linux-kernel - [PATCH 14/19] serial: sh-sci: Add finish_console

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Message-ID: <20251027154615.115759-15-biju.das.jz@bp.renesas.com>
Date: Mon, 27 Oct 2025 15:46:01 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>
Cc: Biju Das <biju.das.jz@...renesas.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
	Nam Cao <namcao@...utronix.de>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	Biju Das <biju.das.au@...il.com>,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH 14/19] serial: sh-sci: Add finish_console_write() callback

Add finish_console_write() callback as RZ/G3E RSCI IP needs special
handling compared to other SoCs.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
 drivers/tty/serial/sh-sci-common.h | 1 +
 drivers/tty/serial/sh-sci.c        | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sh-sci-common.h b/drivers/tty/serial/sh-sci-common.h
index a3f4a76cdecb..2e97aad390d9 100644
--- a/drivers/tty/serial/sh-sci-common.h
+++ b/drivers/tty/serial/sh-sci-common.h
@@ -95,6 +95,7 @@ struct sci_port_ops {
 	void (*shutdown_complete)(struct uart_port *port);
 
 	void (*prepare_console_write)(struct uart_port *port, u32 ctrl);
+	void (*finish_console_write)(struct uart_port *port, u32 ctrl);
 	void (*console_save)(struct uart_port *port);
 	void (*console_restore)(struct uart_port *port);
 	size_t (*suspend_regs_size)(void);
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index e478286229f6..7d1c8338f36c 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -3265,7 +3265,10 @@ static void serial_console_write(struct console *co, const char *s,
 		cpu_relax();
 
 	/* restore the SCSCR */
-	sci_port->ops->write_reg(port, regs->control, ctrl);
+	if (sci_port->ops->finish_console_write)
+		sci_port->ops->finish_console_write(port, ctrl);
+	else
+		sci_port->ops->write_reg(port, regs->control, ctrl);
 
 	if (locked)
 		uart_port_unlock_irqrestore(port, flags);
-- 
2.43.0