drivers/clk/mediatek/clk-mt7629-hif.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2018 MediaTek Inc.
   4  * Author: Wenzhen Yu <Wenzhen [email protected]>
   5  *         Ryder Lee <[email protected]>
   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_PCIE(_id, _name, _parent, _shift) {        \
  20                 .id = _id,                              \
  21                 .name = _name,                          \
  22                 .parent_name = _parent,                 \
  23                 .regs = &pcie_cg_regs,                  \
  24                 .shift = _shift,                        \
  25                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  26         }
  27
  28 #define GATE_SSUSB(_id, _name, _parent, _shift) {       \
  29                 .id = _id,                              \
  30                 .name = _name,                          \
  31                 .parent_name = _parent,                 \
  32                 .regs = &ssusb_cg_regs,                 \
  33                 .shift = _shift,                        \
  34                 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
  35         }
  36
  37 static const struct mtk_gate_regs pcie_cg_regs = {
  38         .set_ofs = 0x30,
  39         .clr_ofs = 0x30,
  40         .sta_ofs = 0x30,
  41 };
  42
  43 static const struct mtk_gate_regs ssusb_cg_regs = {
  44         .set_ofs = 0x30,
  45         .clr_ofs = 0x30,
  46         .sta_ofs = 0x30,
  47 };
  48
  49 static const struct mtk_gate ssusb_clks[] = {
  50         GATE_SSUSB(CLK_SSUSB_U2_PHY_1P_EN, "ssusb_u2_phy_1p",
  51                    "to_u2_phy_1p", 0),
  52         GATE_SSUSB(CLK_SSUSB_U2_PHY_EN, "ssusb_u2_phy_en", "to_u2_phy", 1),
  53         GATE_SSUSB(CLK_SSUSB_REF_EN, "ssusb_ref_en", "to_usb3_ref", 5),
  54         GATE_SSUSB(CLK_SSUSB_SYS_EN, "ssusb_sys_en", "to_usb3_sys", 6),
  55         GATE_SSUSB(CLK_SSUSB_MCU_EN, "ssusb_mcu_en", "to_usb3_mcu", 7),
  56         GATE_SSUSB(CLK_SSUSB_DMA_EN, "ssusb_dma_en", "to_usb3_dma", 8),
  57 };
  58
  59 static const struct mtk_gate pcie_clks[] = {
  60         GATE_PCIE(CLK_PCIE_P1_AUX_EN, "pcie_p1_aux_en", "p1_1mhz", 12),
  61         GATE_PCIE(CLK_PCIE_P1_OBFF_EN, "pcie_p1_obff_en", "free_run_4mhz", 13),
  62         GATE_PCIE(CLK_PCIE_P1_AHB_EN, "pcie_p1_ahb_en", "from_top_ahb", 14),
  63         GATE_PCIE(CLK_PCIE_P1_AXI_EN, "pcie_p1_axi_en", "from_top_axi", 15),
  64         GATE_PCIE(CLK_PCIE_P1_MAC_EN, "pcie_p1_mac_en", "pcie1_mac_en", 16),
  65         GATE_PCIE(CLK_PCIE_P1_PIPE_EN, "pcie_p1_pipe_en", "pcie1_pipe_en", 17),
  66         GATE_PCIE(CLK_PCIE_P0_AUX_EN, "pcie_p0_aux_en", "p0_1mhz", 18),
  67         GATE_PCIE(CLK_PCIE_P0_OBFF_EN, "pcie_p0_obff_en", "free_run_4mhz", 19),
  68         GATE_PCIE(CLK_PCIE_P0_AHB_EN, "pcie_p0_ahb_en", "from_top_ahb", 20),
  69         GATE_PCIE(CLK_PCIE_P0_AXI_EN, "pcie_p0_axi_en", "from_top_axi", 21),
  70         GATE_PCIE(CLK_PCIE_P0_MAC_EN, "pcie_p0_mac_en", "pcie0_mac_en", 22),
  71         GATE_PCIE(CLK_PCIE_P0_PIPE_EN, "pcie_p0_pipe_en", "pcie0_pipe_en", 23),
  72 };
  73
  74 static u16 rst_ofs[] = { 0x34, };
  75
  76 static const struct mtk_clk_rst_desc clk_rst_desc = {
  77         .version = MTK_RST_SIMPLE,
  78         .rst_bank_ofs = rst_ofs,
  79         .rst_bank_nr = ARRAY_SIZE(rst_ofs),
  80 };
  81
  82 static int clk_mt7629_ssusbsys_init(struct platform_device *pdev)
  83 {
  84         struct clk_hw_onecell_data *clk_data;
  85         struct device_node *node = pdev->dev.of_node;
  86         int r;
  87
  88         clk_data = mtk_alloc_clk_data(CLK_SSUSB_NR_CLK);
  89
  90         mtk_clk_register_gates(node, ssusb_clks, ARRAY_SIZE(ssusb_clks),
  91                                clk_data);
  92
  93         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
  94         if (r)
  95                 dev_err(&pdev->dev,
  96                         "could not register clock provider: %s: %d\n",
  97                         pdev->name, r);
  98
  99         mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
 100
 101         return r;
 102 }
 103
 104 static int clk_mt7629_pciesys_init(struct platform_device *pdev)
 105 {
 106         struct clk_hw_onecell_data *clk_data;
 107         struct device_node *node = pdev->dev.of_node;
 108         int r;
 109
 110         clk_data = mtk_alloc_clk_data(CLK_PCIE_NR_CLK);
 111
 112         mtk_clk_register_gates(node, pcie_clks, ARRAY_SIZE(pcie_clks),
 113                                clk_data);
 114
 115         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 116         if (r)
 117                 dev_err(&pdev->dev,
 118                         "could not register clock provider: %s: %d\n",
 119                         pdev->name, r);
 120
 121         mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
 122
 123         return r;
 124 }
 125
 126 static const struct of_device_id of_match_clk_mt7629_hif[] = {
 127         {
 128                 .compatible = "mediatek,mt7629-pciesys",
 129                 .data = clk_mt7629_pciesys_init,
 130         }, {
 131                 .compatible = "mediatek,mt7629-ssusbsys",
 132                 .data = clk_mt7629_ssusbsys_init,
 133         }, {
 134                 /* sentinel */
 135         }
 136 };
 137
 138 static int clk_mt7629_hif_probe(struct platform_device *pdev)
 139 {
 140         int (*clk_init)(struct platform_device *);
 141         int r;
 142
 143         clk_init = of_device_get_match_data(&pdev->dev);
 144         if (!clk_init)
 145                 return -EINVAL;
 146
 147         r = clk_init(pdev);
 148         if (r)
 149                 dev_err(&pdev->dev,
 150                         "could not register clock provider: %s: %d\n",
 151                         pdev->name, r);
 152
 153         return r;
 154 }
 155
 156 static struct platform_driver clk_mt7629_hif_drv = {
 157         .probe = clk_mt7629_hif_probe,
 158         .driver = {
 159                 .name = "clk-mt7629-hif",
 160                 .of_match_table = of_match_clk_mt7629_hif,
 161         },
 162 };
 163
 164 builtin_platform_driver(clk_mt7629_hif_drv);