opcode)
 	return NULL;
 }
 
+uint8_t spi_get_opcode_from_erasefn(erasefunc_t *func)
+{
+	size_t i;
+	for (i = 0; i < ARRAY_SIZE(function_opcode_list); i++) {
+		if (function_opcode_list[i].func == func)
+			return function_opcode_list[i].opcode;
+	}
+	msg_cinfo("%s: unknown erase function (0x%p). Please report "
+			"this at flashrom@flashrom.org\n", __func__, func);
+	return 0x00; //Assuming 0x00 is not a erase function opcode
+}
+
 static int spi_nbyte_program(struct flashctx *flash, unsigned int addr, const uint8_t *bytes, unsigned int len)
 {
 	const bool native_4ba = flash->chip->feature_bits & FEATURE_4BA_WRITE && spi_master_4ba(flash);