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/platform_device.h>
  11
  12 #include "clk-mtk.h"
  13 #include "clk-gate.h"
  14
  15 #include <dt-bindings/clock/mt7629-clk.h>
  16
  17 #define GATE_ETH(_id, _name, _parent, _shift)                   \
  18         GATE_MTK(_id, _name, _parent, &eth_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
  19
  20 static const struct mtk_gate_regs eth_cg_regs = {
  21         .set_ofs = 0x30,
  22         .clr_ofs = 0x30,
  23         .sta_ofs = 0x30,
  24 };
  25
  26 static const struct mtk_gate eth_clks[] = {
  27         GATE_ETH(CLK_ETH_FE_EN, "eth_fe_en", "eth2pll", 6),
  28         GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
  29         GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
  30         GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
  31         GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 16),
  32 };
  33
  34 static const struct mtk_gate_regs sgmii_cg_regs = {
  35         .set_ofs = 0xE4,
  36         .clr_ofs = 0xE4,
  37         .sta_ofs = 0xE4,
  38 };
  39
  40 #define GATE_SGMII(_id, _name, _parent, _shift)                 \
  41         GATE_MTK(_id, _name, _parent, &sgmii_cg_regs, _shift, &mtk_clk_gate_ops_no_setclr_inv)
  42
  43 static const struct mtk_gate sgmii_clks[2][4] = {
  44         {
  45                 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en",
  46                            "ssusb_tx250m", 2),
  47                 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en",
  48                            "ssusb_eq_rx250m", 3),
  49                 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
  50                            "ssusb_cdr_ref", 4),
  51                 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
  52                            "ssusb_cdr_fb", 5),
  53         }, {
  54                 GATE_SGMII(CLK_SGMII_TX_EN, "sgmii_tx_en1",
  55                            "ssusb_tx250m", 2),
  56                 GATE_SGMII(CLK_SGMII_RX_EN, "sgmii_rx_en1",
  57                            "ssusb_eq_rx250m", 3),
  58                 GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref1",
  59                            "ssusb_cdr_ref", 4),
  60                 GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb1",
  61                            "ssusb_cdr_fb", 5),
  62         }
  63 };
  64
  65 static u16 rst_ofs[] = { 0x34, };
  66
  67 static const struct mtk_clk_rst_desc clk_rst_desc = {
  68         .version = MTK_RST_SIMPLE,
  69         .rst_bank_ofs = rst_ofs,
  70         .rst_bank_nr = ARRAY_SIZE(rst_ofs),
  71 };
  72
  73 static int clk_mt7629_ethsys_init(struct platform_device *pdev)
  74 {
  75         struct clk_hw_onecell_data *clk_data;
  76         struct device_node *node = pdev->dev.of_node;
  77         int r;
  78
  79         clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
  80         if (!clk_data)
  81                 return -ENOMEM;
  82
  83         mtk_clk_register_gates(&pdev->dev, node, eth_clks,
  84                                CLK_ETH_NR_CLK, clk_data);
  85
  86         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
  87         if (r)
  88                 dev_err(&pdev->dev,
  89                         "could not register clock provider: %s: %d\n",
  90                         pdev->name, r);
  91
  92         mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
  93
  94         return r;
  95 }
  96
  97 static int clk_mt7629_sgmiisys_init(struct platform_device *pdev)
  98 {
  99         struct clk_hw_onecell_data *clk_data;
 100         struct device_node *node = pdev->dev.of_node;
 101         static int id;
 102         int r;
 103
 104         clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
 105         if (!clk_data)
 106                 return -ENOMEM;
 107
 108         mtk_clk_register_gates(&pdev->dev, node, sgmii_clks[id++],
 109                                CLK_SGMII_NR_CLK, clk_data);
 110
 111         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 112         if (r)
 113                 dev_err(&pdev->dev,
 114                         "could not register clock provider: %s: %d\n",
 115                         pdev->name, r);
 116
 117         return r;
 118 }
 119
 120 static const struct of_device_id of_match_clk_mt7629_eth[] = {
 121         {
 122                 .compatible = "mediatek,mt7629-ethsys",
 123                 .data = clk_mt7629_ethsys_init,
 124         }, {
 125                 .compatible = "mediatek,mt7629-sgmiisys",
 126                 .data = clk_mt7629_sgmiisys_init,
 127         }, {
 128                 /* sentinel */
 129         }
 130 };
 131 MODULE_DEVICE_TABLE(of, of_match_clk_mt7629_eth);
 132
 133 static int clk_mt7629_eth_probe(struct platform_device *pdev)
 134 {
 135         int (*clk_init)(struct platform_device *);
 136         int r;
 137
 138         clk_init = of_device_get_match_data(&pdev->dev);
 139         if (!clk_init)
 140                 return -EINVAL;
 141
 142         r = clk_init(pdev);
 143         if (r)
 144                 dev_err(&pdev->dev,
 145                         "could not register clock provider: %s: %d\n",
 146                         pdev->name, r);
 147
 148         return r;
 149 }
 150
 151 static struct platform_driver clk_mt7629_eth_drv = {
 152         .probe = clk_mt7629_eth_probe,
 153         .driver = {
 154                 .name = "clk-mt7629-eth",
 155                 .of_match_table = of_match_clk_mt7629_eth,
 156         },
 157 };
 158
 159 builtin_platform_driver(clk_mt7629_eth_drv);
 160
 161 MODULE_DESCRIPTION("MediaTek MT7629 Ethernet clocks driver");
 162 MODULE_LICENSE("GPL");