1 files changed, 107 insertions, 0 deletions
diff --git a/drivers/clk/mediatek/clk-mux.h b/drivers/clk/mediatek/clk-mux.h
new file mode 100644
index 000000000..83ff420f4
--- /dev/null
+++ b/drivers/clk/mediatek/clk-mux.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ * Author: Owen Chen <owen.chen@mediatek.com>
+ */
+
+#ifndef __DRV_CLK_MTK_MUX_H
+#define __DRV_CLK_MTK_MUX_H
+
+#include <linux/notifier.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+struct clk;
+struct clk_hw_onecell_data;
+struct clk_ops;
+struct device;
+struct device_node;
+
+struct mtk_mux {
+	int id;
+	const char *name;
+	const char * const *parent_names;
+	unsigned int flags;
+
+	u32 mux_ofs;
+	u32 set_ofs;
+	u32 clr_ofs;
+	u32 upd_ofs;
+
+	u8 mux_shift;
+	u8 mux_width;
+	u8 gate_shift;
+	s8 upd_shift;
+
+	const struct clk_ops *ops;
+	signed char num_parents;
+};
+
+#define GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs,		\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			_gate, _upd_ofs, _upd, _flags, _ops) {		\
+		.id = _id,						\
+		.name = _name,						\
+		.mux_ofs = _mux_ofs,					\
+		.set_ofs = _mux_set_ofs,				\
+		.clr_ofs = _mux_clr_ofs,				\
+		.upd_ofs = _upd_ofs,					\
+		.mux_shift = _shift,					\
+		.mux_width = _width,					\
+		.gate_shift = _gate,					\
+		.upd_shift = _upd,					\
+		.parent_names = _parents,				\
+		.num_parents = ARRAY_SIZE(_parents),			\
+		.flags = _flags,					\
+		.ops = &_ops,						\
+	}
+
+extern const struct clk_ops mtk_mux_clr_set_upd_ops;
+extern const struct clk_ops mtk_mux_gate_clr_set_upd_ops;
+
+#define MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs,	\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			_gate, _upd_ofs, _upd, _flags)			\
+		GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs,	\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			_gate, _upd_ofs, _upd, _flags,			\
+			mtk_mux_gate_clr_set_upd_ops)
+
+#define MUX_GATE_CLR_SET_UPD(_id, _name, _parents, _mux_ofs,		\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			_gate, _upd_ofs, _upd)				\
+		MUX_GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents,	\
+			_mux_ofs, _mux_set_ofs, _mux_clr_ofs, _shift,	\
+			_width, _gate, _upd_ofs, _upd,			\
+			CLK_SET_RATE_PARENT)
+
+#define MUX_CLR_SET_UPD(_id, _name, _parents, _mux_ofs,			\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			_upd_ofs, _upd)					\
+		GATE_CLR_SET_UPD_FLAGS(_id, _name, _parents, _mux_ofs,	\
+			_mux_set_ofs, _mux_clr_ofs, _shift, _width,	\
+			0, _upd_ofs, _upd, CLK_SET_RATE_PARENT,		\
+			mtk_mux_clr_set_upd_ops)
+
+int mtk_clk_register_muxes(const struct mtk_mux *muxes,
+			   int num, struct device_node *node,
+			   spinlock_t *lock,
+			   struct clk_hw_onecell_data *clk_data);
+
+void mtk_clk_unregister_muxes(const struct mtk_mux *muxes, int num,
+			      struct clk_hw_onecell_data *clk_data);
+
+struct mtk_mux_nb {
+	struct notifier_block	nb;
+	const struct clk_ops	*ops;
+
+	u8	bypass_index;	/* Which parent to temporarily use */
+	u8	original_index;	/* Set by notifier callback */
+};
+
+#define to_mtk_mux_nb(_nb)	container_of(_nb, struct mtk_mux_nb, nb)
+
+int devm_mtk_clk_mux_notifier_register(struct device *dev, struct clk *clk,
+				       struct mtk_mux_nb *mux_nb);
+
+#endif /* __DRV_CLK_MTK_MUX_H */