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-rw-r--r--drivers/clk/sprd/div.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/clk/sprd/div.h b/drivers/clk/sprd/div.h
new file mode 100644
index 000000000..6acfe6b17
--- /dev/null
+++ b/drivers/clk/sprd/div.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+//
+// Spreadtrum divider clock driver
+//
+// Copyright (C) 2017 Spreadtrum, Inc.
+// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
+
+#ifndef _SPRD_DIV_H_
+#define _SPRD_DIV_H_
+
+#include "common.h"
+
+/**
+ * struct sprd_div_internal - Internal divider description
+ * @shift: Bit offset of the divider in its register
+ * @width: Width of the divider field in its register
+ *
+ * That structure represents a single divider, and is meant to be
+ * embedded in other structures representing the various clock
+ * classes.
+ */
+struct sprd_div_internal {
+ u8 shift;
+ u8 width;
+};
+
+#define _SPRD_DIV_CLK(_shift, _width) \
+ { \
+ .shift = _shift, \
+ .width = _width, \
+ }
+
+struct sprd_div {
+ struct sprd_div_internal div;
+ struct sprd_clk_common common;
+};
+
+#define SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
+ _shift, _width, _flags, _fn) \
+ struct sprd_div _struct = { \
+ .div = _SPRD_DIV_CLK(_shift, _width), \
+ .common = { \
+ .regmap = NULL, \
+ .reg = _reg, \
+ .hw.init = _fn(_name, _parent, \
+ &sprd_div_ops, _flags), \
+ } \
+ }
+
+#define SPRD_DIV_CLK(_struct, _name, _parent, _reg, \
+ _shift, _width, _flags) \
+ SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
+ _shift, _width, _flags, CLK_HW_INIT)
+
+#define SPRD_DIV_CLK_HW(_struct, _name, _parent, _reg, \
+ _shift, _width, _flags) \
+ SPRD_DIV_CLK_HW_INIT_FN(_struct, _name, _parent, _reg, \
+ _shift, _width, _flags, CLK_HW_INIT_HW)
+
+static inline struct sprd_div *hw_to_sprd_div(const struct clk_hw *hw)
+{
+ struct sprd_clk_common *common = hw_to_sprd_clk_common(hw);
+
+ return container_of(common, struct sprd_div, common);
+}
+
+long sprd_div_helper_round_rate(struct sprd_clk_common *common,
+ const struct sprd_div_internal *div,
+ unsigned long rate,
+ unsigned long *parent_rate);
+
+unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,
+ const struct sprd_div_internal *div,
+ unsigned long parent_rate);
+
+int sprd_div_helper_set_rate(const struct sprd_clk_common *common,
+ const struct sprd_div_internal *div,
+ unsigned long rate,
+ unsigned long parent_rate);
+
+extern const struct clk_ops sprd_div_ops;
+
+#endif /* _SPRD_DIV_H_ */