1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4 */
5
6 #include <linux/kernel.h>
7 #include <linux/err.h>
8 #include <linux/platform_device.h>
9 #include <linux/clk-provider.h>
10 #include <linux/regmap.h>
11 #include <linux/module.h>
12
13 #include <dt-bindings/clock/qcom,apss-ipq.h>
14
15 #include "common.h"
16 #include "clk-regmap.h"
17 #include "clk-branch.h"
18 #include "clk-alpha-pll.h"
19 #include "clk-rcg.h"
20
21 enum {
22 P_XO,
23 P_APSS_PLL_EARLY,
24 };
25
26 static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
27 { .fw_name = "xo" },
28 { .fw_name = "pll" },
29 };
30
31 static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
32 { P_XO, 0 },
33 { P_APSS_PLL_EARLY, 5 },
34 };
35
36 static struct clk_rcg2 apcs_alias0_clk_src = {
37 .cmd_rcgr = 0x0050,
38 .hid_width = 5,
39 .parent_map = parents_apcs_alias0_clk_src_map,
40 .clkr.hw.init = &(struct clk_init_data){
41 .name = "apcs_alias0_clk_src",
42 .parent_data = parents_apcs_alias0_clk_src,
43 .num_parents = ARRAY_SIZE(parents_apcs_alias0_clk_src),
44 .ops = &clk_rcg2_mux_closest_ops,
45 .flags = CLK_SET_RATE_PARENT,
46 },
47 };
48
49 static struct clk_branch apcs_alias0_core_clk = {
50 .halt_reg = 0x0058,
51 .clkr = {
52 .enable_reg = 0x0058,
53 .enable_mask = BIT(0),
54 .hw.init = &(struct clk_init_data){
55 .name = "apcs_alias0_core_clk",
56 .parent_hws = (const struct clk_hw *[]){
57 &apcs_alias0_clk_src.clkr.hw },
58 .num_parents = 1,
59 .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
60 .ops = &clk_branch2_ops,
61 },
62 },
63 };
64
65 static const struct regmap_config apss_ipq6018_regmap_config = {
66 .reg_bits = 32,
67 .reg_stride = 4,
68 .val_bits = 32,
69 .max_register = 0x1000,
70 .fast_io = true,
71 };
72
73 static struct clk_regmap *apss_ipq6018_clks[] = {
74 [APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
75 [APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
76 };
77
78 static const struct qcom_cc_desc apss_ipq6018_desc = {
79 .config = &apss_ipq6018_regmap_config,
80 .clks = apss_ipq6018_clks,
81 .num_clks = ARRAY_SIZE(apss_ipq6018_clks),
82 };
83
apss_ipq6018_probe(struct platform_device * pdev)84 static int apss_ipq6018_probe(struct platform_device *pdev)
85 {
86 struct regmap *regmap;
87
88 regmap = dev_get_regmap(pdev->dev.parent, NULL);
89 if (!regmap)
90 return -ENODEV;
91
92 return qcom_cc_really_probe(pdev, &apss_ipq6018_desc, regmap);
93 }
94
95 static struct platform_driver apss_ipq6018_driver = {
96 .probe = apss_ipq6018_probe,
97 .driver = {
98 .name = "qcom,apss-ipq6018-clk",
99 },
100 };
101
102 module_platform_driver(apss_ipq6018_driver);
103
104 MODULE_DESCRIPTION("QCOM APSS IPQ 6018 CLK Driver");
105 MODULE_LICENSE("GPL v2");
106