linux-kernel - [PATCHv2] serial: 8250

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Date:   Wed, 29 Mar 2017 20:37:16 +0200
From:   Olliver Schinagl <oliver@...inagl.nl>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Cc:     dev@...ux-sunxi.org, Kefeng Wang <wangkefeng.wang@...wei.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Jason Uy <jason.uy@...adcom.com>,
        Douglas Anderson <dianders@...omium.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Ed Blake <ed.blake@...tec.com>, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, Olliver Schinagl <oliver@...inagl.nl>
Subject: [PATCHv2] serial: 8250_dw: Minor code cleanup

Some very minor code cleanups, such as including the bitops header for
DW_UART_MCR_SIRE, use the BIT() macro as suggested by checkpatch and
removed a white space to match other invocations.

Signed-off-by: Olliver Schinagl <oliver@...inagl.nl>
---
Changes since v1:
  Split up these non-code changing changes into a separate patch.

 drivers/tty/serial/8250/8250_dw.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index e65808c482f1..56aded887771 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -13,6 +13,7 @@
  * LCR is written whilst busy.  If it is, then a busy detect interrupt is
  * raised, the LCR needs to be rewritten and the uart status register read.
  */
+#include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -39,16 +40,16 @@
 
 /* Component Parameter Register bits */
 #define DW_UART_CPR_ABP_DATA_WIDTH	(3 << 0)
-#define DW_UART_CPR_AFCE_MODE		(1 << 4)
-#define DW_UART_CPR_THRE_MODE		(1 << 5)
-#define DW_UART_CPR_SIR_MODE		(1 << 6)
-#define DW_UART_CPR_SIR_LP_MODE		(1 << 7)
-#define DW_UART_CPR_ADDITIONAL_FEATURES	(1 << 8)
-#define DW_UART_CPR_FIFO_ACCESS		(1 << 9)
-#define DW_UART_CPR_FIFO_STAT		(1 << 10)
-#define DW_UART_CPR_SHADOW		(1 << 11)
-#define DW_UART_CPR_ENCODED_PARMS	(1 << 12)
-#define DW_UART_CPR_DMA_EXTRA		(1 << 13)
+#define DW_UART_CPR_AFCE_MODE		BIT(4)
+#define DW_UART_CPR_THRE_MODE		BIT(5)
+#define DW_UART_CPR_SIR_MODE		BIT(6)
+#define DW_UART_CPR_SIR_LP_MODE		BIT(7)
+#define DW_UART_CPR_ADDITIONAL_FEATURES	BIT(8)
+#define DW_UART_CPR_FIFO_ACCESS		BIT(9)
+#define DW_UART_CPR_FIFO_STAT		BIT(10)
+#define DW_UART_CPR_SHADOW		BIT(11)
+#define DW_UART_CPR_ENCODED_PARMS	BIT(12)
+#define DW_UART_CPR_DMA_EXTRA		BIT(13)
 #define DW_UART_CPR_FIFO_MODE		(0xff << 16)
 /* Helper for fifo size calculation */
 #define DW_UART_CPR_FIFO_SIZE(a)	(((a >> 16) & 0xff) * 16)
@@ -222,7 +223,7 @@ static int dw8250_handle_irq(struct uart_port *p)
 		status = p->serial_in(p, UART_LSR);
 
 		if (!(status & (UART_LSR_DR | UART_LSR_BI)))
-			(void) p->serial_in(p, UART_RX);
+			(void)p->serial_in(p, UART_RX);
 
 		spin_unlock_irqrestore(&p->lock, flags);
 	}
-- 
2.11.0