1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/pinctrl/zte/pinctrl-zx.h b/drivers/pinctrl/zte/pinctrl-zx.h
new file mode 100644
index 000000000000..bc67e2be0503
--- /dev/null
+++ b/drivers/pinctrl/zte/pinctrl-zx.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2017 Sanechips Technology Co., Ltd.
+ * Copyright 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PINCTRL_ZX_H
+#define __PINCTRL_ZX_H
+
+/**
+ * struct zx_mux_desc - hardware mux descriptor
+ * @name: mux function name
+ * @muxval: mux register bit value
+ */
+struct zx_mux_desc {
+	const char *name;
+	u8 muxval;
+};
+
+/**
+ * struct zx_pin_data - hardware per-pin data
+ * @aon_pin: whether it's an AON pin
+ * @offset: register offset within TOP pinmux controller
+ * @bitpos: bit position within TOP pinmux register
+ * @width: bit width within TOP pinmux register
+ * @coffset: pinconf register offset within AON controller
+ * @cbitpos: pinconf bit position within AON register
+ * @muxes: available mux function names and corresponding register values
+ *
+ * Unlike TOP pinmux and AON pinconf registers which are arranged pretty
+ * arbitrarily, AON pinmux register bits are well organized per pin id, and
+ * each pin occupies two bits, so that we can calculate the AON register offset
+ * and bit position from pin id.  Thus, we only need to define TOP pinmux and
+ * AON pinconf register data for the pin.
+ */
+struct zx_pin_data {
+	bool aon_pin;
+	u16 offset;
+	u16 bitpos;
+	u16 width;
+	u16 coffset;
+	u16 cbitpos;
+	struct zx_mux_desc *muxes;
+};
+
+struct zx_pinctrl_soc_info {
+	const struct pinctrl_pin_desc *pins;
+	unsigned int npins;
+};
+
+#define TOP_PIN(pin, off, bp, wd, coff, cbp, ...) {		\
+	.number = pin,						\
+	.name = #pin,						\
+	.drv_data = &(struct zx_pin_data) {			\
+		.aon_pin = false,				\
+		.offset = off,					\
+		.bitpos = bp,					\
+		.width = wd,					\
+		.coffset = coff,				\
+		.cbitpos = cbp,					\
+		.muxes = (struct zx_mux_desc[]) {		\
+			 __VA_ARGS__, { } },			\
+	},							\
+}
+
+#define AON_PIN(pin, off, bp, wd, coff, cbp, ...) {		\
+	.number = pin,						\
+	.name = #pin,						\
+	.drv_data = &(struct zx_pin_data) {			\
+		.aon_pin = true,				\
+		.offset = off,					\
+		.bitpos = bp,					\
+		.width = wd,					\
+		.coffset = coff,				\
+		.cbitpos = cbp,					\
+		.muxes = (struct zx_mux_desc[]) {		\
+			 __VA_ARGS__, { } },			\
+	},							\
+}
+
+#define ZX_RESERVED(pin) PINCTRL_PIN(pin, #pin)
+
+#define TOP_MUX(_val, _name) {					\
+	.name = _name,						\
+	.muxval = _val,						\
+}
+
+/*
+ * When the flag is set, it's a mux configuration for an AON pin that sits in
+ * AON register.  Otherwise, it's one for AON pin but sitting in TOP register.
+ */
+#define AON_MUX_FLAG BIT(7)
+
+#define AON_MUX(_val, _name) {					\
+	.name = _name,						\
+	.muxval = _val | AON_MUX_FLAG,				\
+}
+
+int zx_pinctrl_init(struct platform_device *pdev,
+		    struct zx_pinctrl_soc_info *info);
+
+#endif /* __PINCTRL_ZX_H */