kpss-xcc.c

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