1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/kernel.h>
7*4882a593Smuzhiyun #include <linux/err.h>
8*4882a593Smuzhiyun #include <linux/platform_device.h>
9*4882a593Smuzhiyun #include <linux/clk-provider.h>
10*4882a593Smuzhiyun #include <linux/regmap.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <dt-bindings/clock/qcom,apss-ipq.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "common.h"
16*4882a593Smuzhiyun #include "clk-regmap.h"
17*4882a593Smuzhiyun #include "clk-branch.h"
18*4882a593Smuzhiyun #include "clk-alpha-pll.h"
19*4882a593Smuzhiyun #include "clk-regmap-mux.h"
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun enum {
22*4882a593Smuzhiyun P_XO,
23*4882a593Smuzhiyun P_APSS_PLL_EARLY,
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static const struct clk_parent_data parents_apcs_alias0_clk_src[] = {
27*4882a593Smuzhiyun { .fw_name = "xo" },
28*4882a593Smuzhiyun { .fw_name = "pll" },
29*4882a593Smuzhiyun };
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun static const struct parent_map parents_apcs_alias0_clk_src_map[] = {
32*4882a593Smuzhiyun { P_XO, 0 },
33*4882a593Smuzhiyun { P_APSS_PLL_EARLY, 5 },
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun static struct clk_regmap_mux apcs_alias0_clk_src = {
37*4882a593Smuzhiyun .reg = 0x0050,
38*4882a593Smuzhiyun .width = 3,
39*4882a593Smuzhiyun .shift = 7,
40*4882a593Smuzhiyun .parent_map = parents_apcs_alias0_clk_src_map,
41*4882a593Smuzhiyun .clkr.hw.init = &(struct clk_init_data){
42*4882a593Smuzhiyun .name = "apcs_alias0_clk_src",
43*4882a593Smuzhiyun .parent_data = parents_apcs_alias0_clk_src,
44*4882a593Smuzhiyun .num_parents = 2,
45*4882a593Smuzhiyun .ops = &clk_regmap_mux_closest_ops,
46*4882a593Smuzhiyun .flags = CLK_SET_RATE_PARENT,
47*4882a593Smuzhiyun },
48*4882a593Smuzhiyun };
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun static struct clk_branch apcs_alias0_core_clk = {
51*4882a593Smuzhiyun .halt_reg = 0x0058,
52*4882a593Smuzhiyun .clkr = {
53*4882a593Smuzhiyun .enable_reg = 0x0058,
54*4882a593Smuzhiyun .enable_mask = BIT(0),
55*4882a593Smuzhiyun .hw.init = &(struct clk_init_data){
56*4882a593Smuzhiyun .name = "apcs_alias0_core_clk",
57*4882a593Smuzhiyun .parent_hws = (const struct clk_hw *[]){
58*4882a593Smuzhiyun &apcs_alias0_clk_src.clkr.hw },
59*4882a593Smuzhiyun .num_parents = 1,
60*4882a593Smuzhiyun .flags = CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
61*4882a593Smuzhiyun .ops = &clk_branch2_ops,
62*4882a593Smuzhiyun },
63*4882a593Smuzhiyun },
64*4882a593Smuzhiyun };
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun static const struct regmap_config apss_ipq6018_regmap_config = {
67*4882a593Smuzhiyun .reg_bits = 32,
68*4882a593Smuzhiyun .reg_stride = 4,
69*4882a593Smuzhiyun .val_bits = 32,
70*4882a593Smuzhiyun .max_register = 0x1000,
71*4882a593Smuzhiyun .fast_io = true,
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun static struct clk_regmap *apss_ipq6018_clks[] = {
75*4882a593Smuzhiyun [APCS_ALIAS0_CLK_SRC] = &apcs_alias0_clk_src.clkr,
76*4882a593Smuzhiyun [APCS_ALIAS0_CORE_CLK] = &apcs_alias0_core_clk.clkr,
77*4882a593Smuzhiyun };
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun static const struct qcom_cc_desc apss_ipq6018_desc = {
80*4882a593Smuzhiyun .config = &apss_ipq6018_regmap_config,
81*4882a593Smuzhiyun .clks = apss_ipq6018_clks,
82*4882a593Smuzhiyun .num_clks = ARRAY_SIZE(apss_ipq6018_clks),
83*4882a593Smuzhiyun };
84*4882a593Smuzhiyun
apss_ipq6018_probe(struct platform_device * pdev)85*4882a593Smuzhiyun static int apss_ipq6018_probe(struct platform_device *pdev)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun struct regmap *regmap;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun regmap = dev_get_regmap(pdev->dev.parent, NULL);
90*4882a593Smuzhiyun if (!regmap)
91*4882a593Smuzhiyun return -ENODEV;
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun return qcom_cc_really_probe(pdev, &apss_ipq6018_desc, regmap);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun static struct platform_driver apss_ipq6018_driver = {
97*4882a593Smuzhiyun .probe = apss_ipq6018_probe,
98*4882a593Smuzhiyun .driver = {
99*4882a593Smuzhiyun .name = "qcom,apss-ipq6018-clk",
100*4882a593Smuzhiyun },
101*4882a593Smuzhiyun };
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun module_platform_driver(apss_ipq6018_driver);
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun MODULE_DESCRIPTION("QCOM APSS IPQ 6018 CLK Driver");
106*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
107