drivers/clk/mediatek/clk-mt8167-apmixedsys.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2020 MediaTek Inc.
   4  * Copyright (c) 2020 BayLibre, SAS
   5  * Copyright (c) 2023 Collabora, Ltd.
   6  */
   7
   8 #include <dt-bindings/clock/mt8167-clk.h>
   9 #include <linux/clk.h>
  10 #include <linux/of.h>
  11 #include <linux/platform_device.h>
  12
  13 #include "clk-pll.h"
  14 #include "clk-mtk.h"
  15
  16 static DEFINE_SPINLOCK(mt8167_apmixed_clk_lock);
  17
  18 #define MT8167_PLL_FMAX         (2500UL * MHZ)
  19
  20 #define CON0_MT8167_RST_BAR     BIT(27)
  21
  22 #define PLL_B(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits,   \
  23                         _pd_reg, _pd_shift, _tuner_reg, _pcw_reg,       \
  24                         _pcw_shift, _div_table) {                       \
  25                 .id = _id,                                              \
  26                 .name = _name,                                          \
  27                 .reg = _reg,                                            \
  28                 .pwr_reg = _pwr_reg,                                    \
  29                 .en_mask = _en_mask,                                    \
  30                 .flags = _flags,                                        \
  31                 .rst_bar_mask = CON0_MT8167_RST_BAR,                    \
  32                 .fmax = MT8167_PLL_FMAX,                                \
  33                 .pcwbits = _pcwbits,                                    \
  34                 .pd_reg = _pd_reg,                                      \
  35                 .pd_shift = _pd_shift,                                  \
  36                 .tuner_reg = _tuner_reg,                                \
  37                 .pcw_reg = _pcw_reg,                                    \
  38                 .pcw_shift = _pcw_shift,                                \
  39                 .div_table = _div_table,                                \
  40         }
  41
  42 #define PLL(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits,     \
  43                         _pd_reg, _pd_shift, _tuner_reg, _pcw_reg,       \
  44                         _pcw_shift)                                     \
  45                 PLL_B(_id, _name, _reg, _pwr_reg, _en_mask, _flags, _pcwbits, \
  46                         _pd_reg, _pd_shift, _tuner_reg, _pcw_reg, _pcw_shift, \
  47                         NULL)
  48
  49 static const struct mtk_pll_div_table mmpll_div_table[] = {
  50         { .div = 0, .freq = MT8167_PLL_FMAX },
  51         { .div = 1, .freq = 1000000000 },
  52         { .div = 2, .freq = 604500000 },
  53         { .div = 3, .freq = 253500000 },
  54         { .div = 4, .freq = 126750000 },
  55         { /* sentinel */ }
  56 };
  57
  58 static const struct mtk_pll_data plls[] = {
  59         PLL(CLK_APMIXED_ARMPLL, "armpll", 0x0100, 0x0110, 0, 0,
  60             21, 0x0104, 24, 0, 0x0104, 0),
  61         PLL(CLK_APMIXED_MAINPLL, "mainpll", 0x0120, 0x0130, 0,
  62             HAVE_RST_BAR, 21, 0x0124, 24, 0, 0x0124, 0),
  63         PLL(CLK_APMIXED_UNIVPLL, "univpll", 0x0140, 0x0150, 0x30000000,
  64             HAVE_RST_BAR, 7, 0x0144, 24, 0, 0x0144, 0),
  65         PLL_B(CLK_APMIXED_MMPLL, "mmpll", 0x0160, 0x0170, 0, 0,
  66               21, 0x0164, 24, 0, 0x0164, 0, mmpll_div_table),
  67         PLL(CLK_APMIXED_APLL1, "apll1", 0x0180, 0x0190, 0, 0,
  68             31, 0x0180, 1, 0x0194, 0x0184, 0),
  69         PLL(CLK_APMIXED_APLL2, "apll2", 0x01A0, 0x01B0, 0, 0,
  70             31, 0x01A0, 1, 0x01B4, 0x01A4, 0),
  71         PLL(CLK_APMIXED_TVDPLL, "tvdpll", 0x01C0, 0x01D0, 0, 0,
  72             21, 0x01C4, 24, 0, 0x01C4, 0),
  73         PLL(CLK_APMIXED_LVDSPLL, "lvdspll", 0x01E0, 0x01F0, 0, 0,
  74             21, 0x01E4, 24, 0, 0x01E4, 0),
  75 };
  76
  77 #define DIV_ADJ_FLAG(_id, _name, _parent, _reg, _shift, _width, _flag) { \
  78                 .id = _id,                                      \
  79                 .name = _name,                                  \
  80                 .parent_name = _parent,                         \
  81                 .div_reg = _reg,                                \
  82                 .div_shift = _shift,                            \
  83                 .div_width = _width,                            \
  84                 .clk_divider_flags = _flag,                     \
  85 }
  86
  87 static const struct mtk_clk_divider adj_divs[] = {
  88         DIV_ADJ_FLAG(CLK_APMIXED_HDMI_REF, "hdmi_ref", "tvdpll",
  89                      0x1c4, 24, 3, CLK_DIVIDER_POWER_OF_TWO),
  90 };
  91
  92 static int clk_mt8167_apmixed_probe(struct platform_device *pdev)
  93 {
  94         void __iomem *base;
  95         struct clk_hw_onecell_data *clk_data;
  96         struct device_node *node = pdev->dev.of_node;
  97         struct device *dev = &pdev->dev;
  98         int ret;
  99
 100         base = devm_platform_ioremap_resource(pdev, 0);
 101         if (IS_ERR(base))
 102                 return PTR_ERR(base);
 103
 104         clk_data = mtk_devm_alloc_clk_data(dev, MT8167_CLK_APMIXED_NR_CLK);
 105         if (!clk_data)
 106                 return -ENOMEM;
 107
 108         ret = mtk_clk_register_plls(node, plls, ARRAY_SIZE(plls), clk_data);
 109         if (ret)
 110                 return ret;
 111
 112         ret = mtk_clk_register_dividers(dev, adj_divs, ARRAY_SIZE(adj_divs), base,
 113                                         &mt8167_apmixed_clk_lock, clk_data);
 114         if (ret)
 115                 goto unregister_plls;
 116
 117         ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 118         if (ret)
 119                 goto unregister_dividers;
 120
 121         return 0;
 122
 123 unregister_dividers:
 124         mtk_clk_unregister_dividers(adj_divs, ARRAY_SIZE(adj_divs), clk_data);
 125 unregister_plls:
 126         mtk_clk_unregister_plls(plls, ARRAY_SIZE(plls), clk_data);
 127
 128         return ret;
 129 }
 130
 131 static const struct of_device_id of_match_clk_mt8167_apmixed[] = {
 132         { .compatible = "mediatek,mt8167-apmixedsys" },
 133         { /* sentinel */ }
 134 };
 135 MODULE_DEVICE_TABLE(of, of_match_clk_mt8167_apmixed);
 136
 137 static struct platform_driver clk_mt8167_apmixed_drv = {
 138         .probe = clk_mt8167_apmixed_probe,
 139         .driver = {
 140                 .name = "clk-mt8167-apmixed",
 141                 .of_match_table = of_match_clk_mt8167_apmixed,
 142         },
 143 };
 144 builtin_platform_driver(clk_mt8167_apmixed_drv)
 145 MODULE_LICENSE("GPL");