v4.19.13 snapshot.
diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
new file mode 100644
index 0000000..e038b04
--- /dev/null
+++ b/drivers/clk/sprd/common.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Spreadtrum clock infrastructure
+//
+// Copyright (C) 2017 Spreadtrum, Inc.
+// Author: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
+
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+
+#include "common.h"
+
+static const struct regmap_config sprdclk_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = 0xffff,
+ .fast_io = true,
+};
+
+static void sprd_clk_set_regmap(const struct sprd_clk_desc *desc,
+ struct regmap *regmap)
+{
+ int i;
+ struct sprd_clk_common *cclk;
+
+ for (i = 0; i < desc->num_clk_clks; i++) {
+ cclk = desc->clk_clks[i];
+ if (!cclk)
+ continue;
+
+ cclk->regmap = regmap;
+ }
+}
+
+int sprd_clk_regmap_init(struct platform_device *pdev,
+ const struct sprd_clk_desc *desc)
+{
+ void __iomem *base;
+ struct device_node *node = pdev->dev.of_node;
+ struct regmap *regmap;
+
+ if (of_find_property(node, "sprd,syscon", NULL)) {
+ regmap = syscon_regmap_lookup_by_phandle(node, "sprd,syscon");
+ if (IS_ERR_OR_NULL(regmap)) {
+ pr_err("%s: failed to get syscon regmap\n", __func__);
+ return PTR_ERR(regmap);
+ }
+ } else {
+ base = of_iomap(node, 0);
+ regmap = devm_regmap_init_mmio(&pdev->dev, base,
+ &sprdclk_regmap_config);
+ if (IS_ERR_OR_NULL(regmap)) {
+ pr_err("failed to init regmap\n");
+ return PTR_ERR(regmap);
+ }
+ }
+
+ sprd_clk_set_regmap(desc, regmap);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sprd_clk_regmap_init);
+
+int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw)
+{
+ int i, ret;
+ struct clk_hw *hw;
+
+ for (i = 0; i < clkhw->num; i++) {
+
+ hw = clkhw->hws[i];
+
+ if (!hw)
+ continue;
+
+ ret = devm_clk_hw_register(dev, hw);
+ if (ret) {
+ dev_err(dev, "Couldn't register clock %d - %s\n",
+ i, hw->init->name);
+ return ret;
+ }
+ }
+
+ ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clkhw);
+ if (ret)
+ dev_err(dev, "Failed to add clock provider\n");
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(sprd_clk_probe);
+
+MODULE_LICENSE("GPL v2");