drivers/clk/mediatek/clk-mt7622-eth.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2017 MediaTek Inc.
   4  * Author: Chen Zhong <chen.zhong@mediatek.com>
   5  *         Sean Wang <sean.wang@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/mt7622-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_HSDMA_EN, "eth_hsdma_en", "eth_sel", 5),
  36         GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 6),
  37         GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
  38         GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
  39         GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
  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[] = {
  58         GATE_SGMII(CLK_SGMII_TX250M_EN, "sgmii_tx250m_en",
  59                    "ssusb_tx250m", 2),
  60         GATE_SGMII(CLK_SGMII_RX250M_EN, "sgmii_rx250m_en",
  61                    "ssusb_eq_rx250m", 3),
  62         GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
  63                    "ssusb_cdr_ref", 4),
  64         GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
  65                    "ssusb_cdr_fb", 5),
  66 };
  67
  68 static int clk_mt7622_ethsys_init(struct platform_device *pdev)
  69 {
  70         struct clk_onecell_data *clk_data;
  71         struct device_node *node = pdev->dev.of_node;
  72         int r;
  73
  74         clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
  75
  76         mtk_clk_register_gates(node, eth_clks, ARRAY_SIZE(eth_clks),
  77                                clk_data);
  78
  79         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  80         if (r)
  81                 dev_err(&pdev->dev,
  82                         "could not register clock provider: %s: %d\n",
  83                         pdev->name, r);
  84
  85         mtk_register_reset_controller(node, 1, 0x34);
  86
  87         return r;
  88 }
  89
  90 static int clk_mt7622_sgmiisys_init(struct platform_device *pdev)
  91 {
  92         struct clk_onecell_data *clk_data;
  93         struct device_node *node = pdev->dev.of_node;
  94         int r;
  95
  96         clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
  97
  98         mtk_clk_register_gates(node, sgmii_clks, ARRAY_SIZE(sgmii_clks),
  99                                clk_data);
 100
 101         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 102         if (r)
 103                 dev_err(&pdev->dev,
 104                         "could not register clock provider: %s: %d\n",
 105                         pdev->name, r);
 106
 107         return r;
 108 }
 109
 110 static const struct of_device_id of_match_clk_mt7622_eth[] = {
 111         {
 112                 .compatible = "mediatek,mt7622-ethsys",
 113                 .data = clk_mt7622_ethsys_init,
 114         }, {
 115                 .compatible = "mediatek,mt7622-sgmiisys",
 116                 .data = clk_mt7622_sgmiisys_init,
 117         }, {
 118                 /* sentinel */
 119         }
 120 };
 121
 122 static int clk_mt7622_eth_probe(struct platform_device *pdev)
 123 {
 124         int (*clk_init)(struct platform_device *);
 125         int r;
 126
 127         clk_init = of_device_get_match_data(&pdev->dev);
 128         if (!clk_init)
 129                 return -EINVAL;
 130
 131         r = clk_init(pdev);
 132         if (r)
 133                 dev_err(&pdev->dev,
 134                         "could not register clock provider: %s: %d\n",
 135                         pdev->name, r);
 136
 137         return r;
 138 }
 139
 140 static struct platform_driver clk_mt7622_eth_drv = {
 141         .probe = clk_mt7622_eth_probe,
 142         .driver = {
 143                 .name = "clk-mt7622-eth",
 144                 .of_match_table = of_match_clk_mt7622_eth,
 145         },
 146 };
 147
 148 builtin_platform_driver(clk_mt7622_eth_drv);