input/ff: add control operation to force feedback driver interface

adds a generic control operation to the FF driver interface.

Signed-off-by: fangpeina <fangpeina@xiaomi.com>

drivers/input/ff_upper.c

@@ -429,7 +429,15 @@ static int ff_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         break;
 
       default:
+        if (upper->lower->control)
+          {
+            ret = upper->lower->control(upper->lower, cmd, arg);
+          }
+        else
+          {
             ret = -ENOTTY;
+          }
+
         break;
     }
 

include/nuttx/input/ff.h

@@ -451,6 +451,17 @@ struct ff_lowerhalf_s
   CODE int (*calibrate)(FAR struct ff_lowerhalf_s *lower,
                         unsigned long arg);
 
+  /* Called to set special configuration for the force feedback device,
+   * such as changing custom mode, setting custom resolution, reset, etc.
+   * All commands are parsed and implemented by lower half driver.
+   * Note: cmd - special command for device configuration, arg - parameters
+   * associated with the command. Returned value: Zero (OK) on success;
+   * -ENOTTY on failure.
+   */
+
+  CODE int (*control)(FAR struct ff_lowerhalf_s *lower,
+                      int cmd, unsigned long arg);
+
   /* The bitmap of force feedback capabilities truly supported by device */
 
   unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];