ARM: dts: Add am335x-bonegreen-wireless

SeeedStudio BeagleBone Green Wireless (BBGW) is an expansion of the
SeeedStudio Green (BBG) with the Ethernet replaced by a TI wl1835
wireless module.

This board can be indentified by the GW1x value after A335BNLT (BBB)
in the at24 eeprom:
GW1x [aa 55 33 ee 41 33 33 35  42 4e 4c 54 47 57 31 41  |.U3.A335BNLTGW1A|]

http://beagleboard.org/green-wireless
http://wiki.seeed.cc/BeagleBone_Green_Wireless/

firmware: https://github.com/beagleboard/beaglebone-black-wireless/tree/master/firmware
wl18xx mac address: Stored in at24 eeprom at address 5-16:
hexdump -e '8/1 "%c"' /sys/bus/i2c/devices/0-0050/eeprom | cut -b 5-16

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
CC: Tony Lindgren <tony@atomide.com>
CC: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 9415a49bd11b6263f299c5a131ed057f675c0484..6c0a3e3fdf30c1ce448324b4d1563339f14eaec3 100644 (file)
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -565,6 +565,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \
        am335x-boneblack.dtb \
        am335x-boneblack-wireless.dtb \
        am335x-bonegreen.dtb \
+       am335x-bonegreen-wireless.dtb \
        am335x-chiliboard.dtb \
        am335x-cm-t335.dtb \
        am335x-evm.dtb \

diff --git a/arch/arm/boot/dts/am335x-bonegreen-wireless.dts b/arch/arm/boot/dts/am335x-bonegreen-wireless.dts
new file mode 100644 (file)
index 0000000..9d1a0fd
--- /dev/null
+++ b/arch/arm/boot/dts/am335x-bonegreen-wireless.dts
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+#include "am33xx.dtsi"
+#include "am335x-bone-common.dtsi"
+#include "am335x-bonegreen-common.dtsi"
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+       model = "TI AM335x BeagleBone Green Wireless";
+       compatible = "ti,am335x-bone-green-wireless", "ti,am335x-bone-green", "ti,am335x-bone-black", "ti,am335x-bone", "ti,am33xx";
+
+       wlan_en_reg: fixedregulator@2 {
+               compatible = "regulator-fixed";
+               regulator-name = "wlan-en-regulator";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+               startup-delay-us= <70000>;
+
+               /* WL_EN */
+               gpio = <&gpio0 26 0>;
+               enable-active-high;
+       };
+};
+
+&am33xx_pinmux {
+       bt_pins: pinmux_bt_pins {
+               pinctrl-single,pins = <
+                       AM33XX_IOPAD(0x878, PIN_OUTPUT_PULLUP | MUX_MODE7)      /* gpmc_ad12.gpio1_28 BT_EN */
+               >;
+       };
+
+       mmc3_pins: pinmux_mmc3_pins {
+               pinctrl-single,pins = <
+                       AM33XX_IOPAD(0x830, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_ad12.mmc2_dat0 */
+                       AM33XX_IOPAD(0x834, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_ad13.mmc2_dat1 */
+                       AM33XX_IOPAD(0x838, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_ad14.mmc2_dat2 */
+                       AM33XX_IOPAD(0x83c, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_ad15.mmc2_dat3 */
+                       AM33XX_IOPAD(0x888, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_csn3.mmc2_cmd */
+                       AM33XX_IOPAD(0x88c, PIN_INPUT_PULLUP | MUX_MODE3)       /* gpmc_clk.mmc2_clk */
+               >;
+       };
+
+       uart3_pins: pinmux_uart3_pins {
+               pinctrl-single,pins = <
+                       AM33XX_IOPAD(0x934, PIN_INPUT_PULLUP | MUX_MODE1)       /* gmii1_rxd3.uart3_rxd */
+                       AM33XX_IOPAD(0x938, PIN_OUTPUT_PULLDOWN | MUX_MODE1)    /* gmii1_rxd2.uart3_txd */
+                       AM33XX_IOPAD(0x948, PIN_INPUT | MUX_MODE3)              /* mdio_data.uart3_ctsn */
+                       AM33XX_IOPAD(0x94c, PIN_OUTPUT_PULLDOWN | MUX_MODE3)    /* mdio_clk.uart3_rtsn */
+               >;
+       };
+
+       wl18xx_pins: pinmux_wl18xx_pins {
+               pinctrl-single,pins = <
+                       AM33XX_IOPAD(0x828, PIN_OUTPUT_PULLDOWN | MUX_MODE7)    /* gpmc_ad10.gpio0_26 WL_EN */
+                       AM33XX_IOPAD(0x82C, PIN_INPUT_PULLDOWN | MUX_MODE7)     /* gpmc_ad11.gpio0_27 WL_IRQ */
+                       AM33XX_IOPAD(0x87C, PIN_OUTPUT_PULLUP | MUX_MODE7)      /* gpmc_csn0.gpio1_29 LS_BUF_EN */
+               >;
+       };
+};
+
+&mac {
+       status = "disabled";
+};
+
+&mmc3 {
+       dmas = <&edma_xbar 12 0 1
+               &edma_xbar 13 0 2>;
+       dma-names = "tx", "rx";
+       status = "okay";
+       vmmc-supply = <&wlan_en_reg>;
+       bus-width = <4>;
+       non-removable;
+       cap-power-off-card;
+       ti,needs-special-hs-handling;
+       keep-power-in-suspend;
+       pinctrl-names = "default";
+       pinctrl-0 = <&mmc3_pins &wl18xx_pins>;
+
+       #address-cells = <1>;
+       #size-cells = <0>;
+       wlcore: wlcore@2 {
+               compatible = "ti,wl1835";
+               reg = <2>;
+               interrupt-parent = <&gpio0>;
+               interrupts = <27 IRQ_TYPE_EDGE_RISING>;
+       };
+};
+
+&uart3 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&uart3_pins &bt_pins>;
+       status = "okay";
+};
+
+&gpio1 {
+       ls_buf_en {
+               gpio-hog;
+               gpios = <29 GPIO_ACTIVE_HIGH>;
+               output-high;
+               line-name = "LS_BUF_EN";
+       };
+};
+
+/* BT_AUD_OUT from wl1835 has to be pulled low when WL_EN is activated.*/
+/* in case it isn't, wilink8 ends up in one of the test modes that     */
+/* intruces various issues (elp wkaeup timeouts etc.)                  */
+/* On the BBGW this pin is routed through the level shifter (U21) that */
+/* introduces a pullup on the line and wilink8 ends up in a bad state. */
+/* use a gpio hog to force this pin low. An alternative may be adding  */
+/* an external pulldown on U21 pin 4.                                  */
+
+&gpio3 {
+       bt_aud_in {
+               gpio-hog;
+               gpios = <16 GPIO_ACTIVE_HIGH>;
+               output-low;
+               line-name = "MCASP0_AHCLKR";
+       };
+};