1 /*
2 * Copyright (c) 2017 MediaTek Inc.
3 * Author: Kevin Chen <kevin-cw.chen@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/mt6797-clk.h>
22
23 static const struct mtk_gate_regs venc_cg_regs = {
24 .set_ofs = 0x0004,
25 .clr_ofs = 0x0008,
26 .sta_ofs = 0x0000,
27 };
28
29 #define GATE_VENC(_id, _name, _parent, _shift) { \
30 .id = _id, \
31 .name = _name, \
32 .parent_name = _parent, \
33 .regs = &venc_cg_regs, \
34 .shift = _shift, \
35 .ops = &mtk_clk_gate_ops_setclr_inv, \
36 }
37
38 static const struct mtk_gate venc_clks[] = {
39 GATE_VENC(CLK_VENC_0, "venc_0", "mm_sel", 0),
40 GATE_VENC(CLK_VENC_1, "venc_1", "venc_sel", 4),
41 GATE_VENC(CLK_VENC_2, "venc_2", "venc_sel", 8),
42 GATE_VENC(CLK_VENC_3, "venc_3", "venc_sel", 12),
43 };
44
45 static const struct of_device_id of_match_clk_mt6797_venc[] = {
46 { .compatible = "mediatek,mt6797-vencsys", },
47 {}
48 };
49
clk_mt6797_venc_probe(struct platform_device * pdev)50 static int clk_mt6797_venc_probe(struct platform_device *pdev)
51 {
52 struct clk_onecell_data *clk_data;
53 int r;
54 struct device_node *node = pdev->dev.of_node;
55
56 clk_data = mtk_alloc_clk_data(CLK_VENC_NR);
57
58 mtk_clk_register_gates(node, venc_clks, ARRAY_SIZE(venc_clks),
59 clk_data);
60
61 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
62 if (r)
63 dev_err(&pdev->dev,
64 "could not register clock provider: %s: %d\n",
65 pdev->name, r);
66
67 return r;
68 }
69
70 static struct platform_driver clk_mt6797_venc_drv = {
71 .probe = clk_mt6797_venc_probe,
72 .driver = {
73 .name = "clk-mt6797-venc",
74 .of_match_table = of_match_clk_mt6797_venc,
75 },
76 };
77
78 builtin_platform_driver(clk_mt6797_venc_drv);
79