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036f29d5 ZG |
1 | /* |
2 | * Copyright (c) 2013 Linaro Ltd. | |
3 | * Copyright (c) 2013 Hisilicon Limited. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | */ | |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/clk.h> | |
14 | #include <linux/mmc/host.h> | |
15 | #include <linux/mmc/dw_mmc.h> | |
16 | #include <linux/of_address.h> | |
17 | ||
18 | #include "dw_mmc.h" | |
19 | #include "dw_mmc-pltfm.h" | |
20 | ||
036f29d5 ZG |
21 | static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios) |
22 | { | |
036f29d5 ZG |
23 | int ret; |
24 | ||
0e662440 | 25 | ret = clk_set_rate(host->ciu_clk, ios->clock); |
036f29d5 | 26 | if (ret) |
0e662440 | 27 | dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock); |
036f29d5 ZG |
28 | |
29 | host->bus_hz = clk_get_rate(host->ciu_clk); | |
30 | } | |
31 | ||
036f29d5 ZG |
32 | static const struct dw_mci_drv_data k3_drv_data = { |
33 | .set_ios = dw_mci_k3_set_ios, | |
036f29d5 ZG |
34 | }; |
35 | ||
36 | static const struct of_device_id dw_mci_k3_match[] = { | |
37 | { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, }, | |
38 | {}, | |
39 | }; | |
40 | MODULE_DEVICE_TABLE(of, dw_mci_k3_match); | |
41 | ||
42 | static int dw_mci_k3_probe(struct platform_device *pdev) | |
43 | { | |
44 | const struct dw_mci_drv_data *drv_data; | |
45 | const struct of_device_id *match; | |
46 | ||
47 | match = of_match_node(dw_mci_k3_match, pdev->dev.of_node); | |
48 | drv_data = match->data; | |
49 | ||
50 | return dw_mci_pltfm_register(pdev, drv_data); | |
51 | } | |
52 | ||
370aede6 | 53 | #ifdef CONFIG_PM_SLEEP |
036f29d5 ZG |
54 | static int dw_mci_k3_suspend(struct device *dev) |
55 | { | |
56 | struct dw_mci *host = dev_get_drvdata(dev); | |
57 | int ret; | |
58 | ||
59 | ret = dw_mci_suspend(host); | |
60 | if (!ret) | |
61 | clk_disable_unprepare(host->ciu_clk); | |
62 | ||
63 | return ret; | |
64 | } | |
65 | ||
66 | static int dw_mci_k3_resume(struct device *dev) | |
67 | { | |
68 | struct dw_mci *host = dev_get_drvdata(dev); | |
69 | int ret; | |
70 | ||
71 | ret = clk_prepare_enable(host->ciu_clk); | |
72 | if (ret) { | |
73 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
74 | return ret; | |
75 | } | |
76 | ||
77 | return dw_mci_resume(host); | |
78 | } | |
370aede6 | 79 | #endif /* CONFIG_PM_SLEEP */ |
036f29d5 | 80 | |
85136b74 | 81 | static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume); |
036f29d5 ZG |
82 | |
83 | static struct platform_driver dw_mci_k3_pltfm_driver = { | |
84 | .probe = dw_mci_k3_probe, | |
85 | .remove = dw_mci_pltfm_remove, | |
86 | .driver = { | |
87 | .name = "dwmmc_k3", | |
88 | .of_match_table = dw_mci_k3_match, | |
89 | .pm = &dw_mci_k3_pmops, | |
90 | }, | |
91 | }; | |
92 | ||
93 | module_platform_driver(dw_mci_k3_pltfm_driver); | |
94 | ||
95 | MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension"); | |
96 | MODULE_LICENSE("GPL v2"); | |
97 | MODULE_ALIAS("platform:dwmmc-k3"); |