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| author | Rouven Czerwinski <r.czerwinski@pengutronix.de> | 2023-12-07 08:58:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-05 15:12:28 +0100 |
| commit | 391c1019a005ec0a589590369b405eb0a68cc432 (patch) | |
| tree | b5e8f3524243c99318952fe5e4e00fe1f9a68900 | |
| parent | 6d7b8e5a6d916c07ab3339bdb2084e42cd1f8733 (diff) | |
| download | linux-391c1019a005ec0a589590369b405eb0a68cc432.tar.gz linux-391c1019a005ec0a589590369b405eb0a68cc432.tar.bz2 linux-391c1019a005ec0a589590369b405eb0a68cc432.zip | |
net: rfkill: gpio: set GPIO direction
commit 23484d817082c3005252d8edfc8292c8a1006b5b upstream.
Fix the undefined usage of the GPIO consumer API after retrieving the
GPIO description with GPIO_ASIS. The API documentation mentions that
GPIO_ASIS won't set a GPIO direction and requires the user to set a
direction before using the GPIO.
This can be confirmed on i.MX6 hardware, where rfkill-gpio is no longer
able to enabled/disable a device, presumably because the GPIO controller
was never configured for the output direction.
Fixes: b2f750c3a80b ("net: rfkill: gpio: prevent value glitch during probe")
Cc: stable@vger.kernel.org
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Link: https://msgid.link/20231207075835.3091694-1-r.czerwinski@pengutronix.de
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/rfkill/rfkill-gpio.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c index 2cc95c8dc4c7..f74baefd855d 100644 --- a/net/rfkill/rfkill-gpio.c +++ b/net/rfkill/rfkill-gpio.c @@ -116,6 +116,14 @@ static int rfkill_gpio_probe(struct platform_device *pdev) return -EINVAL; } + ret = gpiod_direction_output(rfkill->reset_gpio, true); + if (ret) + return ret; + + ret = gpiod_direction_output(rfkill->shutdown_gpio, true); + if (ret) + return ret; + rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev, rfkill->type, &rfkill_gpio_ops, rfkill); |