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From: "Paweł Anikiel" <pan@semihalf.com>
To: jarkko.nikula@linux.intel.com, andriy.shevchenko@linux.intel.com,
	mika.westerberg@linux.intel.com, robh+dt@kernel.org,
	p.zabel@pengutronix.de, arnd@arndb.de, olof@lixom.net,
	soc@kernel.org, dinguyen@kernel.org, p.yadav@ti.com,
	Tudor.Ambarus@microchip.com
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
	alexandre.belloni@bootlin.com, sre@kernel.org,
	thunder.leizhen@huawei.com, Jonathan.Cameron@huawei.com,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	ka@semihalf.com, tn@semihalf.com, jam@semihalf.com,
	amstan@google.com, "Paweł Anikiel" <pan@semihalf.com>
Subject: [PATCH v2 2/4] dt-bindings: add bus number property
Date: Tue,  5 Oct 2021 16:37:46 +0200	[thread overview]
Message-ID: <20211005143748.2471647-3-pan@semihalf.com> (raw)
In-Reply-To: <20211005143748.2471647-1-pan@semihalf.com>

On SoCFPGA systems, it's desireable to have fixed numbering for
i2c busses, while being able to enable/disable them (e.g. have i2c1
be mapped to /dev/i2c-1, even though i2c0 is disabled). This can also
be achieved using devicetree aliases (see i2c_add_adapter). However,
having the driver be self-contained without relying on aliases is more
robust.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
---
 .../devicetree/bindings/i2c/snps,designware-i2c.yaml         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
index d9293c57f573..1e02ddcbd690 100644
--- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
@@ -93,6 +93,11 @@ properties:
       - const: tx
       - const: rx
 
+  busno:
+    description: |
+      The property should contain the desired bus number (as opposed to
+      being assigned automatically)
+
 unevaluatedProperties: false
 
 required:
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: "Paweł Anikiel" <pan@semihalf.com>
To: jarkko.nikula@linux.intel.com, andriy.shevchenko@linux.intel.com,
	mika.westerberg@linux.intel.com, robh+dt@kernel.org,
	p.zabel@pengutronix.de, arnd@arndb.de, olof@lixom.net,
	soc@kernel.org, dinguyen@kernel.org, p.yadav@ti.com,
	Tudor.Ambarus@microchip.com
Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
	alexandre.belloni@bootlin.com, sre@kernel.org,
	thunder.leizhen@huawei.com, Jonathan.Cameron@huawei.com,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	ka@semihalf.com, tn@semihalf.com, jam@semihalf.com,
	amstan@google.com, "Paweł Anikiel" <pan@semihalf.com>
Subject: [PATCH v2 2/4] dt-bindings: add bus number property
Date: Tue,  5 Oct 2021 16:37:46 +0200	[thread overview]
Message-ID: <20211005143748.2471647-3-pan@semihalf.com> (raw)
Message-ID: <20211005143746.xE5rCkt-P_XlNkn9bJ8ZqYPY4nQQ7doqzSd4FrAlICY@z> (raw)
In-Reply-To: <20211005143748.2471647-1-pan@semihalf.com>

On SoCFPGA systems, it's desireable to have fixed numbering for
i2c busses, while being able to enable/disable them (e.g. have i2c1
be mapped to /dev/i2c-1, even though i2c0 is disabled). This can also
be achieved using devicetree aliases (see i2c_add_adapter). However,
having the driver be self-contained without relying on aliases is more
robust.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
---
 .../devicetree/bindings/i2c/snps,designware-i2c.yaml         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
index d9293c57f573..1e02ddcbd690 100644
--- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
@@ -93,6 +93,11 @@ properties:
       - const: tx
       - const: rx
 
+  busno:
+    description: |
+      The property should contain the desired bus number (as opposed to
+      being assigned automatically)
+
 unevaluatedProperties: false
 
 required:
-- 
2.25.1


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

  parent reply	other threads:[~2021-10-05 14:38 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05 14:37 [PATCH v2 0/4] Add support for the Mercury+ AA1 module Paweł Anikiel
2021-10-05 14:37 ` Paweł Anikiel
2021-10-05 14:37 ` [PATCH v2 1/4] i2c: check bus number property in DesignWare I2C Controller Paweł Anikiel
2021-10-05 14:37   ` Paweł Anikiel
2021-10-05 16:19   ` Andy Shevchenko
2021-10-05 16:19     ` Andy Shevchenko
2021-10-05 14:37 ` Paweł Anikiel [this message]
2021-10-14 16:46   ` [PATCH v2 2/4] dt-bindings: add bus number property Rob Herring
2021-10-14 16:46     ` Rob Herring
2021-10-05 14:37 ` Paweł Anikiel
2021-10-05 14:37   ` Paweł Anikiel
2021-10-05 16:22   ` Arnd Bergmann
2021-10-05 16:22     ` Arnd Bergmann
2021-10-05 16:28     ` Alexandre Belloni
2021-10-05 16:28       ` Alexandre Belloni
2021-10-06  9:21       ` Paweł Anikiel
2021-10-06  9:41         ` Arnd Bergmann
2021-10-06  9:41           ` Arnd Bergmann
2021-10-06  9:29       ` Paweł Anikiel
2021-10-06  9:29         ` Paweł Anikiel
2021-10-05 14:37 ` [PATCH v2 3/4] reset: socfpga: add empty driver allowing consumers to probe Paweł Anikiel
2021-10-05 14:37   ` Paweł Anikiel
2021-10-05 14:37 ` [PATCH v2 4/4] dts: socfpga: Add Mercury+ AA1 devicetree Paweł Anikiel
2021-10-05 14:37   ` Paweł Anikiel

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