linux-kernel - [PATCH v4 11/16] serial: sh-sci: Add RSCI_PORT

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Message-ID: <20251125150632.299890-12-biju.das.jz@bp.renesas.com>
Date: Tue, 25 Nov 2025 15:06:13 +0000
From: Biju <biju.das.au@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>
Cc: Biju Das <biju.das.jz@...renesas.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.au@...il.com>
Subject: [PATCH v4 11/16] serial: sh-sci: Add RSCI_PORT_SCIF32 port ID

From: Biju Das <biju.das.jz@...renesas.com>

The RZ/G3E RSCI IP has 32-stage FIFO compared to 16-stage FIFO on RZ/T2H.
Add RSCI_PORT_SCIF32 port ID to differentiate it from RZ/T2H RSCI and
update sci_is_rsci_type() and sci_is_fifo_type()

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
v3->v4:
 * Dropped enum RSCI_PORT_SCI
 * Replaced the enum RSCI_PORT_SCIF->RSCI_PORT_SCIF32
 * Moved rx_trigger update to later patch.
v2->v3:
 * No change.
v1->v2:
 * No change.
---
 drivers/tty/serial/sh-sci-common.h | 1 +
 drivers/tty/serial/sh-sci.c        | 5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/sh-sci-common.h b/drivers/tty/serial/sh-sci-common.h
index 1b9480c7f4cb..abcd5bcc7c36 100644
--- a/drivers/tty/serial/sh-sci-common.h
+++ b/drivers/tty/serial/sh-sci-common.h
@@ -8,6 +8,7 @@
 /* Private port IDs */
 enum SCI_PORT_TYPE {
 	RSCI_PORT_SCIF16 = BIT(7) | 0,
+	RSCI_PORT_SCIF32 = BIT(7) | 1,
 };
 
 enum SCI_CLKS {
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 08a1898f14ea..9afc3b8aae91 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1184,7 +1184,7 @@ static int sci_handle_errors(struct uart_port *port)
 
 static bool sci_is_rsci_type(u8 type)
 {
-	return (type == RSCI_PORT_SCIF16);
+	return (type == RSCI_PORT_SCIF16 || type == RSCI_PORT_SCIF32);
 }
 
 static int sci_handle_fifo_overrun(struct uart_port *port)
@@ -3548,7 +3548,8 @@ static struct uart_driver sci_uart_driver = {
 static bool sci_is_fifo_type(u8 type)
 {
 	return (type == PORT_SCIFA || type == PORT_SCIFB ||
-		type == PORT_HSCIF || type == RSCI_PORT_SCIF16);
+		type == PORT_HSCIF || type == RSCI_PORT_SCIF16 ||
+		type == RSCI_PORT_SCIF32);
 }
 
 static void sci_remove(struct platform_device *dev)
-- 
2.43.0