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| author | Sudeep Holla <sudeep.holla@arm.com> | 2016-11-17 04:01:26 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-11-17 20:16:33 +0300 |
| commit | dadbb0aa363bf1233f75cab23977add69d197e23 (patch) | |
| tree | 96c3b67ec3568e8b9c7e04bb31f46e1c03ad6e0b /drivers/input | |
| parent | fac96cc9f8679e31a244f98bed5983fe220e295c (diff) | |
| download | linux-dadbb0aa363bf1233f75cab23977add69d197e23.tar.xz | |
Input: gpio_keys - set input direction explicitly
Commit 700a38b27eef ("Input: gpio_keys - switch to using generic device
properties") switched to use generic device properties for GPIO keys and
commit 5feeca3c1e39 ("Input: gpio_keys - add support for GPIO descriptors")
switched from legacy GPIO numbers to GPIO descriptors.
Previously devm_gpio_request_one was explicitly passed GPIOF_DIR_IN flag
to set the GPIO direction as input. However devm_get_gpiod_from_child
doesn't have such provisions and hence fwnode_get_named_gpiod can't set
it as input.
This breaks few platforms with the following error:
" gpiochip_lock_as_irq: tried to flag a GPIO set as output for IRQ
unable to lock HW IRQ <n> for IRQ
genirq: Failed to request resources for POWER (irq <x>) on irqchip
gpio_keys: Unable to claim irq <x>; error -22
gpio-keys: probe failed with error -22 "
This patch fixes the issue by setting input direction explicitly for
gpio lines described by generic properties.
Fixes: 700a38b27eef ("Input: gpio_keys - switch to using generic device properties")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/gpio_keys.c | 7 | ||||
| -rw-r--r-- | drivers/input/keyboard/gpio_keys_polled.c | 8 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 5576f2ae0b71..582462d0af75 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -496,6 +496,13 @@ static int gpio_keys_setup_key(struct platform_device *pdev, error); return error; } + } else { + error = gpiod_direction_input(bdata->gpiod); + if (error) { + dev_err(dev, "Failed to configure GPIO %d as input: %d\n", + desc_to_gpio(bdata->gpiod), error); + return error; + } } } else if (gpio_is_valid(button->gpio)) { /* diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c index 72b350315d43..bed4f2086158 100644 --- a/drivers/input/keyboard/gpio_keys_polled.c +++ b/drivers/input/keyboard/gpio_keys_polled.c @@ -314,6 +314,14 @@ static int gpio_keys_polled_probe(struct platform_device *pdev) fwnode_handle_put(child); return error; } + + error = gpiod_direction_input(bdata->gpiod); + if (error) { + dev_err(dev, "Failed to configure GPIO %d as input: %d\n", + desc_to_gpio(bdata->gpiod), error); + fwnode_handle_put(child); + return error; + } } else if (gpio_is_valid(button->gpio)) { /* * Legacy GPIO number so request the GPIO here and |