MIPS: TXx9: Make spi_eeprom.c more generic

Helper routines in txx9/rbtx4938/spi_eeprom.c is not TX4938 specific.
Move it to txx9/generic/ directory and make it works with SPI bus
number other than 0.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 create mode 100644 arch/mips/txx9/generic/spi_eeprom.c
 delete mode 100644 arch/mips/txx9/rbtx4938/spi_eeprom.c

1 files changed, 17 insertions, 2 deletions

diff --git a/include/asm-mips/txx9/spi.h b/include/asm-mips/txx9/spi.h
index ddfb2a0dc432..0d727f354557 100644
--- a/include/asm-mips/txx9/spi.h
+++ b/include/asm-mips/txx9/spi.h
@@ -13,7 +13,22 @@
 #ifndef __ASM_TXX9_SPI_H
 #define __ASM_TXX9_SPI_H
 
-extern int spi_eeprom_register(int chipid);
-extern int spi_eeprom_read(int chipid, int address, unsigned char *buf, int len);
+#include <linux/errno.h>
+
+#ifdef CONFIG_SPI
+int spi_eeprom_register(int busid, int chipid, int size);
+int spi_eeprom_read(int busid, int chipid,
+                    int address, unsigned char *buf, int len);
+#else
+static inline int spi_eeprom_register(int busid, int chipid, int size)
+{
+        return -ENODEV;
+}
+static inline int spi_eeprom_read(int busid, int chipid,
+                                  int address, unsigned char *buf, int len)
+{
+        return -ENODEV;
+}
+#endif
 
 #endif /* __ASM_TXX9_SPI_H */