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, 0);
40	if (IS_ERR(base))
41		return PTR_ERR(base);
42
43	if (device_get_match_data(&pdev->dev)) {
44		if (of_property_read_string_index(dev->of_node,
45						  "clock-output-names",
46						  0, &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(hw))
59		return PTR_ERR(hw);
60
61	of_clk_add_hw_provider(dev->of_node, of_clk_hw_simple_get, 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