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 vdec0_cg_regs = {
16 	.set_ofs = 0x0000,
17 	.clr_ofs = 0x0004,
18 	.sta_ofs = 0x0000,
19 };
20 
21 static const struct mtk_gate_regs vdec1_cg_regs = {
22 	.set_ofs = 0x0008,
23 	.clr_ofs = 0x000c,
24 	.sta_ofs = 0x0008,
25 };
26 
27 #define GATE_VDEC0(_id, _name, _parent, _shift) {	\
28 		.id = _id,				\
29 		.name = _name,				\
30 		.parent_name = _parent,			\
31 		.regs = &vdec0_cg_regs,			\
32 		.shift = _shift,			\
33 		.ops = &mtk_clk_gate_ops_setclr_inv,	\
34 	}
35 
36 #define GATE_VDEC1(_id, _name, _parent, _shift) {	\
37 		.id = _id,				\
38 		.name = _name,				\
39 		.parent_name = _parent,			\
40 		.regs = &vdec1_cg_regs,			\
41 		.shift = _shift,			\
42 		.ops = &mtk_clk_gate_ops_setclr_inv,	\
43 	}
44 
45 static const struct mtk_gate vdec_clks[] = {
46 	GATE_VDEC0(CLK_VDEC_CKGEN, "vdec_cken", "vdec_sel", 0),
47 	GATE_VDEC1(CLK_VDEC_LARB, "vdec_larb_cken", "mm_sel", 0),
48 };
49 
50 static const struct of_device_id of_match_clk_mt2701_vdec[] = {
51 	{ .compatible = "mediatek,mt2701-vdecsys", },
52 	{}
53 };
54 
55 static int clk_mt2701_vdec_probe(struct platform_device *pdev)
56 {
57 	struct clk_hw_onecell_data *clk_data;
58 	int r;
59 	struct device_node *node = pdev->dev.of_node;
60 
61 	clk_data = mtk_alloc_clk_data(CLK_VDEC_NR);
62 
63 	mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks),
64 						clk_data);
65 
66 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
67 	if (r)
68 		dev_err(&pdev->dev,
69 			"could not register clock provider: %s: %d\n",
70 			pdev->name, r);
71 
72 	return r;
73 }
74 
75 static struct platform_driver clk_mt2701_vdec_drv = {
76 	.probe = clk_mt2701_vdec_probe,
77 	.driver = {
78 		.name = "clk-mt2701-vdec",
79 		.of_match_table = of_match_clk_mt2701_vdec,
80 	},
81 };
82 
83 builtin_platform_driver(clk_mt2701_vdec_drv);
84