1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2017 MediaTek Inc.
4  * Author: Kevin-CW Chen <kevin-cw.chen@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/mt6797-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_CKEN_ENG, "vdec_cken_eng", "vdec_sel", 8),
47 	GATE_VDEC0(CLK_VDEC_ACTIVE, "vdec_active", "vdec_sel", 4),
48 	GATE_VDEC0(CLK_VDEC_CKEN, "vdec_cken", "vdec_sel", 0),
49 	GATE_VDEC1(CLK_VDEC_LARB1_CKEN, "vdec_larb1_cken", "mm_sel", 0),
50 };
51 
52 static const struct of_device_id of_match_clk_mt6797_vdec[] = {
53 	{ .compatible = "mediatek,mt6797-vdecsys", },
54 	{}
55 };
56 
57 static int clk_mt6797_vdec_probe(struct platform_device *pdev)
58 {
59 	struct clk_hw_onecell_data *clk_data;
60 	int r;
61 	struct device_node *node = pdev->dev.of_node;
62 
63 	clk_data = mtk_alloc_clk_data(CLK_VDEC_NR);
64 
65 	mtk_clk_register_gates(node, vdec_clks, ARRAY_SIZE(vdec_clks),
66 			       clk_data);
67 
68 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
69 	if (r)
70 		dev_err(&pdev->dev,
71 			"could not register clock provider: %s: %d\n",
72 			pdev->name, r);
73 
74 	return r;
75 }
76 
77 static struct platform_driver clk_mt6797_vdec_drv = {
78 	.probe = clk_mt6797_vdec_probe,
79 	.driver = {
80 		.name = "clk-mt6797-vdec",
81 		.of_match_table = of_match_clk_mt6797_vdec,
82 	},
83 };
84 
85 builtin_platform_driver(clk_mt6797_vdec_drv);
86