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From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Magnus Damm <magnus.damm@gmail.com>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: linux-renesas-soc@vger.kernel.org,
	Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH/RFC 2/2] ARM: dts: r8a7779: Correct internal delay for i2c[123]
Date: Tue,  4 May 2021 16:41:25 +0200	[thread overview]
Message-ID: <73c96fd455df82ef04fd1db6d7dd79b4679f6c56.1620138979.git.geert+renesas@glider.be> (raw)
In-Reply-To: <cover.1620138979.git.geert+renesas@glider.be>

According to the R-Car H1 Hardware User's Manual Rev. 1.00, the LSI
internal delay for I2C instances 1 to 3 is 5 ns (typ.), which differs
from the default 50 ns as specified for instance 0.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
i2c[123] are not used in upstream DTS files.
---
 arch/arm/boot/dts/r8a7779.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7779.dtsi b/arch/arm/boot/dts/r8a7779.dtsi
index 3c5fcdfe16b87182..39fc58f32df61b9a 100644
--- a/arch/arm/boot/dts/r8a7779.dtsi
+++ b/arch/arm/boot/dts/r8a7779.dtsi
@@ -198,6 +198,7 @@ i2c1: i2c@ffc71000 {
 		interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7779_CLK_I2C1>;
 		power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
+		i2c-scl-internal-delay-ns = <5>;
 		status = "disabled";
 	};
 
@@ -209,6 +210,7 @@ i2c2: i2c@ffc72000 {
 		interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7779_CLK_I2C2>;
 		power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
+		i2c-scl-internal-delay-ns = <5>;
 		status = "disabled";
 	};
 
@@ -220,6 +222,7 @@ i2c3: i2c@ffc73000 {
 		interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7779_CLK_I2C3>;
 		power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;
+		i2c-scl-internal-delay-ns = <5>;
 		status = "disabled";
 	};
 
-- 
2.25.1


  parent reply	other threads:[~2021-05-04 14:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-04 14:41 [PATCH/RFC 0/2] ARM: dts: rcar-gen1: Correct internal delay for i2c[123] Geert Uytterhoeven
2021-05-04 14:41 ` [PATCH/RFC 1/2] ARM: dts: r8a7778: " Geert Uytterhoeven
2021-05-05  7:13   ` Wolfram Sang
2021-05-05  7:41     ` Geert Uytterhoeven
2021-05-04 14:41 ` Geert Uytterhoeven [this message]
2021-05-05  7:13   ` [PATCH/RFC 2/2] ARM: dts: r8a7779: " Wolfram Sang

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