All of lore.kernel.org
 help / color / mirror / Atom feed
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


WARNING: multiple messages have this Message-ID (diff)
From: mani@kernel.org
To: gregkh@linuxfoundation.org, robh+dt@kernel.org,
	mcoquelin.stm32@gmail.com, alexandre.torgue@st.com
Cc: devicetree@vger.kernel.org,
	Manivannan Sadhasivam <mani@kernel.org>,
	linux-kernel@vger.kernel.org, andy.shevchenko@gmail.com,
	linux-serial@vger.kernel.org, fabrice.gasnier@st.com,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.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


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-04-20 17:02 UTC|newest]

Thread overview: 18+ 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
2020-04-20 17:02 ` mani [this message]
2020-04-20 17:02   ` [PATCH v3 1/2] dt-bindings: serial: Document CTS/RTS gpios in " mani
2020-05-06 19:59   ` Rob Herring
2020-05-06 19:59     ` Rob Herring
2020-05-18  7:04   ` Geert Uytterhoeven
2020-05-18  7:04     ` Geert Uytterhoeven
2020-05-18  7:25     ` [Linux-stm32] " Erwan LE RAY
2020-05-18  7:25       ` Erwan LE RAY
2020-04-20 17:02 ` [PATCH v3 2/2] tty: serial: Add modem control gpio support for " mani
2020-04-20 17:02   ` mani
2020-04-21 12:58   ` Fabrice Gasnier
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 14:07   ` Manivannan Sadhasivam
2020-05-07 15:34   ` Greg KH
2020-05-07 15:34     ` Greg KH

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200420170204.24541-2-mani@kernel.org \
    --to=mani@kernel.org \
    --cc=alexandre.torgue@st.com \
    --cc=andy.shevchenko@gmail.com \
    --cc=devicetree@vger.kernel.org \
    --cc=fabrice.gasnier@st.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-serial@vger.kernel.org \
    --cc=linux-stm32@st-md-mailman.stormreply.com \
    --cc=mcoquelin.stm32@gmail.com \
    --cc=robh+dt@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.