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/mod_devicetable.h>
  10 #include <linux/platform_device.h>
  11
  12 #include "clk-mtk.h"
  13 #include "clk-gate.h"
  14
  15 #include <dt-bindings/clock/mt7622-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_HSDMA_EN, "eth_hsdma_en", "eth_sel", 5),
  28         GATE_ETH(CLK_ETH_ESW_EN, "eth_esw_en", "eth_500m", 6),
  29         GATE_ETH(CLK_ETH_GP2_EN, "eth_gp2_en", "txclk_src_pre", 7),
  30         GATE_ETH(CLK_ETH_GP1_EN, "eth_gp1_en", "txclk_src_pre", 8),
  31         GATE_ETH(CLK_ETH_GP0_EN, "eth_gp0_en", "txclk_src_pre", 9),
  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[] = {
  44         GATE_SGMII(CLK_SGMII_TX250M_EN, "sgmii_tx250m_en",
  45                    "ssusb_tx250m", 2),
  46         GATE_SGMII(CLK_SGMII_RX250M_EN, "sgmii_rx250m_en",
  47                    "ssusb_eq_rx250m", 3),
  48         GATE_SGMII(CLK_SGMII_CDR_REF, "sgmii_cdr_ref",
  49                    "ssusb_cdr_ref", 4),
  50         GATE_SGMII(CLK_SGMII_CDR_FB, "sgmii_cdr_fb",
  51                    "ssusb_cdr_fb", 5),
  52 };
  53
  54 static u16 rst_ofs[] = { 0x34, };
  55
  56 static const struct mtk_clk_rst_desc clk_rst_desc = {
  57         .version = MTK_RST_SIMPLE,
  58         .rst_bank_ofs = rst_ofs,
  59         .rst_bank_nr = ARRAY_SIZE(rst_ofs),
  60 };
  61
  62 static const struct mtk_clk_desc eth_desc = {
  63         .clks = eth_clks,
  64         .num_clks = ARRAY_SIZE(eth_clks),
  65         .rst_desc = &clk_rst_desc,
  66 };
  67
  68 static const struct mtk_clk_desc sgmii_desc = {
  69         .clks = sgmii_clks,
  70         .num_clks = ARRAY_SIZE(sgmii_clks),
  71 };
  72
  73 static const struct of_device_id of_match_clk_mt7622_eth[] = {
  74         { .compatible = "mediatek,mt7622-ethsys", .data = &eth_desc },
  75         { .compatible = "mediatek,mt7622-sgmiisys", .data = &sgmii_desc },
  76         { /* sentinel */ }
  77 };
  78 MODULE_DEVICE_TABLE(of, of_match_clk_mt7622_eth);
  79
  80 static struct platform_driver clk_mt7622_eth_drv = {
  81         .probe = mtk_clk_simple_probe,
  82         .remove = mtk_clk_simple_remove,
  83         .driver = {
  84                 .name = "clk-mt7622-eth",
  85                 .of_match_table = of_match_clk_mt7622_eth,
  86         },
  87 };
  88 module_platform_driver(clk_mt7622_eth_drv);
  89
  90 MODULE_DESCRIPTION("MediaTek MT7622 Ethernet clocks driver");
  91 MODULE_LICENSE("GPL");