drivers/clk/qcom/mss-sc7180.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2020, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/clk-provider.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/module.h>
   9 #include <linux/pm_clock.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/regmap.h>
  12
  13 #include <dt-bindings/clock/qcom,mss-sc7180.h>
  14
  15 #include "clk-regmap.h"
  16 #include "clk-branch.h"
  17 #include "common.h"
  18
  19 static struct clk_branch mss_axi_nav_clk = {
  20         .halt_reg = 0x20bc,
  21         .halt_check = BRANCH_HALT,
  22         .clkr = {
  23                 .enable_reg = 0x20bc,
  24                 .enable_mask = BIT(0),
  25                 .hw.init = &(struct clk_init_data){
  26                         .name = "mss_axi_nav_clk",
  27                         .parent_data = &(const struct clk_parent_data){
  28                                 .fw_name = "gcc_mss_nav_axi",
  29                         },
  30                         .num_parents = 1,
  31                         .ops = &clk_branch2_ops,
  32                 },
  33         },
  34 };
  35
  36 static struct clk_branch mss_axi_crypto_clk = {
  37         .halt_reg = 0x20cc,
  38         .halt_check = BRANCH_HALT,
  39         .clkr = {
  40                 .enable_reg = 0x20cc,
  41                 .enable_mask = BIT(0),
  42                 .hw.init = &(struct clk_init_data){
  43                         .name = "mss_axi_crypto_clk",
  44                         .parent_data = &(const struct clk_parent_data){
  45                                 .fw_name = "gcc_mss_mfab_axis",
  46                         },
  47                         .num_parents = 1,
  48                         .ops = &clk_branch2_ops,
  49                 },
  50         },
  51 };
  52
  53 static const struct regmap_config mss_regmap_config = {
  54         .reg_bits       = 32,
  55         .reg_stride     = 4,
  56         .val_bits       = 32,
  57         .fast_io        = true,
  58         .max_register   = 0x41aa0cc,
  59 };
  60
  61 static struct clk_regmap *mss_sc7180_clocks[] = {
  62         [MSS_AXI_CRYPTO_CLK] = &mss_axi_crypto_clk.clkr,
  63         [MSS_AXI_NAV_CLK] = &mss_axi_nav_clk.clkr,
  64 };
  65
  66 static const struct qcom_cc_desc mss_sc7180_desc = {
  67         .config = &mss_regmap_config,
  68         .clks = mss_sc7180_clocks,
  69         .num_clks = ARRAY_SIZE(mss_sc7180_clocks),
  70 };
  71
  72 static int mss_sc7180_probe(struct platform_device *pdev)
  73 {
  74         int ret;
  75
  76         pm_runtime_enable(&pdev->dev);
  77         ret = pm_clk_create(&pdev->dev);
  78         if (ret)
  79                 goto disable_pm_runtime;
  80
  81         ret = pm_clk_add(&pdev->dev, "cfg_ahb");
  82         if (ret < 0) {
  83                 dev_err(&pdev->dev, "failed to acquire iface clock\n");
  84                 goto destroy_pm_clk;
  85         }
  86
  87         ret = qcom_cc_probe(pdev, &mss_sc7180_desc);
  88         if (ret < 0)
  89                 goto destroy_pm_clk;
  90
  91         return 0;
  92
  93 destroy_pm_clk:
  94         pm_clk_destroy(&pdev->dev);
  95
  96 disable_pm_runtime:
  97         pm_runtime_disable(&pdev->dev);
  98
  99         return ret;
 100 }
 101
 102 static int mss_sc7180_remove(struct platform_device *pdev)
 103 {
 104         pm_clk_destroy(&pdev->dev);
 105         pm_runtime_disable(&pdev->dev);
 106
 107         return 0;
 108 }
 109
 110 static const struct dev_pm_ops mss_sc7180_pm_ops = {
 111         SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
 112 };
 113
 114 static const struct of_device_id mss_sc7180_match_table[] = {
 115         { .compatible = "qcom,sc7180-mss" },
 116         { }
 117 };
 118 MODULE_DEVICE_TABLE(of, mss_sc7180_match_table);
 119
 120 static struct platform_driver mss_sc7180_driver = {
 121         .probe          = mss_sc7180_probe,
 122         .remove         = mss_sc7180_remove,
 123         .driver         = {
 124                 .name           = "sc7180-mss",
 125                 .of_match_table = mss_sc7180_match_table,
 126                 .pm = &mss_sc7180_pm_ops,
 127         },
 128 };
 129
 130 static int __init mss_sc7180_init(void)
 131 {
 132         return platform_driver_register(&mss_sc7180_driver);
 133 }
 134 subsys_initcall(mss_sc7180_init);
 135
 136 static void __exit mss_sc7180_exit(void)
 137 {
 138         platform_driver_unregister(&mss_sc7180_driver);
 139 }
 140 module_exit(mss_sc7180_exit);
 141
 142 MODULE_DESCRIPTION("QTI MSS SC7180 Driver");
 143 MODULE_LICENSE("GPL v2");