blackfin: bf60x: anomaly: Add a temporary anomaly 0501001

Add a temporary anomaly 0501001 for data loss in MMR reading if interrupted.
Add work around for bfin serial driver as well.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/bfin_serial.h b/arch/blackfin/include/asm/bfin_serial.h
index 235c72a1f92d..8597158010b5 100644
--- a/arch/blackfin/include/asm/bfin_serial.h
+++ b/arch/blackfin/include/asm/bfin_serial.h
@@ -282,7 +282,19 @@ struct bfin_uart_regs {
 #define UART_GET_GCTL(p)      UART_GET_CTL(p)
 #define UART_GET_LCR(p)       UART_GET_CTL(p)
 #define UART_GET_MCR(p)       UART_GET_CTL(p)
+#if ANOMALY_05001001
+#define UART_GET_STAT(p) \
+({ \
+        u32 __ret; \
+        unsigned long flags; \
+        flags = hard_local_irq_save(); \
+        __ret = bfin_read32(port_membase(p) + OFFSET_STAT); \
+        hard_local_irq_restore(flags); \
+        __ret; \
+})
+#else
 #define UART_GET_STAT(p)      bfin_read32(port_membase(p) + OFFSET_STAT)
+#endif
 #define UART_GET_MSR(p)       UART_GET_STAT(p)
 
 #define UART_PUT_CHAR(p, v)   bfin_write32(port_membase(p) + OFFSET_THR, v)