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1// SPDX-License-Identifier: GPL-2.02/*3 * Qualcomm A7 PLL driver4 *5 * Copyright (c) 2020, Linaro Limited6 * Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>7 */8 9#include <linux/clk-provider.h>10#include <linux/module.h>11#include <linux/platform_device.h>12#include <linux/regmap.h>13 14#include "clk-alpha-pll.h"15 16#define LUCID_PLL_OFF_L_VAL 0x0417 18static const struct pll_vco lucid_vco[] = {19 { 249600000, 2000000000, 0 },20};21 22static struct clk_alpha_pll a7pll = {23 .offset = 0x100,24 .vco_table = lucid_vco,25 .num_vco = ARRAY_SIZE(lucid_vco),26 .regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_LUCID],27 .clkr = {28 .hw.init = &(struct clk_init_data){29 .name = "a7pll",30 .parent_data = &(const struct clk_parent_data){31 .fw_name = "bi_tcxo",32 },33 .num_parents = 1,34 .ops = &clk_alpha_pll_lucid_ops,35 },36 },37};38 39static const struct alpha_pll_config a7pll_config = {40 .l = 0x39,41 .config_ctl_val = 0x20485699,42 .config_ctl_hi_val = 0x2261,43 .config_ctl_hi1_val = 0x029A699C,44 .user_ctl_val = 0x1,45 .user_ctl_hi_val = 0x805,46};47 48static const struct regmap_config a7pll_regmap_config = {49 .reg_bits = 32,50 .reg_stride = 4,51 .val_bits = 32,52 .max_register = 0x1000,53 .fast_io = true,54};55 56static int qcom_a7pll_probe(struct platform_device *pdev)57{58 struct device *dev = &pdev->dev;59 struct regmap *regmap;60 void __iomem *base;61 u32 l_val;62 int ret;63 64 base = devm_platform_ioremap_resource(pdev, 0);65 if (IS_ERR(base))66 return PTR_ERR(base);67 68 regmap = devm_regmap_init_mmio(dev, base, &a7pll_regmap_config);69 if (IS_ERR(regmap))70 return PTR_ERR(regmap);71 72 /* Configure PLL only if the l_val is zero */73 regmap_read(regmap, a7pll.offset + LUCID_PLL_OFF_L_VAL, &l_val);74 if (!l_val)75 clk_lucid_pll_configure(&a7pll, regmap, &a7pll_config);76 77 ret = devm_clk_register_regmap(dev, &a7pll.clkr);78 if (ret)79 return ret;80 81 return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,82 &a7pll.clkr.hw);83}84 85static const struct of_device_id qcom_a7pll_match_table[] = {86 { .compatible = "qcom,sdx55-a7pll" },87 { }88};89MODULE_DEVICE_TABLE(of, qcom_a7pll_match_table);90 91static struct platform_driver qcom_a7pll_driver = {92 .probe = qcom_a7pll_probe,93 .driver = {94 .name = "qcom-a7pll",95 .of_match_table = qcom_a7pll_match_table,96 },97};98module_platform_driver(qcom_a7pll_driver);99 100MODULE_DESCRIPTION("Qualcomm A7 PLL Driver");101MODULE_LICENSE("GPL v2");102