A similar configuration has been in use on Armbian images since kernel 4.14, but not in a clean enough format for submission. I will test this, but the only differences I see compared to ours are combination of the mystery "chip_h" power domain/reset with the Wifi one and the inclusion of sd_uhs_ddr50. -Tony On Sun, Feb 17, 2019 at 7:16 AM David Summers <beagleboard@xxxxxxxxxxxxxxxxxxx> wrote: > > This patch adds the wifi to the ASUS Tinker Board (S) machines. > > Unfortunatly neither the Tinker Board nor the Tinker Board S schematic > indicate how the WiFi is wired up on these devices. The WiFi is > provided by the RTL8723BS device, that has sdio WiFi and UART > Bluetooth. This patch just adds the WiFi interface. > > With no schematic, most of the wiring has been derived from the ASUS > patch to Debian: > > https://github.com/TinkerBoard/debian_kernel/commit/6a3128ade33f758887048578ada61a4b7ab8e678 > > In conjunction with the pin out of the RTL8723BS device: > > http://files.pine64.org/doc/datasheet/pine64/RTL8723BS.pdf > http://cit.odessa.ua/media/pdf/Intel-Compute-Stick/FN-Link_F23BDSM25-W1.pdf > > The only unusual part is that to bring the card up, both the pins > RK_PD3 and RK_PD4 need to be pulled. Why this needs to be done is not > clear, best explaination is that they are connected to the RTL8723BS > pins WL_DIS# and BT_DIS#, which the data sheet vaguely says: > > Shared with GPIO9 This Pin Can Externally Shutdown the RTL8723BS WLAN > function when BT_DISn is Pulled Low. When this pin deasserted, SDIO > interface will be disabled. This pin can also support the WLAN Ra > dio-off function with host interface remaining connected. > > Anyway extensive testing the TheSaint on ArchLinux Arm Forum > > https://archlinuxarm.org/forum/viewtopic.php?f=44&t=13064&start=120#p60548 > > Signed-off-by: David Summers <beagleboard@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx> > --- > arch/arm/boot/dts/rk3288-tinker.dtsi | 39 +++++++++++++++++++++++++--- > 1 file changed, 36 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/boot/dts/rk3288-tinker.dtsi b/arch/arm/boot/dts/rk3288-tinker.dtsi > index fceaeed44e34..e1796f340eef 100644 > --- a/arch/arm/boot/dts/rk3288-tinker.dtsi > +++ b/arch/arm/boot/dts/rk3288-tinker.dtsi > @@ -3,8 +3,9 @@ > * Copyright (c) 2017 Fuzhou Rockchip Electronics Co., Ltd. > */ > > #include "rk3288.dtsi" > #include <dt-bindings/input/input.h> > +#include <dt-bindings/clock/rockchip,rk808.h> > > / { > chosen { > @@ -98,6 +97,15 @@ > startup-delay-us = <100000>; > vin-supply = <&vcc_io>; > }; > + > + sdio_pwrseq: sdio-pwrseq { > + compatible = "mmc-pwrseq-simple"; > + clocks = <&rk808 RK808_CLKOUT1>; > + clock-names = "ext_clock"; > + pinctrl-names = "default"; > + pinctrl-0 = <&wifi_enable>; > + reset-gpios = <&gpio4 RK_PD3 GPIO_ACTIVE_LOW>, <&gpio4 RK_PD4 GPIO_ACTIVE_LOW>; > + }; > }; > > &cpu0 { > @@ -337,8 +345,8 @@ > > &io_domains { > status = "okay"; > - > sdcard-supply = <&vccio_sd>; > + wifi-supply = <&vcc_18>; > }; > > &pinctrl { > @@ -417,6 +425,12 @@ > rockchip,pins = <7 8 RK_FUNC_GPIO &pcfg_pull_none>; > }; > }; > + > + sdio { > + wifi_enable: wifi-enable { > + rockchip,pins = <4 RK_PD3 RK_FUNC_GPIO &pcfg_pull_none>, <4 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>; > + }; > + }; > }; > > &pwm0 { > @@ -440,6 +454,25 @@ > vqmmc-supply = <&vccio_sd>; > }; > > +&sdio0 { > + bus-width = <4>; > + cap-sd-highspeed; > + cap-sdio-irq; > + keep-power-in-suspend; > + mmc-pwrseq = <&sdio_pwrseq>; > + non-removable; > + pinctrl-names = "default"; > + pinctrl-0 = <&sdio0_bus4>, <&sdio0_cmd>, <&sdio0_clk>, <&sdio0_int>; > + max-frequency = <50000000>; > + sd-uhs-sdr12; > + sd-uhs-sdr25; > + sd-uhs-sdr50; > + sd-uhs-ddr50; > + vmmc-supply = <&vcc_io>; > + vqmmc-supply = <&vcc_18>; > + status = "okay"; > +}; > + > &tsadc { > rockchip,hw-tshut-mode = <1>; /* tshut mode 0:CRU 1:GPIO */ > rockchip,hw-tshut-polarity = <1>; /* tshut polarity 0:LOW 1:HIGH */ > -- > beagleboard@xxxxxxxxxxxxxxxxxxx > > > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-rockchip
