On Sat, Sep 19, 2015 at 12:41:07AM +0800, Chen-Yu Tsai wrote: > On Fri, Sep 18, 2015 at 4:48 PM, Maxime Ripard > <[email protected]> wrote: > > The C.H.I.P. is a small SBC with an Allwinner R8, 8GB of NAND, 512MB of > > RAM, USB host and OTG, a wifi / bluetooth combo chip, an audio/video jack > > and two connectors to plug additional boards on top of it. > > > > Signed-off-by: Maxime Ripard <[email protected]> > > --- > > arch/arm/boot/dts/Makefile | 3 +- > > arch/arm/boot/dts/sun5i-r8-chip.dts | 261 > > ++++++++++++++++++++++++++++++++++++ > > 2 files changed, 263 insertions(+), 1 deletion(-) > > create mode 100644 arch/arm/boot/dts/sun5i-r8-chip.dts > > > > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile > > index b276174b670a..7efd37b907f1 100644 > > --- a/arch/arm/boot/dts/Makefile > > +++ b/arch/arm/boot/dts/Makefile > > @@ -599,7 +599,8 @@ dtb-$(CONFIG_MACH_SUN5I) += \ > > sun5i-a13-inet-98v-rev2.dtb \ > > sun5i-a13-olinuxino.dtb \ > > sun5i-a13-olinuxino-micro.dtb \ > > - sun5i-a13-utoo-p66.dtb > > + sun5i-a13-utoo-p66.dtb \ > > + sun5i-r8-chip.dtb > > dtb-$(CONFIG_MACH_SUN6I) += \ > > sun6i-a31-app4-evb1.dtb \ > > sun6i-a31-colombus.dtb \ > > diff --git a/arch/arm/boot/dts/sun5i-r8-chip.dts > > b/arch/arm/boot/dts/sun5i-r8-chip.dts > > new file mode 100644 > > index 000000000000..6cb3c4f1cd61 > > --- /dev/null > > +++ b/arch/arm/boot/dts/sun5i-r8-chip.dts > > @@ -0,0 +1,261 @@ > > +/* > > + * Copyright 2015 Free Electrons > > + * Copyright 2015 NextThing Co > > + * > > + * Maxime Ripard <[email protected]> > > + * > > + * 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. > > + * > > + * 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 > > + * restriction, including without limitation the rights to use, > > + * 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 > > + * conditions: > > + * > > + * The above copyright notice and this permission notice shall be > > + * included in all copies or substantial portions of the Software. > > + * > > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, > > + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES > > + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND > > + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT > > + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, > > + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING > > + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR > > + * OTHER DEALINGS IN THE SOFTWARE. > > + */ > > + > > +/dts-v1/; > > +#include "sun5i-a13.dtsi" > > + > > +#include <dt-bindings/gpio/gpio.h> > > +#include <dt-bindings/interrupt-controller/irq.h> > > + > > +/ { > > + model = "NextThing C.H.I.P."; > > + compatible = "nextthing,chip", "allwinner,sun5i-r8"; > > + > > + aliases { > > + i2c0 = &i2c0; > > + i2c1 = &i2c1; > > + i2c2 = &i2c2; > > + serial0 = &uart1; > > + serial1 = &uart3; > > + }; > > + > > + chosen { > > + stdout-path = "serial0:115200n8"; > > + }; > > + > > + dram_vcc: dram_vcc { > > + compatible = "regulator-fixed"; > > + regulator-name = "dram-vcc"; > > + regulator-min-microvolt = <1600000>; > > + regulator-max-microvolt = <1600000>; > > + vin-supply = <&ipsout>; > > + regulator-always-on; > > + }; > > Do we need this if it's not controllable?
Probably not, except if we want a comprehensive regulator tree.
> > +
> > + ipsout: ipsout {
> > + compatible = "regulator-fixed";
> > + regulator-name = "ipsout";
> > + regulator-min-microvolt = <5000000>;
> > + regulator-max-microvolt = <5000000>;
> > + regulator-always-on;
> > + };
>
> This isn't needed. What we might want is a proper representation
> of the AXP209's power supply.
Probably.
> > +
> > + usb0_vbus: usb0_vbus {
> > + compatible = "regulator-fixed";
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&chip_vbus_pin>;
> > +
> > + regulator-name = "vbus-usb0";
> > + regulator-min-microvolt = <5000000>;
> > + regulator-max-microvolt = <5000000>;
> > + vin-supply = <&vcc_5v0>;
> > + gpio = <&pio 1 10 GPIO_ACTIVE_HIGH>; /* PB10 */
> > + enable-active-high;
> > + };
> > +
> > + vcc_3v3: vcc3v3 {
> > + compatible = "regulator-fixed";
> > + regulator-name = "vcc-3v3";
> > + regulator-min-microvolt = <3300000>;
> > + regulator-max-microvolt = <3300000>;
> > + vin-supply = <&ipsout>;
> > + regulator-always-on;
> > + };
> > +
> > + vcc_5v0: vcc5v0 {
> > + compatible = "regulator-fixed";
> > + regulator-name = "vcc-5v0";
> > + regulator-min-microvolt = <5000000>;
> > + regulator-max-microvolt = <5000000>;
> > + vin-supply = <&ipsout>;
> > + regulator-always-on;
> > + };
>
> We have these in sunxi-common-regulators.dtsi.
True, I'll change that.
>
> > +};
> > +
> > +&ehci0 {
> > + status = "okay";
> > +};
> > +
> > +&i2c0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&i2c0_pins_a>;
> > + status = "okay";
> > +
> > + axp209: pmic@34 {
> > + reg = <0x34>;
> > +
> > + /*
> > + * The interrupt is routed through the "External Fast
> > + * Interrupt Request" pin (ball G13 of the module)
> > + * directly to the main interrupt controller, without
> > + * any other controller interfering.
> > + */
> > + interrupts = <0>;
> > + };
> > +};
> > +
> > +#include "axp209.dtsi"
> > +
> > +/*
> > + * i2c1 is routed to the external pins and doesn't have any device
> > + * attached to it on the C.H.I.P itself.
> > + */
> > +&i2c1 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&i2c1_pins_a>;
> > + status = "okay";
> > +};
> > +
> > +&i2c2 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&i2c2_pins_a>;
> > + status = "okay";
> > +
> > + xio: gpio@38 {
> > + compatible = "nxp,pcf8574a";
> > + reg = <0x38>;
> > +
> > + gpio-controller;
> > + #gpio-cells = <2>;
> > +
> > + interrupt-parent = <&pio>;
> > + interrupts = <6 0 IRQ_TYPE_EDGE_FALLING>;
> > + interrupt-controller;
> > + #interrupt-cells = <2>;
> > + };
> > +};
> > +
> > +&mmc0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&mmc0_pins_a>;
> > + vmmc-supply = <&vcc_3v3>;
> > + bus-width = <4>;
> > + non-removable;
> > + status = "okay";
> > +};
> > +
> > +&ohci0 {
> > + status = "okay";
> > +};
> > +
> > +&otg_sram {
> > + status = "okay";
> > +};
> > +
> > +&pio {
> > + chip_vbus_pin: chip_vbus_pin@0 {
> > + allwinner,pins = "PB10";
> > + allwinner,function = "gpio_out";
> > + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> > + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> > + };
> > +
> > + chip_id_det_pin: chip_id_det_pin@0 {
> > + allwinner,pins = "PG2";
> > + allwinner,function = "gpio_in";
> > + allwinner,drive = <SUN4I_PINCTRL_10_MA>;
> > + allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
> > + };
> > +};
> > +
> > +®_dcdc2 {
> > + regulator-min-microvolt = <1000000>;
> > + regulator-max-microvolt = <1400000>;
> > + regulator-name = "cpuvdd";
> > + regulator-always-on;
> > +};
> > +
> > +®_dcdc3 {
> > + regulator-min-microvolt = <1000000>;
> > + regulator-max-microvolt = <1300000>;
> > + regulator-name = "corevdd";
> > + regulator-always-on;
> > +};
> > +
> > +®_ldo1 {
> > + regulator-name = "rtcvdd";
> > +};
> > +
> > +®_ldo2 {
> > + regulator-min-microvolt = <2700000>;
> > + regulator-max-microvolt = <3300000>;
>
> Maybe just fix this to 3.0V?
Those are constraints that the board can accept. We have that
information, why lie about it?
>
> > + regulator-name = "avcc";
> > + regulator-always-on;
> > +};
> > +
> > +®_ldo5 {
> > + regulator-min-microvolt = <1800000>;
> > + regulator-max-microvolt = <1800000>;
> > + regulator-name = "vcc-1v8";
>
> A comment here saying this is found on the header, and to be used
> by overlays would be nice.
There's open schematics for that kind of information.
> > +};
> > +
> > +&uart1 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&uart1_pins_b>;
> > + status = "okay";
> > +};
> > +
> > +&uart3 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&uart3_pins_a>,
> > + <&uart3_pins_cts_rts_a>;
> > + status = "okay";
> > +};
> > +
> > +&usb_otg {
> > + dr_mode = "otg";
> > + status = "okay";
> > +};
> > +
> > +&usbphy {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&chip_id_det_pin>;
> > + status = "okay";
> > +
> > + usb0_id_det-gpio = <&pio 6 2 GPIO_ACTIVE_HIGH>; /* PG2 */
>
> Better leave a comment here saying VBUS detection requires AXP209
> usb-power-supply support.
Does it? It can be powered by a battery, with or without VBUS, and
that wouldn't be tied to the fact that the power-supply is USB or
something else.
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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