ti: common: board_detect: Add function to determine if EEPROM was read

When the EEPROM is first read its contents are stored in memory as a
cache to avoid further I2C operations. To determine if the EEPROM was
previously read the easiest way is to check the memory to see if the
EEPROM's magic header value is set. Create a new function that can
determine if the EEPROM was previously read or not without having to
perform a I2C transaction.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
index bf594cb1ab3..1da5ace9236 100644
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -457,3 +457,13 @@ void board_ti_set_ethaddr(int index)
 		}
 	}
 }
+
+bool __maybe_unused board_ti_was_eeprom_read(void)
+{
+	struct ti_common_eeprom *ep = TI_EEPROM_DATA;
+
+	if (ep->header == TI_EEPROM_HEADER_MAGIC)
+		return true;
+	else
+		return false;
+}