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 
clk_mt2701_g3dsys_init(struct platform_device * pdev)38 static int clk_mt2701_g3dsys_init(struct platform_device *pdev)
39 {
40 	struct clk_onecell_data *clk_data;
41 	struct device_node *node = pdev->dev.of_node;
42 	int r;
43 
44 	clk_data = mtk_alloc_clk_data(CLK_G3DSYS_NR);
45 
46 	mtk_clk_register_gates(node, g3d_clks, ARRAY_SIZE(g3d_clks),
47 			       clk_data);
48 
49 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
50 	if (r)
51 		dev_err(&pdev->dev,
52 			"could not register clock provider: %s: %d\n",
53 			pdev->name, r);
54 
55 	mtk_register_reset_controller(node, 1, 0xc);
56 
57 	return r;
58 }
59 
60 static const struct of_device_id of_match_clk_mt2701_g3d[] = {
61 	{
62 		.compatible = "mediatek,mt2701-g3dsys",
63 		.data = clk_mt2701_g3dsys_init,
64 	}, {
65 		/* sentinel */
66 	}
67 };
68 
clk_mt2701_g3d_probe(struct platform_device * pdev)69 static int clk_mt2701_g3d_probe(struct platform_device *pdev)
70 {
71 	int (*clk_init)(struct platform_device *);
72 	int r;
73 
74 	clk_init = of_device_get_match_data(&pdev->dev);
75 	if (!clk_init)
76 		return -EINVAL;
77 
78 	r = clk_init(pdev);
79 	if (r)
80 		dev_err(&pdev->dev,
81 			"could not register clock provider: %s: %d\n",
82 			pdev->name, r);
83 
84 	return r;
85 }
86 
87 static struct platform_driver clk_mt2701_g3d_drv = {
88 	.probe = clk_mt2701_g3d_probe,
89 	.driver = {
90 		.name = "clk-mt2701-g3d",
91 		.of_match_table = of_match_clk_mt2701_g3d,
92 	},
93 };
94 
95 builtin_platform_driver(clk_mt2701_g3d_drv);
96