From: Crescent Hsieh <crescentcy.hsieh@moxa.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jirislaby@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
FangpingFP.Cheng@moxa.com, Epson.Chiang@moxa.com,
Crescent Hsieh <crescentcy.hsieh@moxa.com>
Subject: [PATCH v2 02/15] serial: 8250: add Moxa MUEx50 UART port type
Date: Wed, 1 Jul 2026 11:41:15 +0800 [thread overview]
Message-ID: <20260701034128.218569-3-crescentcy.hsieh@moxa.com> (raw)
In-Reply-To: <20260701034128.218569-1-crescentcy.hsieh@moxa.com>
Add a new 8250 port type for the Moxa MUEx50 UART and describe its basic
FIFO size and trigger characteristics in the 8250 port configuration
table.
The 8250_mxpcie driver sets UPF_FIXED_TYPE and uses PORT_MUEX50 so that
the generic 8250 core applies the correct defaults.
Signed-off-by: Crescent Hsieh <crescentcy.hsieh@moxa.com>
---
drivers/tty/serial/8250/8250_mxpcie.c | 3 ++-
drivers/tty/serial/8250/8250_port.c | 8 ++++++++
include/uapi/linux/serial_core.h | 3 +++
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/8250/8250_mxpcie.c b/drivers/tty/serial/8250/8250_mxpcie.c
index 7a509e0a2bd7..c82d3149a03d 100644
--- a/drivers/tty/serial/8250/8250_mxpcie.c
+++ b/drivers/tty/serial/8250/8250_mxpcie.c
@@ -219,7 +219,8 @@ static int mxpcie8250_probe(struct pci_dev *pdev, const struct pci_device_id *id
up.port.dev = dev;
up.port.irq = pdev->irq;
up.port.uartclk = MOXA_PUART_BASE_BAUD * 16;
- up.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+ up.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
+ up.port.type = PORT_MUEX50;
up.port.iotype = UPIO_MEM;
up.port.iobase = 0;
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 719faf92aa8a..a17fdb5d68d2 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -310,6 +310,14 @@ static const struct serial8250_config uart_config[] = {
.rxtrig_bytes = {1, 8, 16, 30},
.flags = UART_CAP_FIFO | UART_CAP_AFE,
},
+ [PORT_MUEX50] = {
+ .name = "Moxa MUEx50 UART",
+ .fifo_size = 128,
+ .tx_loadsz = 128,
+ .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
+ .rxtrig_bytes = {15, 31, 63, 111},
+ .flags = UART_CAP_FIFO,
+ },
};
/* Uart divisor latch read */
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 9c007a106330..377884e3856a 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -100,6 +100,9 @@
/* TXX9 type number */
#define PORT_TXX9 64
+/* Moxa MUEx50 UART */
+#define PORT_MUEX50 65
+
/*Digi jsm */
#define PORT_JSM 69
--
2.45.2
next prev parent reply other threads:[~2026-07-01 3:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 3:41 [PATCH v2 00/15] serial: 8250: add Moxa MUEx50 PCIe board support Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 01/15] serial: 8250: split Moxa PCIe serial board support out of 8250_pci Crescent Hsieh
2026-07-01 12:42 ` Andy Shevchenko
2026-07-01 3:41 ` Crescent Hsieh [this message]
2026-07-01 3:41 ` [PATCH v2 03/15] serial: 8250_mxpcie: enable enhanced mode and program FIFO trigger levels Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 04/15] serial: 8250_mxpcie: enable automatic RTS/CTS flow control Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 05/15] serial: 8250_mxpcie: offload XON/XOFF flow control to MUEx50 hardware Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 06/15] serial: 8250_mxpcie: add custom handle_irq callback Crescent Hsieh
2026-07-01 12:41 ` Andy Shevchenko
2026-07-01 3:41 ` [PATCH v2 07/15] serial: 8250_mxpcie: speed up RX using memory-mapped FIFO window Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 08/15] serial: 8250_mxpcie: speed up TX " Crescent Hsieh
2026-07-01 12:36 ` Andy Shevchenko
2026-07-01 3:41 ` [PATCH v2 09/15] serial: 8250_mxpcie: introduce per-port private data structure Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 10/15] serial: 8250_mxpcie: defer uart_write_wakeup() to workqueue Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 11/15] serial: 8250_mxpcie: support serial interface mode switching Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 12/15] serial: 8250: allow low-level drivers to override break control Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 13/15] serial: 8250_mxpcie: add break support for RS485 using MUEx50 features Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 14/15] serial: 8250: allow UART drivers to override rx_trig_bytes handling Crescent Hsieh
2026-07-01 3:41 ` [PATCH v2 15/15] serial: 8250_mxpcie: implement rx_trig_bytes callbacks via MUEx50 RTL Crescent Hsieh
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260701034128.218569-3-crescentcy.hsieh@moxa.com \
--to=crescentcy.hsieh@moxa.com \
--cc=Epson.Chiang@moxa.com \
--cc=FangpingFP.Cheng@moxa.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=jirislaby@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox