input: Add power button support for mc13783

This adds support for the power-on buttons of MC13783 PMIC.

Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index e55b2213623..edcd397cae1 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -703,6 +703,11 @@ static int mc13xxx_probe(struct spi_device *spi)
         enum mc13xxx_id id;
         int ret;
 
+        if (!pdata) {
+                dev_err(&spi->dev, "invalid platform data\n");
+                return -EINVAL;
+        }
+
         mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
         if (!mc13xxx)
                 return -ENOMEM;
@@ -763,6 +768,10 @@ err_revision:
                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
                                 pdata->leds, sizeof(*pdata->leds));
 
+        if (pdata->buttons)
+                mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
+                                pdata->buttons, sizeof(*pdata->buttons));
+
         return 0;
 }