linux-kernel - Re: [PATCH] tty: serial: msm

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Date:	Thu, 06 Nov 2014 20:44:15 -0800
From:	Frank Rowand <frowand.list@...il.com>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH] tty: serial: msm_serial: Use DT aliases

From: Frank Rowand <frank.rowand@...ymobile.com>

Update devicetree binding for msm_serial to reflect msm_serial_probe()
getting line id from the serial alias.

Signed-off-by: Frank Rowand <frank.rowand@...ymobile.com>
---
 Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt |   15 +++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

Index: b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
===================================================================
--- a/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
+++ b/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
@@ -27,11 +27,18 @@ Optional properties:
 - dmas: Should contain dma specifiers for transmit and receive channels
 - dma-names: Should contain "tx" for transmit and "rx" for receive channels
 
+Additional requirements:
+- Each UART port must have an alias correctly numbered in "aliases" node.
+
 Examples:
 
 A uartdm v1.4 device with dma capabilities.
 
-serial@...1e000 {
+aliases {
+	serial0 = &serial0;
+};
+
+serial0: serial@...1e000 {
 	compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
 	reg = <0xf991e000 0x1000>;
 	interrupts = <0 108 0x0>;
@@ -43,7 +50,11 @@ serial@...1e000 {
 
 A uartdm v1.3 device without dma capabilities and part of a GSBI complex.
 
-serial@...40000 {
+aliases {
+	serial0 = &serial0;
+};
+
+serial0: serial@...40000 {
 	compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
 	reg = <0x19c40000 0x1000>,
 	      <0x19c00000 0x1000>;
--
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