From: Tim Harvey <tharvey@gateworks.com>
To: Rob Herring <robh+dt@kernel.org>, Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: Tim Harvey <tharvey@gateworks.com>
Subject: [PATCH 4/5] arm64: dts: imx8mm-venice-gw7901: add support for USB hub subload
Date: Tue, 27 Jul 2021 09:11:00 -0700 [thread overview]
Message-ID: <20210727161101.32267-4-tharvey@gateworks.com> (raw)
In-Reply-To: <20210727161101.32267-1-tharvey@gateworks.com>
The USB hub has it's reset as GPIO4_IO17 but can be sub-loaded and
VBUS provided by a VBUS regulator with GPIO4_IO2 as the enable and
GPIO1_IO15 as the active-low over-current.
Enable pull-up for GPIO4_IO17 to keep hub out of reset and move VBUS
enable to GPIO4_IO2. Additionally enable pull-up on GPIO1_IO15 so that
if the hub is loaded it never over-currents.
This allows USB to work in both configurations without a device-tree
change.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---
arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
index 5a1e9df39bec..db43ee28bdb6 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
@@ -216,7 +216,7 @@
pinctrl-0 = <&pinctrl_reg_usb2>;
compatible = "regulator-fixed";
regulator-name = "usb_usb2_vbus";
- gpio = <&gpio4 17 GPIO_ACTIVE_HIGH>;
+ gpio = <&gpio4 2 GPIO_ACTIVE_HIGH>;
enable-active-high;
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
@@ -824,8 +824,9 @@
pinctrl_reg_usb2: regusb1grp {
fsl,pins = <
- MX8MM_IOMUXC_SAI1_TXD5_GPIO4_IO17 0x41
- MX8MM_IOMUXC_GPIO1_IO15_USB2_OTG_OC 0x41
+ MX8MM_IOMUXC_SAI1_RXD0_GPIO4_IO2 0x41
+ MX8MM_IOMUXC_SAI1_TXD5_GPIO4_IO17 0x140
+ MX8MM_IOMUXC_GPIO1_IO15_USB2_OTG_OC 0x140
>;
};
--
2.17.1
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next prev parent reply other threads:[~2021-07-27 16:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 16:10 [PATCH 1/5] arm64: dts: imx8mm-venice-gw700x: fix mp5416 pmic config Tim Harvey
2021-07-27 16:10 ` [PATCH 2/5] arm64: dts: imx8mm-venice-gw700x: fix invalid pmic pin config Tim Harvey
2021-07-27 16:10 ` [PATCH 3/5] arm64: dts: imx8mm-venice-gw71xx: fix USB OTG VBUS Tim Harvey
2021-07-27 16:11 ` Tim Harvey [this message]
2021-07-27 16:11 ` [PATCH 5/5] arm64: dts: imx8mm-venice-gw7901: enable pull-down on gpio outputs Tim Harvey
2021-08-04 9:24 ` [PATCH 1/5] arm64: dts: imx8mm-venice-gw700x: fix mp5416 pmic config Shawn Guo
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