[PATCH v2] drivers/tty: Use bitwise instead of arithmetic operator for flags

[Jiapeng Zhong]

Fix the following coccicheck warning:

./drivers/tty/synclink_gt.c:4384:15-16: WARNING: sum of probable
bitmasks, consider |
./drivers/tty/synclink_gt.c:4342:39-40: WARNING: sum of probable
bitmasks, consider |
./drivers/tty/synclink_gt.c:4280:48-49: WARNING: sum of probable
bitmasks, consider |
./drivers/tty/synclink_gt.c:2221:20-21: WARNING: sum of probable
bitmasks, consider |

Reported-by: Abaci Robot <ab...@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bug...@linux.alibaba.com>
---
Changes in v2:
  -Supplement and modification.

 drivers/tty/synclink_gt.c | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index c0b384e..fa2a92a 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -2219,7 +2219,7 @@ static void isr_tdma(struct slgt_info *info)
         */
        wr_reg32(info, TDCSR, status);  /* clear pending */
 
-       if (status & (BIT5 + BIT4 + BIT3)) {
+       if (status & (BIT5 | BIT4 | BIT3)) {
                // another transmit buffer has completed
                // run bottom half to get more send data from user
                info->pending_bh |= BH_TRANSMIT;
@@ -4263,9 +4263,11 @@ static void sync_mode(struct slgt_info *info)
 
        switch(info->params.mode) {
        case MGSL_MODE_XSYNC:
-               val |= BIT15 + BIT13;
+               val |= BIT15 | BIT13;
+               break;
+       case MGSL_MODE_MONOSYNC:
+               val |= BIT14 | BIT13;
                break;
-       case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
        case MGSL_MODE_BISYNC:   val |= BIT15; break;
        case MGSL_MODE_RAW:      val |= BIT13; break;
        }
@@ -4276,17 +4278,27 @@ static void sync_mode(struct slgt_info *info)
        {
        case HDLC_ENCODING_NRZB:          val |= BIT10; break;
        case HDLC_ENCODING_NRZI_MARK:     val |= BIT11; break;
-       case HDLC_ENCODING_NRZI:          val |= BIT11 + BIT10; break;
+       case HDLC_ENCODING_NRZI:
+               val |= BIT11 | BIT10;
+               break;
        case HDLC_ENCODING_BIPHASE_MARK:  val |= BIT12; break;
-       case HDLC_ENCODING_BIPHASE_SPACE: val |= BIT12 + BIT10; break;
-       case HDLC_ENCODING_BIPHASE_LEVEL: val |= BIT12 + BIT11; break;
-       case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: val |= BIT12 + BIT11 + BIT10; 
break;
+       case HDLC_ENCODING_BIPHASE_SPACE:
+               val |= BIT12 | BIT10;
+               break;
+       case HDLC_ENCODING_BIPHASE_LEVEL:
+               val |= BIT12 | BIT11;
+               break;
+       case HDLC_ENCODING_DIFF_BIPHASE_LEVEL:
+               val |= BIT12 | BIT11 | BIT10;
+               break;
        }
 
        switch (info->params.crc_type & HDLC_CRC_MASK)
        {
        case HDLC_CRC_16_CCITT: val |= BIT9; break;
-       case HDLC_CRC_32_CCITT: val |= BIT9 + BIT8; break;
+       case HDLC_CRC_32_CCITT:
+               val |= BIT9 | BIT8;
+               break;
        }
 
        if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
@@ -4296,7 +4308,9 @@ static void sync_mode(struct slgt_info *info)
        {
        case HDLC_PREAMBLE_LENGTH_16BITS: val |= BIT5; break;
        case HDLC_PREAMBLE_LENGTH_32BITS: val |= BIT4; break;
-       case HDLC_PREAMBLE_LENGTH_64BITS: val |= BIT5 + BIT4; break;
+       case HDLC_PREAMBLE_LENGTH_64BITS:
+               val |= BIT5 | BIT4;
+               break;
        }
 
        if (info->params.flags & HDLC_FLAG_AUTO_CTS)
@@ -4382,7 +4396,7 @@ static void sync_mode(struct slgt_info *info)
                // reference clock, so take TxC from BRG/16 to get
                // transmit clock at actual data rate
                if (info->params.flags & HDLC_FLAG_RXC_DPLL)
-                       val |= BIT6 + BIT5;     /* 011, txclk = BRG/16 */
+                       val |= BIT6 | BIT5;     /* 011, txclk = BRG/16 */
                else
                        val |= BIT6;    /* 010, txclk = BRG */
        }
-- 
1.8.3.1