ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/clk/sprd/mux.c b/marvell/linux/drivers/clk/sprd/mux.c
new file mode 100644
index 0000000..624041b
--- /dev/null
+++ b/marvell/linux/drivers/clk/sprd/mux.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Spreadtrum multiplexer clock driver
+//
+// Copyright (C) 2017 Spreadtrum, Inc.
+// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+
+#include "mux.h"
+
+u8 sprd_mux_helper_get_parent(const struct sprd_clk_common *common,
+ const struct sprd_mux_ssel *mux)
+{
+ unsigned int reg;
+ u8 parent;
+ int num_parents;
+ int i;
+
+ regmap_read(common->regmap, common->reg, ®);
+ parent = reg >> mux->shift;
+ parent &= (1 << mux->width) - 1;
+
+ if (!mux->table)
+ return parent;
+
+ num_parents = clk_hw_get_num_parents(&common->hw);
+
+ for (i = 0; i < num_parents - 1; i++)
+ if (parent >= mux->table[i] && parent < mux->table[i + 1])
+ return i;
+
+ return num_parents - 1;
+}
+EXPORT_SYMBOL_GPL(sprd_mux_helper_get_parent);
+
+static u8 sprd_mux_get_parent(struct clk_hw *hw)
+{
+ struct sprd_mux *cm = hw_to_sprd_mux(hw);
+
+ return sprd_mux_helper_get_parent(&cm->common, &cm->mux);
+}
+
+int sprd_mux_helper_set_parent(const struct sprd_clk_common *common,
+ const struct sprd_mux_ssel *mux,
+ u8 index)
+{
+ unsigned int reg;
+
+ if (mux->table)
+ index = mux->table[index];
+
+ regmap_read(common->regmap, common->reg, ®);
+ reg &= ~GENMASK(mux->width + mux->shift - 1, mux->shift);
+ regmap_write(common->regmap, common->reg,
+ reg | (index << mux->shift));
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sprd_mux_helper_set_parent);
+
+static int sprd_mux_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct sprd_mux *cm = hw_to_sprd_mux(hw);
+
+ return sprd_mux_helper_set_parent(&cm->common, &cm->mux, index);
+}
+
+const struct clk_ops sprd_mux_ops = {
+ .get_parent = sprd_mux_get_parent,
+ .set_parent = sprd_mux_set_parent,
+ .determine_rate = __clk_mux_determine_rate,
+};
+EXPORT_SYMBOL_GPL(sprd_mux_ops);