From: Frank Rowand <frank.rowand@xxxxxxxxxxxxxx>
v2, changes from v1:
- The patch this documents was updated to make the serialN alias
optional instead of required.
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@xxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt | 15 +++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
Index: linux/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
===================================================================
--- linux.orig/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
+++ linux/Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt
@@ -27,11 +27,21 @@ Optional properties:
- dmas: Should contain dma specifiers for transmit and receive channels
- dma-names: Should contain "tx" for transmit and "rx" for receive channels
+Note: Each UART port should have an alias correctly numbered in the
+"aliases" node, according to serialN format, where N is the port number
+(non-negative decimal integer). If the aliases are not present then
+the port numbers will be 0..(number of UARTS - 1), assigned in the driver
+probe order.
+
Examples:
A uartdm v1.4 device with dma capabilities.
-serial@f991e000 {
+aliases {
+ serial0 = &serial0;
+};
+
+serial0: serial@f991e000 {
compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
reg = <0xf991e000 0x1000>;
interrupts = <0 108 0x0>;
@@ -43,7 +53,11 @@ serial@f991e000 {
A uartdm v1.3 device without dma capabilities and part of a GSBI complex.
-serial@19c40000 {
+aliases {
+ serial0 = &serial0;
+};
+
+serial0: serial@19c40000 {
compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
reg = <0x19c40000 0x1000>,
<0x19c00000 0x1000>;
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