1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2018, The Linux Foundation. All rights reserved. 3 4 #include <linux/kernel.h> 5 #include <linux/init.h> 6 #include <linux/module.h> 7 #include <linux/platform_device.h> 8 #include <linux/of.h> 9 #include <linux/clk.h> 10 #include <linux/clk-provider.h> 11 #include <linux/regmap.h> 12 13 #include "clk-regmap.h" 14 #include "clk-hfpll.h" 15 16 static const struct hfpll_data hdata = { 17 .mode_reg = 0x00, 18 .l_reg = 0x04, 19 .m_reg = 0x08, 20 .n_reg = 0x0c, 21 .user_reg = 0x10, 22 .config_reg = 0x14, 23 .config_val = 0x430405d, 24 .status_reg = 0x1c, 25 .lock_bit = 16, 26 27 .user_val = 0x8, 28 .user_vco_mask = 0x100000, 29 .low_vco_max_rate = 1248000000, 30 .min_rate = 537600000UL, 31 .max_rate = 2900000000UL, 32 }; 33 34 static const struct of_device_id qcom_hfpll_match_table[] = { 35 { .compatible = "qcom,hfpll" }, 36 { } 37 }; 38 MODULE_DEVICE_TABLE(of, qcom_hfpll_match_table); 39 40 static const struct regmap_config hfpll_regmap_config = { 41 .reg_bits = 32, 42 .reg_stride = 4, 43 .val_bits = 32, 44 .max_register = 0x30, 45 .fast_io = true, 46 }; 47 48 static int qcom_hfpll_probe(struct platform_device *pdev) 49 { 50 struct resource *res; 51 struct device *dev = &pdev->dev; 52 void __iomem *base; 53 struct regmap *regmap; 54 struct clk_hfpll *h; 55 struct clk_init_data init = { 56 .parent_names = (const char *[]){ "xo" }, 57 .num_parents = 1, 58 .ops = &clk_ops_hfpll, 59 }; 60 61 h = devm_kzalloc(dev, sizeof(*h), GFP_KERNEL); 62 if (!h) 63 return -ENOMEM; 64 65 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 66 base = devm_ioremap_resource(dev, res); 67 if (IS_ERR(base)) 68 return PTR_ERR(base); 69 70 regmap = devm_regmap_init_mmio(&pdev->dev, base, &hfpll_regmap_config); 71 if (IS_ERR(regmap)) 72 return PTR_ERR(regmap); 73 74 if (of_property_read_string_index(dev->of_node, "clock-output-names", 75 0, &init.name)) 76 return -ENODEV; 77 78 h->d = &hdata; 79 h->clkr.hw.init = &init; 80 spin_lock_init(&h->lock); 81 82 return devm_clk_register_regmap(&pdev->dev, &h->clkr); 83 } 84 85 static struct platform_driver qcom_hfpll_driver = { 86 .probe = qcom_hfpll_probe, 87 .driver = { 88 .name = "qcom-hfpll", 89 .of_match_table = qcom_hfpll_match_table, 90 }, 91 }; 92 module_platform_driver(qcom_hfpll_driver); 93 94 MODULE_DESCRIPTION("QCOM HFPLL Clock Driver"); 95 MODULE_LICENSE("GPL v2"); 96 MODULE_ALIAS("platform:qcom-hfpll"); 97