1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 MediaTek Inc.
3  * Author: Kevin Chen <kevin-cw.chen@mediatek.com>
4  */
5 
6 #include <linux/clk-provider.h>
7 #include <linux/platform_device.h>
8 #include <dt-bindings/clock/mt6797-clk.h>
9 
10 #include "clk-mtk.h"
11 #include "clk-gate.h"
12 
13 static const struct mtk_gate_regs img_cg_regs = {
14 	.set_ofs = 0x0004,
15 	.clr_ofs = 0x0008,
16 	.sta_ofs = 0x0000,
17 };
18 
19 #define GATE_IMG(_id, _name, _parent, _shift) {		\
20 		.id = _id,				\
21 		.name = _name,				\
22 		.parent_name = _parent,			\
23 		.regs = &img_cg_regs,			\
24 		.shift = _shift,			\
25 		.ops = &mtk_clk_gate_ops_setclr,	\
26 	}
27 
28 static const struct mtk_gate img_clks[] = {
29 	GATE_IMG(CLK_IMG_FDVT, "img_fdvt", "mm_sel", 11),
30 	GATE_IMG(CLK_IMG_DPE, "img_dpe", "mm_sel", 10),
31 	GATE_IMG(CLK_IMG_DIP, "img_dip", "mm_sel", 6),
32 	GATE_IMG(CLK_IMG_LARB6, "img_larb6", "mm_sel", 0),
33 };
34 
35 static const struct of_device_id of_match_clk_mt6797_img[] = {
36 	{ .compatible = "mediatek,mt6797-imgsys", },
37 	{}
38 };
39 
40 static int clk_mt6797_img_probe(struct platform_device *pdev)
41 {
42 	struct clk_hw_onecell_data *clk_data;
43 	int r;
44 	struct device_node *node = pdev->dev.of_node;
45 
46 	clk_data = mtk_alloc_clk_data(CLK_IMG_NR);
47 
48 	mtk_clk_register_gates(node, img_clks, ARRAY_SIZE(img_clks),
49 			       clk_data);
50 
51 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
52 	if (r)
53 		dev_err(&pdev->dev,
54 			"could not register clock provider: %s: %d\n",
55 			pdev->name, r);
56 
57 	return r;
58 }
59 
60 static struct platform_driver clk_mt6797_img_drv = {
61 	.probe = clk_mt6797_img_probe,
62 	.driver = {
63 		.name = "clk-mt6797-img",
64 		.of_match_table = of_match_clk_mt6797_img,
65 	},
66 };
67 
68 builtin_platform_driver(clk_mt6797_img_drv);
69