ARM: dts: imx6qdl-sr-som: add support for TI Wi-Fi

Add support for the TI Wi-Fi WL1837 device on SolidRun's revision
1.5 microsoms.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6qdl-sr-som-ti.dtsi b/arch/arm/boot/dts/imx6qdl-sr-som-ti.dtsi
new file mode 100644 (file)
index 0000000..44a97ba
--- /dev/null
+++ b/arch/arm/boot/dts/imx6qdl-sr-som-ti.dtsi
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2013,2014 Russell King
+ *
+ * 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
+ *     version 2 as published by the Free Software Foundation.
+ *
+ *     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.
+ */
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+       nvcc_sd1: regulator-nvcc-sd1 {
+               compatible = "regulator-fixed";
+               regulator-always-on;
+               regulator-name = "nvcc_sd1";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+               vin-supply = <&vcc_3v3>;
+       };
+
+       clk_ti_wifi: ti-wifi-clock {
+               /* This is a hack around the kernel - using "fixed clock"
+                * results in the "pinctrl" properties being ignored, and
+                * the clock not being output.  Instead, use a gated clock
+                * and the unrouted WL_XTAL_PU gpio.
+                */
+               compatible = "gpio-gate-clock";
+               #clock-cells = <0>;
+               clock-frequency = <32768>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_microsom_ti_clk>;
+               enable-gpios = <&gpio5 5 GPIO_ACTIVE_HIGH>;
+       };
+
+       pwrseq_ti_wifi: ti-wifi-pwrseq {
+               compatible = "mmc-pwrseq-simple";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_microsom_ti_wifi_en>;
+               reset-gpios = <&gpio5 26 GPIO_ACTIVE_LOW>;
+               post-power-on-delay-ms = <200>;
+               clocks = <&clk_ti_wifi>;
+               clock-names = "ext_clock";
+       };
+};
+
+&iomuxc {
+       microsom {
+               pinctrl_microsom_ti_bt: microsom-ti-bt {
+                       fsl,pins = <
+                               /* BT_EN_SOC */
+                               MX6QDL_PAD_CSI0_DAT14__GPIO6_IO00       0x40013070
+                       >;
+               };
+
+               pinctrl_microsom_ti_clk: microsom-ti-clk {
+                       fsl,pins = <
+                               /* EXT_32K */
+                               MX6QDL_PAD_GPIO_8__XTALOSC_REF_CLK_32K  0x1b0b0
+                               /* WL_XTAL_PU (unrouted) */
+                               MX6QDL_PAD_DISP0_DAT11__GPIO5_IO05 0x40013070
+                       >;
+               };
+
+               pinctrl_microsom_ti_wifi_en: microsom-ti-wifi-en {
+                       fsl,pins = <
+                               /* WLAN_EN_SOC */
+                               MX6QDL_PAD_CSI0_DAT8__GPIO5_IO26        0x40013070
+                       >;
+               };
+
+               pinctrl_microsom_ti_wifi_irq: microsom-ti-wifi-irq {
+                       fsl,pins = <
+                               /* WLAN_IRQ */
+                               MX6QDL_PAD_CSI0_DAT18__GPIO6_IO04       0x40013070
+                       >;
+               };
+
+               pinctrl_microsom_uart4: microsom-uart4 {
+                       fsl,pins = <
+                               MX6QDL_PAD_CSI0_DAT12__UART4_TX_DATA 0x1b0b1
+                               MX6QDL_PAD_CSI0_DAT13__UART4_RX_DATA 0x1b0b1
+                               MX6QDL_PAD_CSI0_DAT16__UART4_RTS_B 0x1b0b1
+                               MX6QDL_PAD_CSI0_DAT17__UART4_CTS_B 0x1b0b1
+                       >;
+               };
+
+               pinctrl_microsom_usdhc1: microsom-usdhc1 {
+                       fsl,pins = <
+                               MX6QDL_PAD_SD1_CMD__SD1_CMD    0x17059
+                               MX6QDL_PAD_SD1_CLK__SD1_CLK    0x10059
+                               MX6QDL_PAD_SD1_DAT0__SD1_DATA0 0x17059
+                               MX6QDL_PAD_SD1_DAT1__SD1_DATA1 0x17059
+                               MX6QDL_PAD_SD1_DAT2__SD1_DATA2 0x17059
+                               MX6QDL_PAD_SD1_DAT3__SD1_DATA3 0x17059
+                       >;
+               };
+       };
+};
+
+/* UART4 - Connected to optional TI Wi-Fi/BT/FM */
+&uart4 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_microsom_uart4>;
+       uart-has-rtscts;
+       status = "okay";
+
+       bluetooth {
+               compatible = "ti,wl1837-st";
+               clocks = <&clk_ti_wifi>;
+               clock-names = "ext_clock";
+               enable-gpios = <&gpio6 0 GPIO_ACTIVE_HIGH>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_microsom_ti_bt>;
+       };
+};
+
+/* USDHC1 - Connected to optional TI Wi-Fi/BT/FM */
+&usdhc1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_microsom_usdhc1>;
+       bus-width = <4>;
+       keep-power-in-suspend;
+       mmc-pwrseq = <&pwrseq_ti_wifi>;
+       non-removable;
+       vmmc-supply = <&vcc_3v3>;
+       /* vqmmc-supply = <&nvcc_sd1>; - MMC layer doesn't like it! */
+       status = "okay";
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       wlcore@2 {
+               compatible = "ti,wl1837";
+               reg = <2>;
+               interrupts-extended = <&gpio6 4 IRQ_TYPE_LEVEL_HIGH>;
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_microsom_ti_wifi_irq>;
+       };
+};