omap: Serial: Define register access modes in LCR

Access to some registers depends on register access mode
Three different modes are available for OMAP (at least)
• Operational mode     LCR_REG[7] = 0x0
• Configuration mode A LCR_REG[7] = 0x1 and LCR_REG[7:0]! = 0xBF
• Configuration mode B LCR_REG[7] = 0x1 and LCR_REG[7:0]  = 0xBF

Define access modes and remove redefinitions and magic numbers
in serial drivers (and later in bluetooth driver).

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h
index 6f3823474e6c..3ecb71a9e505 100644
--- a/include/linux/serial_reg.h
+++ b/include/linux/serial_reg.h
@@ -99,6 +99,13 @@
 #define UART_LCR_WLEN7          0x02 /* Wordlength: 7 bits */
 #define UART_LCR_WLEN8          0x03 /* Wordlength: 8 bits */
 
+/*
+ * Access to some registers depends on register access / configuration
+ * mode.
+ */
+#define UART_LCR_CONF_MODE_A    UART_LCR_DLAB   /* Configutation mode A */
+#define UART_LCR_CONF_MODE_B    0xBF            /* Configutation mode B */
+
 #define UART_MCR        4       /* Out: Modem Control Register */
 #define UART_MCR_CLKSEL         0x80 /* Divide clock by 4 (TI16C752, EFR[4]=1) */
 #define UART_MCR_TCRTLR         0x40 /* Access TCR/TLR (TI16C752, EFR[4]=1) */