1 /*
2  * Copyright (c) 2017 MediaTek Inc.
3  * Author: Kevin 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 venc_cg_regs = {
24 	.set_ofs = 0x0004,
25 	.clr_ofs = 0x0008,
26 	.sta_ofs = 0x0000,
27 };
28 
29 #define GATE_VENC(_id, _name, _parent, _shift) {	\
30 		.id = _id,				\
31 		.name = _name,				\
32 		.parent_name = _parent,			\
33 		.regs = &venc_cg_regs,			\
34 		.shift = _shift,			\
35 		.ops = &mtk_clk_gate_ops_setclr_inv,	\
36 	}
37 
38 static const struct mtk_gate venc_clks[] = {
39 	GATE_VENC(CLK_VENC_0, "venc_0", "mm_sel", 0),
40 	GATE_VENC(CLK_VENC_1, "venc_1", "venc_sel", 4),
41 	GATE_VENC(CLK_VENC_2, "venc_2", "venc_sel", 8),
42 	GATE_VENC(CLK_VENC_3, "venc_3", "venc_sel", 12),
43 };
44 
45 static const struct of_device_id of_match_clk_mt6797_venc[] = {
46 	{ .compatible = "mediatek,mt6797-vencsys", },
47 	{}
48 };
49 
50 static int clk_mt6797_venc_probe(struct platform_device *pdev)
51 {
52 	struct clk_onecell_data *clk_data;
53 	int r;
54 	struct device_node *node = pdev->dev.of_node;
55 
56 	clk_data = mtk_alloc_clk_data(CLK_VENC_NR);
57 
58 	mtk_clk_register_gates(node, venc_clks, ARRAY_SIZE(venc_clks),
59 			       clk_data);
60 
61 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
62 	if (r)
63 		dev_err(&pdev->dev,
64 			"could not register clock provider: %s: %d\n",
65 			pdev->name, r);
66 
67 	return r;
68 }
69 
70 static struct platform_driver clk_mt6797_venc_drv = {
71 	.probe = clk_mt6797_venc_probe,
72 	.driver = {
73 		.name = "clk-mt6797-venc",
74 		.of_match_table = of_match_clk_mt6797_venc,
75 	},
76 };
77 
78 builtin_platform_driver(clk_mt6797_venc_drv);
79