linux/arch/arm/boot/dts/sun7i-a20-bananapi.dts
Karsten Merker 9ce42e46b1 ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator
On the LeMaker Banana Pi, probing the external ethernet PHY connected
to the SoC's internal GMAC module sometimes fails. The PHY power
supply is handled via a GPIO-controlled regulator, and the existing
regulator startup-delay of 50000us is too short to make sure that the
PHY is always fully powered up when it is queried by phylib. Tests
have shown that to provide a reliable PHY detection, the startup-delay
has to be increased to at least 60000us. To have a certain safety margin
and to cater for manufacturing variations between different boards,
the delay gets set to 100000us as discussed on the linux-arm-kernel
mailinglist.

Signed-off-by: Karsten Merker <merker@debian.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2014-11-23 16:53:39 +01:00

215 lines
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/*
* Copyright 2014 Hans de Goede <hdegoede@redhat.com>
*
* Hans de Goede <hdegoede@redhat.com>
*
* This file is dual-licensed: you can use it either under the terms
* of the GPL or the X11 license, at your option. Note that this dual
* licensing only applies to this file, and not this project as a
* whole.
*
* a) This file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this file; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*
* Or, alternatively,
*
* b) Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
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* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
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*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* OTHER DEALINGS IN THE SOFTWARE.
*/
/dts-v1/;
/include/ "sun7i-a20.dtsi"
/include/ "sunxi-common-regulators.dtsi"
/ {
model = "LeMaker Banana Pi";
compatible = "lemaker,bananapi", "allwinner,sun7i-a20";
soc@01c00000 {
spi0: spi@01c05000 {
pinctrl-names = "default";
pinctrl-0 = <&spi0_pins_a>;
status = "okay";
};
mmc0: mmc@01c0f000 {
pinctrl-names = "default";
pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin_bananapi>;
vmmc-supply = <&reg_vcc3v3>;
bus-width = <4>;
cd-gpios = <&pio 7 10 0>; /* PH10 */
cd-inverted;
status = "okay";
};
usbphy: phy@01c13400 {
usb1_vbus-supply = <&reg_usb1_vbus>;
usb2_vbus-supply = <&reg_usb2_vbus>;
status = "okay";
};
ehci0: usb@01c14000 {
status = "okay";
};
ohci0: usb@01c14400 {
status = "okay";
};
ahci: sata@01c18000 {
status = "okay";
};
ehci1: usb@01c1c000 {
status = "okay";
};
ohci1: usb@01c1c400 {
status = "okay";
};
pinctrl@01c20800 {
mmc0_cd_pin_bananapi: mmc0_cd_pin@0 {
allwinner,pins = "PH10";
allwinner,function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};
gmac_power_pin_bananapi: gmac_power_pin@0 {
allwinner,pins = "PH23";
allwinner,function = "gpio_out";
allwinner,drive = <0>;
allwinner,pull = <0>;
};
led_pins_bananapi: led_pins@0 {
allwinner,pins = "PH24";
allwinner,function = "gpio_out";
allwinner,drive = <0>;
allwinner,pull = <0>;
};
};
ir0: ir@01c21800 {
pinctrl-names = "default";
pinctrl-0 = <&ir0_pins_a>;
status = "okay";
};
uart0: serial@01c28000 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_a>;
status = "okay";
};
uart3: serial@01c28c00 {
pinctrl-names = "default";
pinctrl-0 = <&uart3_pins_b>;
status = "okay";
};
uart7: serial@01c29c00 {
pinctrl-names = "default";
pinctrl-0 = <&uart7_pins_a>;
status = "okay";
};
i2c0: i2c@01c2ac00 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins_a>;
status = "okay";
axp209: pmic@34 {
compatible = "x-powers,axp209";
reg = <0x34>;
interrupt-parent = <&nmi_intc>;
interrupts = <0 8>;
interrupt-controller;
#interrupt-cells = <1>;
};
};
i2c2: i2c@01c2b400 {
pinctrl-names = "default";
pinctrl-0 = <&i2c2_pins_a>;
status = "okay";
};
gmac: ethernet@01c50000 {
pinctrl-names = "default";
pinctrl-0 = <&gmac_pins_rgmii_a>;
phy = <&phy1>;
phy-mode = "rgmii";
phy-supply = <&reg_gmac_3v3>;
status = "okay";
phy1: ethernet-phy@1 {
reg = <1>;
};
};
};
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
pinctrl-0 = <&led_pins_bananapi>;
green {
label = "bananapi:green:usr";
gpios = <&pio 7 24 0>;
};
};
reg_usb1_vbus: usb1-vbus {
status = "okay";
};
reg_usb2_vbus: usb2-vbus {
status = "okay";
};
reg_gmac_3v3: gmac-3v3 {
compatible = "regulator-fixed";
pinctrl-names = "default";
pinctrl-0 = <&gmac_power_pin_bananapi>;
regulator-name = "gmac-3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
startup-delay-us = <100000>;
enable-active-high;
gpio = <&pio 7 23 0>;
};
};