1 files changed, 57 insertions, 0 deletions
diff --git a/include/dt-bindings/sound/cs35l45.h b/include/dt-bindings/sound/cs35l45.h
index 076da4b2c28d..25386af18445 100644
--- a/include/dt-bindings/sound/cs35l45.h
+++ b/include/dt-bindings/sound/cs35l45.h
@@ -17,4 +17,61 @@
 #define CS35L45_ASP_TX_HIZ_UNUSED	0x1
 #define CS35L45_ASP_TX_HIZ_DISABLED	0x2
 
+/*
+ * Optional GPIOX Sub-nodes:
+ *  The cs35l45 node can have up to three "cirrus,gpio-ctrlX" ('X' = [1,2,3])
+ *  sub-nodes for configuring the GPIO pins.
+ *
+ * - gpio-dir : GPIO pin direction. Valid only when 'gpio-ctrl'
+ *   is 1.
+ *    0 = Output
+ *    1 = Input (Default)
+ *
+ * - gpio-lvl : GPIO level. Valid only when 'gpio-ctrl' is 1 and 'gpio-dir' is 0.
+ *
+ *    0 = Low (Default)
+ *    1 = High
+ *
+ * - gpio-op-cfg : GPIO output configuration. Valid only when 'gpio-ctrl' is 1
+ *   and 'gpio-dir' is 0.
+ *
+ *    0 = CMOS (Default)
+ *    1 = Open Drain
+ *
+ * - gpio-pol : GPIO output polarity select. Valid only when 'gpio-ctrl' is 1
+ *   and 'gpio-dir' is 0.
+ *
+ *    0 = Non-inverted, Active High (Default)
+ *    1 = Inverted, Active Low
+ *
+ * - gpio-invert : Defines the polarity of the GPIO pin if configured
+ *   as input.
+ *
+ *    0 = Not inverted (Default)
+ *    1 = Inverted
+ *
+ * - gpio-ctrl : Defines the function of the GPIO pin.
+ *
+ * GPIO1:
+ *   0 = High impedance input (Default)
+ *   1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+ *   2 = Pin acts as MDSYNC, direction controlled by MDSYNC
+ *   3-7 = Reserved
+ *
+ * GPIO2:
+ *   0 = High impedance input (Default)
+ *   1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+ *   2 = Pin acts as open drain INT
+ *   3 = Reserved
+ *   4 = Pin acts as push-pull output INT. Active low.
+ *   5 = Pin acts as push-pull output INT. Active high.
+ *   6,7 = Reserved
+ *
+ * GPIO3:
+ *   0 = High impedance input (Default)
+ *   1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+ *   2-7 = Reserved
+ */
+#define CS35L45_NUM_GPIOS	0x3
+
 #endif /* DT_CS35L45_H */