Hi
I have interfaced TRF7970a with the SPI of I.MX6 sabresd Board on linux platform.
I am using yocto kernel 3.10.17. Also built neard package by bitbaking
After powering the Board(Sabresd) and after the function trf7970a_probe is called, and interrupt is registered for the
device. Inside the probe() the trf7970a_power_up function is called which set EN and EN2 high.
The issue i am facing is that there is continuous interrupt from the trf7970a when the trf7970a is powered up. But after that the interrupts gets diabled.
**inside handler functiontrf7970a_irq***********inside handler function
CPU: 1 PID: 110 Comm: irq/267-trf7970 Not tainted 3.10.17-1.0.1_ga+gdac46dc #26
[<80013ae0>] (unwind_backtrace+0x0/0xf4) from [<80011504>] (show_stack+0x10/0x14)
[<80011504>] (show_stack+0x10/0x14) from [<80074f28>] (__report_bad_irq+0x28/0xc0)
[<80074f28>] (__report_bad_irq+0x28/0xc0) from [<800753a0>] (note_interrupt+0x17c/0x234)
[<800753a0>] (note_interrupt+0x17c/0x234) from [<80073f18>] (irq_thread+0x150/0x160)
[<80073f18>] (irq_thread+0x150/0x160) from [<8004345c>] (kthread+0xb4/0xb8)
[<8004345c>] (kthread+0xb4/0xb8) from [<8000e118>] (ret_from_fork+0x14/0x3c)
handlers:
[<80073378>] irq_default_primary_handler threaded [<803250d0>] trf7970a_irq
Disabling IRQ #267
Can you suggest me the reason of this?
My device tree file configurations are:
&ecspi1 {
fsl,spi-num-chipselects = <1>;
cs-gpios = <&gpio4 9 0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_ecspi1_2>;
status = "okay";
nfc@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "ti,nfc7970a";
interrupt-parent = <&gpio4>;
interrupts = <11 0>;
ti,enable-gpios = < &gpio4 14 0>,
< &gpio4 15 0>;
spi-max-frequency = <20000000>;
irq-status-read-quirk;
en2-rf-quirk;
reg = <0>;
};
};
From user space i am using nfctool and the tag i am using is Tag-it HF-I
