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 = ð_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 u16 rst_ofs[] = { 0x34, }; 80 81 static const struct mtk_clk_rst_desc clk_rst_desc = { 82 .version = MTK_RST_SIMPLE, 83 .rst_bank_ofs = rst_ofs, 84 .rst_bank_nr = ARRAY_SIZE(rst_ofs), 85 }; 86 87 static int clk_mt7629_ethsys_init(struct platform_device *pdev) 88 { 89 struct clk_hw_onecell_data *clk_data; 90 struct device_node *node = pdev->dev.of_node; 91 int r; 92 93 clk_data = mtk_alloc_clk_data(CLK_ETH_NR_CLK); 94 95 mtk_clk_register_gates(node, eth_clks, CLK_ETH_NR_CLK, clk_data); 96 97 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data); 98 if (r) 99 dev_err(&pdev->dev, 100 "could not register clock provider: %s: %d\n", 101 pdev->name, r); 102 103 mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc); 104 105 return r; 106 } 107 108 static int clk_mt7629_sgmiisys_init(struct platform_device *pdev) 109 { 110 struct clk_hw_onecell_data *clk_data; 111 struct device_node *node = pdev->dev.of_node; 112 static int id; 113 int r; 114 115 clk_data = mtk_alloc_clk_data(CLK_SGMII_NR_CLK); 116 117 mtk_clk_register_gates(node, sgmii_clks[id++], CLK_SGMII_NR_CLK, 118 clk_data); 119 120 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data); 121 if (r) 122 dev_err(&pdev->dev, 123 "could not register clock provider: %s: %d\n", 124 pdev->name, r); 125 126 return r; 127 } 128 129 static const struct of_device_id of_match_clk_mt7629_eth[] = { 130 { 131 .compatible = "mediatek,mt7629-ethsys", 132 .data = clk_mt7629_ethsys_init, 133 }, { 134 .compatible = "mediatek,mt7629-sgmiisys", 135 .data = clk_mt7629_sgmiisys_init, 136 }, { 137 /* sentinel */ 138 } 139 }; 140 141 static int clk_mt7629_eth_probe(struct platform_device *pdev) 142 { 143 int (*clk_init)(struct platform_device *); 144 int r; 145 146 clk_init = of_device_get_match_data(&pdev->dev); 147 if (!clk_init) 148 return -EINVAL; 149 150 r = clk_init(pdev); 151 if (r) 152 dev_err(&pdev->dev, 153 "could not register clock provider: %s: %d\n", 154 pdev->name, r); 155 156 return r; 157 } 158 159 static struct platform_driver clk_mt7629_eth_drv = { 160 .probe = clk_mt7629_eth_probe, 161 .driver = { 162 .name = "clk-mt7629-eth", 163 .of_match_table = of_match_clk_mt7629_eth, 164 }, 165 }; 166 167 builtin_platform_driver(clk_mt7629_eth_drv); 168