pinctrl: uniphier: add UniPhier pinctrl core support

The core support for the pinctrl drivers for all the UniPhier SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 113 insertions, 0 deletions

diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
new file mode 100644
index 00000000000..7eaec6a7024
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __PINCTRL_UNIPHIER_H__
+#define __PINCTRL_UNIPHIER_H__
+
+/* TODO: move this to include/linux/bug.h */
+#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#define UNIPHIER_PINCTRL_PINMUX_BASE	0x0
+#define UNIPHIER_PINCTRL_LOAD_PINMUX	0x700
+#define UNIPHIER_PINCTRL_IECTRL		0xd00
+
+#define UNIPHIER_PIN_ATTR_PACKED(iectrl)	(iectrl)
+
+static inline unsigned int uniphier_pin_get_iectrl(unsigned long data)
+{
+	return data;
+}
+
+/**
+ * struct uniphier_pinctrl_pin - pin data for UniPhier SoC
+ *
+ * @number: pin number
+ * @data: additional per-pin data
+ */
+struct uniphier_pinctrl_pin {
+	unsigned number;
+	unsigned long data;
+};
+
+/**
+ * struct uniphier_pinctrl_group - pin group data for UniPhier SoC
+ *
+ * @name: pin group name
+ * @pins: array of pins that belong to the group
+ * @num_pins: number of pins in the group
+ * @muxvals: array of values to be set to pinmux registers
+ */
+struct uniphier_pinctrl_group {
+	const char *name;
+	const unsigned *pins;
+	unsigned num_pins;
+	const unsigned *muxvals;
+};
+
+/**
+ * struct uniphier_pinctrl_socdata - SoC data for UniPhier pin controller
+ *
+ * @pins: array of pin data
+ * @pins_count: number of pin data
+ * @groups: array of pin group data
+ * @groups_count: number of pin group data
+ * @functions: array of pinmux function names
+ * @functions_count: number of pinmux functions
+ * @mux_bits: bit width of each pinmux register
+ * @reg_stride: stride of pinmux register address
+ * @load_pinctrl: if true, LOAD_PINMUX register must be set to one for new
+ *		  values in pinmux registers to become really effective
+ */
+struct uniphier_pinctrl_socdata {
+	const struct uniphier_pinctrl_pin *pins;
+	int pins_count;
+	const struct uniphier_pinctrl_group *groups;
+	int groups_count;
+	const char * const *functions;
+	int functions_count;
+	unsigned mux_bits;
+	unsigned reg_stride;
+	bool load_pinctrl;
+};
+
+#define UNIPHIER_PINCTRL_PIN(a, b)					\
+{									\
+	.number = a,							\
+	.data = UNIPHIER_PIN_ATTR_PACKED(b),				\
+}
+
+#define UNIPHIER_PINCTRL_GROUP(grp)					\
+	{								\
+		.name = #grp,						\
+		.pins = grp##_pins,					\
+		.num_pins = ARRAY_SIZE(grp##_pins),			\
+		.muxvals = grp##_muxvals +				\
+			BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) !=	\
+					  ARRAY_SIZE(grp##_muxvals)),	\
+	}
+
+/**
+ * struct uniphier_pinctrl_priv - private data for UniPhier pinctrl driver
+ *
+ * @base: base address of the pinctrl device
+ * @socdata: SoC specific data
+ */
+struct uniphier_pinctrl_priv {
+	void __iomem *base;
+	struct uniphier_pinctrl_socdata *socdata;
+};
+
+extern const struct pinctrl_ops uniphier_pinctrl_ops;
+
+int uniphier_pinctrl_probe(struct udevice *dev,
+			   struct uniphier_pinctrl_socdata *socdata);
+
+int uniphier_pinctrl_remove(struct udevice *dev);
+
+#endif /* __PINCTRL_UNIPHIER_H__ */