Hi Geert,
On Monday 17 November 2014 12:43:00 Geert Uytterhoeven wrote:
> Since commit 2fd36c55264926e2 ("i2c: core: Map OF IRQ at probe time"),
> i2c slaves without interrupts (e.g. da9210 and at24 on r8a7791/koelsch)
> fail to probe:
>
> at24: probe of 2-0050 failed with error -22
>
> da9210: probe of 6-0068 failed with error -22
>
> This happens because the call to of_irq_get() in i2c_device_probe()
> returns -EINVAL.
>
> If a device node does not have an "interrupts" property,
> of_irq_parse_one() fails. Unlike irq_of_parse_and_map(), of_irq_get()
> does not ignore errors from of_irq_parse_one(), but forwards them.
>
> Make i2c_device_probe() ignore all errors but -EPROBE_DEFER to fix this,
> just like platform_get_irq() and platform_get_irq_byname() already do.
Thank you for fixing my mistake.
> Fixes: 2fd36c55264926e2 ("i2c: core: Map OF IRQ at probe time")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Just for the record, even if it's too late,
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/i2c/i2c-core.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index a0768d6dffc28aae..cf830915713b387a 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -629,8 +629,10 @@ static int i2c_device_probe(struct device *dev)
> if (!client->irq && dev->of_node) {
> int irq = of_irq_get(dev->of_node, 0);
>
> - if (irq < 0)
> + if (irq == -EPROBE_DEFER)
> return irq;
> + if (irq < 0)
> + irq = 0;
>
> client->irq = irq;
> }
--
Regards,
Laurent Pinchart
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