1 // SPDX-License-Identifier: GPL-2.0-only
2 //
3 // Copyright (c) 2021 MediaTek Inc.
4 // Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
5
6 #include "clk-mtk.h"
7 #include "clk-pll.h"
8
9 #include <dt-bindings/clock/mt8195-clk.h>
10 #include <linux/clk-provider.h>
11 #include <linux/platform_device.h>
12
13 #define MT8195_PLL_FMAX (3800UL * MHZ)
14 #define MT8195_PLL_FMIN (1500UL * MHZ)
15 #define MT8195_INTEGER_BITS (8)
16 #define MT8195_PCW_BITS (22)
17 #define MT8195_POSDIV_SHIFT (24)
18 #define MT8195_PLL_EN_BIT (0)
19 #define MT8195_PCW_SHIFT (0)
20
21 /*
22 * The "en_reg" and "pcw_chg_reg" fields are standard offset register compared
23 * with "reg" field, so set zero to imply it.
24 * No tuner control in apu pll, so set "tuner_XXX" as zero to imply it.
25 * No rst or post divider enable in apu pll, so set "rst_bar_mask" and "en_mask"
26 * as zero to imply it.
27 */
28 #define PLL(_id, _name, _reg, _pwr_reg, _pd_reg, _pcw_reg) { \
29 .id = _id, \
30 .name = _name, \
31 .reg = _reg, \
32 .pwr_reg = _pwr_reg, \
33 .en_mask = 0, \
34 .flags = 0, \
35 .rst_bar_mask = 0, \
36 .fmax = MT8195_PLL_FMAX, \
37 .fmin = MT8195_PLL_FMIN, \
38 .pcwbits = MT8195_PCW_BITS, \
39 .pcwibits = MT8195_INTEGER_BITS, \
40 .pd_reg = _pd_reg, \
41 .pd_shift = MT8195_POSDIV_SHIFT, \
42 .tuner_reg = 0, \
43 .tuner_en_reg = 0, \
44 .tuner_en_bit = 0, \
45 .pcw_reg = _pcw_reg, \
46 .pcw_shift = MT8195_PCW_SHIFT, \
47 .pcw_chg_reg = 0, \
48 .en_reg = 0, \
49 .pll_en_bit = MT8195_PLL_EN_BIT, \
50 }
51
52 static const struct mtk_pll_data apusys_plls[] = {
53 PLL(CLK_APUSYS_PLL_APUPLL, "apusys_pll_apupll", 0x008, 0x014, 0x00c, 0x00c),
54 PLL(CLK_APUSYS_PLL_NPUPLL, "apusys_pll_npupll", 0x018, 0x024, 0x01c, 0x01c),
55 PLL(CLK_APUSYS_PLL_APUPLL1, "apusys_pll_apupll1", 0x028, 0x034, 0x02c, 0x02c),
56 PLL(CLK_APUSYS_PLL_APUPLL2, "apusys_pll_apupll2", 0x038, 0x044, 0x03c, 0x03c),
57 };
58
clk_mt8195_apusys_pll_probe(struct platform_device * pdev)59 static int clk_mt8195_apusys_pll_probe(struct platform_device *pdev)
60 {
61 struct clk_hw_onecell_data *clk_data;
62 struct device_node *node = pdev->dev.of_node;
63 int r;
64
65 clk_data = mtk_alloc_clk_data(CLK_APUSYS_PLL_NR_CLK);
66 if (!clk_data)
67 return -ENOMEM;
68
69 r = mtk_clk_register_plls(node, apusys_plls, ARRAY_SIZE(apusys_plls), clk_data);
70 if (r)
71 goto free_apusys_pll_data;
72
73 r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
74 if (r)
75 goto unregister_plls;
76
77 platform_set_drvdata(pdev, clk_data);
78
79 return r;
80
81 unregister_plls:
82 mtk_clk_unregister_plls(apusys_plls, ARRAY_SIZE(apusys_plls), clk_data);
83 free_apusys_pll_data:
84 mtk_free_clk_data(clk_data);
85 return r;
86 }
87
clk_mt8195_apusys_pll_remove(struct platform_device * pdev)88 static void clk_mt8195_apusys_pll_remove(struct platform_device *pdev)
89 {
90 struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
91 struct device_node *node = pdev->dev.of_node;
92
93 of_clk_del_provider(node);
94 mtk_clk_unregister_plls(apusys_plls, ARRAY_SIZE(apusys_plls), clk_data);
95 mtk_free_clk_data(clk_data);
96 }
97
98 static const struct of_device_id of_match_clk_mt8195_apusys_pll[] = {
99 { .compatible = "mediatek,mt8195-apusys_pll", },
100 {}
101 };
102 MODULE_DEVICE_TABLE(of, of_match_clk_mt8195_apusys_pll);
103
104 static struct platform_driver clk_mt8195_apusys_pll_drv = {
105 .probe = clk_mt8195_apusys_pll_probe,
106 .remove = clk_mt8195_apusys_pll_remove,
107 .driver = {
108 .name = "clk-mt8195-apusys_pll",
109 .of_match_table = of_match_clk_mt8195_apusys_pll,
110 },
111 };
112 module_platform_driver(clk_mt8195_apusys_pll_drv);
113
114 MODULE_DESCRIPTION("MediaTek MT8195 AI Processing Unit PLL clocks driver");
115 MODULE_LICENSE("GPL");
116