1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2017 MediaTek Inc.
4  * Author: Kevin Chen <kevin-cw.chen@mediatek.com>
5  */
6 
7 #include <linux/clk-provider.h>
8 #include <linux/platform_device.h>
9 
10 #include "clk-mtk.h"
11 #include "clk-gate.h"
12 
13 #include <dt-bindings/clock/mt6797-clk.h>
14 
15 static const struct mtk_gate_regs venc_cg_regs = {
16 	.set_ofs = 0x0004,
17 	.clr_ofs = 0x0008,
18 	.sta_ofs = 0x0000,
19 };
20 
21 #define GATE_VENC(_id, _name, _parent, _shift) {	\
22 		.id = _id,				\
23 		.name = _name,				\
24 		.parent_name = _parent,			\
25 		.regs = &venc_cg_regs,			\
26 		.shift = _shift,			\
27 		.ops = &mtk_clk_gate_ops_setclr_inv,	\
28 	}
29 
30 static const struct mtk_gate venc_clks[] = {
31 	GATE_VENC(CLK_VENC_0, "venc_0", "mm_sel", 0),
32 	GATE_VENC(CLK_VENC_1, "venc_1", "venc_sel", 4),
33 	GATE_VENC(CLK_VENC_2, "venc_2", "venc_sel", 8),
34 	GATE_VENC(CLK_VENC_3, "venc_3", "venc_sel", 12),
35 };
36 
37 static const struct of_device_id of_match_clk_mt6797_venc[] = {
38 	{ .compatible = "mediatek,mt6797-vencsys", },
39 	{}
40 };
41 
42 static int clk_mt6797_venc_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_VENC_NR);
49 
50 	mtk_clk_register_gates(node, venc_clks, ARRAY_SIZE(venc_clks),
51 			       clk_data);
52 
53 	r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
54 	if (r)
55 		dev_err(&pdev->dev,
56 			"could not register clock provider: %s: %d\n",
57 			pdev->name, r);
58 
59 	return r;
60 }
61 
62 static struct platform_driver clk_mt6797_venc_drv = {
63 	.probe = clk_mt6797_venc_probe,
64 	.driver = {
65 		.name = "clk-mt6797-venc",
66 		.of_match_table = of_match_clk_mt6797_venc,
67 	},
68 };
69 
70 builtin_platform_driver(clk_mt6797_venc_drv);
71