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
53#ifdef CONFIG_PM_SLEEP
54static 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
66static 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}
79#endif /* CONFIG_PM_SLEEP */
80
81static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
82
83static 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
93module_platform_driver(dw_mci_k3_pltfm_driver);
94
95MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
96MODULE_LICENSE("GPL v2");
97MODULE_ALIAS("platform:dwmmc-k3");
98