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 jpgdec_cg_regs = {
24 .set_ofs = 0x4,
25 .clr_ofs = 0x8,
26 .sta_ofs = 0x0,
27 };
28
29 #define GATE_JPGDEC(_id, _name, _parent, _shift) { \
30 .id = _id, \
31 .name = _name, \
32 .parent_name = _parent, \
33 .regs = &jpgdec_cg_regs, \
34 .shift = _shift, \
35 .ops = &mtk_clk_gate_ops_setclr_inv, \
36 }
37
38 static const struct mtk_gate jpgdec_clks[] = {
39 GATE_JPGDEC(CLK_JPGDEC_JPGDEC1, "jpgdec_jpgdec1", "jpgdec_sel", 0),
40 GATE_JPGDEC(CLK_JPGDEC_JPGDEC, "jpgdec_jpgdec", "jpgdec_sel", 4),
41 };
42
clk_mt2712_jpgdec_probe(struct platform_device * pdev)43 static int clk_mt2712_jpgdec_probe(struct platform_device *pdev)
44 {
45 struct clk_onecell_data *clk_data;
46 int r;
47 struct device_node *node = pdev->dev.of_node;
48
49 clk_data = mtk_alloc_clk_data(CLK_JPGDEC_NR_CLK);
50
51 mtk_clk_register_gates(node, jpgdec_clks, ARRAY_SIZE(jpgdec_clks),
52 clk_data);
53
54 r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
55
56 if (r != 0)
57 pr_err("%s(): could not register clock provider: %d\n",
58 __func__, r);
59
60 return r;
61 }
62
63 static const struct of_device_id of_match_clk_mt2712_jpgdec[] = {
64 { .compatible = "mediatek,mt2712-jpgdecsys", },
65 {}
66 };
67
68 static struct platform_driver clk_mt2712_jpgdec_drv = {
69 .probe = clk_mt2712_jpgdec_probe,
70 .driver = {
71 .name = "clk-mt2712-jpgdec",
72 .of_match_table = of_match_clk_mt2712_jpgdec,
73 },
74 };
75
76 builtin_platform_driver(clk_mt2712_jpgdec_drv);
77