From: Fabio Estevam <festevam@gmail.com>
To: shawnguo@kernel.org
Cc: linux-arm-kernel@lists.infradead.org, andrew@lunn.ch,
Fabio Estevam <festevam@gmail.com>,
linux-imx@nxp.com, kernel@pengutronix.de
Subject: [PATCH 3/4] ARM: dts: imx6ul-14x14-evk: Describe the KSZ8081 reset
Date: Thu, 7 Jan 2021 20:50:43 -0300 [thread overview]
Message-ID: <20210107235044.7897-3-festevam@gmail.com> (raw)
In-Reply-To: <20210107235044.7897-1-festevam@gmail.com>
There are two KSZ8081 on the imx6ul-14x14-evk: one has the reset line
controlled by the Q1 output of the 74LV595PW expander, and the other
by the Q2 output.
The KSZ8081 datasheet states that the tsr parameter (Stable supply
voltage (VDDIO, VDDA_3.3) to reset high) to be 10ms minimum and
"After the de-assertion of reset, wait a minimum of 100 µs before
starting programming on the MIIM (MDC/MDIO) interface."
Describe these parameters in the devicetree.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
arch/arm/boot/dts/imx6ul-14x14-evk.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi b/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
index 8bf845afd166..ac2ec96f54e7 100644
--- a/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
+++ b/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
@@ -175,6 +175,10 @@
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET_REF>;
clock-names = "rmii-ref";
+ reset-gpios = <&gpio_spi 1 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <100>;
+
};
ethphy1: ethernet-phy@1 {
@@ -183,6 +187,9 @@
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET2_REF>;
clock-names = "rmii-ref";
+ reset-gpios = <&gpio_spi 2 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <100>;
};
};
};
--
2.17.1
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next prev parent reply other threads:[~2021-01-07 23:52 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-07 23:50 [PATCH 1/4] ARM: dts: imx6ul-14x14-evk: Fix SPI chipselect polarity Fabio Estevam
2021-01-07 23:50 ` [PATCH 2/4] ARM: dts: imx6ul-14x14-evk: Enable the GPIO expander Fabio Estevam
2021-01-08 1:02 ` Andrew Lunn
2021-01-18 0:10 ` Shawn Guo
2021-01-07 23:50 ` Fabio Estevam [this message]
2021-01-08 1:03 ` [PATCH 3/4] ARM: dts: imx6ul-14x14-evk: Describe the KSZ8081 reset Andrew Lunn
2021-01-18 0:10 ` Shawn Guo
2021-03-10 11:04 ` Joakim Zhang
2021-03-11 11:33 ` Joakim Zhang
2021-03-11 14:17 ` Andrew Lunn
2021-03-12 2:02 ` Joakim Zhang
2021-03-12 11:34 ` Fabio Estevam
2021-01-07 23:50 ` [PATCH 4/4] ARM: dts: imx6ul-14x14-evk: Add camera support Fabio Estevam
2021-01-18 0:11 ` Shawn Guo
2021-01-18 0:09 ` [PATCH 1/4] ARM: dts: imx6ul-14x14-evk: Fix SPI chipselect polarity Shawn Guo
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