drivers/clk/mediatek/clk-mt8173-infracfg.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 MediaTek Inc.
   4  * Copyright (c) 2022 Collabora Ltd.
   5  * Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
   6  */
   7
   8 #include <dt-bindings/clock/mt8173-clk.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include "clk-cpumux.h"
  12 #include "clk-gate.h"
  13 #include "clk-mtk.h"
  14 #include "reset.h"
  15
  16 #define GATE_ICG(_id, _name, _parent, _shift)                   \
  17                 GATE_MTK(_id, _name, _parent, &infra_cg_regs,   \
  18                          _shift, &mtk_clk_gate_ops_setclr)
  19
  20 static struct clk_hw_onecell_data *infra_clk_data;
  21
  22 static const struct mtk_gate_regs infra_cg_regs = {
  23         .set_ofs = 0x0040,
  24         .clr_ofs = 0x0044,
  25         .sta_ofs = 0x0048,
  26 };
  27
  28 static const char * const ca53_parents[] __initconst = {
  29         "clk26m",
  30         "armca7pll",
  31         "mainpll",
  32         "univpll"
  33 };
  34
  35 static const char * const ca72_parents[] __initconst = {
  36         "clk26m",
  37         "armca15pll",
  38         "mainpll",
  39         "univpll"
  40 };
  41
  42 static const struct mtk_composite cpu_muxes[] = {
  43         MUX(CLK_INFRA_CA53SEL, "infra_ca53_sel", ca53_parents, 0x0000, 0, 2),
  44         MUX(CLK_INFRA_CA72SEL, "infra_ca72_sel", ca72_parents, 0x0000, 2, 2),
  45 };
  46
  47 static const struct mtk_fixed_factor infra_early_divs[] = {
  48         FACTOR(CLK_INFRA_CLK_13M, "clk13m", "clk26m", 1, 2),
  49 };
  50
  51 static const struct mtk_gate infra_gates[] = {
  52         GATE_ICG(CLK_INFRA_DBGCLK, "infra_dbgclk", "axi_sel", 0),
  53         GATE_ICG(CLK_INFRA_SMI, "infra_smi", "mm_sel", 1),
  54         GATE_ICG(CLK_INFRA_AUDIO, "infra_audio", "aud_intbus_sel", 5),
  55         GATE_ICG(CLK_INFRA_GCE, "infra_gce", "axi_sel", 6),
  56         GATE_ICG(CLK_INFRA_L2C_SRAM, "infra_l2c_sram", "axi_sel", 7),
  57         GATE_ICG(CLK_INFRA_M4U, "infra_m4u", "mem_sel", 8),
  58         GATE_ICG(CLK_INFRA_CPUM, "infra_cpum", "cpum_ck", 15),
  59         GATE_ICG(CLK_INFRA_KP, "infra_kp", "axi_sel", 16),
  60         GATE_ICG(CLK_INFRA_CEC, "infra_cec", "clk26m", 18),
  61         GATE_ICG(CLK_INFRA_PMICSPI, "infra_pmicspi", "pmicspi_sel", 22),
  62         GATE_ICG(CLK_INFRA_PMICWRAP, "infra_pmicwrap", "axi_sel", 23),
  63 };
  64
  65 static u16 infrasys_rst_ofs[] = { 0x30, 0x34 };
  66
  67 static const struct mtk_clk_rst_desc clk_rst_desc = {
  68         .version = MTK_RST_SIMPLE,
  69         .rst_bank_ofs = infrasys_rst_ofs,
  70         .rst_bank_nr = ARRAY_SIZE(infrasys_rst_ofs),
  71 };
  72
  73 static const struct of_device_id of_match_clk_mt8173_infracfg[] = {
  74         { .compatible = "mediatek,mt8173-infracfg" },
  75         { /* sentinel */ }
  76 };
  77 MODULE_DEVICE_TABLE(of, of_match_clk_mt8173_infracfg);
  78
  79 static void clk_mt8173_infra_init_early(struct device_node *node)
  80 {
  81         int i;
  82
  83         infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
  84         if (!infra_clk_data)
  85                 return;
  86
  87         for (i = 0; i < CLK_INFRA_NR_CLK; i++)
  88                 infra_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER);
  89
  90         mtk_clk_register_factors(infra_early_divs,
  91                                  ARRAY_SIZE(infra_early_divs), infra_clk_data);
  92
  93         of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data);
  94 }
  95 CLK_OF_DECLARE_DRIVER(mtk_infrasys, "mediatek,mt8173-infracfg",
  96                       clk_mt8173_infra_init_early);
  97
  98 static int clk_mt8173_infracfg_probe(struct platform_device *pdev)
  99 {
 100         struct device_node *node = pdev->dev.of_node;
 101         int r, i;
 102
 103         if (!infra_clk_data) {
 104                 infra_clk_data = mtk_alloc_clk_data(CLK_INFRA_NR_CLK);
 105                 if (!infra_clk_data)
 106                         return -ENOMEM;
 107         } else {
 108                 for (i = 0; i < CLK_INFRA_NR_CLK; i++)
 109                         if (infra_clk_data->hws[i] == ERR_PTR(-EPROBE_DEFER))
 110                                 infra_clk_data->hws[i] = ERR_PTR(-ENOENT);
 111         }
 112
 113         r = mtk_clk_register_gates(&pdev->dev, node, infra_gates,
 114                                    ARRAY_SIZE(infra_gates), infra_clk_data);
 115         if (r)
 116                 return r;
 117
 118         r = mtk_clk_register_cpumuxes(&pdev->dev, node, cpu_muxes,
 119                                       ARRAY_SIZE(cpu_muxes), infra_clk_data);
 120         if (r)
 121                 goto unregister_gates;
 122
 123         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, infra_clk_data);
 124         if (r)
 125                 goto unregister_cpumuxes;
 126
 127         r = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
 128         if (r)
 129                 goto unregister_clk_hw;
 130
 131         return 0;
 132
 133 unregister_clk_hw:
 134         of_clk_del_provider(node);
 135 unregister_cpumuxes:
 136         mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), infra_clk_data);
 137 unregister_gates:
 138         mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), infra_clk_data);
 139         return r;
 140 }
 141
 142 static void clk_mt8173_infracfg_remove(struct platform_device *pdev)
 143 {
 144         struct device_node *node = pdev->dev.of_node;
 145         struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
 146
 147         of_clk_del_provider(node);
 148         mtk_clk_unregister_cpumuxes(cpu_muxes, ARRAY_SIZE(cpu_muxes), clk_data);
 149         mtk_clk_unregister_gates(infra_gates, ARRAY_SIZE(infra_gates), clk_data);
 150         mtk_free_clk_data(clk_data);
 151 }
 152
 153 static struct platform_driver clk_mt8173_infracfg_drv = {
 154         .driver = {
 155                 .name = "clk-mt8173-infracfg",
 156                 .of_match_table = of_match_clk_mt8173_infracfg,
 157         },
 158         .probe = clk_mt8173_infracfg_probe,
 159         .remove = clk_mt8173_infracfg_remove,
 160 };
 161 module_platform_driver(clk_mt8173_infracfg_drv);
 162
 163 MODULE_DESCRIPTION("MediaTek MT8173 infracfg clocks driver");
 164 MODULE_LICENSE("GPL");