1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun // Copyright (c) 2018, The Linux Foundation. All rights reserved.
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <linux/kernel.h>
5*4882a593Smuzhiyun #include <linux/init.h>
6*4882a593Smuzhiyun #include <linux/module.h>
7*4882a593Smuzhiyun #include <linux/platform_device.h>
8*4882a593Smuzhiyun #include <linux/err.h>
9*4882a593Smuzhiyun #include <linux/io.h>
10*4882a593Smuzhiyun #include <linux/of.h>
11*4882a593Smuzhiyun #include <linux/of_device.h>
12*4882a593Smuzhiyun #include <linux/clk.h>
13*4882a593Smuzhiyun #include <linux/clk-provider.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static const char *aux_parents[] = {
16*4882a593Smuzhiyun "pll8_vote",
17*4882a593Smuzhiyun "pxo",
18*4882a593Smuzhiyun };
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun static unsigned int aux_parent_map[] = {
21*4882a593Smuzhiyun 3,
22*4882a593Smuzhiyun 0,
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun static const struct of_device_id kpss_xcc_match_table[] = {
26*4882a593Smuzhiyun { .compatible = "qcom,kpss-acc-v1", .data = (void *)1UL },
27*4882a593Smuzhiyun { .compatible = "qcom,kpss-gcc" },
28*4882a593Smuzhiyun {}
29*4882a593Smuzhiyun };
30*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, kpss_xcc_match_table);
31*4882a593Smuzhiyun
kpss_xcc_driver_probe(struct platform_device * pdev)32*4882a593Smuzhiyun static int kpss_xcc_driver_probe(struct platform_device *pdev)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun const struct of_device_id *id;
35*4882a593Smuzhiyun struct clk *clk;
36*4882a593Smuzhiyun struct resource *res;
37*4882a593Smuzhiyun void __iomem *base;
38*4882a593Smuzhiyun const char *name;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun id = of_match_device(kpss_xcc_match_table, &pdev->dev);
41*4882a593Smuzhiyun if (!id)
42*4882a593Smuzhiyun return -ENODEV;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
45*4882a593Smuzhiyun base = devm_ioremap_resource(&pdev->dev, res);
46*4882a593Smuzhiyun if (IS_ERR(base))
47*4882a593Smuzhiyun return PTR_ERR(base);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (id->data) {
50*4882a593Smuzhiyun if (of_property_read_string_index(pdev->dev.of_node,
51*4882a593Smuzhiyun "clock-output-names",
52*4882a593Smuzhiyun 0, &name))
53*4882a593Smuzhiyun return -ENODEV;
54*4882a593Smuzhiyun base += 0x14;
55*4882a593Smuzhiyun } else {
56*4882a593Smuzhiyun name = "acpu_l2_aux";
57*4882a593Smuzhiyun base += 0x28;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun clk = clk_register_mux_table(&pdev->dev, name, aux_parents,
61*4882a593Smuzhiyun ARRAY_SIZE(aux_parents), 0, base, 0, 0x3,
62*4882a593Smuzhiyun 0, aux_parent_map, NULL);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun platform_set_drvdata(pdev, clk);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun return PTR_ERR_OR_ZERO(clk);
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
kpss_xcc_driver_remove(struct platform_device * pdev)69*4882a593Smuzhiyun static int kpss_xcc_driver_remove(struct platform_device *pdev)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun clk_unregister_mux(platform_get_drvdata(pdev));
72*4882a593Smuzhiyun return 0;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static struct platform_driver kpss_xcc_driver = {
76*4882a593Smuzhiyun .probe = kpss_xcc_driver_probe,
77*4882a593Smuzhiyun .remove = kpss_xcc_driver_remove,
78*4882a593Smuzhiyun .driver = {
79*4882a593Smuzhiyun .name = "kpss-xcc",
80*4882a593Smuzhiyun .of_match_table = kpss_xcc_match_table,
81*4882a593Smuzhiyun },
82*4882a593Smuzhiyun };
83*4882a593Smuzhiyun module_platform_driver(kpss_xcc_driver);
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver");
86*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
87*4882a593Smuzhiyun MODULE_ALIAS("platform:kpss-xcc");
88