ARM: 6967/1: ep93xx: ts72xx: fix board model detection

Fix the obvious error in board detection logic, because according to the TS's
manual, the model is stored in the least three significant bits. For example
the byte read on my ts-7300 is 0x23 and the detection then fails.

Cc: Ryan Mallon <ryan@bluewatersys.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-ep93xx/include/mach/ts72xx.h b/arch/arm/mach-ep93xx/include/mach/ts72xx.h
index ee7f875..f1397a1 100644 (file)
--- a/arch/arm/mach-ep93xx/include/mach/ts72xx.h
+++ b/arch/arm/mach-ep93xx/include/mach/ts72xx.h
@@ -6,7 +6,7 @@
  * TS72xx memory map:
  *
  * virt                phys            size
- * febff000    22000000        4K      model number register
+ * febff000    22000000        4K      model number register (bits 0-2)
  * febfe000    22400000        4K      options register
  * febfd000    22800000        4K      options register #2
  * febf9000    10800000        4K      TS-5620 RTC index register
@@ -22,6 +22,7 @@
 #define TS72XX_MODEL_TS7260            0x02
 #define TS72XX_MODEL_TS7300            0x03
 #define TS72XX_MODEL_TS7400            0x04
+#define TS72XX_MODEL_MASK              0x07
 
 
 #define TS72XX_OPTIONS_PHYS_BASE       0x22400000
@@ -53,29 +54,34 @@
 
 #ifndef __ASSEMBLY__
 
+static inline int ts72xx_model(void)
+{
+       return __raw_readb(TS72XX_MODEL_VIRT_BASE) & TS72XX_MODEL_MASK;
+}
+
 static inline int board_is_ts7200(void)
 {
-       return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7200;
+       return ts72xx_model() == TS72XX_MODEL_TS7200;
 }
 
 static inline int board_is_ts7250(void)
 {
-       return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7250;
+       return ts72xx_model() == TS72XX_MODEL_TS7250;
 }
 
 static inline int board_is_ts7260(void)
 {
-       return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7260;
+       return ts72xx_model() == TS72XX_MODEL_TS7260;
 }
 
 static inline int board_is_ts7300(void)
 {
-       return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7300;
+       return ts72xx_model()  == TS72XX_MODEL_TS7300;
 }
 
 static inline int board_is_ts7400(void)
 {
-       return __raw_readb(TS72XX_MODEL_VIRT_BASE) == TS72XX_MODEL_TS7400;
+       return ts72xx_model() == TS72XX_MODEL_TS7400;
 }
 
 static inline int is_max197_installed(void)