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- // 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(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++) {
- const char *name;
- hw = clkhw->hws[i];
- if (!hw)
- continue;
- name = hw->init->name;
- ret = devm_clk_hw_register(dev, hw);
- if (ret) {
- dev_err(dev, "Couldn't register clock %d - %s\n",
- i, 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");
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