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 | |
15 | static const struct clk_parent_data aux_parents[] = { |
16 | { .fw_name = "pll8_vote" , .name = "pll8_vote" }, |
17 | { .fw_name = "pxo" , .name = "pxo_board" }, |
18 | }; |
19 | |
20 | static const u32 aux_parent_map[] = { |
21 | 3, |
22 | 0, |
23 | }; |
24 | |
25 | static 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 | }; |
30 | MODULE_DEVICE_TABLE(of, kpss_xcc_match_table); |
31 | |
32 | static 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 | |
66 | static 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 | }; |
73 | module_platform_driver(kpss_xcc_driver); |
74 | |
75 | MODULE_DESCRIPTION("Krait Processor Sub System (KPSS) Clock Driver" ); |
76 | MODULE_LICENSE("GPL v2" ); |
77 | MODULE_ALIAS("platform:kpss-xcc" ); |
78 | |