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Simple PCIe FMC carrier SPEC - Software
Commit 190258e4 authored by Alessandro Rubini's avatar Alessandro Rubini
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kernel/wr-nic: a different ack sequence to force an edge on gpio 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
parent 0f56da31
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Showing with 7 additions and 5 deletions
kernel/wr-nic-eth.c
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......@@ -77,12 +77,14 @@ irqreturn_t wrn_handler(int irq, void *dev_id)
* the typical trick you see in level-irq Ethernet drivers when
* they are plugged to edge-irq gpio lines: force an edge in case
* the line has become active again while we were serving it.
* (with a big thank you to Tomasz for the exact sequence to use)
* (with a big thank you to Tomasz and Grzegorz for the sequence)
*
* Actually, we should check the input line before doing this...
*/
writel(VIC_CTL_POL, &vic->CTL); /* not enabled */
udelay(1);
writel(VIC_CTL_ENABLE | VIC_CTL_POL, &vic->CTL);
writel(0, &vic->EOIR);
writel(WRN_ALL_MASK, &vic->IDR); /* disable sources */
writel(0xff, &vic->EOIR);
udelay(5);
writel(WRN_ALL_MASK, &vic->IER); /* enable sources again */
return ret;
}
......
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