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

   1 /*
   2  * Copyright (c) 2017 MediaTek Inc.
   3  * Author: Chen Zhong <chen.zhong@mediatek.com>
   4  *         Sean Wang <sean.wang@mediatek.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/clk-provider.h>
  17 #include <linux/of.h>
  18 #include <linux/of_address.h>
  19 #include <linux/of_device.h>
  20 #include <linux/platform_device.h>
  21
  22 #include "clk-mtk.h"
  23 #include "clk-gate.h"
  24
  25 #include <dt-bindings/clock/mt7622-clk.h>
  26
  27 #define GATE_ETH(_id, _name, _parent, _shift) { \
  28                 .id = _id,                              \
  29                 .name = _name,                          \
  30                 .parent_name = _parent,                 \
  31                 .regs = &eth_cg_regs,                   \
  32                 .shift = _shift,                        \
  33                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  34         }
  35
  36 static const struct mtk_gate_regs eth_cg_regs = {
  37         .set_ofs = 0x30,
  38         .clr_ofs = 0x30,
  39         .sta_ofs = 0x30,
  40 };
  41
  42 static const struct mtk_gate eth_clks[] = {
  43         GATE_ETH(CLK_ETH_HSDMA_EN, "eth_hsdma_en", "eth_sel", 5),
  44         GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 6),
  45         GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
  46         GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
  47         GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
  48 };
  49
  50 static const struct mtk_gate_regs sgmii_cg_regs = {
  51         .set_ofs = 0xE4,
  52         .clr_ofs = 0xE4,
  53         .sta_ofs = 0xE4,
  54 };
  55
  56 #define GATE_SGMII(_id, _name, _parent, _shift) {       \
  57                 .id = _id,                              \
  58                 .name = _name,                          \
  59                 .parent_name = _parent,                 \
  60                 .regs = &sgmii_cg_regs,                 \
  61                 .shift = _shift,                        \
  62                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  63         }
  64
  65 static const struct mtk_gate sgmii_clks[] = {
  66         GATE_SGMII(CLK_SGMII_TX250M_EN, "sgmii_tx250m_en",
  67                    "ssusb_tx250m", 2),
  68         GATE_SGMII(CLK_SGMII_RX250M_EN, "sgmii_rx250m_en",
  69                    "ssusb_eq_rx250m", 3),
  70         GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
  71                    "ssusb_cdr_ref", 4),
  72         GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
  73                    "ssusb_cdr_fb", 5),
  74 };
  75
  76 static int clk_mt7622_ethsys_init(struct platform_device *pdev)
  77 {
  78         struct clk_onecell_data *clk_data;
  79         struct device_node *node = pdev->dev.of_node;
  80         int r;
  81
  82         clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK);
  83
  84         mtk_clk_register_gates(node, eth_clks, ARRAY_SIZE(eth_clks),
  85                                clk_data);
  86
  87         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
  88         if (r)
  89                 dev_err(&pdev->dev,
  90                         "could not register clock provider: %s: %d\n",
  91                         pdev->name, r);
  92
  93         mtk_register_reset_controller(node, 1, 0x34);
  94
  95         return r;
  96 }
  97
  98 static int clk_mt7622_sgmiisys_init(struct platform_device *pdev)
  99 {
 100         struct clk_onecell_data *clk_data;
 101         struct device_node *node = pdev->dev.of_node;
 102         int r;
 103
 104         clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK);
 105
 106         mtk_clk_register_gates(node, sgmii_clks, ARRAY_SIZE(sgmii_clks),
 107                                clk_data);
 108
 109         r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 110         if (r)
 111                 dev_err(&pdev->dev,
 112                         "could not register clock provider: %s: %d\n",
 113                         pdev->name, r);
 114
 115         return r;
 116 }
 117
 118 static const struct of_device_id of_match_clk_mt7622_eth[] = {
 119         {
 120                 .compatible = "mediatek,mt7622-ethsys",
 121                 .data = clk_mt7622_ethsys_init,
 122         }, {
 123                 .compatible = "mediatek,mt7622-sgmiisys",
 124                 .data = clk_mt7622_sgmiisys_init,
 125         }, {
 126                 /* sentinel */
 127         }
 128 };
 129
 130 static int clk_mt7622_eth_probe(struct platform_device *pdev)
 131 {
 132         int (*clk_init)(struct platform_device *);
 133         int r;
 134
 135         clk_init = of_device_get_match_data(&pdev->dev);
 136         if (!clk_init)
 137                 return -EINVAL;
 138
 139         r = clk_init(pdev);
 140         if (r)
 141                 dev_err(&pdev->dev,
 142                         "could not register clock provider: %s: %d\n",
 143                         pdev->name, r);
 144
 145         return r;
 146 }
 147
 148 static struct platform_driver clk_mt7622_eth_drv = {
 149         .probe = clk_mt7622_eth_probe,
 150         .driver = {
 151                 .name = "clk-mt7622-eth",
 152                 .of_match_table = of_match_clk_mt7622_eth,
 153         },
 154 };
 155
 156 builtin_platform_driver(clk_mt7622_eth_drv);