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authorAndrew Clayton <andrew@digital-domain.net>2010-02-11 10:18:05 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2010-02-11 10:19:48 +0300
commit5deeac99fe1146532eb7c64f9adb17d17628d751 (patch)
tree06eb8fb3bc111caa5c0b6a3bfd47d5953d3094d1 /drivers/input/misc/rotary_encoder.c
parent8f8be2439cd368cc6ba94888919ee90b5a26f0cb (diff)
downloadlinux-5deeac99fe1146532eb7c64f9adb17d17628d751.tar.xz
Input: rotary-encoder - set gpio direction for each requested gpio
Even with the correct pin mux settings, you still need to explicitly set the gpio direction. Call gpio_direction_input() after each requested gpio. Signed-off-by: Andrew Clayton <andrew@digital-domain.net> Signed-off-by: Mark Somerville <mark@scottishclimbs.com> Tested-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/misc/rotary_encoder.c')
-rw-r--r--drivers/input/misc/rotary_encoder.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c
index 3b9f588fc747..4ae07935985e 100644
--- a/drivers/input/misc/rotary_encoder.c
+++ b/drivers/input/misc/rotary_encoder.c
@@ -152,6 +152,13 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
goto exit_unregister_input;
}
+ err = gpio_direction_input(pdata->gpio_a);
+ if (err) {
+ dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
+ pdata->gpio_a);
+ goto exit_unregister_input;
+ }
+
err = gpio_request(pdata->gpio_b, DRV_NAME);
if (err) {
dev_err(&pdev->dev, "unable to request GPIO %d\n",
@@ -159,6 +166,13 @@ static int __devinit rotary_encoder_probe(struct platform_device *pdev)
goto exit_free_gpio_a;
}
+ err = gpio_direction_input(pdata->gpio_b);
+ if (err) {
+ dev_err(&pdev->dev, "unable to set GPIO %d for input\n",
+ pdata->gpio_b);
+ goto exit_free_gpio_a;
+ }
+
/* request the IRQs */
err = request_irq(encoder->irq_a, &rotary_encoder_irq,
IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE,