+ /*
+ * Some Cherry Trail boards with an ES8316 codec have a bug in their
+ * ACPI tables where the MSSL1680 touchscreen's _PS0 and _PS3 methods
+ * wrongly also set the speaker-enable GPIO to 1/0. Testing has shown
+ * that this really is a bug and the GPIO has no influence on the
+ * touchscreen at all.
+ *
+ * The silead.c touchscreen driver does not support runtime suspend, so
+ * the GPIO can only be changed underneath us during a system suspend.
+ * This resume() function runs from a pm complete() callback, and thus
+ * is guaranteed to run after the touchscreen driver/ACPI-subsys has
+ * brought the touchscreen back up again (and thus changed the GPIO).
+ *
+ * So to work around this we pass GPIOD_FLAGS_BIT_NONEXCLUSIVE when
+ * requesting the GPIO and we set its value here to undo any changes
+ * done by the touchscreen's broken _PS0 ACPI method.
+ */
+ gpiod_set_value_cansleep(priv->speaker_en_gpio, priv->speaker_en);
+