On 1/2/2018 8:55 AM, Rob Herring wrote:
On Wed, Dec 27, 2017 at 09:27:25AM -0700, Karthikeyan Ramasubramanian wrote:
Add device tree binding support for GENI based UART Controller in the
QUP Wrapper.
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@xxxxxxxxxxxxxx>
Signed-off-by: Girish Mahadevan <girishm@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/serial/qcom,geni-uart.txt | 31 ++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
diff --git a/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt b/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
new file mode 100644
index 0000000..e60ec6a
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/qcom,geni-uart.txt
@@ -0,0 +1,31 @@
+Qualcomm Technologies Inc. GENI based Serial UART Controller driver
+
+This serial UART driver supports console use-cases. This driver is meant
+only for Generic Interface (GENI) based Qualcomm Universal Peripheral (QUP)
+cores and isn't backwards compatible.
+
+Required properties:
+- compatible: should contain "qcom,geni-uart, qcom,geni-console"
Is console different programming model or just how you are using the
h/w? for the latter, drop it as we have stdout-path to select a console.
The console programming model is different from a regular UART port and
hence the compatible field contains console in it.
+- reg: Should contain UART register location and length.
+- interrupts: Should contain UART core interrupts.
+- clocks: clocks needed for UART, includes the core and AHB clock.
+- pinctrl-names/pinctrl-0/1: The GPIOs assigned to this core. The names
+ Should be "active" and "sleep" for the pin confuguration when core is active
+ or when entering sleep state.
+- qcom,wrapper-core: Wrapper QUP core containing this UART controller.
+
+Example:
+qup_uart11: qcom,qup_uart@0xa88000 {
Use generic node names and no '0x':
serial@a88000
I will update as per the recommendation.
+ compatible = "qcom,geni-uart";
+ reg = <0xa88000 0x7000>;
+ reg-names = "se_phys";
+ clock-names = "se-clk", "m-ahb", "s-ahb";
Not documented.
I will add the documentation for the missing element.
+ clocks = <&clock_gcc GCC_QUPV3_WRAP0_S0_CLK>,
+ <&clock_gcc GCC_QUPV3_WRAP_0_M_AHB_CLK>,
+ <&clock_gcc GCC_QUPV3_WRAP_0_S_AHB_CLK>;
+ pinctrl-names = "default", "sleep";
+ pinctrl-0 = <&qup_1_uart_3_active>;
+ pinctrl-1 = <&qup_1_uart_3_sleep>;
+ interrupts = <0 355 0>;
+ qcom,wrapper-core = <&qup_0>;
+};
--
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a Linux Foundation Collaborative Project
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Regards,
Karthik.
--
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