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[86.162.200.138]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42cb7fba201sm34797809f8f.32.2025.11.25.07.06.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Nov 2025 07:06:44 -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 v4 12/16] serial: sh-sci: Add support for RZ/G3E RSCI clks Date: Tue, 25 Nov 2025 15:06:14 +0000 Message-ID: <20251125150632.299890-13-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251125150632.299890-1-biju.das.jz@bp.renesas.com> References: <20251125150632.299890-1-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 RZ/G3E RSCI has 6 clocks (5 module clocks + 1 external clock). Add support for the module clocks. Signed-off-by: Biju Das --- v3->v4: * Replaced clock name of RZ/G3E from bus->pclk * Rearranged clocks tclk{4,16,64}. * Reduced the checks in sci_init_clocks() by avoid looking up clocks that are not relevant for the port. v2->v3: * No change. v1->v2: * Updated commit description. --- drivers/tty/serial/sh-sci-common.h | 3 +++ drivers/tty/serial/sh-sci.c | 10 ++++++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/tty/serial/sh-sci-common.h b/drivers/tty/serial/sh-sci= -common.h index abcd5bcc7c36..5d30771278b4 100644 --- a/drivers/tty/serial/sh-sci-common.h +++ b/drivers/tty/serial/sh-sci-common.h @@ -16,6 +16,9 @@ enum SCI_CLKS { SCI_SCK, /* Optional External Clock */ SCI_BRG_INT, /* Optional BRG Internal Clock Source */ SCI_SCIF_CLK, /* Optional BRG External Clock Source */ + SCI_FCK_DIV4, /* Optional Functional Clock frequency-divided by 4 */ + SCI_FCK_DIV16, /* Optional Functional Clock frequency-divided by 16 */ + SCI_FCK_DIV64, /* Optional Functional Clock frequency-divided by 64 */ SCI_NUM_CLKS }; =20 diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 9afc3b8aae91..d7c25635bb2a 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -3172,6 +3172,9 @@ static int sci_init_clocks(struct sci_port *sci_port,= struct device *dev) [SCI_SCK] =3D "sck", [SCI_BRG_INT] =3D "brg_int", [SCI_SCIF_CLK] =3D "scif_clk", + [SCI_FCK_DIV4] =3D "tclk_div4", + [SCI_FCK_DIV16] =3D "tclk_div16", + [SCI_FCK_DIV64] =3D "tclk_div64", }; struct clk *clk; unsigned int i; @@ -3181,6 +3184,9 @@ static int sci_init_clocks(struct sci_port *sci_port,= struct device *dev) } else if (sci_port->type =3D=3D RSCI_PORT_SCIF16) { clk_names[SCI_FCK] =3D "operation"; clk_names[SCI_BRG_INT] =3D "bus"; + } else if (sci_port->type =3D=3D RSCI_PORT_SCIF32) { + clk_names[SCI_FCK] =3D "tclk"; + clk_names[SCI_BRG_INT] =3D "pclk"; } =20 for (i =3D 0; i < SCI_NUM_CLKS; i++) { @@ -3194,6 +3200,10 @@ static int sci_init_clocks(struct sci_port *sci_port= , struct device *dev) (i =3D=3D SCI_FCK || i =3D=3D SCI_BRG_INT)) return dev_err_probe(dev, -ENODEV, "failed to get %s\n", name); =20 + if (!clk && sci_port->type =3D=3D RSCI_PORT_SCIF32 && + (i !=3D SCI_SCK && i !=3D SCI_SCIF_CLK)) + return dev_err_probe(dev, -ENODEV, "failed to get %s\n", name); + if (!clk && i =3D=3D SCI_FCK) { /* * Not all SH platforms declare a clock lookup entry --=20 2.43.0