1 /*
2  * Copyright (c) 2017 MediaTek Inc.
3  * Author: Weiyi Lu <weiyi.lu@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/mt2712-clk.h>
22 
23 static const struct mtk_gate_regs jpgdec_cg_regs = {
24 	.set_ofs = 0x4,
25 	.clr_ofs = 0x8,
26 	.sta_ofs = 0x0,
27 };
28 
29 #define GATE_JPGDEC(_id, _name, _parent, _shift) {	\
30 		.id = _id,				\
31 		.name = _name,				\
32 		.parent_name = _parent,			\
33 		.regs = &jpgdec_cg_regs,			\
34 		.shift = _shift,			\
35 		.ops = &mtk_clk_gate_ops_setclr_inv,	\
36 	}
37 
38 static const struct mtk_gate jpgdec_clks[] = {
39 	GATE_JPGDEC(CLK_JPGDEC_JPGDEC1, "jpgdec_jpgdec1", "jpgdec_sel", 0),
40 	GATE_JPGDEC(CLK_JPGDEC_JPGDEC, "jpgdec_jpgdec", "jpgdec_sel", 4),
41 };
42 
43 static int clk_mt2712_jpgdec_probe(struct platform_device *pdev)
44 {
45 	struct clk_onecell_data *clk_data;
46 	int r;
47 	struct device_node *node = pdev->dev.of_node;
48 
49 	clk_data = mtk_alloc_clk_data(CLK_JPGDEC_NR_CLK);
50 
51 	mtk_clk_register_gates(node, jpgdec_clks, ARRAY_SIZE(jpgdec_clks),
52 			clk_data);
53 
54 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
55 
56 	if (r != 0)
57 		pr_err("%s(): could not register clock provider: %d\n",
58 			__func__, r);
59 
60 	return r;
61 }
62 
63 static const struct of_device_id of_match_clk_mt2712_jpgdec[] = {
64 	{ .compatible = "mediatek,mt2712-jpgdecsys", },
65 	{}
66 };
67 
68 static struct platform_driver clk_mt2712_jpgdec_drv = {
69 	.probe = clk_mt2712_jpgdec_probe,
70 	.driver = {
71 		.name = "clk-mt2712-jpgdec",
72 		.of_match_table = of_match_clk_mt2712_jpgdec,
73 	},
74 };
75 
76 builtin_platform_driver(clk_mt2712_jpgdec_drv);
77