From: Adam Ford <aford173@gmail.com>
To: linux-renesas-soc@vger.kernel.org
Cc: geert+renesas@glider.be, devicetree@vger.kernel.org,
Adam Ford <aford173@gmail.com>
Subject: [PATCH] arm64: dts: renesas: beacon: Fix i2c2 speed calcuation
Date: Wed, 25 Aug 2021 07:27:57 -0500 [thread overview]
Message-ID: <20210825122757.91133-1-aford173@gmail.com> (raw)
The desired i2c2 speed is 400KHz, but when measured on a scope, it
is incorrect. The driver can use the i2c-scl-rising-time-ns to help
calculate the proper setting to get exactly 400KHz.
Fixes: 900d9fc3bece ("arm64: dts: renesas: beacon: Correct I2C bus speeds")
Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
index 2692cc64bff6..987357c58390 100644
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
@@ -328,6 +328,7 @@ &hsusb {
&i2c2 {
status = "okay";
clock-frequency = <400000>;
+ i2c-scl-rising-time-ns = <50>;
pinctrl-0 = <&i2c2_pins>;
pinctrl-names = "default";
--
2.25.1
next reply other threads:[~2021-08-25 12:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-25 12:27 Adam Ford [this message]
2021-08-25 12:47 ` [PATCH] arm64: dts: renesas: beacon: Fix i2c2 speed calcuation Geert Uytterhoeven
2021-09-14 10:41 ` Wolfram Sang
2021-09-20 12:25 ` Adam Ford
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