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Message-Id: <20230810144451.1459985-7-alexander.stein@ew.tq-group.com>
Date: Thu, 10 Aug 2023 16:44:51 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Amit Kucheria <amitk@...nel.org>,
Zhang Rui <rui.zhang@...el.com>,
Thomas Gleixner <tglx@...utronix.de>
Cc: Alexander Stein <alexander.stein@...tq-group.com>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
NXP Linux Team <linux-imx@....com>,
dri-devel@...ts.freedesktop.org,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
netdev@...r.kernel.org,
linux-pm@...r.kernel.org
Subject: [PATCH 6/6] dt-bindings: timer: fsl,imxgpt: Add optional osc_per clock
Since commit bad3db104f89 ("ARM: imx: source gpt per clk from OSC for
system timer") osc_per can be used for clocking the GPT which is not
scaled when entering low bus mode.
This clock source is available only on i.MX6Q (incl. i.MX6QP) and i.MX6DL.
Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
---
Notes:
osc_per is only used in arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi, so I assume
this is the only platform supporting this source.
I had to use minItem:2 and maxItems:3 in the constraints as fsl,imx6sx-gpt
and fsl,imx6sl-gpt are also compatible to fsl,imx6dl-gpt, but only provide
two clocks. Maybe this the compatible list needs some cleanup, but I do
not know which hardware is compatible to what. The driver
drivers/clocksource/timer-imx-gpt.c also gives no clues because it's totally
mixed.
.../devicetree/bindings/timer/fsl,imxgpt.yaml | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
index c5d3be8c1d68..e2607377cbae 100644
--- a/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
+++ b/Documentation/devicetree/bindings/timer/fsl,imxgpt.yaml
@@ -48,14 +48,18 @@ properties:
maxItems: 1
clocks:
+ minItems: 2
items:
- description: SoC GPT ipg clock
- description: SoC GPT per clock
+ - description: SoC GPT osc per clock
clock-names:
+ minItems: 2
items:
- const: ipg
- const: per
+ - const: osc_per
required:
- compatible
@@ -64,6 +68,29 @@ required:
- clocks
- clock-names
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - fsl,imx6dl-gpt
+ - fsl,imx6q-gpt
+ then:
+ properties:
+ clocks:
+ minItems: 2
+ maxItems: 3
+ clock-names:
+ minItems: 2
+ maxItems: 3
+ else:
+ properties:
+ clocks:
+ maxItems: 2
+ clock-names:
+ maxItems: 2
+
additionalProperties: false
examples:
--
2.34.1
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