[RFC 1/5] eeprom: starfive: function get_product_id_from_eeprom()

[Heinrich Schuchardt]

Export a function get_product_id_from_eeprom() to read the product ID.
This value can be used for fixing up the device-tree on JH7110 based
products.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 arch/riscv/include/asm/arch-jh7110/eeprom.h         | 9 +++++++++
 board/starfive/visionfive2/visionfive2-i2c-eeprom.c | 8 ++++++++
 2 files changed, 17 insertions(+)

diff --git a/arch/riscv/include/asm/arch-jh7110/eeprom.h b/arch/riscv/include/asm/arch-jh7110/eeprom.h
index d2776d5b6cb..62d184aeb57 100644
--- a/arch/riscv/include/asm/arch-jh7110/eeprom.h
+++ b/arch/riscv/include/asm/arch-jh7110/eeprom.h
@@ -12,4 +12,13 @@
 u8 get_pcb_revision_from_eeprom(void);
 u32 get_ddr_size_from_eeprom(void);
 
+/**
+ * get_product_id_from_eeprom - get product ID string
+ *
+ * A string like "VF7110A1-2228-D008E000-00000001" is returned.
+ *
+ * Return:	product ID string
+ */
+const char *get_product_id_from_eeprom(void);
+
 #endif /* _ASM_RISCV_EEPROM_H */
diff --git a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
index c36de1a5125..a9f4376c8e1 100644
--- a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
+++ b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c
@@ -405,6 +405,14 @@ static void set_product_id(char *string)
 	update_crc();
 }
 
+const char *get_product_id_from_eeprom(void)
+{
+	if (read_eeprom())
+		return NULL;
+
+	return pbuf.eeprom.atom1.data.pstr;
+}
+
 int do_mac(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 {
 	char *cmd;
-- 
2.43.0