i.MX ProcessorsのトピックRe: RTC1 cannot find in the /dev

RTC1 cannot find in the /dev

hankwang — Mon, 11 Nov 2019 09:25:20 GMT

Hi, we added rtc1 function in the device tree of kernel. Our BSP is 4.14.78 and platform is i.mx6ul.

But we can not find rtc1 in the /dev folder. What is problem ?

#include "imx6ul.dtsi"

/ {

aliases {

rtc0 = &rtc_i2c;

rtc1 = "soc/aips-bus@02000000/snvs@020cc000/snvs-rtc-lp@34";

};

Thanks.

Re: RTC1 cannot find in the /dev

igorpadykov — Tue, 12 Nov 2019 06:42:26 GMT

Hi hank

for snvs rtc example one can look at

linux/arch/arm/boot/dts/imx6ul.dtsi

imx6ul.dtsi\dts\boot\arm\arch - linux-imx - i.MX Linux kernel

may be useful to check examples with two rtc:

Real-Time Clock (RTC)

How to use the Real Time Clock in Linux

Best regards
igor
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Re: RTC1 cannot find in the /dev

hankwang — Thu, 14 Nov 2019 08:21:37 GMT

Hi , We resolved the issue. The device tree modify code.

/ {

rtc0 = &rtc_i2c;

rtc1 = &snvs;

}