soc: riscv: telink_b91: new pinctrl driver support

Added basic support for new pinctrl driver.

Signed-off-by: Yuriy Vynnychek <yura.vynnychek@telink-semi.com>

soc/riscv/riscv-privilege/telink_b91/Kconfig.defconfig.series

@@ -31,6 +31,9 @@ config NUM_IRQS
 	int
 	default 64
 
+config PINCTRL
+	default y
+
 config XIP
 	bool
 	default n

soc/riscv/riscv-privilege/telink_b91/pinctrl_soc.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2022 Telink Semiconductor
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef SOC_RISCV_TELINK_B91_PINCTRL_SOC_H
+#define SOC_RISCV_TELINK_B91_PINCTRL_SOC_H
+
+#include <stdint.h>
+#include <devicetree.h>
+#include <dt-bindings/pinctrl/b91-pinctrl.h>
+
+/**
+ * @brief Telink B91 pin type.
+ */
+typedef uint32_t pinctrl_soc_pin_t;
+
+/**
+ * @brief Utility macro to initialize each pin.
+ *
+ * @param node_id Node identifier.
+ * @param prop Property name.
+ * @param idx Property entry index.
+ */
+#define Z_PINCTRL_STATE_PIN_INIT(node_id, prop, idx)					\
+	(DT_PROP(DT_PROP_BY_IDX(node_id, prop, idx), pinmux) |				\
+	 ((B91_PULL_DOWN * DT_PROP(DT_PROP_BY_IDX(node_id, prop, idx), bias_pull_down))	\
+		<< B91_PULL_POS) |							\
+	 ((B91_PULL_UP * DT_PROP(DT_PROP_BY_IDX(node_id, prop, idx), bias_pull_up))	\
+		<< B91_PULL_POS)							\
+	),
+
+/**
+ * @brief Utility macro to initialize state pins contained in a given property.
+ *
+ * @param node_id Node identifier.
+ * @param prop Property name describing state pins.
+ */
+#define Z_PINCTRL_STATE_PINS_INIT(node_id, prop) \
+	{ DT_FOREACH_PROP_ELEM(node_id, prop, Z_PINCTRL_STATE_PIN_INIT) }
+
+#endif  /* SOC_RISCV_TELINK_B91_PINCTRL_SOC_H */