topic Re: RTC interrupt num problem in Layerscape

RTC interrupt num problem

muaxi8 — Tue, 23 Nov 2021 03:35:40 GMT

lx2080 Custom board.

I have mounted an RTC device under I2C-2, but how do I determine its interrupt number, which I need

to configure in the device tree。

&i2c2 {
status = "okay";
rx8111@32 {
compatible = "epson,rx8111";
reg = <0x32>;
//interrupts = <0 150 0x4>;
};

The interrupt number is incorrectly configured, causing device loading failure,kernel log：

root@TinyLinux:~# dmesg|grep rtc
[ 4.035145] ftm-alarm 2800000.timer: registered as rtc1
[ 4.045506] rtc-rx8111 2-0032: i2c_smbus_write_byte_data over rx8111_init_client
[ 4.056099] rtc-rx8111 2-0032: Init Success
[ 4.060279] rtc-rx8111 2-0032: IRQ supplied fail
[ 4.066136] rtc-rx8111 2-0032: registered as rtc0
[ 5.355119] fsl_dpaa2_ptp dprtc.0: Adding to iommu group 6
[ 6.090951] rtc-rx8111 2-0032: setting system clock to 2020-12-10T20:08:56 UTC (1607630936)
root@TinyLinux:~#

Circuit schematic diagram:

Re: RTC interrupt num problem

yipingwang — Tue, 23 Nov 2021 07:33:37 GMT

Please refer to the following definition in fsl-ls1046a-rdb.dts, it seems that no need to specify the interrupt number.

&i2c3 {
status = "okay";

rtc@51 {
compatible = "nxp,pcf2129";
reg = <0x51>;
};
};

Re: RTC interrupt num problem

muaxi8 — Thu, 25 Nov 2021 05:44:15 GMT

If the interrupt number is not specified, the driver will load an error。

root@localhost:~# dmesg|grep rtc
[ 3.708537] ftm-alarm 2800000.timer: registered as rtc1
[ 3.718904] rtc-rx8111 2-0032: i2c_smbus_write_byte_data over rx8111_init_client
[ 3.729490] rtc-rx8111 2-0032: Init Success
[ 3.733668] rtc-rx8111 2-0032: IRQ supplied fail
[ 3.739523] rtc-rx8111 2-0032: registered as rtc0
[ 5.047704] fsl_dpaa2_ptp dprtc.0: Adding to iommu group 6
[ 5.781579] rtc-rx8111 2-0032: setting system clock to 2020-12-10T20:20:29 UTC (1607631629)

now ， RTC interrupt connected to the IRQ05 pin of the CPU, what's the interrupt

number of this pin, is it 5 ？

Re: RTC interrupt num problem

yipingwang — Wed, 01 Dec 2021 07:43:35 GMT

The following is defined in fsl-lx2160a-rdb.dts in LSDK 21.08.

&i2c4 {
status = "okay";

rtc@51 {
compatible = "nxp,pcf2129";
reg = <0x51>;
/* IRQ_RTC_B -> IRQ08, active low */
interrupts-extended = <&extirq 8 IRQ_TYPE_LEVEL_LOW>;
};
};

Please define your dts as the following.

&i2c2 {
status = "okay";
rx8111@32 {
compatible = "epson,rx8111";
reg = <0x32>;
interrupts-extended = <&extirq 5 IRQ_TYPE_LEVEL_LOW>;
};