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From: "Pali Rohár" <pali@kernel.org>
To: Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
	"Gregory Clement" <gregory.clement@bootlin.com>,
	"Sebastian Hesselbarth" <sebastian.hesselbarth@gmail.com>,
	"Vladimir Vid" <vladimir.vid@sartura.hr>,
	"Marek Behún" <kabel@kernel.org>,
	linux-clk@vger.kernel.org, linux-serial@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v6 4/6] dt-bindings: mvebu-uart: update information about UART clock
Date: Wed, 29 Sep 2021 10:20:32 +0200	[thread overview]
Message-ID: <20210929082034.15098-5-pali@kernel.org> (raw)
In-Reply-To: <20210929082034.15098-1-pali@kernel.org>

Device "marvell,armada-3700-uart" should use
"marvell,armada-3700-uart-clock" compatible clock.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 Documentation/devicetree/bindings/serial/mvebu-uart.txt | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
index 2d0dbdf32d1d..a062bbca532c 100644
--- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
@@ -14,7 +14,10 @@ Required properties:
       is provided (possible only with the "marvell,armada-3700-uart"
       compatible string for backward compatibility), it will only work
       if the baudrate was initialized by the bootloader and no baudrate
-      change will then be possible.
+      change will then be possible. When provided it should be UART1-clk
+      for standard variant of UART and UART2-clk for extended variant
+      of UART. TBG clock (with UART TBG divisors d1=d2=1) or xtal clock
+      should not be used and are supported only for backward compatibility.
 - interrupts:
     - Must contain three elements for the standard variant of the IP
       (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx",
@@ -34,7 +37,7 @@ Example:
 	uart0: serial@12000 {
 		compatible = "marvell,armada-3700-uart";
 		reg = <0x12000 0x18>;
-		clocks = <&xtalclk>;
+		clocks = <&uartclk 0>;
 		interrupts =
 		<GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
 		<GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
@@ -45,7 +48,7 @@ Example:
 	uart1: serial@12200 {
 		compatible = "marvell,armada-3700-uart-ext";
 		reg = <0x12200 0x30>;
-		clocks = <&xtalclk>;
+		clocks = <&uartclk 1>;
 		interrupts =
 		<GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
 		<GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
-- 
2.20.1


  parent reply	other threads:[~2021-09-29  8:23 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-29  8:20 [PATCH v6 0/6] serial: mvebu-uart: Support for higher baudrates Pali Rohár
2021-09-29  8:20 ` [PATCH v6 1/6] math64: New DIV_U64_ROUND_CLOSEST helper Pali Rohár
2021-09-29  8:20 ` [PATCH v6 2/6] serial: mvebu-uart: implement UART clock driver for configuring UART base clock Pali Rohár
2021-09-29  8:20 ` [PATCH v6 3/6] dt-bindings: mvebu-uart: document DT bindings for marvell,armada-3700-uart-clock Pali Rohár
2021-09-29 13:46   ` Rob Herring
2021-09-29 14:01     ` Pali Rohár
2021-09-29 21:30       ` Rob Herring
2021-09-29  8:20 ` Pali Rohár [this message]
2021-09-29  8:20 ` [PATCH v6 5/6] arm64: dts: marvell: armada-37xx: add device node for UART clock and use it Pali Rohár
2021-09-29  8:20 ` [PATCH v6 6/6] serial: mvebu-uart: implement support for baudrates higher than 230400 Pali Rohár

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