Hi,
we just finished a new custom design with AM3352 and the tps65910 PMIC controller (mostly based on beaglebone black HW), using the Yocto YP Core - Dizzy (1.7.1) Build System.
We were able to iron out most of the issues, there is one issue that remains unresolved; there is an interrupt problem with the tps65910 and the tps65910 RTC kernel driver.
Please find below a brief description of our custom board and some log snippets from the kernel boot process that will show the problem:
CPU: AM3352, DDR3, two ethernet ports used, mmc, emmc, i2c...
Software Stack: Linux version 3.14.19-yocto-standard, Yocto dizzy 1.7.1, modified beaglebone branch
PMIC tps65910, connected to AM3352 more or less as per the
"TPS65910Ax User's Guide For AM335x Processors"
Most important: the INT1 Pin of the 65910 is connected to the EXTINTn Port of the Am3352 (like on beaglebone black).
During bootup of the kernel there is a long delay (~20 sec.) after the console log entry:
"random: nonblocking pool is initialized"
and before the log entry:
"irq 23: nobody cared (try booting with the "irqpoll" option)"
(full kernel log and device tree see below)
Measuring on the INT1 Pin of the PMIC reveals that it is permanently low, so an IRQ is pending. The kernel tries to service, doesn't find a driver...
After the delay the kernel disables the interrupt, and the system continues booting. The interrupt remains disabled.
The RTC driver then loads and the RTC seems to be working (probably without alarm capability)
Any help, on how we can fix that situation is highly appreciated.
best regards
Chris
-- acurana GmbH, Bahnhofstr. 28, 83043 Bad Aibling, Germany Tel.: +49 8061 / 93 98 386 Fax: +49 8061 / 93 98 385 http://www.acurana.de/
Below you will find the relevant device tree entries and some snippets of the kernel log. The full kernel log can be found here:
---www.acurana.de/typo3temp/kernel-log-cu4xx-rtc-issue.txt---(please copy to browser url line)
Device Tree:
&i2c0 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins>;
status = "okay";
clock-frequency = <400000>;
tps: tps@2d {
reg = <0x2d>;
};
};
&tps {
pinctrl-names = "default";
pinctrl-0 = <&tps_pins>;
interrupts = <7>;
interrupt-parent = <&intc>;
ti,en-ck32k-xtal;
vcc1-supply = <&vmmcsd_fixed>;
vcc2-supply = <&vmmcsd_fixed>;
vcc3-supply = <&vmmcsd_fixed>;
...
#include "tps65910.dtsi"
...
Kernel log snippet
...
random: nonblocking pool is initialized
< approx. 20 sec. delay >
irq 23: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 48 Comm: irq/23-tps65910 Tainted: G W 3.14.19-yocto-standard #2
[<c0015674>] (unwind_backtrace) from [<c00124a0>] (show_stack+0x20/0x24)
[<c00124a0>] (show_stack) from [<c06e4348>] (dump_stack+0x20/0x28)
[<c06e4348>] (dump_stack) from [<c007a32c>] (__report_bad_irq.isra.7+0x34/0xf0)
[<c007a32c>] (__report_bad_irq.isra.7) from [<c007a648>] (note_interrupt+0x1dc/0x284)
[<c007a648>] (note_interrupt) from [<c0078708>] (handle_irq_event_percpu+0x270/0x2c4)
[<c0078708>] (handle_irq_event_percpu) from [<c00787cc>] (handle_irq_event+0x70/0x90)
[<c00787cc>] (handle_irq_event) from [<c007b294>] (handle_level_irq+0xe8/0x128)
[<c007b294>] (handle_level_irq) from [<c0077ce0>] (generic_handle_irq+0x30/0x40)
[<c0077ce0>] (generic_handle_irq) from [<c000f30c>] (handle_IRQ+0x70/0x90)
[<c000f30c>] (handle_IRQ) from [<c00086cc>] (omap3_intc_handle_irq+0x74/0x9c)
[<c00086cc>] (omap3_intc_handle_irq) from [<c06e9cc0>] (__irq_svc+0x40/0x70)
Exception stack(0xde43feb0 to 0xde43fef8)
fea0: 00000088 00015050 de00b00c 00000000
fec0: de004b80 de43e000 de428400 de43e000 c0078fec 00000001 00000000 de43ff14
fee0: de43fee0 de43fef8 c007b160 c0078fac a0000113 ffffffff
[<c06e9cc0>] (__irq_svc) from [<c0078fac>] (irq_finalize_oneshot+0xec/0x12c)
[<c0078fac>] (irq_finalize_oneshot) from [<c0079028>] (irq_thread_fn+0x3c/0x44)
[<c0079028>] (irq_thread_fn) from [<c007925c>] (irq_thread+0xc4/0x13c)
[<c007925c>] (irq_thread) from [<c005985c>] (kthread+0xd0/0xe4)
[<c005985c>] (kthread) from [<c000e398>] (ret_from_fork+0x14/0x20)
handlers:
[<c00787ec>] irq_default_primary_handler threaded [<c0458774>] regmap_irq_thread
Disabling IRQ #23
vrtc: 1800 mV
vrtc: supplied by vmmcsd_fixed
vio: 1500 mV
vio: supplied by vmmcsd_fixed
vdd_core: 1075 <--> 1125 mV at 1100 mV
vdd_core: supplied by vmmcsd_fixed
vdd_shv: 1075 <--> 1125 mV at 1100 mV
vdd_shv: supplied by vmmcsd_fixed
vdd3: 5000 mV
vdig1: 1800 mV
vdig1: supplied by vmmcsd_fixed
vdig2: 1800 mV
vdig2: supplied by vmmcsd_fixed
vpll: 1800 mV
vpll: supplied by vmmcsd_fixed
vdac: 1800 mV
vdac: supplied by vmmcsd_fixed
vaux1: 1800 mV
vaux1: supplied by vmmcsd_fixed
vaux2: 3300 mV
vaux2: supplied by vmmcsd_fixed
vaux33: 3300 mV
vaux33: supplied by vmmcsd_fixed
vmmc: 3300 mV
vmmc: supplied by vmmcsd_fixed
tps65910-rtc tps65910-rtc: rtc core: registered tps65910-rtc as rtc0
