Hi Dmitry,
Thank you for your feedback.
A patch got already pushed earlier this month:
https://lists.01.org/pipermail/linux-nfc/2014-November/003123.html
The i2c-core is already running the i2c_of_parse_and_map function when
registering the slave device when using dts. This step got removed for
this reason.
However, i will take into account your second point in order to report
devm_gpio_request_one instead of -ENODEV in a future patchset.
Best Regards
Christophe
On Fri, 14 Nov 2014 14:32:24 -0800
Dmitry Torokhov <d...@chromium.org> wrote:
> Return value of irq_of_parse_and_map() is unsigned int, with 0
> indicating failure, so testing for negative result never works.
>
> Also report error returned by devm_gpio_request_one instead of
> clobbering it with -ENODEV.
>
> Signed-off-by: Dmitry Torokhov <d...@chromium.org>
> ---
> drivers/nfc/st21nfca/i2c.c | 11 +++++------
> 1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/nfc/st21nfca/i2c.c b/drivers/nfc/st21nfca/i2c.c
> index 0ea756b..6d6d282 100644
> --- a/drivers/nfc/st21nfca/i2c.c
> +++ b/drivers/nfc/st21nfca/i2c.c
> @@ -531,20 +531,19 @@ static int
> st21nfca_hci_i2c_of_request_resources(struct i2c_client *client)
> "clf_enable"); if (r) {
> nfc_err(&client->dev, "Failed to request enable
> pin\n");
> - return -ENODEV;
> + return r;
> }
>
> phy->gpio_ena = gpio;
>
> /* IRQ */
> - r = irq_of_parse_and_map(pp, 0);
> - if (r < 0) {
> - nfc_err(&client->dev, "Unable to get irq, error:
> %d\n", r);
> - return r;
> + client->irq = irq_of_parse_and_map(pp, 0);
> + if (!client->irq) {
> + nfc_err(&client->dev, "Unable to get irq\n");
> + return -EINVAL;
> }
>
> phy->irq_polarity = irq_get_trigger_type(r);
> - client->irq = r;
>
> return 0;
> }
--
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