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[v2,7/9] soc: samsung: Update the CHIP ID DT binding documentation

Message ID 20190718143044.25066-8-s.nawrocki@samsung.com (mailing list archive)
State New, archived
Headers show
Series [v2,1/9] soc: samsung: Add exynos chipid driver support | expand

Commit Message

Sylwester Nawrocki July 18, 2019, 2:30 p.m. UTC
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 v1 (RFC):
 - new patch
 .../devicetree/bindings/arm/samsung/exynos-chipid.txt  | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series


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.
 	chipid@10000000 {
 		compatible = "samsung,exynos4210-chipid";
 		reg = <0x10000000 0x100>;
+		samsung,asv-bin = <2>;