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 mfg_cg_regs = {
24 	.set_ofs = 0x4,
25 	.clr_ofs = 0x8,
26 	.sta_ofs = 0x0,
27 };
28 
29 #define GATE_MFG(_id, _name, _parent, _shift) {	\
30 		.id = _id,				\
31 		.name = _name,				\
32 		.parent_name = _parent,			\
33 		.regs = &mfg_cg_regs,			\
34 		.shift = _shift,			\
35 		.ops = &mtk_clk_gate_ops_setclr,	\
36 	}
37 
38 static const struct mtk_gate mfg_clks[] = {
39 	GATE_MFG(CLK_MFG_BG3D, "mfg_bg3d", "mfg_sel", 0),
40 };
41 
42 static int clk_mt2712_mfg_probe(struct platform_device *pdev)
43 {
44 	struct clk_onecell_data *clk_data;
45 	int r;
46 	struct device_node *node = pdev->dev.of_node;
47 
48 	clk_data = mtk_alloc_clk_data(CLK_MFG_NR_CLK);
49 
50 	mtk_clk_register_gates(node, mfg_clks, ARRAY_SIZE(mfg_clks),
51 			clk_data);
52 
53 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
54 
55 	if (r != 0)
56 		pr_err("%s(): could not register clock provider: %d\n",
57 			__func__, r);
58 
59 	return r;
60 }
61 
62 static const struct of_device_id of_match_clk_mt2712_mfg[] = {
63 	{ .compatible = "mediatek,mt2712-mfgcfg", },
64 	{}
65 };
66 
67 static struct platform_driver clk_mt2712_mfg_drv = {
68 	.probe = clk_mt2712_mfg_probe,
69 	.driver = {
70 		.name = "clk-mt2712-mfg",
71 		.of_match_table = of_match_clk_mt2712_mfg,
72 	},
73 };
74 
75 builtin_platform_driver(clk_mt2712_mfg_drv);
76