drivers/clk/mediatek/clk-mt7629-eth.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2018 MediaTek Inc.
   4  * Author: Wenzhen Yu <Wenzhen Yu@mediatek.com>
   5  *         Ryder Lee <ryder.lee@mediatek.com>
   6  */
   7
   8 #include <linux/clk-provider.h>
   9 #include <linux/of.h>
  10 #include <linux/of_address.h>
  11 #include <linux/of_device.h>
  12 #include <linux/platform_device.h>
  13
  14 #include "clk-mtk.h"
  15 #include "clk-gate.h"
  16
  17 #include <dt-bindings/clock/mt7629-clk.h>
  18
  19 #define GATE_ETH(_id, _name, _parent, _shift) {         \
  20                 .id = _id,                              \
  21                 .name = _name,                          \
  22                 .parent_name = _parent,                 \
  23                 .regs = &eth_cg_regs,                   \
  24                 .shift = _shift,                        \
  25                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  26         }
  27
  28 static const struct mtk_gate_regs eth_cg_regs = {
  29         .set_ofs = 0x30,
  30         .clr_ofs = 0x30,
  31         .sta_ofs = 0x30,
  32 };
  33
  34 static const struct mtk_gate eth_clks[] = {
  35         GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "eth2pll", 6),
  36         GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
  37         GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
  38         GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
  39         GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 16),
  40 };
  41
  42 static const struct mtk_gate_regs sgmii_cg_regs = {
  43         .set_ofs = 0xE4,
  44         .clr_ofs = 0xE4,
  45         .sta_ofs = 0xE4,
  46 };
  47
  48 #define GATE_SGMII(_id, _name, _parent, _shift) {       \
  49                 .id = _id,                              \
  50                 .name = _name,                          \
  51                 .parent_name = _parent,                 \
  52                 .regs = &sgmii_cg_regs,                 \
  53                 .shift = _shift,                        \
  54                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  55         }
  56
  57 static const struct mtk_gate sgmii_clks[2][4] = {
  58         {
  59                 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en",
  60                            "ssusb_tx250m", 2),
  61                 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en",
  62                            "ssusb_eq_rx250m", 3),
  63                 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
  64                            "ssusb_cdr_ref", 4),
  65                 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
  66                            "ssusb_cdr_fb", 5),
  67         }, {
  68                 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en1",
  69                            "ssusb_tx250m", 2),
  70                 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en1",
  71                            "ssusb_eq_rx250m", 3),
  72                 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref1",
  73                            "ssusb_cdr_ref", 4),
  74                 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb1",
  75                            "ssusb_cdr_fb", 5),
  76         }
  77 };
  78
  79 static int clk_mt7629_ethsys_init(struct platform_device *pdev)
  80 {
  81         struct clk_onecell_data *clk_data;
  82         struct device_node *node = pdev->dev.of_node;
  83         int r;
  84
  85         clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
  86         if (!clk_data)
  87                 return -ENOMEM;
  88
  89         mtk_clk_register_gates(node, eth_clks, CLK_ETH_NR_CLK, clk_data);
  90
  91         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  92         if (r)
  93                 dev_err(&pdev->dev,
  94                         "could not register clock provider: %s: %d\n",
  95                         pdev->name, r);
  96
  97         mtk_register_reset_controller(node, 1, 0x34);
  98
  99         return r;
 100 }
 101
 102 static int clk_mt7629_sgmiisys_init(struct platform_device *pdev)
 103 {
 104         struct clk_onecell_data *clk_data;
 105         struct device_node *node = pdev->dev.of_node;
 106         static int id;
 107         int r;
 108
 109         clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
 110         if (!clk_data)
 111                 return -ENOMEM;
 112
 113         mtk_clk_register_gates(node, sgmii_clks[id++], CLK_SGMII_NR_CLK,
 114                                clk_data);
 115
 116         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 117         if (r)
 118                 dev_err(&pdev->dev,
 119                         "could not register clock provider: %s: %d\n",
 120                         pdev->name, r);
 121
 122         return r;
 123 }
 124
 125 static const struct of_device_id of_match_clk_mt7629_eth[] = {
 126         {
 127                 .compatible = "mediatek,mt7629-ethsys",
 128                 .data = clk_mt7629_ethsys_init,
 129         }, {
 130                 .compatible = "mediatek,mt7629-sgmiisys",
 131                 .data = clk_mt7629_sgmiisys_init,
 132         }, {
 133                 /* sentinel */
 134         }
 135 };
 136
 137 static int clk_mt7629_eth_probe(struct platform_device *pdev)
 138 {
 139         int (*clk_init)(struct platform_device *);
 140         int r;
 141
 142         clk_init = of_device_get_match_data(&pdev->dev);
 143         if (!clk_init)
 144                 return -EINVAL;
 145
 146         r = clk_init(pdev);
 147         if (r)
 148                 dev_err(&pdev->dev,
 149                         "could not register clock provider: %s: %d\n",
 150                         pdev->name, r);
 151
 152         return r;
 153 }
 154
 155 static struct platform_driver clk_mt7629_eth_drv = {
 156         .probe = clk_mt7629_eth_probe,
 157         .driver = {
 158                 .name = "clk-mt7629-eth",
 159                 .of_match_table = of_match_clk_mt7629_eth,
 160         },
 161 };
 162
 163 builtin_platform_driver(clk_mt7629_eth_drv);