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From:   Sylwester Nawrocki <s.nawrocki@samsung.com>
To:     krzk@kernel.org, vireshk@kernel.org
Cc:     robh+dt@kernel.org, kgene@kernel.org, devicetree@vger.kernel.org,
        linux-pm@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        b.zolnierkie@samsung.com, m.szyprowski@samsung.com,
        Sylwester Nawrocki <s.nawrocki@samsung.com>
Subject: [PATCH v4 2/6] dt-bindings: samsung: Update the CHIP ID binding
 documentation
Date:   Tue, 10 Sep 2019 14:36:14 +0200
Message-Id: <20190910123618.27985-3-s.nawrocki@samsung.com>
In-Reply-To: <20190910123618.27985-1-s.nawrocki@samsung.com>
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CMS-TYPE: 201P
References: <20190910123618.27985-1-s.nawrocki@samsung.com>
        <CGME20190910123637eucas1p26d2051f9bdd1bdf4510f1908ea98f641@eucas1p2.samsung.com>
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This patch adds documentation of a new optional "samsung,asv-bin"
property in the chipid device node and documents requirement of
"syscon" compatible string.  These additions are needed to support
Exynos ASV (Adaptive Supply Voltage) feature.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
Changes since v3:
 - none

Changes since v2:
 - corrected patch summary line prefix, the patch moved in the
   sequence

Changes since v1 (RFC):
 - new patch
---
 .../devicetree/bindings/arm/samsung/exynos-chipid.txt  | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
index 85c5dfd4a720..be3657e6c00c 100644
--- a/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
+++ b/Documentation/devicetree/bindings/arm/samsung/exynos-chipid.txt
@@ -1,12 +1,18 @@
-SAMSUNG Exynos SoCs Chipid driver.
+SAMSUNG Exynos SoC series CHIPID subsystem

 Required properties:
-- compatible : Should at least contain "samsung,exynos4210-chipid".
+- compatible : Should at least contain "samsung,exynos4210-chipid", "syscon".

 - reg: offset and length of the register set

+Optional properties:
+ - samsung,asv-bin : Adaptive Supply Voltage bin selection. This can be used
+   to determine the ASV bin of an SoC if respective information is missing
+   in the CHIPID registers or in the OTP memory. Possible values: 0...3.
+
 Example:
 	chipid@10000000 {
 		compatible = "samsung,exynos4210-chipid";
 		reg = <0x10000000 0x100>;
+		samsung,asv-bin = <2>;
 	};
--
2.17.1