From: mani@kernel.org
To: gregkh@linuxfoundation.org, robh+dt@kernel.org,
mcoquelin.stm32@gmail.com, alexandre.torgue@st.com
Cc: linux-serial@vger.kernel.org, devicetree@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, fabrice.gasnier@st.com,
andy.shevchenko@gmail.com,
Manivannan Sadhasivam <mani@kernel.org>
Subject: [PATCH v3 1/2] dt-bindings: serial: Document CTS/RTS gpios in STM32 UART
Date: Mon, 20 Apr 2020 22:32:03 +0530 [thread overview]
Message-ID: <20200420170204.24541-2-mani@kernel.org> (raw)
In-Reply-To: <20200420170204.24541-1-mani@kernel.org>
From: Manivannan Sadhasivam <mani@kernel.org>
Document the use of CTS/RTS gpios for flow control in STM32 UART
controller. These properties can be used instead of 'st,hw-flow-ctrl'
for making use of any gpio pins for flow control instead of dedicated
pins. It should be noted that both CTS/RTS and 'st,hw-flow-ctrl'
properties cannot co-exist in a design.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
---
.../devicetree/bindings/serial/st,stm32-uart.yaml | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
index 238c44192d31..75b8521eb7cb 100644
--- a/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/st,stm32-uart.yaml
@@ -48,6 +48,12 @@ properties:
minItems: 1
maxItems: 2
+ cts-gpios:
+ maxItems: 1
+
+ rts-gpios:
+ maxItems: 1
+
wakeup-source: true
rs485-rts-delay: true
@@ -55,6 +61,14 @@ properties:
linux,rs485-enabled-at-boot-time: true
rs485-rx-during-tx: true
+if:
+ required:
+ - st,hw-flow-ctrl
+then:
+ properties:
+ cts-gpios: false
+ rts-gpios: false
+
required:
- compatible
- reg
--
2.17.1
next prev parent reply other threads:[~2020-04-20 17:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 17:02 [PATCH v3 0/2] Add CTS/RTS gpio support to STM32 UART mani
2020-04-20 17:02 ` mani [this message]
2020-05-06 19:59 ` [PATCH v3 1/2] dt-bindings: serial: Document CTS/RTS gpios in " Rob Herring
2020-05-18 7:04 ` Geert Uytterhoeven
2020-05-18 7:25 ` [Linux-stm32] " Erwan LE RAY
2020-04-20 17:02 ` [PATCH v3 2/2] tty: serial: Add modem control gpio support for " mani
2020-04-21 12:58 ` Fabrice Gasnier
2020-05-07 14:07 ` [PATCH v3 0/2] Add CTS/RTS gpio support to " Manivannan Sadhasivam
2020-05-07 15:34 ` Greg KH
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