Merge tag 'renesas-drivers-for-v6.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into soc/drivers

Renesas driver updates for v6.20 (take two)

  - Add and use for_each_of_imap_item() iterator,
  - Add support for the RZ/N1 GPIO Interrupt Multiplexer.

* tag 'renesas-drivers-for-v6.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  soc: renesas: Add support for RZ/N1 GPIO Interrupt Multiplexer
  irqchip/renesas-rza1: Use for_each_of_imap_item iterator
  irqchip/ls-extirq: Use for_each_of_imap_item iterator
  of: unittest: Add a test case for for_each_of_imap_item iterator
  of/irq: Introduce for_each_of_imap_item

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

3 files changed, 195 insertions, 0 deletions

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index e3816819dbfe..f374d8b212b8 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -157,6 +157,76 @@ const __be32 *of_irq_parse_imap_parent(const __be32 *imap, int len, struct of_ph
 	return imap;
 }
 
+int of_imap_parser_init(struct of_imap_parser *parser, struct device_node *node,
+			struct of_imap_item *item)
+{
+	int imaplen;
+	u32 tmp;
+	int ret;
+
+	/*
+	 * parent_offset is the offset where the parent part is starting.
+	 * In other words, the offset where the parent interrupt controller
+	 * phandle is present.
+	 *
+	 * Compute this offset (child #interrupt-cells + child #address-cells)
+	 */
+	parser->parent_offset = of_bus_n_addr_cells(node);
+
+	ret = of_property_read_u32(node, "#interrupt-cells", &tmp);
+	if (ret)
+		return ret;
+
+	parser->parent_offset += tmp;
+
+	if (WARN(parser->parent_offset > ARRAY_SIZE(item->child_imap),
+		 "child part size = %u, cannot fit in array of %zu items",
+		 parser->parent_offset, ARRAY_SIZE(item->child_imap)))
+		return -EINVAL;
+
+	parser->imap = of_get_property(node, "interrupt-map", &imaplen);
+	if (!parser->imap)
+		return -ENOENT;
+
+	imaplen /= sizeof(*parser->imap);
+	parser->imap_end = parser->imap + imaplen;
+
+	memset(item, 0, sizeof(*item));
+	item->child_imap_count = parser->parent_offset;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_imap_parser_init);
+
+struct of_imap_item *of_imap_parser_one(struct of_imap_parser *parser,
+					struct of_imap_item *item)
+{
+	const __be32 *imap_parent, *imap_next;
+	int i;
+
+	/* Release previously get parent node */
+	of_node_put(item->parent_args.np);
+
+	if (parser->imap + parser->parent_offset + 1 >= parser->imap_end)
+		return NULL;
+
+	imap_parent = parser->imap + parser->parent_offset;
+
+	imap_next = of_irq_parse_imap_parent(imap_parent,
+					     parser->imap_end - imap_parent,
+					     &item->parent_args);
+	if (!imap_next)
+		return NULL;
+
+	for (i = 0; i < parser->parent_offset; i++)
+		item->child_imap[i] = be32_to_cpu(*(parser->imap + i));
+
+	parser->imap = imap_next;
+
+	return item;
+}
+EXPORT_SYMBOL_GPL(of_imap_parser_one);
+
 /**
  * of_irq_parse_raw - Low level interrupt tree parsing
  * @addr:	address specifier (start of "reg" property of the device) in be32 format
diff --git a/drivers/of/unittest-data/tests-interrupts.dtsi b/drivers/of/unittest-data/tests-interrupts.dtsi
index 4ccb54f91c30..974f888c9b15 100644
--- a/drivers/of/unittest-data/tests-interrupts.dtsi
+++ b/drivers/of/unittest-data/tests-interrupts.dtsi
@@ -50,6 +50,15 @@
 				interrupt-map = <0x5000 1 2 &test_intc0 15>;
 			};
 
+			intmap2 {
+				#interrupt-cells = <2>;
+				#address-cells = <0>;
+				interrupt-map = <1 11 &test_intc0 100>,
+						<2 22 &test_intc1 200 201 202>,
+						<3 33 &test_intc2 300 301>,
+						<4 44 &test_intc2 400 401>;
+			};
+
 			test_intc_intmap0: intc-intmap0 {
 				#interrupt-cells = <1>;
 				#address-cells = <1>;
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 388e9ec2cccf..d88a12f23ad5 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1654,6 +1654,121 @@ static void __init of_unittest_parse_interrupts_extended(void)
 	of_node_put(np);
 }
 
+struct of_unittest_expected_imap_item {
+	u32 child_imap_count;
+	u32 child_imap[2];
+	const char *parent_path;
+	int parent_args_count;
+	u32 parent_args[3];
+};
+
+static const struct of_unittest_expected_imap_item of_unittest_expected_imap_items[] = {
+	{
+		.child_imap_count = 2,
+		.child_imap = {1, 11},
+		.parent_path = "/testcase-data/interrupts/intc0",
+		.parent_args_count = 1,
+		.parent_args = {100},
+	}, {
+		.child_imap_count = 2,
+		.child_imap = {2, 22},
+		.parent_path = "/testcase-data/interrupts/intc1",
+		.parent_args_count = 3,
+		.parent_args = {200, 201, 202},
+	}, {
+		.child_imap_count = 2,
+		.child_imap = {3, 33},
+		.parent_path = "/testcase-data/interrupts/intc2",
+		.parent_args_count = 2,
+		.parent_args = {300, 301},
+	}, {
+		.child_imap_count = 2,
+		.child_imap = {4, 44},
+		.parent_path = "/testcase-data/interrupts/intc2",
+		.parent_args_count = 2,
+		.parent_args = {400, 401},
+	}
+};
+
+static void __init of_unittest_parse_interrupt_map(void)
+{
+	const struct of_unittest_expected_imap_item *expected_item;
+	struct device_node *imap_np, *expected_parent_np;
+	struct of_imap_parser imap_parser;
+	struct of_imap_item imap_item;
+	int count, ret, i;
+
+	if (of_irq_workarounds & (OF_IMAP_NO_PHANDLE | OF_IMAP_OLDWORLD_MAC))
+		return;
+
+	imap_np = of_find_node_by_path("/testcase-data/interrupts/intmap2");
+	if (!imap_np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	ret = of_imap_parser_init(&imap_parser, imap_np, &imap_item);
+	if (unittest(!ret, "of_imap_parser_init(%pOF) returned error %d\n",
+		     imap_np, ret))
+		goto end;
+
+	expected_item = of_unittest_expected_imap_items;
+	count = 0;
+
+	for_each_of_imap_item(&imap_parser, &imap_item) {
+		if (unittest(count < ARRAY_SIZE(of_unittest_expected_imap_items),
+			     "imap item number %d not expected. Max number %zu\n",
+			     count, ARRAY_SIZE(of_unittest_expected_imap_items) - 1)) {
+			of_node_put(imap_item.parent_args.np);
+			goto end;
+		}
+
+		expected_parent_np = of_find_node_by_path(expected_item->parent_path);
+		if (unittest(expected_parent_np,
+			     "missing dependent testcase data (%s)\n",
+			     expected_item->parent_path)) {
+			of_node_put(imap_item.parent_args.np);
+			goto end;
+		}
+
+		unittest(imap_item.child_imap_count == expected_item->child_imap_count,
+			 "imap[%d] child_imap_count = %u, expected %u\n",
+			 count, imap_item.child_imap_count,
+			 expected_item->child_imap_count);
+
+		for (i = 0; i < expected_item->child_imap_count; i++)
+			unittest(imap_item.child_imap[i] == expected_item->child_imap[i],
+				 "imap[%d] child_imap[%d] = %u, expected %u\n",
+				 count, i, imap_item.child_imap[i],
+				 expected_item->child_imap[i]);
+
+		unittest(imap_item.parent_args.np == expected_parent_np,
+			 "imap[%d] parent np = %pOF, expected %pOF\n",
+			 count, imap_item.parent_args.np, expected_parent_np);
+
+		unittest(imap_item.parent_args.args_count == expected_item->parent_args_count,
+			 "imap[%d] parent param_count = %d, expected %d\n",
+			 count, imap_item.parent_args.args_count,
+			 expected_item->parent_args_count);
+
+		for (i = 0; i < expected_item->parent_args_count; i++)
+			unittest(imap_item.parent_args.args[i] == expected_item->parent_args[i],
+				 "imap[%d] parent param[%d] = %u, expected %u\n",
+				 count, i, imap_item.parent_args.args[i],
+				 expected_item->parent_args[i]);
+
+		of_node_put(expected_parent_np);
+		count++;
+		expected_item++;
+	}
+
+	unittest(count == ARRAY_SIZE(of_unittest_expected_imap_items),
+		 "Missing items. %d parsed, expected %zu\n",
+		 count, ARRAY_SIZE(of_unittest_expected_imap_items));
+end:
+	of_node_put(imap_np);
+}
+
 #if IS_ENABLED(CONFIG_OF_DYNAMIC)
 static void __init of_unittest_irq_refcount(void)
 {
@@ -4395,6 +4510,7 @@ static int __init of_unittest(void)
 	of_unittest_changeset_prop();
 	of_unittest_parse_interrupts();
 	of_unittest_parse_interrupts_extended();
+	of_unittest_parse_interrupt_map();
 	of_unittest_irq_refcount();
 	of_unittest_dma_get_max_cpu_address();
 	of_unittest_parse_dma_ranges();