On 3/5/21 7:53 PM, Rob Herring wrote:

On Tue, Feb 09, 2021 at 10:59:48AM +0100, Valentin Caron wrote:

quoted

From: Valentin Caron <redacted>

Add examples to show more use cases :
  - uart2 with hardware flow control
  - uart4 without flow control

Why do I need these? I can go read your dts files if I need more
examples.

Hi,

These examples were present in the dt-binding before the convertion to 
json :

https://patchwork.kernel.org/project/linux-arm-kernel/patch/20200122095558.22553-3-benjamin.gaignard@st.com/

Would you like a v2 with this precision ?
However this is not an essential patch, we can just drop it.

quoted

Signed-off-by: Valentin Caron <redacted>
---
  .../bindings/serial/st,stm32-uart.yaml        | 20 +++++++++++++++++++
  1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
index 06d5f251ec88..3a4aab5d1862 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml

@@ -82,6 +82,26 @@ additionalProperties: false
  examples:
    - |
      #include <dt-bindings/clock/stm32mp1-clks.h>
+
+    usart4: serial@40004c00 {
+      compatible = "st,stm32-uart";
+      reg = <0x40004c00 0x400>;
+      interrupts = <52>;
+      clocks = <&clk_pclk1>;
+      pinctrl-names = "default";
+      pinctrl-0 = <&pinctrl_usart4>;
+    };
+
+    usart2: serial@40004400 {
+      compatible = "st,stm32-uart";
+      reg = <0x40004400 0x400>;
+      interrupts = <38>;
+      clocks = <&clk_pclk1>;
+      st,hw-flow-ctrl;
+      pinctrl-names = "default";
+      pinctrl-0 = <&pinctrl_usart2 &pinctrl_usart2_rtscts>;
+    };
+
      usart1: serial@40011000 {
        compatible = "st,stm32-uart";
        reg = <0x40011000 0x400>;

-- 
2.17.1