linux-kernel - [PATCH v2 3/4] serial: Convert serial

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Message-Id: <20220830072956.3630-4-ilpo.jarvinen@linux.intel.com>
Date:   Tue, 30 Aug 2022 10:29:55 +0300
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        linux-serial@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Cc:     Lino Sanfilippo <LinoSanfilippo@....de>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v2 3/4] serial: Convert serial_rs485 to kernel doc

Convert struct serial_rs485 comments to kernel doc format.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
 include/uapi/linux/serial.h | 61 ++++++++++++++++++++++++-------------
 1 file changed, 40 insertions(+), 21 deletions(-)

diff --git a/include/uapi/linux/serial.h b/include/uapi/linux/serial.h
index cea06924b295..dbdc7865abdc 100644
--- a/include/uapi/linux/serial.h
+++ b/include/uapi/linux/serial.h
@@ -107,37 +107,56 @@ struct serial_icounter_struct {
 	int reserved[9];
 };
 
-/*
+/**
+ * struct serial_rs485 - serial interface for controlling RS485 settings.
+ * @flags:			RS485 feature flags
+ * @delay_rts_before_send:	Delay before send (milliseconds)
+ * @delay_rts_after_send:	Delay after send (milliseconds)
+ * @addr_recv:			Receive filter for RS485 addressing mode
+ *				(used only when %SER_RS485_ADDR_RECV is set).
+ * @addr_dest:			Destination address for RS485 addressing mode
+ *				(used only when %SER_RS485_ADDR_DEST is set).
+ * @padding0:			Padding (set to zero).
+ * @padding1:			Padding (set to zero).
+ * @padding:			Deprecated, use @padding0 and @padding1 instead.
+ *				Do not use with @addr_recv and @addr_dest (due to
+ *				overlap).
+ *
  * Serial interface for controlling RS485 settings on chips with suitable
  * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
  * platform. The set function returns the new state, with any unsupported bits
  * reverted appropriately.
+ *
+ * serial_rs485::flags bits are:
+ * * %SER_RS485_ENABLED		- RS485 enabled
+ * * %SER_RS485_RTS_ON_SEND	- Logical level for RTS pin when sending
+ * * %SER_RS485_RTS_AFTER_SEND	- Logical level for RTS pin after sent
+ * * %SER_RS485_RX_DURING_TX	- Full-duplex RS485 line
+ * * %SER_RS485_TERMINATE_BUS	- Enable bus termination (if supported)
+ * * %SER_RS485_ADDRB		- Enable RS485 addressing mode
+ * * %SER_RS485_ADDR_RECV	- Receive address filter (enables @addr_recv).
+ *				  Requires %SER_RS485_ADDRB.
+ * * %SER_RS485_ADDR_DEST	- Destination address (enables @addr_dest).
+ *				  Requires %SER_RS485_ADDRB.
  */
-
 struct serial_rs485 {
-	__u32	flags;			/* RS485 feature flags */
-#define SER_RS485_ENABLED		(1 << 0)	/* If enabled */
-#define SER_RS485_RTS_ON_SEND		(1 << 1)	/* Logical level for
-							   RTS pin when
-							   sending */
-#define SER_RS485_RTS_AFTER_SEND	(1 << 2)	/* Logical level for
-							   RTS pin after sent*/
+	__u32	flags;
+#define SER_RS485_ENABLED		(1 << 0)
+#define SER_RS485_RTS_ON_SEND		(1 << 1)
+#define SER_RS485_RTS_AFTER_SEND	(1 << 2)
 #define SER_RS485_RX_DURING_TX		(1 << 4)
-#define SER_RS485_TERMINATE_BUS		(1 << 5)	/* Enable bus
-							   termination
-							   (if supported) */
-
-/* RS-485 addressing mode */
-#define SER_RS485_ADDRB			(1 << 6)	/* Enable addressing mode */
-#define SER_RS485_ADDR_RECV		(1 << 7)	/* Receive address filter */
-#define SER_RS485_ADDR_DEST		(1 << 8)	/* Destination address */
+#define SER_RS485_TERMINATE_BUS		(1 << 5)
+#define SER_RS485_ADDRB			(1 << 6)
+#define SER_RS485_ADDR_RECV		(1 << 7)
+#define SER_RS485_ADDR_DEST		(1 << 8)
 
-	__u32	delay_rts_before_send;	/* Delay before send (milliseconds) */
-	__u32	delay_rts_after_send;	/* Delay after send (milliseconds) */
+	__u32	delay_rts_before_send;
+	__u32	delay_rts_after_send;
 
-	/* The fields below are defined by flags */
+	/* private: The fields below are defined by flags */
 	union {
-		__u32	padding[5];		/* Memory is cheap, new structs are a pain */
+		/* private: Memory is cheap, new structs are a pain. */
+		__u32	padding[5];
 
 		struct {
 			__u8	addr_recv;
-- 
2.30.2