Input: add Blackfin rotary input driver

This driver handles the Blackfin on-chip rotary peripheral.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/bfin_rotary.h b/arch/blackfin/include/asm/bfin_rotary.h
new file mode 100644
index 000000000000..425ece64fd5e
--- /dev/null
+++ b/arch/blackfin/include/asm/bfin_rotary.h
@@ -0,0 +1,39 @@
+/*
+ * board initialization should put one of these structures into platform_data
+ * and place the bfin-rotary onto platform_bus named "bfin-rotary".
+ */
+
+#ifndef _BFIN_ROTARY_H
+#define _BFIN_ROTARY_H
+
+/* mode bitmasks */
+#define ROT_QUAD_ENC    CNTMODE_QUADENC /* quadrature/grey code encoder mode */
+#define ROT_BIN_ENC     CNTMODE_BINENC  /* binary encoder mode */
+#define ROT_UD_CNT      CNTMODE_UDCNT   /* rotary counter mode */
+#define ROT_DIR_CNT     CNTMODE_DIRCNT  /* direction counter mode */
+
+#define ROT_DEBE        DEBE            /* Debounce Enable */
+
+#define ROT_CDGINV      CDGINV          /* CDG Pin Polarity Invert */
+#define ROT_CUDINV      CUDINV          /* CUD Pin Polarity Invert */
+#define ROT_CZMINV      CZMINV          /* CZM Pin Polarity Invert */
+
+struct bfin_rotary_platform_data {
+        /* set rotary UP KEY_### or BTN_### in case you prefer
+         * bfin-rotary to send EV_KEY otherwise set 0
+         */
+        unsigned int rotary_up_key;
+        /* set rotary DOWN KEY_### or BTN_### in case you prefer
+         * bfin-rotary to send EV_KEY otherwise set 0
+         */
+        unsigned int rotary_down_key;
+        /* set rotary BUTTON KEY_### or BTN_### */
+        unsigned int rotary_button_key;
+        /* set rotary Relative Axis REL_### in case you prefer
+         * bfin-rotary to send EV_REL otherwise set 0
+         */
+        unsigned int rotary_rel_code;
+        unsigned short debounce;        /* 0..17 */
+        unsigned short mode;
+};
+#endif