From e82b762fb7e276cde121808cd34d575655c6d7d8 Mon Sep 17 00:00:00 2001
From: Nicolas Caramelli <caramelli.devel@gmail.com>
Date: Mon, 3 Jul 2023 10:47:50 +0200
Subject: [PATCH] input/touchscreen: Translate raw X/Y data into pixel
 coordinates

---
 drivers/input/Kconfig             | 16 ++++++++++++++++
 drivers/input/stmpe811_tsc.c      | 32 +++++++++++++++++++++++++++++++
 include/nuttx/input/touchscreen.h | 12 ++++++++++++
 3 files changed, 60 insertions(+)

diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig
index 2998726fa7..9b6421f62f 100644
--- a/drivers/input/Kconfig
+++ b/drivers/input/Kconfig
@@ -415,6 +415,22 @@ config STMPE811_SWAPXY
 	---help---
 		Reverse the meaning of X and Y to handle different LCD orientations.
 
+config STMPE811_OFFSETX
+	int "X offset"
+	default 0
+	depends on !STMPE811_TSC_DISABLE
+	---help---
+		Horizontal offset between the left edge of the touchscreen and
+		the left edge of the display area.
+
+config STMPE811_OFFSETY
+	int "Y offset"
+	default 0
+	depends on !STMPE811_TSC_DISABLE
+	---help---
+		Vertical offset between the top edge of the touchscreen and
+		the top edge of the display area.
+
 config STMPE811_THRESHX
 	int "X threshold"
 	default 12
diff --git a/drivers/input/stmpe811_tsc.c b/drivers/input/stmpe811_tsc.c
index 9a88393820..364b349499 100644
--- a/drivers/input/stmpe811_tsc.c
+++ b/drivers/input/stmpe811_tsc.c
@@ -573,6 +573,38 @@ static int stmpe811_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         }
         break;
 
+      case TSIOC_GETOFFSETX:  /* arg: Pointer to int offsetx config value */
+        {
+          FAR int *ptr = (FAR int *)((uintptr_t)arg);
+          DEBUGASSERT(ptr != NULL);
+          *ptr = CONFIG_STMPE811_OFFSETX;
+        }
+        break;
+
+      case TSIOC_GETOFFSETY:  /* arg: Pointer to int offsety config value */
+        {
+          FAR int *ptr = (FAR int *)((uintptr_t)arg);
+          DEBUGASSERT(ptr != NULL);
+          *ptr = CONFIG_STMPE811_OFFSETY;
+        }
+        break;
+
+      case TSIOC_GETTHRESHX:  /* arg: Pointer to int threshx config value */
+        {
+          FAR int *ptr = (FAR int *)((uintptr_t)arg);
+          DEBUGASSERT(ptr != NULL);
+          *ptr = CONFIG_STMPE811_THRESHX;
+        }
+        break;
+
+      case TSIOC_GETTHRESHY:  /* arg: Pointer to int threshy config value */
+        {
+          FAR int *ptr = (FAR int *)((uintptr_t)arg);
+          DEBUGASSERT(ptr != NULL);
+          *ptr = CONFIG_STMPE811_THRESHY;
+        }
+        break;
+
       default:
         ret = -ENOTTY;
         break;
diff --git a/include/nuttx/input/touchscreen.h b/include/nuttx/input/touchscreen.h
index a14e5850eb..3d6cabaf2b 100644
--- a/include/nuttx/input/touchscreen.h
+++ b/include/nuttx/input/touchscreen.h
@@ -76,6 +76,18 @@
                                              * struct g_tscaldata_s
                                              */
 #define TSIOC_USESCALED      _TSIOC(0x0009) /* arg: bool, yes/no */
+#define TSIOC_GETOFFSETX     _TSIOC(0x000a) /* arg: Pointer to
+                                             * int X offset value
+                                             */
+#define TSIOC_GETOFFSETY     _TSIOC(0x000b) /* arg: Pointer to
+                                             * int Y offset value
+                                             */
+#define TSIOC_GETTHRESHX     _TSIOC(0x000c) /* arg: Pointer to
+                                             * int X threshold value
+                                             */
+#define TSIOC_GETTHRESHY     _TSIOC(0x000d) /* arg: Pointer to
+                                             * int Y threshold value
+                                             */
 
 #define TSC_FIRST            0x0001          /* First common command */
 #define TSC_NCMDS            6               /* Six common commands */