devicetree: Add DT_INST version of some DT_*_HAS_* macros

Add DT_INST implementations of DT_PROP_HAS_IDX, DT_PHA_HAS_CELL_AT_IDX,
and DT_INST_PHA_HAS_CELL.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

include/devicetree.h

@@ -1071,6 +1071,18 @@
 #define DT_INST_PROP_BY_IDX(inst, prop, idx) \
 	DT_PROP_BY_IDX(DT_DRV_INST(inst), prop, idx)
 
+/**
+ * @brief Is index "idx" valid for an array type property
+ *        on a DT_DRV_COMPAT instance?
+ * @param inst instance number
+ * @param prop lowercase-and-underscores property name
+ * @param idx index to check
+ * @return 1 if "idx" is a valid index into the given property,
+ *         0 otherwise.
+ */
+#define DT_INST_PROP_HAS_IDX(inst, prop, idx) \
+	DT_PROP_HAS_IDX(DT_DRV_INST(inst), prop, idx)
+
 /**
  * @brief Get a DT_DRV_COMPAT property length
  * @param inst instance number
@@ -1329,6 +1341,31 @@
 #define DT_INST_NODE_HAS_PROP(inst, prop) \
 	DT_NODE_HAS_PROP(DT_DRV_INST(inst), prop)
 
+/**
+ * @brief Does a phandle array have a named cell specifier at an index?
+ *        for a DT_DRV_COMPAT instance
+ * @param inst instance number
+ * @param pha lowercase-and-underscores property with type "phandle-array"
+ * @param idx index to check
+ * @param cell named cell value whose existence to check
+ * @return 1 if the named cell exists in the specifier at index idx,
+ *         0 otherwise.
+ */
+#define DT_INST_PHA_HAS_CELL_AT_IDX(inst, pha, idx, cell) \
+	DT_PHA_HAS_CELL_AT_IDX(DT_DRV_INST(inst), pha, idx, cell)
+
+/**
+ * @brief Does a phandle array have a named cell specifier at index 0
+ *        for a DT_DRV_COMPAT instance?
+ * @param inst instance number
+ * @param pha lowercase-and-underscores property with type "phandle-array"
+ * @param cell named cell value whose existence to check
+ * @return 1 if the named cell exists in the specifier at index 0,
+ *         0 otherwise.
+ */
+#define DT_INST_PHA_HAS_CELL(inst, pha, cell) \
+	DT_INST_PHA_HAS_CELL_AT_IDX(inst, pha, 0, cell)
+
 /**
  * @brief is index valid for interrupt property on a DT_DRV_COMPAT instance?
  * Equivalent to DT_IRQ_HAS_IDX(DT_DRV_INST(inst), idx).

tests/lib/devicetree/src/main.c

@@ -581,7 +581,7 @@ static void test_phandles(void)
 	zassert_equal(ARRAY_SIZE(gps), 2, "gpios size");
 	zassert_equal(DT_PROP_LEN(TEST_PH, gpios), 2, "pha len");
 
-	/* DT_PHA_HAS_IDX */
+	/* DT_PROP_HAS_IDX */
 	zassert_true(DT_PROP_HAS_IDX(TEST_PH, gpios, 0), "has idx 0");
 	zassert_true(DT_PROP_HAS_IDX(TEST_PH, gpios, 1), "has idx 1");
 	zassert_false(DT_PROP_HAS_IDX(TEST_PH, gpios, 2), "!has idx 2");
@@ -686,8 +686,7 @@ static void test_phandles(void)
 			     "TEST_GPIO_2"),
 		     "gpios[1].label");
 
-#if 0
+	/* DT_INST_PROP_HAS_IDX */
-	/* DT_INST_PHA_HAS_IDX */
 	zassert_true(DT_INST_PROP_HAS_IDX(0, gpios, 0), "has idx 0");
 	zassert_true(DT_INST_PROP_HAS_IDX(0, gpios, 1), "has idx 1");
 	zassert_false(DT_INST_PROP_HAS_IDX(0, gpios, 2), "!has idx 2");
@@ -710,7 +709,6 @@ static void test_phandles(void)
 	/* DT_INST_PHA_HAS_CELL */
 	zassert_true(DT_INST_PHA_HAS_CELL(0, gpios, flags), "has gpio flags");
 	zassert_false(DT_INST_PHA_HAS_CELL(0, gpios, bar), "no gpio bar");
-#endif
 
 	/* DT_INST_PHANDLE_BY_IDX */
 	zassert_true(!strcmp(DT_LABEL(DT_INST_PHANDLE_BY_IDX(0, gpios, 0)),