* [PATCH] arm64: dts: imx8mm: Use 100 kHz I2C2 on Data Modul i.MX8M Mini eDM SBC
@ 2022-04-26 20:03 Marek Vasut
2022-05-05 3:52 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Marek Vasut @ 2022-04-26 20:03 UTC (permalink / raw)
To: linux-arm-kernel
Cc: Marek Vasut, Fabio Estevam, Peng Fan, Shawn Guo, NXP Linux Team
The I2C2 has SMBus device SMSC USB2514Bi connected to it, the device is
capable of up to 100 kHz operation. Reduce the bus frequency to 100 kHz
to guarantee this I2C device can work correctly.
Fixes: 583f24ae42a07 ("arm64: dts: imx8mm: Add support for Data Modul i.MX8M Mini eDM SBC")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
To: linux-arm-kernel@lists.infradead.org
---
arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc.dts b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc.dts
index b2d90b79f500..8c9dd09dbc74 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-data-modul-edm-sbc.dts
@@ -392,7 +392,7 @@ ldo6_reg: LDO6 {
&i2c2 {
/* IMX8MM ERRATA e7805 -- I2C is limited to 384 kHz due to SoC bug */
- clock-frequency = <320000>;
+ clock-frequency = <100000>;
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_i2c2>;
pinctrl-1 = <&pinctrl_i2c2_gpio>;
--
2.35.1
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2022-04-26 20:03 [PATCH] arm64: dts: imx8mm: Use 100 kHz I2C2 on Data Modul i.MX8M Mini eDM SBC Marek Vasut
2022-05-05 3:52 ` Shawn Guo
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