linux-kernel - [PATCH] serial: 8250_exar: add support for Advantech 2 port card with Device ID 0x0018

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Message-ID: <20250924134115.2667650-1-fe@dev.tdt.de>
Date: Wed, 24 Sep 2025 15:41:15 +0200
From: Florian Eckert <fe@....tdt.de>
To: gregkh@...uxfoundation.org, jirislaby@...nel.org,
	andriy.shevchenko@...ux.intel.com, pnewman@...necttech.com,
	angelogioacchino.delregno@...labora.com, peterz@...radead.org,
	yujiaoliang@...o.com, Eckert.Florian@...glemail.com
Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	Florian Eckert <fe@....tdt.de>
Subject: [PATCH] serial: 8250_exar: add support for Advantech 2 port card with Device ID 0x0018

The Advantech 2-port serial card with PCI vendor=0x13fe and device=0x0018
has a 'XR17V35X' chip installed on the circuit board. Therefore, this
driver can be used instead of theu outdated out-of-tree driver from the
manufacturer.

Signed-off-by: Florian Eckert <fe@....tdt.de>
---
 drivers/tty/serial/8250/8250_exar.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 3c16a849b474..c682c0d0dffa 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -40,6 +40,8 @@
 #define PCI_DEVICE_ID_ACCESSIO_COM_4SM		0x10db
 #define PCI_DEVICE_ID_ACCESSIO_COM_8SM		0x10ea
 
+#define PCI_DEVICE_ID_ADVANTECH_XR17V352	0x0018
+
 #define PCI_DEVICE_ID_COMMTECH_4224PCI335	0x0002
 #define PCI_DEVICE_ID_COMMTECH_4222PCI335	0x0004
 #define PCI_DEVICE_ID_COMMTECH_2324PCI335	0x000a
@@ -1622,6 +1624,12 @@ static const struct exar8250_board pbn_fastcom35x_8 = {
 	.exit		= pci_xr17v35x_exit,
 };
 
+static const struct exar8250_board pbn_adv_XR17V352 = {
+	.num_ports	= 2,
+	.setup		= pci_xr17v35x_setup,
+	.exit		= pci_xr17v35x_exit,
+};
+
 static const struct exar8250_board pbn_exar_XR17V4358 = {
 	.num_ports	= 12,
 	.setup		= pci_xr17v35x_setup,
@@ -1696,6 +1704,9 @@ static const struct pci_device_id exar_pci_tbl[] = {
 	USR_DEVICE(XR17C152, 2980, pbn_exar_XR17C15x),
 	USR_DEVICE(XR17C152, 2981, pbn_exar_XR17C15x),
 
+	/* ADVANTECH devices */
+	EXAR_DEVICE(ADVANTECH, XR17V352, pbn_adv_XR17V352),
+
 	/* Exar Corp. XR17C15[248] Dual/Quad/Octal UART */
 	EXAR_DEVICE(EXAR, XR17C152, pbn_exar_XR17C15x),
 	EXAR_DEVICE(EXAR, XR17C154, pbn_exar_XR17C15x),

base-commit: 07e27ad16399afcd693be20211b0dfae63e0615f
prerequisite-patch-id: d226b2363004eee0962a350752df5facc0637d96
-- 
2.39.5