From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: [PATCH v3 03/27] serial: sh-sci: Update DT binding documentation for external clock input Date: Mon, 14 Dec 2015 19:57:12 +0100 Message-ID: <1450119456-964-4-git-send-email-geert+renesas@glider.be> References: <1450119456-964-1-git-send-email-geert+renesas@glider.be> Return-path: In-Reply-To: <1450119456-964-1-git-send-email-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org To: Greg Kroah-Hartman , Simon Horman , Magnus Damm , Yoshinori Sato Cc: linux-serial@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven , devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org Amend the DT bindings to include the optional external clock on (H)SCI(F) and some SCIFA, where this pin can serve as a clock input, depending on board wiring. Clarify the use of the divided functional clock as a source for the sampling clock. Signed-off-by: Geert Uytterhoeven Acked-by: Greg Kroah-Hartman Cc: devicetree@vger.kernel.org --- v3: - Add Acked-by, - Clarify the use of the divided functional clock. --- Documentation/devicetree/bindings/serial/renesas,sci-serial.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt index 7091213f02513cda..31cc0631ef7ca22d 100644 --- a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt +++ b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt @@ -51,6 +51,11 @@ Required properties: - clocks: Must contain a phandle and clock-specifier pair for each entry in clock-names. - clock-names: Must contain "fck" for the SCIx UART functional clock. + Apart from the divided functional clock, there may be other possible + sources for the sampling clock, depending on SCIx variant. + On (H)SCI(F) and some SCIFA, an additional clock may be specified: + - "hsck" for the optional external clock input (on HSCIF), + - "sck" for the optional external clock input (on other variants). Note: Each enabled SCIx UART should have an alias correctly numbered in the "aliases" node. -- 1.9.1