Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/clk/sprd/mux.h b/drivers/clk/sprd/mux.h
new file mode 100644
index 000000000..548cfa0f1
--- /dev/null
+++ b/drivers/clk/sprd/mux.h
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Spreadtrum multiplexer clock driver
+//
+// Copyright (C) 2017 Spreadtrum, Inc.
+// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
+
+#ifndef _SPRD_MUX_H_
+#define _SPRD_MUX_H_
+
+#include "common.h"
+
+/**
+ * struct sprd_mux_ssel - Mux clock's source select bits in its register
+ * @shift: Bit offset of the divider in its register
+ * @width: Width of the divider field in its register
+ * @table: For some mux clocks, not all sources are used on some special
+ *	   chips, this matches the value of mux clock's register and the
+ *	   sources which are used for this mux clock
+ */
+struct sprd_mux_ssel {
+	u8		shift;
+	u8		width;
+	const u8	*table;
+};
+
+struct sprd_mux {
+	struct sprd_mux_ssel mux;
+	struct sprd_clk_common	common;
+};
+
+#define _SPRD_MUX_CLK(_shift, _width, _table)		\
+	{						\
+		.shift	= _shift,			\
+		.width	= _width,			\
+		.table	= _table,			\
+	}
+
+#define SPRD_MUX_CLK_TABLE(_struct, _name, _parents, _table,		\
+				     _reg, _shift, _width,		\
+				     _flags)				\
+	struct sprd_mux _struct = {					\
+		.mux	= _SPRD_MUX_CLK(_shift, _width, _table),	\
+		.common	= {						\
+			.regmap		= NULL,				\
+			.reg		= _reg,				\
+			.hw.init = CLK_HW_INIT_PARENTS(_name,		\
+						       _parents,	\
+						       &sprd_mux_ops,	\
+						       _flags),		\
+		}							\
+	}
+
+#define SPRD_MUX_CLK(_struct, _name, _parents, _reg,		\
+		     _shift, _width, _flags)			\
+	SPRD_MUX_CLK_TABLE(_struct, _name, _parents, NULL,	\
+			   _reg, _shift, _width, _flags)
+
+static inline struct sprd_mux *hw_to_sprd_mux(const struct clk_hw *hw)
+{
+	struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
+
+	return container_of(common, struct sprd_mux, common);
+}
+
+extern const struct clk_ops sprd_mux_ops;
+
+u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
+			      const struct sprd_mux_ssel *mux);
+int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
+			       const struct sprd_mux_ssel *mux,
+			       u8 index);
+
+#endif /* _SPRD_MUX_H_ */