97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2018, The Linux Foundation. All rights reserved.
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#include <linux/clk-provider.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include "clk-alpha-pll.h"
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static const u8 ipq_pll_offsets[] = {
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[PLL_OFF_L_VAL] = 0x08,
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[PLL_OFF_ALPHA_VAL] = 0x10,
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[PLL_OFF_USER_CTL] = 0x18,
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[PLL_OFF_CONFIG_CTL] = 0x20,
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[PLL_OFF_CONFIG_CTL_U] = 0x24,
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[PLL_OFF_STATUS] = 0x28,
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[PLL_OFF_TEST_CTL] = 0x30,
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[PLL_OFF_TEST_CTL_U] = 0x34,
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};
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static struct clk_alpha_pll ipq_pll = {
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.offset = 0x0,
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.regs = ipq_pll_offsets,
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.flags = SUPPORTS_DYNAMIC_UPDATE,
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.clkr = {
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.enable_reg = 0x0,
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.enable_mask = BIT(0),
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.hw.init = &(struct clk_init_data){
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.name = "a53pll",
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.parent_data = &(const struct clk_parent_data) {
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.fw_name = "xo",
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},
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.num_parents = 1,
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.ops = &clk_alpha_pll_huayra_ops,
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},
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},
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};
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static const struct alpha_pll_config ipq_pll_config = {
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.l = 0x37,
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.config_ctl_val = 0x04141200,
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.config_ctl_hi_val = 0x0,
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.early_output_mask = BIT(3),
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.main_output_mask = BIT(0),
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};
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static const struct regmap_config ipq_pll_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.max_register = 0x40,
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.fast_io = true,
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};
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static int apss_ipq_pll_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct regmap *regmap;
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void __iomem *base;
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int ret;
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base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(base))
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return PTR_ERR(base);
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regmap = devm_regmap_init_mmio(dev, base, &ipq_pll_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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clk_alpha_pll_configure(&ipq_pll, regmap, &ipq_pll_config);
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ret = devm_clk_register_regmap(dev, &ipq_pll.clkr);
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if (ret)
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return ret;
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return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
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&ipq_pll.clkr.hw);
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}
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static const struct of_device_id apss_ipq_pll_match_table[] = {
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{ .compatible = "qcom,ipq6018-a53pll" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, apss_ipq_pll_match_table);
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static struct platform_driver apss_ipq_pll_driver = {
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.probe = apss_ipq_pll_probe,
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.driver = {
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.name = "qcom-ipq-apss-pll",
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.of_match_table = apss_ipq_pll_match_table,
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},
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};
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module_platform_driver(apss_ipq_pll_driver);
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MODULE_DESCRIPTION("Qualcomm technology Inc APSS ALPHA PLL Driver");
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MODULE_LICENSE("GPL v2");
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