From: Vignesh Raghavendra <vigneshr@xxxxxx>
WL1837 WLAN card is present on the original AM625 SK board. It
communicates with the SoC using 4 bit SDIO through the second instance of
MMCSD.
Starting with SK-AM62B, there is a M.2 WLAN device connector instead of
the integrated WL1837 WLAN. The M.2 connector should be handled separately
in the k3-am62a.dtsi and k3-am62b.dtsi files as needed.
Note that WLAN currently needs fw_devlink=permissive set on the command
line. Not sure what is missing here but that seems like a separate change.
Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx>
Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx>
[tony@xxxxxxxxxxx: updated for pinctrl, improved comments]
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
---
arch/arm64/boot/dts/ti/k3-am625-sk.dts | 79 ++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk.dts b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
--- a/arch/arm64/boot/dts/ti/k3-am625-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk.dts
@@ -103,6 +103,32 @@ vcc_1v8: regulator-5 {
regulator-always-on;
regulator-boot-on;
};
+
+ wlan_lten: regulator-6 {
+ bootph-all;
+ compatible = "regulator-fixed";
+ regulator-name = "wlan_lten";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ vin-supply = <&vcc_3v3_sys>;
+ gpios = <&exp1 11 GPIO_ACTIVE_LOW>;
+ };
+
+ wlan_en: regulator-7 {
+ /* OUTPUT of SN74AVC2T244DQMR */
+ bootph-all;
+ compatible = "regulator-fixed";
+ regulator-name = "wlan_en";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ enable-active-high;
+ regulator-always-on;
+ vin-supply = <&wlan_lten>;
+ gpios = <&main_gpio0 71 GPIO_ACTIVE_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&wlan_en_default_pins>;
+ };
};
&main_pmx0 {
@@ -154,6 +180,33 @@ main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-default-pins {
AM62X_IOPAD(0x01d4, PIN_INPUT, 7) /* (B15) UART0_RTSn.GPIO1_23 */
>;
};
+
+ wlan_en_default_pins: wlan-en-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x124, PIN_OUTPUT, 7) /* (A23) MMC2_SDCD.GPIO0_71 */
+ >;
+ };
+
+ main_mmc2_default_pins: main-mmc2-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x120, PIN_INPUT, 0) /* (C24) MMC2_CMD */
+ AM62X_IOPAD(0x118, PIN_INPUT, 0) /* (D25) MMC2_CLK */
+ AM62X_IOPAD(0x114, PIN_INPUT, 0) /* (B24) MMC2_DAT0 */
+ AM62X_IOPAD(0x110, PIN_INPUT, 0) /* (C25) MMC2_DAT1 */
+ AM62X_IOPAD(0x10c, PIN_INPUT, 0) /* (E23) MMC2_DAT2 */
+ AM62X_IOPAD(0x108, PIN_INPUT, 0) /* (D24) MMC2_DAT3 */
+ AM62X_IOPAD(0x11c, PIN_INPUT, 0) /* (#N/A) MMC2_CLKB */
+ >;
+ };
+
+ main_wlirq_default_pins: main-wlirq-default-pins {
+ bootph-all;
+ pinctrl-single,pins = <
+ AM62X_IOPAD(0x128, PIN_INPUT, 7) /* (B23) MMC2_SDWP.GPIO0_72 */
+ >;
+ };
};
&main_gpio0 {
@@ -200,6 +253,32 @@ &sdhci1 {
vqmmc-supply = <&vdd_sd_dv>;
};
+&sdhci2 {
+ status = "okay";
+ vmmc-supply = <&wlan_en>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_mmc2_default_pins>;
+ bus-width = <4>;
+ non-removable;
+ ti,fails-without-test-cd;
+ cap-power-off-card;
+ keep-power-in-suspend;
+ ti,driver-strength-ohm = <50>;
+ assigned-clocks = <&k3_clks 157 158>;
+ assigned-clock-parents = <&k3_clks 157 160>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ wlcore: wlcore@2 {
+ compatible = "ti,wl1837";
+ reg = <2>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_wlirq_default_pins>;
+ interrupt-parent = <&main_gpio0>;
+ interrupts = <72 IRQ_TYPE_EDGE_FALLING>;
+ };
+};
+
&cpsw3g {
pinctrl-names = "default";
pinctrl-0 = <&main_rgmii1_pins_default>, <&main_rgmii2_pins_default>;
--
2.42.1
