1 /*
2  * Copyright (c) 2017 MediaTek Inc.
3  * Author: Kevin-CW Chen <kevin-cw.chen@mediatek.com>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  */
14 
15 #include <linux/clk-provider.h>
16 #include <linux/platform_device.h>
17 
18 #include "clk-mtk.h"
19 #include "clk-gate.h"
20 
21 #include <dt-bindings/clock/mt6797-clk.h>
22 
23 static const struct mtk_gate_regs vdec0_cg_regs = {
24 	.set_ofs = 0x0000,
25 	.clr_ofs = 0x0004,
26 	.sta_ofs = 0x0000,
27 };
28 
29 static const struct mtk_gate_regs vdec1_cg_regs = {
30 	.set_ofs = 0x0008,
31 	.clr_ofs = 0x000c,
32 	.sta_ofs = 0x0008,
33 };
34 
35 #define GATE_VDEC0(_id, _name, _parent, _shift) {		\
36 	.id = _id,					\
37 	.name = _name,					\
38 	.parent_name = _parent,				\
39 	.regs = &vdec0_cg_regs,				\
40 	.shift = _shift,				\
41 	.ops = &mtk_clk_gate_ops_setclr_inv,		\
42 }
43 
44 #define GATE_VDEC1(_id, _name, _parent, _shift) {		\
45 	.id = _id,					\
46 	.name = _name,					\
47 	.parent_name = _parent,				\
48 	.regs = &vdec1_cg_regs,				\
49 	.shift = _shift,				\
50 	.ops = &mtk_clk_gate_ops_setclr_inv,		\
51 }
52 
53 static const struct mtk_gate vdec_clks[] = {
54 	GATE_VDEC0(CLK_VDEC_CKEN_ENG, "vdec_cken_eng", "vdec_sel", 8),
55 	GATE_VDEC0(CLK_VDEC_ACTIVE, "vdec_active", "vdec_sel", 4),
56 	GATE_VDEC0(CLK_VDEC_CKEN, "vdec_cken", "vdec_sel", 0),
57 	GATE_VDEC1(CLK_VDEC_LARB1_CKEN, "vdec_larb1_cken", "mm_sel", 0),
58 };
59 
60 static const struct of_device_id of_match_clk_mt6797_vdec[] = {
61 	{ .compatible = "mediatek,mt6797-vdecsys", },
62 	{}
63 };
64 
65 static int clk_mt6797_vdec_probe(struct platform_device *pdev)
66 {
67 	struct clk_onecell_data *clk_data;
68 	int r;
69 	struct device_node *node = pdev->dev.of_node;
70 
71 	clk_data = mtk_alloc_clk_data(CLK_VDEC_NR);
72 
73 	mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks),
74 			       clk_data);
75 
76 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
77 	if (r)
78 		dev_err(&pdev->dev,
79 			"could not register clock provider: %s: %d\n",
80 			pdev->name, r);
81 
82 	return r;
83 }
84 
85 static struct platform_driver clk_mt6797_vdec_drv = {
86 	.probe = clk_mt6797_vdec_probe,
87 	.driver = {
88 		.name = "clk-mt6797-vdec",
89 		.of_match_table = of_match_clk_mt6797_vdec,
90 	},
91 };
92 
93 builtin_platform_driver(clk_mt6797_vdec_drv);
94