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| 8 | #include <linux/mfd/syscon.h>
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| 9 | #include <linux/module.h>
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| 10 | #include <linux/of_address.h>
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| 11 | #include <linux/platform_device.h>
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| 12 | #include <linux/regmap.h>
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| 13 |
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| 14 | #include "common.h"
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| 15 |
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| 16 | static const struct regmap_config sprdclk_regmap_config = {
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| 17 | .reg_bits = 32,
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| 18 | .reg_stride = 4,
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| 19 | .val_bits = 32,
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| 20 | .fast_io = true,
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| 21 | };
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| 22 |
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| 23 | static void sprd_clk_set_regmap(const struct sprd_clk_desc *desc,
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| 24 | struct regmap *regmap)
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| 25 | {
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| 26 | int i;
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| 27 | struct sprd_clk_common *cclk;
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| 28 |
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| 29 | for (i = 0; i < desc->num_clk_clks; i++) {
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| 30 | cclk = desc->clk_clks[i];
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| 31 | if (!cclk)
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| 32 | continue;
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| 33 |
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| 34 | cclk->regmap = regmap;
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| 35 | }
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| 36 | }
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| 37 |
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| 38 | int sprd_clk_regmap_init(struct platform_device *pdev,
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| 39 | const struct sprd_clk_desc *desc)
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| 40 | {
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| 41 | void __iomem *base;
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| 42 | struct device *dev = &pdev->dev;
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| 43 | struct device_node *node = dev->of_node, *np;
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| 44 | struct regmap *regmap;
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| 45 | struct resource *res;
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| 46 | struct regmap_config reg_config = sprdclk_regmap_config;
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| 47 |
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| 48 | if (of_property_present(node, "sprd,syscon")) {
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| 49 | regmap = syscon_regmap_lookup_by_phandle(node, "sprd,syscon");
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| 50 | if (IS_ERR(regmap)) {
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| 51 | pr_err("%s: failed to get syscon regmap\n", __func__);
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| 52 | return PTR_ERR(regmap);
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| 53 | }
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| 54 | } else if (of_device_is_compatible(np = of_get_parent(node), "syscon") ||
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| 55 | (of_node_put(np), 0)) {
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| 56 | regmap = device_node_to_regmap(np);
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| 57 | of_node_put(np);
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| 58 | if (IS_ERR(regmap)) {
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| 59 | dev_err(dev, "failed to get regmap from its parent.\n");
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| 60 | return PTR_ERR(regmap);
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| 61 | }
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| 62 | } else {
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| 63 | base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
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| 64 | if (IS_ERR(base))
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| 65 | return PTR_ERR(base);
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| 66 |
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| 67 | reg_config.max_register = resource_size(res) - reg_config.reg_stride;
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| 68 |
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| 69 | regmap = devm_regmap_init_mmio(&pdev->dev, base,
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| 70 | ®_config);
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| 71 | if (IS_ERR(regmap)) {
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| 72 | pr_err("failed to init regmap\n");
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| 73 | return PTR_ERR(regmap);
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | sprd_clk_set_regmap(desc, regmap);
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| 78 |
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| 79 | return 0;
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| 80 | }
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| 81 | EXPORT_SYMBOL_GPL(sprd_clk_regmap_init);
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| 82 |
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| 83 | int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw)
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| 84 | {
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| 85 | int i, ret;
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| 86 | struct clk_hw *hw;
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| 87 |
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| 88 | for (i = 0; i < clkhw->num; i++) {
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| 89 | const char *name;
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| 90 |
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| 91 | hw = clkhw->hws[i];
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| 92 | if (!hw)
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| 93 | continue;
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| 94 |
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| 95 | name = hw->init->name;
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| 96 | ret = devm_clk_hw_register(dev, hw);
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| 97 | if (ret) {
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| 98 | dev_err(dev, "Couldn't register clock %d - %s\n",
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| 99 | i, name);
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| 100 | return ret;
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clkhw);
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| 105 | if (ret)
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| 106 | dev_err(dev, "Failed to add clock provider\n");
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| 107 |
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| 108 | return ret;
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| 109 | }
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| 110 | EXPORT_SYMBOL_GPL(sprd_clk_probe);
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| 111 |
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| 112 | MODULE_DESCRIPTION("Spreadtrum clock infrastructure");
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| 113 | MODULE_LICENSE("GPL v2");
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