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      1 /* $NetBSD: sun8i-h2-plus-bananapi-p2-zero.dts,v 1.1 2019/06/05 03:38:09 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2019 Jason R. Thorpe
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 /*
     30  * Device tree for Banana Pi BPI-P2 Zero.  The P2 Zero is essentially an
     31  * M2 Zero with the following additions:
     32  *
     33  * - On-board Ethernet (with PoE capability available as an
     34  *   optional module).
     35  * - On-board eMMC module.
     36  */
     37 
     38 #include "../../../external/gpl2/dts/dist/arch/arm/boot/dts/sun8i-h2-plus-bananapi-m2-zero.dts"
     39 
     40 / {
     41 	model = "Banana Pi BPI-P2-Zero";
     42 	compatible = "sinovoip,bpi-p2-zero", "allwinner,sun8i-h2-plus";
     43 
     44 	aliases {
     45 		/* ethernet0 is the H3 emac, defined in sun8i-h3.dtsi */
     46 		ethernet0 = &emac;
     47 	};
     48 
     49 	leds {
     50 		pwr_led {
     51 			label = "bananapi-p2-zero:red:pwr";
     52 		};
     53 	};
     54 };
     55 
     56 &emac {
     57 	phy-handle = <&int_mii_phy>;
     58 	phy-mode = "mii";
     59 	allwinner,leds-active-low;
     60 	status = "okay";
     61 };
     62 
     63 &mmc0 {
     64 	/*
     65 	 * There seems to be a discrepancy between how the card-detect
     66 	 * signal is wired up between the P2 Zero and the M2 Zero, on
     67 	 * which the P2 Zero is based.
     68 	 *
     69 	 * The M2 Zero device tree file claims that early samples of
     70 	 * the M2 Zero were wired active-low, but that the production
     71 	 * of the board is wired active-high; as such, the M2 Zero
     72 	 * device tree uses an active-high signal for card-detect.
     73 	 *
     74 	 * However, the P2 Zero has been observed in the wild to have
     75 	 * an active-low card-detect signal.  I don't know if this is
     76 	 * an early-vs-late situation like the M2 Zero, but for now we
     77 	 * will configure the card-detect signal to active-low to match
     78 	 * known samples of the board that exist in the wild.
     79 	 */
     80 	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;	/* PF6 */
     81 };
     82 
     83 &mmc2 {
     84 	pinctrl-names = "default";
     85 	pinctrl-0 = <&mmc2_8bit_pins>;
     86 	bus-width = <8>;
     87 	non-removable;
     88 	status = "okay";
     89 };
     90