On some systems (Intel tablets with axp288 pmic) the powerbutton is
also connected to a gpio pin of the SoC, advertised through the
"INTCFD9" / "PNP0C40" acpi device. This leads to double reporting
of powerbutton events, which is undesirable, so one driver needs
to not report input events in this case.
Since the soc_button_array driver for the "PNP0C40" acpi device
also handles wake from suspend on these tablets and since the
axp20x-pel driver requires relative expensive i2c accrsses,
it is best for the axp20x-pek driver to not register an input device
in this case.
Note that this commit leaves the axp20x-driver bound to the
device, rather then returning -ENODEV, this is done so that the
sysfs attributes it offers are kept around.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/input/misc/axp20x-pek.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index b7258ec..dbd2c89 100644
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -13,6 +13,7 @@
* GNU General Public License for more details.
*/
+#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/init.h>
@@ -267,9 +268,16 @@ static int axp20x_pek_probe(struct platform_device *pdev)
axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent);
- error = axp20x_pek_probe_input_device(axp20x_pek, pdev);
- if (error)
- return error;
+ /*
+ * Do not register the input device if there is an "INTCFD9"
+ * gpio button ACPI device, that handles the power button too,
+ * and otherwise we end up reporting all presses twice.
+ */
+ if (!acpi_dev_found("INTCFD9")) {
+ error = axp20x_pek_probe_input_device(axp20x_pek, pdev);
+ if (error)
+ return error;
+ }
error = sysfs_create_group(&pdev->dev.kobj, &axp20x_attribute_group);
if (error) {
--
2.9.3
--
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