tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
21static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
22{
23 int ret;
24
25 ret = clk_set_rate(host->ciu_clk, ios->clock);
26 if (ret)
27 dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
28
29 host->bus_hz = clk_get_rate(host->ciu_clk);
30}
31
32static const struct dw_mci_drv_data k3_drv_data = {
33 .set_ios = dw_mci_k3_set_ios,
34};
35
36static const struct of_device_id dw_mci_k3_match[] = {
37 { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
38 {},
39};
40MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
41
42static 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
53static int dw_mci_k3_suspend(struct device *dev)
54{
55 struct dw_mci *host = dev_get_drvdata(dev);
56 int ret;
57
58 ret = dw_mci_suspend(host);
59 if (!ret)
60 clk_disable_unprepare(host->ciu_clk);
61
62 return ret;
63}
64
65static int dw_mci_k3_resume(struct device *dev)
66{
67 struct dw_mci *host = dev_get_drvdata(dev);
68 int ret;
69
70 ret = clk_prepare_enable(host->ciu_clk);
71 if (ret) {
72 dev_err(host->dev, "failed to enable ciu clock\n");
73 return ret;
74 }
75
76 return dw_mci_resume(host);
77}
78
79static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
80
81static struct platform_driver dw_mci_k3_pltfm_driver = {
82 .probe = dw_mci_k3_probe,
83 .remove = dw_mci_pltfm_remove,
84 .driver = {
85 .name = "dwmmc_k3",
86 .of_match_table = dw_mci_k3_match,
87 .pm = &dw_mci_k3_pmops,
88 },
89};
90
91module_platform_driver(dw_mci_k3_pltfm_driver);
92
93MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
94MODULE_LICENSE("GPL v2");
95MODULE_ALIAS("platform:dwmmc-k3");