This patch series aims to fix the spurious TINT IRQ as per the precaution
mentioned in section "8.8.3 Precaution when Changing Interrupt Settings"
of the latest RZ/G2L hardware manual. As per this we need to mask
the interrupts while setting the interrupt detection method. Apart from
this we need to clear interrupt status after setting TINT interrupt
detection method to the edge type.
Patch#1 in this series fixes HW race condition due to clearing delay
by the cpu.
patch#2 simplifies the code and reused the same code in patch#3
patch#3 fixes spurious tint irq
patch#4 drops removing/adding tint source during disable()/enable()
patch#5 simplifies enable()/disable()
Before fix: Spurious TINT IRQ's during boot
root@smarc-rzg2l:~# cat /proc/interrupts | grep pinctrl
67: 1 0 11030000.pinctrl 344 Edge rtc-isl1208
68: 0 0 11030000.pinctrl 378 Edge SW3
81: 1 0 11030000.pinctrl 17 Edge 1-003d
root@smarc-rzg2l:~#
After the fix:
root@smarc-rzg2l:~# cat /proc/interrupts | grep pinctrl
67: 0 0 11030000.pinctrl 344 Edge rtc-isl1208
68: 0 0 11030000.pinctrl 378 Edge SW3
81: 0 0 11030000.pinctrl 17 Edge 1-003d
root@smarc-rzg2l:~#
This patch series is tested with [1]
[1] https://lore.kernel.org/all/20240206135115.151218-1-biju.das.jz@xxxxxxxxxxxxxx/
Biju Das (5):
irqchip/renesas-rzg2l: Prevent IRQ HW race
irqchip/renesas-rzg2l: Rename rzg2l_tint_eoi()
irqchip/renesas-rzg2l: Fix spurious TINT IRQ
irqchip/renesas-rzg2l: Use TIEN for enable/disable
irqchip/renesas-rzg2l: Simplify rzg2l_irqc_irq_{en,dis}able()
drivers/irqchip/irq-renesas-rzg2l.c | 88 ++++++++++++++++++++---------
1 file changed, 61 insertions(+), 27 deletions(-)
--
2.25.1
