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gpio_drv: mask IRQ until it is acknowledged

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When working with GPIO interrupts on i.MX6SX for Ethernet PHYs
it became obvious that the GPIO driver repeatedly receives interrupts
for the same event, because it acknowledges the interrupt before a
client has handled the event.

Ref #2750
This commit is contained in:
Stefan Kalkowski 2018-02-27 09:57:34 +01:00 committed by Christian Helmuth
parent f653be1ebc
commit 7949c194e9
1 changed files with 4 additions and 1 deletions
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5
repos/os/src/drivers/gpio/spec/imx/driver.h
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@ -49,8 +49,10 @@ class Imx_driver : public Gpio::Driver
for(unsigned i = 0; i < MAX_PINS; i++) {
if ((status & (1 << i)) && _irq_enabled[i] &&
_sig_cap[i].valid())
_sig_cap[i].valid()) {
Genode::Signal_transmitter(_sig_cap[i]).submit();
_reg.write<Gpio_reg::Int_mask>(0, i);
}
}
}
@ -113,6 +115,7 @@ class Imx_driver : public Gpio::Driver
void ack_irq(int pin)
{
_reg.write<Gpio_reg::Int_stat>(1, pin);
if (_irq_enabled[pin]) _reg.write<Gpio_reg::Int_mask>(1, pin);
}
void sigh(int pin, Genode::Signal_context_capability cap) {