The ALERT interrupt is enabled by default after power-on, but it could
be masked by bootloader. For example this is the case on Acer A500 tablet
device. Unmask the hardware interrupt if interrupt is provided.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
if (data->kind == max6696)
config &= ~0x08;
+ /*
+ * Interrupt is enabled by default on reset, but it may be disabled
+ * by bootloader, unmask it.
+ */
+ if (client->irq)
+ config &= ~0x80;
+
config &= 0xBF; /* run */
lm90_update_confreg(data, config);