[PATCH 02/16] arm: airoha: introduce AN7583 helpers to get SCU and CHIP_SCU regmaps

We need access SCU and CHIP_SCU regmaps in several places (clk-airoha,
reset-airoha, airoha_eth). Unfortunately these regmaps can't be easily
retrieved with a common code, because of different Airoha SoCs uses
a different dts structure.

To make life easy we can write a commonly named SoC specific helpers
for these tasks. This patch implements helpers for Airoha AN7583 SoC.

Signed-off-by: Mikhail Kshevetskiy <[email protected]>
---
 arch/arm/include/asm/arch-an7583         |  1 +
 arch/arm/mach-airoha/an7583/Makefile     |  1 +
 arch/arm/mach-airoha/an7583/scu-regmap.c | 34 ++++++++++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 120000 arch/arm/include/asm/arch-an7583
 create mode 100644 arch/arm/mach-airoha/an7583/scu-regmap.c

diff --git a/arch/arm/include/asm/arch-an7583 b/arch/arm/include/asm/arch-an7583
new file mode 120000
index 00000000000..d2317ed3bc3
--- /dev/null
+++ b/arch/arm/include/asm/arch-an7583
@@ -0,0 +1 @@
+arch-airoha
\ No newline at end of file
diff --git a/arch/arm/mach-airoha/an7583/Makefile b/arch/arm/mach-airoha/an7583/Makefile
index 886ab7e4eb9..51f978aa101 100644
--- a/arch/arm/mach-airoha/an7583/Makefile
+++ b/arch/arm/mach-airoha/an7583/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier:	GPL-2.0
 
 obj-y += init.o
+obj-y += scu-regmap.o
diff --git a/arch/arm/mach-airoha/an7583/scu-regmap.c b/arch/arm/mach-airoha/an7583/scu-regmap.c
new file mode 100644
index 00000000000..96f3564eec0
--- /dev/null
+++ b/arch/arm/mach-airoha/an7583/scu-regmap.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Author: Mikhail Kshevetskiy <[email protected]>
+ */
+
+#include <syscon.h>
+#include <linux/err.h>
+#include <asm/arch/scu-regmap.h>
+
+struct regmap *airoha_get_scu_regmap(void)
+{
+	ofnode node;
+
+	node = ofnode_by_compatible(ofnode_null(), "airoha,an7583-scu");
+	if (!ofnode_valid(node))
+		return ERR_PTR(-EINVAL);
+
+	node = ofnode_get_parent(node);
+	if (!ofnode_valid(node))
+		return ERR_PTR(-EINVAL);
+
+	return syscon_node_to_regmap(node);
+}
+
+struct regmap *airoha_get_chip_scu_regmap(void)
+{
+	ofnode node;
+
+	node = ofnode_by_compatible(ofnode_null(), "airoha,en7581-chip-scu");
+	if (!ofnode_valid(node))
+		return ERR_PTR(-EINVAL);
+
+	return syscon_node_to_regmap(node);
+}
-- 
2.53.0