drivers/clk/qcom/apss-ipq6018.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2018, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/err.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/clk-provider.h>
  10 #include <linux/regmap.h>
  11 #include <linux/module.h>
  12
  13 #include <dt-bindings/clock/qcom,apss-ipq.h>
  14
  15 #include "common.h"
  16 #include "clk-regmap.h"
  17 #include "clk-branch.h"
  18 #include "clk-alpha-pll.h"
  19 #include "clk-regmap-mux.h"
  20
  21 enum {
  22         P_XO,
  23         P_APSS_PLL_EARLY,
  24 };
  25
  26 static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
  27         { .fw_name = "xo" },
  28         { .fw_name = "pll" },
  29 };
  30
  31 static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
  32         { P_XO, 0 },
  33         { P_APSS_PLL_EARLY, 5 },
  34 };
  35
  36 static struct clk_regmap_mux apcs_alias0_clk_src = {
  37         .reg = 0x0050,
  38         .width = 3,
  39         .shift = 7,
  40         .parent_map = parents_apcs_alias0_clk_src_map,
  41         .clkr.hw.init = &(struct clk_init_data){
  42                 .name = "apcs_alias0_clk_src",
  43                 .parent_data = parents_apcs_alias0_clk_src,
  44                 .num_parents = 2,
  45                 .ops = &clk_regmap_mux_closest_ops,
  46                 .flags = CLK_SET_RATE_PARENT,
  47         },
  48 };
  49
  50 static struct clk_branch apcs_alias0_core_clk = {
  51         .halt_reg = 0x0058,
  52         .clkr = {
  53                 .enable_reg = 0x0058,
  54                 .enable_mask = BIT(0),
  55                 .hw.init = &(struct clk_init_data){
  56                         .name = "apcs_alias0_core_clk",
  57                         .parent_hws = (const struct clk_hw *[]){
  58                                 &apcs_alias0_clk_src.clkr.hw },
  59                         .num_parents = 1,
  60                         .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
  61                         .ops = &clk_branch2_ops,
  62                 },
  63         },
  64 };
  65
  66 static const struct regmap_config apss_ipq6018_regmap_config = {
  67         .reg_bits       = 32,
  68         .reg_stride     = 4,
  69         .val_bits       = 32,
  70         .max_register   = 0x1000,
  71         .fast_io        = true,
  72 };
  73
  74 static struct clk_regmap *apss_ipq6018_clks[] = {
  75         [APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
  76         [APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
  77 };
  78
  79 static const struct qcom_cc_desc apss_ipq6018_desc = {
  80         .config = &apss_ipq6018_regmap_config,
  81         .clks = apss_ipq6018_clks,
  82         .num_clks = ARRAY_SIZE(apss_ipq6018_clks),
  83 };
  84
  85 static int apss_ipq6018_probe(struct platform_device *pdev)
  86 {
  87         struct regmap *regmap;
  88
  89         regmap = dev_get_regmap(pdev->dev.parent, NULL);
  90         if (!regmap)
  91                 return -ENODEV;
  92
  93         return qcom_cc_really_probe(pdev, &apss_ipq6018_desc, regmap);
  94 }
  95
  96 static struct platform_driver apss_ipq6018_driver = {
  97         .probe = apss_ipq6018_probe,
  98         .driver = {
  99                 .name   = "qcom,apss-ipq6018-clk",
 100         },
 101 };
 102
 103 module_platform_driver(apss_ipq6018_driver);
 104
 105 MODULE_DESCRIPTION("QCOM APSS IPQ 6018 CLK Driver");
 106 MODULE_LICENSE("GPL v2");