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-regmap-mux.h"
20
21enum {
22	P_XO,
23	P_APSS_PLL_EARLY,
24};
25
26static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
27	{ .fw_name = "xo" },
28	{ .fw_name = "pll" },
29};
30
31static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
32	{ P_XO, 0 },
33	{ P_APSS_PLL_EARLY, 5 },
34};
35
36static struct clk_regmap_mux apcs_alias0_clk_src = {
37	.reg = 0x0050,
38	.width = 3,
39	.shift = 7,
40	.parent_map = parents_apcs_alias0_clk_src_map,
41	.clkr.hw.init = &(struct clk_init_data){
42		.name = "apcs_alias0_clk_src",
43		.parent_data = parents_apcs_alias0_clk_src,
44		.num_parents = 2,
45		.ops = &clk_regmap_mux_closest_ops,
46		.flags = CLK_SET_RATE_PARENT,
47	},
48};
49
50static struct clk_branch apcs_alias0_core_clk = {
51	.halt_reg = 0x0058,
52	.clkr = {
53		.enable_reg = 0x0058,
54		.enable_mask = BIT(0),
55		.hw.init = &(struct clk_init_data){
56			.name = "apcs_alias0_core_clk",
57			.parent_hws = (const struct clk_hw *[]){
58				&apcs_alias0_clk_src.clkr.hw },
59			.num_parents = 1,
60			.flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
61			.ops = &clk_branch2_ops,
62		},
63	},
64};
65
66static const struct regmap_config apss_ipq6018_regmap_config = {
67	.reg_bits       = 32,
68	.reg_stride     = 4,
69	.val_bits       = 32,
70	.max_register   = 0x1000,
71	.fast_io        = true,
72};
73
74static struct clk_regmap *apss_ipq6018_clks[] = {
75	[APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
76	[APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
77};
78
79static const struct qcom_cc_desc apss_ipq6018_desc = {
80	.config = &apss_ipq6018_regmap_config,
81	.clks = apss_ipq6018_clks,
82	.num_clks = ARRAY_SIZE(apss_ipq6018_clks),
83};
84
85static int apss_ipq6018_probe(struct platform_device *pdev)
86{
87	struct regmap *regmap;
88
89	regmap = dev_get_regmap(pdev->dev.parent, NULL);
90	if (!regmap)
91		return -ENODEV;
92
93	return qcom_cc_really_probe(pdev, &apss_ipq6018_desc, regmap);
94}
95
96static struct platform_driver apss_ipq6018_driver = {
97	.probe = apss_ipq6018_probe,
98	.driver = {
99		.name   = "qcom,apss-ipq6018-clk",
100	},
101};
102
103module_platform_driver(apss_ipq6018_driver);
104
105MODULE_DESCRIPTION("QCOM APSS IPQ 6018 CLK Driver");
106MODULE_LICENSE("GPL v2");
107