From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH 1/5] tty: serial: define UART_LCR_WLEN() macro
Date: Thu, 24 Feb 2022 10:55:54 +0100 [thread overview]
Message-ID: <20220224095558.30929-1-jslaby@suse.cz> (raw)
In-Reply-To: <20220224095517.30872-1-jslaby@suse.cz>
Define a generic UART_LCR_WLEN() macro with a size argument. It can be
used to encode byte size into an LCR value. Therefore we can use it to
simplify the drivers using tty_get_char_size() in the next patches.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
include/uapi/linux/serial_reg.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
index f51bc8f36813..c9d5ff6dd4c6 100644
--- a/include/uapi/linux/serial_reg.h
+++ b/include/uapi/linux/serial_reg.h
@@ -111,6 +111,7 @@
#define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */
#define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */
#define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */
+#define UART_LCR_WLEN(x) ((x) - 5)
/*
* Access to some registers depends on register access / configuration
--
2.35.1
next prev parent reply other threads:[~2022-02-24 9:56 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-24 9:55 [PATCH 0/5] UART_LCR_WLEN cleanups Jiri Slaby
2022-02-24 9:55 ` Jiri Slaby [this message]
2022-02-24 9:55 ` [PATCH 2/5] tty: serial: make use of UART_LCR_WLEN() + tty_get_char_size() Jiri Slaby
2022-02-24 16:38 ` Thierry Reding
2022-02-24 9:55 ` [PATCH 3/5] USB: " Jiri Slaby
2022-02-24 9:55 ` [PATCH 4/5] sdio_uart: " Jiri Slaby
2022-02-28 16:16 ` Ulf Hansson
2022-02-24 9:55 ` [PATCH 5/5] mxser: " Jiri Slaby
2022-02-24 10:10 ` [PATCH 1/5] tty: serial: define UART_LCR_WLEN() macro Greg KH
2022-02-24 10:42 ` Jiri Slaby
2022-02-24 11:23 ` Greg KH
2022-02-25 9:40 ` Greg KH
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