xref: /linux/drivers/clk/mediatek/clk-mt2701-g3d.c (revision 2da68a77) 
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2018 MediaTek Inc.
4  * Author: Sean Wang <sean.wang@mediatek.com>
5  *
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/mt2701-clk.h>
18 
19 #define GATE_G3D(_id, _name, _parent, _shift) {	\
20 		.id = _id,				\
21 		.name = _name,				\
22 		.parent_name = _parent,			\
23 		.regs = &g3d_cg_regs,			\
24 		.shift = _shift,			\
25 		.ops = &mtk_clk_gate_ops_setclr,	\
26 	}
27 
28 static const struct mtk_gate_regs g3d_cg_regs = {
29 	.sta_ofs = 0x0,
30 	.set_ofs = 0x4,
31 	.clr_ofs = 0x8,
32 };
33 
34 static const struct mtk_gate g3d_clks[] = {
35 	GATE_G3D(CLK_G3DSYS_CORE, "g3d_core", "mfg_sel", 0),
36 };
37 
38 static u16 rst_ofs[] = { 0xc, };
39 
40 static const struct mtk_clk_rst_desc clk_rst_desc = {
41 	.version = MTK_RST_SIMPLE,
42 	.rst_bank_ofs = rst_ofs,
43 	.rst_bank_nr = ARRAY_SIZE(rst_ofs),
44 };
45 
46 static int clk_mt2701_g3dsys_init(struct platform_device *pdev)
47 {
48 	struct clk_hw_onecell_data *clk_data;
49 	struct device_node *node = pdev->dev.of_node;
50 	int r;
51 
52 	clk_data = mtk_alloc_clk_data(CLK_G3DSYS_NR);
53 
54 	mtk_clk_register_gates(node, g3d_clks, ARRAY_SIZE(g3d_clks),
55 			       clk_data);
56 
57 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
58 	if (r)
59 		dev_err(&pdev->dev,
60 			"could not register clock provider: %s: %d\n",
61 			pdev->name, r);
62 
63 	mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
64 
65 	return r;
66 }
67 
68 static const struct of_device_id of_match_clk_mt2701_g3d[] = {
69 	{
70 		.compatible = "mediatek,mt2701-g3dsys",
71 		.data = clk_mt2701_g3dsys_init,
72 	}, {
73 		/* sentinel */
74 	}
75 };
76 
77 static int clk_mt2701_g3d_probe(struct platform_device *pdev)
78 {
79 	int (*clk_init)(struct platform_device *);
80 	int r;
81 
82 	clk_init = of_device_get_match_data(&pdev->dev);
83 	if (!clk_init)
84 		return -EINVAL;
85 
86 	r = clk_init(pdev);
87 	if (r)
88 		dev_err(&pdev->dev,
89 			"could not register clock provider: %s: %d\n",
90 			pdev->name, r);
91 
92 	return r;
93 }
94 
95 static struct platform_driver clk_mt2701_g3d_drv = {
96 	.probe = clk_mt2701_g3d_probe,
97 	.driver = {
98 		.name = "clk-mt2701-g3d",
99 		.of_match_table = of_match_clk_mt2701_g3d,
100 	},
101 };
102 
103 builtin_platform_driver(clk_mt2701_g3d_drv);
104