1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2018, The Linux Foundation. All rights reserved.
3
4#include <linux/kernel.h>
5#include <linux/init.h>
6#include <linux/module.h>
7#include <linux/platform_device.h>
8#include <linux/property.h>
9#include <linux/err.h>
10#include <linux/io.h>
11#include <linux/of.h>
12#include <linux/clk.h>
13#include <linux/clk-provider.h>
14
15static const struct clk_parent_data aux_parents[] = {
16 { .fw_name = "pll8_vote", .name = "pll8_vote" },
17 { .fw_name = "pxo", .name = "pxo_board" },
18};
19
20static const u32 aux_parent_map[] = {
21 3,
22 0,
23};
24
25static const struct of_device_id kpss_xcc_match_table[] = {
26 { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
27 { .compatible = "qcom,kpss-gcc" },
28 {}
29};
30MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
31
32static int kpss_xcc_driver_probe(struct platform_device *pdev)
33{
34 struct device *dev = &pdev->dev;
35 void __iomem *base;
36 struct clk_hw *hw;
37 const char *name;
38
39 base = devm_platform_ioremap_resource(pdev, index: 0);
40 if (IS_ERR(ptr: base))
41 return PTR_ERR(ptr: base);
42
43 if (device_get_match_data(dev: &pdev->dev)) {
44 if (of_property_read_string_index(np: dev->of_node,
45 propname: "clock-output-names",
46 index: 0, output: &name))
47 return -ENODEV;
48 base += 0x14;
49 } else {
50 name = "acpu_l2_aux";
51 base += 0x28;
52 }
53
54 hw = devm_clk_hw_register_mux_parent_data_table(dev, name, aux_parents,
55 ARRAY_SIZE(aux_parents), 0,
56 base, 0, 0x3,
57 0, aux_parent_map, NULL);
58 if (IS_ERR(ptr: hw))
59 return PTR_ERR(ptr: hw);
60
61 of_clk_add_hw_provider(np: dev->of_node, get: of_clk_hw_simple_get, data: hw);
62
63 return 0;
64}
65
66static struct platform_driver kpss_xcc_driver = {
67 .probe = kpss_xcc_driver_probe,
68 .driver = {
69 .name = "kpss-xcc",
70 .of_match_table = kpss_xcc_match_table,
71 },
72};
73module_platform_driver(kpss_xcc_driver);
74
75MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
76MODULE_LICENSE("GPL v2");
77MODULE_ALIAS("platform:kpss-xcc");
78

source code of linux/drivers/clk/qcom/kpss-xcc.c