1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2014 MediaTek Inc.
4 * Author: Shunli Wang <shunli.wang@mediatek.com>
5 */
6
7 #include <linux/clk-provider.h>
8 #include <linux/platform_device.h>
9
10 #include "clk-mtk.h"
11 #include "clk-gate.h"
12
13 #include <dt-bindings/clock/mt2701-clk.h>
14
15 static const struct mtk_gate_regs hif_cg_regs = {
16 .sta_ofs = 0x0030,
17 };
18
19 #define GATE_HIF(_id, _name, _parent, _shift) { \
20 .id = _id, \
21 .name = _name, \
22 .parent_name = _parent, \
23 .regs = &hif_cg_regs, \
24 .shift = _shift, \
25 .ops = &mtk_clk_gate_ops_no_setclr_inv, \
26 }
27
28 static const struct mtk_gate hif_clks[] = {
29 GATE_HIF(CLK_HIFSYS_USB0PHY, "usb0_phy_clk", "ethpll_500m_ck", 21),
30 GATE_HIF(CLK_HIFSYS_USB1PHY, "usb1_phy_clk", "ethpll_500m_ck", 22),
31 GATE_HIF(CLK_HIFSYS_PCIE0, "pcie0_clk", "ethpll_500m_ck", 24),
32 GATE_HIF(CLK_HIFSYS_PCIE1, "pcie1_clk", "ethpll_500m_ck", 25),
33 GATE_HIF(CLK_HIFSYS_PCIE2, "pcie2_clk", "ethpll_500m_ck", 26),
34 };
35
36 static u16 rst_ofs[] = { 0x34, };
37
38 static const struct mtk_clk_rst_desc clk_rst_desc = {
39 .version = MTK_RST_SIMPLE,
40 .rst_bank_ofs = rst_ofs,
41 .rst_bank_nr = ARRAY_SIZE(rst_ofs),
42 };
43
44 static const struct of_device_id of_match_clk_mt2701_hif[] = {
45 { .compatible = "mediatek,mt2701-hifsys", },
46 {}
47 };
48
clk_mt2701_hif_probe(struct platform_device * pdev)49 static int clk_mt2701_hif_probe(struct platform_device *pdev)
50 {
51 struct clk_hw_onecell_data *clk_data;
52 int r;
53 struct device_node *node = pdev->dev.of_node;
54
55 clk_data = mtk_alloc_clk_data(CLK_HIFSYS_NR);
56
57 mtk_clk_register_gates(node, hif_clks, ARRAY_SIZE(hif_clks),
58 clk_data);
59
60 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
61 if (r) {
62 dev_err(&pdev->dev,
63 "could not register clock provider: %s: %d\n",
64 pdev->name, r);
65 return r;
66 }
67
68 mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
69
70 return 0;
71 }
72
73 static struct platform_driver clk_mt2701_hif_drv = {
74 .probe = clk_mt2701_hif_probe,
75 .driver = {
76 .name = "clk-mt2701-hif",
77 .of_match_table = of_match_clk_mt2701_hif,
78 },
79 };
80
81 builtin_platform_driver(clk_mt2701_hif_drv);
82
