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[86.162.200.138]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42e1ca4078csm15970060f8f.29.2025.11.29.08.43.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 29 Nov 2025 08:43:30 -0800 (PST) From: Biju X-Google-Original-From: Biju To: Greg Kroah-Hartman , Jiri Slaby , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , Wolfram Sang , Lad Prabhakar , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Biju Das Subject: [PATCH v5 03/17] serial: rsci: Add set_rtrg() callback Date: Sat, 29 Nov 2025 16:42:59 +0000 Message-ID: <20251129164325.209213-4-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251129164325.209213-1-biju.das.jz@bp.renesas.com> References: <20251129164325.209213-1-biju.das.jz@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Biju Das The rtrg variable is populated in sci_init_single() for RZ/T2H. Add set_rtrg() callback for setting the rtrg value. Signed-off-by: Biju Das --- v5: * New patch. --- drivers/tty/serial/rsci.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/tty/serial/rsci.c b/drivers/tty/serial/rsci.c index b3c48dc1e07d..0533a4bb1d03 100644 --- a/drivers/tty/serial/rsci.c +++ b/drivers/tty/serial/rsci.c @@ -151,6 +151,22 @@ static void rsci_start_rx(struct uart_port *port) rsci_serial_out(port, CCR0, ctrl); } =20 +static int rsci_scif_set_rtrg(struct uart_port *port, int rx_trig) +{ + u32 fcr =3D rsci_serial_in(port, FCR); + + if (rx_trig >=3D port->fifosize) + rx_trig =3D port->fifosize - 1; + else if (rx_trig < 1) + rx_trig =3D 0; + + fcr &=3D ~FCR_RTRG4_0; + fcr |=3D field_prep(FCR_RTRG4_0, rx_trig); + rsci_serial_out(port, FCR, fcr); + + return rx_trig; +} + static void rsci_set_termios(struct uart_port *port, struct ktermios *term= ios, const struct ktermios *old) { @@ -454,6 +470,7 @@ static const struct sci_port_ops rsci_port_ops =3D { .poll_put_char =3D rsci_poll_put_char, .prepare_console_write =3D rsci_prepare_console_write, .suspend_regs_size =3D rsci_suspend_regs_size, + .set_rtrg =3D rsci_scif_set_rtrg, .shutdown_complete =3D rsci_shutdown_complete, }; =20 --=20 2.43.0