From: Neil Armstrong <narmstrong@baylibre.com>
To: hverkuil@xs4all.nl, mchehab@kernel.org, devicetree@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>,
Neil Armstrong <narmstrong@baylibre.com>,
linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: [PATCH v4 1/3] media: dt-bindings: media: meson-ao-cec: Add G12A AO-CEC-B Compatible
Date: Mon, 8 Apr 2019 14:18:03 +0200 [thread overview]
Message-ID: <20190408121805.2870-2-narmstrong@baylibre.com> (raw)
In-Reply-To: <20190408121805.2870-1-narmstrong@baylibre.com>
The Amlogic G12A embeds a second CEC controller named AO-CEC-B, and
the other one is AO-CEC-A described by the current bindings.
The register interface is very close but the internal architecture
is totally different.
The other difference is the clock source, the AO-CEC-B takes the
"oscin", the Always-On Oscillator clock, as input and embeds a
dual-divider clock divider to provide the precise 32768Hz base
clock for CEC communication.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/media/meson-ao-cec.txt | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/meson-ao-cec.txt b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
index 8671bdb08080..c67fc41d4aa2 100644
--- a/Documentation/devicetree/bindings/media/meson-ao-cec.txt
+++ b/Documentation/devicetree/bindings/media/meson-ao-cec.txt
@@ -4,16 +4,23 @@ The Amlogic Meson AO-CEC module is present is Amlogic SoCs and its purpose is
to handle communication between HDMI connected devices over the CEC bus.
Required properties:
- - compatible : value should be following
+ - compatible : value should be following depending on the SoC :
+ For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
"amlogic,meson-gx-ao-cec"
+ For G12A (AO_CEC_B module) :
+ "amlogic,meson-g12a-ao-cec"
- reg : Physical base address of the IP registers and length of memory
mapped region.
- interrupts : AO-CEC interrupt number to the CPU.
- clocks : from common clock binding: handle to AO-CEC clock.
- - clock-names : from common clock binding: must contain "core",
- corresponding to entry in the clocks property.
+ - clock-names : from common clock binding, must contain :
+ For GXBB, GXL, GXM and G12A (AO_CEC_A module) :
+ - "core"
+ For G12A (AO_CEC_B module) :
+ - "oscin"
+ corresponding to entry in the clocks property.
- hdmi-phandle: phandle to the HDMI controller
Example:
--
2.21.0
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next prev parent reply other threads:[~2019-04-08 12:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-08 12:18 [PATCH v4 0/3] media: platform: Add support for the Amlogic Meson G12A AO CEC Controller Neil Armstrong
2019-04-08 12:18 ` Neil Armstrong [this message]
2019-04-08 12:18 ` [PATCH v4 2/3] media: platform: meson: Add Amlogic Meson G12A AO CEC Controller driver Neil Armstrong
2019-04-09 7:41 ` Neil Armstrong
2019-04-08 12:18 ` [PATCH v4 3/3] MAINTAINERS: Update AO CEC with ao-cec-g12a driver Neil Armstrong
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