1 /*
2  * Copyright (c) 2014 MediaTek Inc.
3  * Author: Shunli Wang <shunli.wang@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/mt2701-clk.h>
22 
23 static const struct mtk_gate_regs img_cg_regs = {
24 	.set_ofs = 0x0004,
25 	.clr_ofs = 0x0008,
26 	.sta_ofs = 0x0000,
27 };
28 
29 #define GATE_IMG(_id, _name, _parent, _shift) {		\
30 		.id = _id,				\
31 		.name = _name,				\
32 		.parent_name = _parent,			\
33 		.regs = &img_cg_regs,			\
34 		.shift = _shift,			\
35 		.ops = &mtk_clk_gate_ops_setclr,	\
36 	}
37 
38 static const struct mtk_gate img_clks[] = {
39 	GATE_IMG(CLK_IMG_SMI_COMM, "img_smi_comm", "mm_sel", 0),
40 	GATE_IMG(CLK_IMG_RESZ, "img_resz", "mm_sel", 1),
41 	GATE_IMG(CLK_IMG_JPGDEC_SMI, "img_jpgdec_smi", "mm_sel", 5),
42 	GATE_IMG(CLK_IMG_JPGDEC, "img_jpgdec", "mm_sel", 6),
43 	GATE_IMG(CLK_IMG_VENC_LT, "img_venc_lt", "mm_sel", 8),
44 	GATE_IMG(CLK_IMG_VENC, "img_venc", "mm_sel", 9),
45 };
46 
47 static const struct of_device_id of_match_clk_mt2701_img[] = {
48 	{ .compatible = "mediatek,mt2701-imgsys", },
49 	{}
50 };
51 
52 static int clk_mt2701_img_probe(struct platform_device *pdev)
53 {
54 	struct clk_onecell_data *clk_data;
55 	int r;
56 	struct device_node *node = pdev->dev.of_node;
57 
58 	clk_data = mtk_alloc_clk_data(CLK_IMG_NR);
59 
60 	mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks),
61 						clk_data);
62 
63 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
64 	if (r)
65 		dev_err(&pdev->dev,
66 			"could not register clock provider: %s: %d\n",
67 			pdev->name, r);
68 
69 	return r;
70 }
71 
72 static struct platform_driver clk_mt2701_img_drv = {
73 	.probe = clk_mt2701_img_probe,
74 	.driver = {
75 		.name = "clk-mt2701-img",
76 		.of_match_table = of_match_clk_mt2701_img,
77 	},
78 };
79 
80 builtin_platform_driver(clk_mt2701_img_drv);
81