From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Joel Stanley <joel@jms.id.au>
Cc: linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org,
devicetree@vger.kernel.org, Andrew Jeffery <andrew@aj.id.au>,
linux-kernel@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: [PATCH 11/14] dt-bindings: fsi: Document binding for the fsi-master-ast-cf "device"
Date: Wed, 27 Jun 2018 09:26:02 +1000 [thread overview]
Message-ID: <20180626232605.13420-12-benh@kernel.crashing.org> (raw)
In-Reply-To: <20180626232605.13420-1-benh@kernel.crashing.org>
This isn't per-se a real device, it's a pseudo-device that
represents the use of the Aspeed built-in ColdFire to
implement the FSI protocol by bitbanging the GPIOs instead
of doing it from the ARM core.
Thus it's a drop-in replacement for the existing
fsi-master-gpio pseudo-device for use on systems for which
a corresponding firmware file exists. It has most of the
same properties, plus some more needed to operate the
coprocessor.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
.../bindings/fsi/fsi-master-ast-cf.txt | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt
diff --git a/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt b/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt
new file mode 100644
index 000000000000..50913ae685cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/fsi/fsi-master-ast-cf.txt
@@ -0,0 +1,36 @@
+Device-tree bindings for ColdFire offloaded gpio-based FSI master driver
+------------------------------------------------------------------------
+
+Required properties:
+ - compatible =
+ "fsi-master-ast-2400-cf" for an AST2400 based system
+ or
+ "fsi-master-ast-2500-cf" for an AST2500 based system
+
+ - clock-gpios = <gpio-descriptor>; : GPIO for FSI clock
+ - data-gpios = <gpio-descriptor>; : GPIO for FSI data signal
+ - enable-gpios = <gpio-descriptor>; : GPIO for enable signal
+ - trans-gpios = <gpio-descriptor>; : GPIO for voltage translator enable
+ - mux-gpios = <gpio-descriptor>; : GPIO for pin multiplexing with other
+ functions (eg, external FSI masters)
+ - memory-region = <phandle>; : Reference to the reserved memory for
+ the ColdFire. Must be 2M aligned on
+ AST2400 and 1M aligned on AST2500
+ - sram = <phandle>; : Reference to the SRAM node.
+ - cvic = <phandle>; : Reference to the CVIC node.
+ - fw-name = <string>; : The name used to construct the firmware
+ file name (cf-fsi-<name>.bin)
+ - fw-platform-sig = <value>; : A signature value that must match the one
+ contained in the firmware image. Known
+ values are listed in the firmware interface
+ file cf-fsi-fw.h
+Examples:
+
+ fsi-master {
+ compatible = "fsi-master-gpio", "fsi-master";
+ clock-gpios = <&gpio 0>;
+ data-gpios = <&gpio 1>;
+ enable-gpios = <&gpio 2>;
+ trans-gpios = <&gpio 3>;
+ mux-gpios = <&gpio 4>;
+ }
--
2.17.1
next prev parent reply other threads:[~2018-06-27 0:49 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-26 23:25 [PATCH 00/14] fsi: Fixes and Coldfire coprocessor offload Benjamin Herrenschmidt
2018-06-26 23:25 ` [PATCH 01/14] devres: Add devm_of_iomap() Benjamin Herrenschmidt
2018-06-26 23:25 ` [PATCH 02/14] fsi: Move code around to avoid forward declaration Benjamin Herrenschmidt
2018-06-26 23:25 ` [PATCH 03/14] fsi: Add mechanism to set the tSendDelay and tEchoDelay values Benjamin Herrenschmidt
2018-06-28 4:10 ` Joel Stanley
2018-06-26 23:25 ` [PATCH 04/14] fsi: master-gpio: Rename and adjust send delay Benjamin Herrenschmidt
2018-06-26 23:25 ` [PATCH 05/14] fsi: master-gpio: Add support for link_config Benjamin Herrenschmidt
2018-06-28 4:11 ` Joel Stanley
2018-06-26 23:25 ` [PATCH 06/14] fsi: master-gpio: Add more tracepoints Benjamin Herrenschmidt
2018-06-28 4:11 ` Joel Stanley
2018-07-12 2:01 ` Benjamin Herrenschmidt
2018-06-26 23:25 ` [PATCH 07/14] fsi: master-gpio: Remove unused definitions Benjamin Herrenschmidt
2018-06-28 4:11 ` Joel Stanley
2018-06-26 23:25 ` [PATCH 08/14] fsi: master-gpio: Remove "GPIO" prefix on some definitions Benjamin Herrenschmidt
2018-06-28 4:11 ` Joel Stanley
2018-06-26 23:26 ` [PATCH 09/14] fsi: master-gpio: Add missing release function Benjamin Herrenschmidt
2018-06-28 4:12 ` Joel Stanley
2018-06-26 23:26 ` [PATCH 10/14] fsi: Move various master definitions to a common header Benjamin Herrenschmidt
2018-06-28 4:12 ` Joel Stanley
2018-06-26 23:26 ` Benjamin Herrenschmidt [this message]
2018-06-28 4:12 ` [PATCH 11/14] dt-bindings: fsi: Document binding for the fsi-master-ast-cf "device" Joel Stanley
2018-07-03 22:30 ` Rob Herring
2018-07-04 1:16 ` Benjamin Herrenschmidt
2018-07-05 16:08 ` Rob Herring
2018-07-07 1:50 ` Benjamin Herrenschmidt
2018-06-26 23:26 ` [PATCH 12/14] fsi: master-ast-cf: Add new FSI master using Aspeed ColdFire Benjamin Herrenschmidt
2018-06-28 5:03 ` Joel Stanley
2018-06-26 23:26 ` [PATCH 13/14] arm: dts: OpenPower Romulus system can use coprocessor for FSI Benjamin Herrenschmidt
2018-06-28 4:12 ` Joel Stanley
2018-06-26 23:26 ` [PATCH 14/14] arm: dts: OpenPower Palmetto " Benjamin Herrenschmidt
2018-06-28 4:13 ` Joel Stanley
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