Re: Why isn't IRQ shared for i2c-ocore

From: Geert Uytterhoeven
Date: Fri May 08 2015 - 02:47:50 EST

On Thu, May 7, 2015 at 9:01 AM, Lee Jones <lee.jones@xxxxxxxxxx> wrote:
>> I have a follow up question regarding interrupt. I see many I2C bus drivers
>> request interrupt with flag = 0. Why not using IRQF_SHARED?
> Probably because that particular IRQ is only used by the I2C
> Controller. I'm not exactly sure that you're getting at? Why do you
> think it should be shared? You should only flag it as shared if it
> is.

However, that's something the driver can't know.
Sharing interrupts is an integration property. The same IP core may share its
interrupt on one SoC, and not on another.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at