1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2018, The Linux Foundation. All rights reserved. 3 #include <linux/clk-provider.h> 4 #include <linux/module.h> 5 #include <linux/platform_device.h> 6 #include <linux/regmap.h> 7 8 #include "clk-alpha-pll.h" 9 10 static const u8 ipq_pll_offsets[] = { 11 [PLL_OFF_L_VAL] = 0x08, 12 [PLL_OFF_ALPHA_VAL] = 0x10, 13 [PLL_OFF_USER_CTL] = 0x18, 14 [PLL_OFF_CONFIG_CTL] = 0x20, 15 [PLL_OFF_CONFIG_CTL_U] = 0x24, 16 [PLL_OFF_STATUS] = 0x28, 17 [PLL_OFF_TEST_CTL] = 0x30, 18 [PLL_OFF_TEST_CTL_U] = 0x34, 19 }; 20 21 static struct clk_alpha_pll ipq_pll = { 22 .offset = 0x0, 23 .regs = ipq_pll_offsets, 24 .flags = SUPPORTS_DYNAMIC_UPDATE, 25 .clkr = { 26 .enable_reg = 0x0, 27 .enable_mask = BIT(0), 28 .hw.init = &(struct clk_init_data){ 29 .name = "a53pll", 30 .parent_data = &(const struct clk_parent_data) { 31 .fw_name = "xo", 32 }, 33 .num_parents = 1, 34 .ops = &clk_alpha_pll_huayra_ops, 35 }, 36 }, 37 }; 38 39 static const struct alpha_pll_config ipq_pll_config = { 40 .l = 0x37, 41 .config_ctl_val = 0x04141200, 42 .config_ctl_hi_val = 0x0, 43 .early_output_mask = BIT(3), 44 .main_output_mask = BIT(0), 45 }; 46 47 static const struct regmap_config ipq_pll_regmap_config = { 48 .reg_bits = 32, 49 .reg_stride = 4, 50 .val_bits = 32, 51 .max_register = 0x40, 52 .fast_io = true, 53 }; 54 55 static int apss_ipq_pll_probe(struct platform_device *pdev) 56 { 57 struct device *dev = &pdev->dev; 58 struct regmap *regmap; 59 void __iomem *base; 60 int ret; 61 62 base = devm_platform_ioremap_resource(pdev, 0); 63 if (IS_ERR(base)) 64 return PTR_ERR(base); 65 66 regmap = devm_regmap_init_mmio(dev, base, &ipq_pll_regmap_config); 67 if (IS_ERR(regmap)) 68 return PTR_ERR(regmap); 69 70 clk_alpha_pll_configure(&ipq_pll, regmap, &ipq_pll_config); 71 72 ret = devm_clk_register_regmap(dev, &ipq_pll.clkr); 73 if (ret) 74 return ret; 75 76 return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, 77 &ipq_pll.clkr.hw); 78 } 79 80 static const struct of_device_id apss_ipq_pll_match_table[] = { 81 { .compatible = "qcom,ipq6018-a53pll" }, 82 { } 83 }; 84 85 static struct platform_driver apss_ipq_pll_driver = { 86 .probe = apss_ipq_pll_probe, 87 .driver = { 88 .name = "qcom-ipq-apss-pll", 89 .of_match_table = apss_ipq_pll_match_table, 90 }, 91 }; 92 module_platform_driver(apss_ipq_pll_driver); 93 94 MODULE_DESCRIPTION("Qualcomm technology Inc APSS ALPHA PLL Driver"); 95 MODULE_LICENSE("GPL v2"); 96