Linux/WL1837MOD: Device tree entry for WL1837 on Linux 4.9

PNZ

Part Number: WL1837MOD
Other Parts Discussed in Thread: WL1837

Tool/software: Linux

Hello,

When I use fixed regulator for WL_EN in device tree, for Linux 4.9 on Zynq Ultrascale, I get interrupt timeout error and driver cannot toggle WL_EN. However SDIO powerseq works fine. The only concern I have is when I want to disable wlan0 from linux, I see narrow high pulses on WL_EN, but everything works as expected. (no errors, I can get IP and transfer files ...)

Is this configuration correct or expected on Linux 4.9 (to use powerseq to toggle WL_EN) or is this related to SDIO drivers/IP in our MP SOC not linux?

Thanks

over 7 years ago

0 Eyal Reizer over 7 years ago

TI__Mastermind 20285 points

Hi,

Can you share the device tree file for the board you are using?
I mainly want to see how the wlcore section is set with respect to the interrupt pin.

BR,
Eyal

0 PNZ over 7 years ago in reply to Eyal Reizer

Prodigy 20 points

Hi Eyal, thanks for quick reply.

&sdhci1 {
status = "okay";
bus-width = <0x4>;
ti,non-removable;
disable-wp;
cap-power-off-card;
broken-cd;
keep-power-in-suspend;
mmc-pwrseq = <&sdio_pwrseq>;
vqmmc-supply = <&wlan_en_reg>;
#address-cells = <1>;
#size-cells = <0>;
// wilink module configuration
wlcore: wlcore@0 {
compatible = "ti,wl1837";
reg = <2>;
interrupt-parent = <&gpio>;
interrupts = <44 1>;
ref-clock-frequency = <38400000>;
};
};

0 Eyal Reizer over 7 years ago in reply to PNZ

TI__Mastermind 20285 points

Hi,

What is the error you are getting when trying the following sequence?:

cat /proc/interrupts | grep wl18xx
ifconfig wlan0 up
iw wlan0 scan
ifconfig wlan0 down
ifconfig wlan0 up

Please paste the relevant console log showing this.
Can you please also attach the full .dts file that includes also the fixed regulator settings (wlan_en_reg)?

Best Regards,
Eyal

Wi-Fi

Wi-Fi forum

Linux/WL1837MOD: Device tree entry for WL1837 on Linux 4.9