[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mmc / host / sdhci-spear.c

/*
 * drivers/mmc/host/sdhci-spear.c
 *
 * Support of SDHCI platform devices for spear soc family
 *
 * Copyright (C) 2010 ST Microelectronics
 * Viresh Kumar <viresh.linux@gmail.com>
 *
 * Inspired by sdhci-pltfm.c
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdhci-spear.h>
#include <linux/io.h>
#include "sdhci.h"

struct spear_sdhci {
	struct clk *clk;
	struct sdhci_plat_data *data;
};

/* sdhci ops */
static const struct sdhci_ops sdhci_pltfm_ops = {
	/* Nothing to do for now. */
};

/* gpio card detection interrupt handler */
static irqreturn_t sdhci_gpio_irq(int irq, void *dev_id)
{
	struct platform_device *pdev = dev_id;
	struct sdhci_host *host = platform_get_drvdata(pdev);
	struct spear_sdhci *sdhci = dev_get_platdata(&pdev->dev);
	unsigned long gpio_irq_type;
	int val;

	val = gpio_get_value(sdhci->data->card_int_gpio);

	/* val == 1 -> card removed, val == 0 -> card inserted */
	/* if card removed - set irq for low level, else vice versa */
	gpio_irq_type = val ? IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH;
	irq_set_irq_type(irq, gpio_irq_type);

	if (sdhci->data->card_power_gpio >= 0) {
		if (!sdhci->data->power_always_enb) {
			/* if card inserted, give power, otherwise remove it */
			val = sdhci->data->power_active_high ? !val : val ;
			gpio_set_value(sdhci->data->card_power_gpio, val);
		}
	}

	/* inform sdhci driver about card insertion/removal */
	tasklet_schedule(&host->card_tasklet);

	return IRQ_HANDLED;
}

#ifdef CONFIG_OF
static struct sdhci_plat_data *sdhci_probe_config_dt(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct sdhci_plat_data *pdata = NULL;
	int cd_gpio;

	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
	if (!gpio_is_valid(cd_gpio))
		cd_gpio = -1;

	/* If pdata is required */
	if (cd_gpio != -1) {
		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata) {
			dev_err(&pdev->dev, "DT: kzalloc failed\n");
			return ERR_PTR(-ENOMEM);
		}
	}

	pdata->card_int_gpio = cd_gpio;

	return pdata;
}
#else
static struct sdhci_plat_data *sdhci_probe_config_dt(struct platform_device *pdev)
{
	return ERR_PTR(-ENOSYS);
}
#endif

static int sdhci_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct sdhci_host *host;
	struct resource *iomem;
	struct spear_sdhci *sdhci;
	int ret;

	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iomem) {
		ret = -ENOMEM;
		dev_dbg(&pdev->dev, "memory resource not defined\n");
		goto err;
	}

	if (!devm_request_mem_region(&pdev->dev, iomem->start,
				resource_size(iomem), "spear-sdhci")) {
		ret = -EBUSY;
		dev_dbg(&pdev->dev, "cannot request region\n");
		goto err;
	}

	sdhci = devm_kzalloc(&pdev->dev, sizeof(*sdhci), GFP_KERNEL);
	if (!sdhci) {
		ret = -ENOMEM;
		dev_dbg(&pdev->dev, "cannot allocate memory for sdhci\n");
		goto err;
	}

	/* clk enable */
	sdhci->clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(sdhci->clk)) {
		ret = PTR_ERR(sdhci->clk);
		dev_dbg(&pdev->dev, "Error getting clock\n");
		goto err;
	}

	ret = clk_prepare_enable(sdhci->clk);
	if (ret) {
		dev_dbg(&pdev->dev, "Error enabling clock\n");
		goto put_clk;
	}

	ret = clk_set_rate(sdhci->clk, 50000000);
	if (ret)
		dev_dbg(&pdev->dev, "Error setting desired clk, clk=%lu\n",
				clk_get_rate(sdhci->clk));

	if (np) {
		sdhci->data = sdhci_probe_config_dt(pdev);
		if (IS_ERR(sdhci->data)) {
			dev_err(&pdev->dev, "DT: Failed to get pdata\n");
			return -ENODEV;
		}
	} else {
		sdhci->data = dev_get_platdata(&pdev->dev);
	}

	pdev->dev.platform_data = sdhci;

	if (pdev->dev.parent)
		host = sdhci_alloc_host(pdev->dev.parent, 0);
	else
		host = sdhci_alloc_host(&pdev->dev, 0);

	if (IS_ERR(host)) {
		ret = PTR_ERR(host);
		dev_dbg(&pdev->dev, "error allocating host\n");
		goto disable_clk;
	}

	host->hw_name = "sdhci";
	host->ops = &sdhci_pltfm_ops;
	host->irq = platform_get_irq(pdev, 0);
	host->quirks = SDHCI_QUIRK_BROKEN_ADMA;

	host->ioaddr = devm_ioremap(&pdev->dev, iomem->start,
			resource_size(iomem));
	if (!host->ioaddr) {
		ret = -ENOMEM;
		dev_dbg(&pdev->dev, "failed to remap registers\n");
		goto free_host;
	}

	ret = sdhci_add_host(host);
	if (ret) {
		dev_dbg(&pdev->dev, "error adding host\n");
		goto free_host;
	}

	platform_set_drvdata(pdev, host);

	/*
	 * It is optional to use GPIOs for sdhci Power control & sdhci card
	 * interrupt detection. If sdhci->data is NULL, then use original sdhci
	 * lines otherwise GPIO lines.
	 * If GPIO is selected for power control, then power should be disabled
	 * after card removal and should be enabled when card insertion
	 * interrupt occurs
	 */
	if (!sdhci->data)
		return 0;

	if (sdhci->data->card_power_gpio >= 0) {
		int val = 0;

		ret = devm_gpio_request(&pdev->dev,
				sdhci->data->card_power_gpio, "sdhci");
		if (ret < 0) {
			dev_dbg(&pdev->dev, "gpio request fail: %d\n",
					sdhci->data->card_power_gpio);
			goto set_drvdata;
		}

		if (sdhci->data->power_always_enb)
			val = sdhci->data->power_active_high;
		else
			val = !sdhci->data->power_active_high;

		ret = gpio_direction_output(sdhci->data->card_power_gpio, val);
		if (ret) {
			dev_dbg(&pdev->dev, "gpio set direction fail: %d\n",
					sdhci->data->card_power_gpio);
			goto set_drvdata;
		}
	}

	if (sdhci->data->card_int_gpio >= 0) {
		ret = devm_gpio_request(&pdev->dev, sdhci->data->card_int_gpio,
				"sdhci");
		if (ret < 0) {
			dev_dbg(&pdev->dev, "gpio request fail: %d\n",
					sdhci->data->card_int_gpio);
			goto set_drvdata;
		}

		ret = gpio_direction_input(sdhci->data->card_int_gpio);
		if (ret) {
			dev_dbg(&pdev->dev, "gpio set direction fail: %d\n",
					sdhci->data->card_int_gpio);
			goto set_drvdata;
		}
		ret = devm_request_irq(&pdev->dev,
				gpio_to_irq(sdhci->data->card_int_gpio),
				sdhci_gpio_irq, IRQF_TRIGGER_LOW,
				mmc_hostname(host->mmc), pdev);
		if (ret) {
			dev_dbg(&pdev->dev, "gpio request irq fail: %d\n",
					sdhci->data->card_int_gpio);
			goto set_drvdata;
		}

	}

	return 0;

set_drvdata:
	platform_set_drvdata(pdev, NULL);
	sdhci_remove_host(host, 1);
free_host:
	sdhci_free_host(host);
disable_clk:
	clk_disable_unprepare(sdhci->clk);
put_clk:
	clk_put(sdhci->clk);
err:
	dev_err(&pdev->dev, "spear-sdhci probe failed: %d\n", ret);
	return ret;
}

static int sdhci_remove(struct platform_device *pdev)
{
	struct sdhci_host *host = platform_get_drvdata(pdev);
	struct spear_sdhci *sdhci = dev_get_platdata(&pdev->dev);
	int dead = 0;
	u32 scratch;

	platform_set_drvdata(pdev, NULL);
	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	if (scratch == (u32)-1)
		dead = 1;

	sdhci_remove_host(host, dead);
	sdhci_free_host(host);
	clk_disable_unprepare(sdhci->clk);
	clk_put(sdhci->clk);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int sdhci_suspend(struct device *dev)
{
	struct sdhci_host *host = dev_get_drvdata(dev);
	struct spear_sdhci *sdhci = dev_get_platdata(dev);
	int ret;

	ret = sdhci_suspend_host(host);
	if (!ret)
		clk_disable(sdhci->clk);

	return ret;
}

static int sdhci_resume(struct device *dev)
{
	struct sdhci_host *host = dev_get_drvdata(dev);
	struct spear_sdhci *sdhci = dev_get_platdata(dev);
	int ret;

	ret = clk_enable(sdhci->clk);
	if (ret) {
		dev_dbg(dev, "Resume: Error enabling clock\n");
		return ret;
	}

	return sdhci_resume_host(host);
}
#endif

static SIMPLE_DEV_PM_OPS(sdhci_pm_ops, sdhci_suspend, sdhci_resume);

#ifdef CONFIG_OF
static const struct of_device_id sdhci_spear_id_table[] = {
	{ .compatible = "st,spear300-sdhci" },
	{}
};
MODULE_DEVICE_TABLE(of, sdhci_spear_id_table);
#endif

static struct platform_driver sdhci_driver = {
	.driver = {
		.name	= "sdhci",
		.owner	= THIS_MODULE,
		.pm	= &sdhci_pm_ops,
		.of_match_table = of_match_ptr(sdhci_spear_id_table),
	},
	.probe		= sdhci_probe,
	.remove		= sdhci_remove,
};

module_platform_driver(sdhci_driver);

MODULE_DESCRIPTION("SPEAr Secure Digital Host Controller Interface driver");
MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
c63b3cba VK	1	/*
	2	* drivers/mmc/host/sdhci-spear.c
	3	*
	4	* Support of SDHCI platform devices for spear soc family
	5	*
	6	* Copyright (C) 2010 ST Microelectronics
10d8935f	7	* Viresh Kumar <viresh.linux@gmail.com>
c63b3cba VK	8	*
	9	* Inspired by sdhci-pltfm.c
	10	*
	11	* This file is licensed under the terms of the GNU General Public
	12	* License version 2. This program is licensed "as is" without any
	13	* warranty of any kind, whether express or implied.
	14	*/
	15
	16	#include <linux/clk.h>
	17	#include <linux/delay.h>
	18	#include <linux/gpio.h>
	19	#include <linux/highmem.h>
88b47679	20	#include <linux/module.h>
c63b3cba VK	21	#include <linux/interrupt.h>
c63b3cba VK	22	#include <linux/irq.h>
067bf748 VK	23	#include <linux/of.h>
067bf748 VK	24	#include <linux/of_gpio.h>
c63b3cba	25	#include <linux/platform_device.h>
b70a7fab	26	#include <linux/pm.h>
c63b3cba VK	27	#include <linux/slab.h>
	28	#include <linux/mmc/host.h>
	29	#include <linux/mmc/sdhci-spear.h>
	30	#include <linux/io.h>
	31	#include "sdhci.h"
	32
	33	struct spear_sdhci {
	34	struct clk *clk;
	35	struct sdhci_plat_data *data;
	36	};
	37
	38	/* sdhci ops */
c915568d	39	static const struct sdhci_ops sdhci_pltfm_ops = {
c63b3cba VK	40	/* Nothing to do for now. */
	41	};
	42
	43	/* gpio card detection interrupt handler */
	44	static irqreturn_t sdhci_gpio_irq(int irq, void *dev_id)
	45	{
	46	struct platform_device *pdev = dev_id;
	47	struct sdhci_host *host = platform_get_drvdata(pdev);
	48	struct spear_sdhci *sdhci = dev_get_platdata(&pdev->dev);
	49	unsigned long gpio_irq_type;
	50	int val;
	51
	52	val = gpio_get_value(sdhci->data->card_int_gpio);
	53
	54	/* val == 1 -> card removed, val == 0 -> card inserted */
	55	/* if card removed - set irq for low level, else vice versa */
	56	gpio_irq_type = val ? IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH;
dced35ae	57	irq_set_irq_type(irq, gpio_irq_type);
c63b3cba VK	58
	59	if (sdhci->data->card_power_gpio >= 0) {
	60	if (!sdhci->data->power_always_enb) {
	61	/* if card inserted, give power, otherwise remove it */
	62	val = sdhci->data->power_active_high ? !val : val ;
	63	gpio_set_value(sdhci->data->card_power_gpio, val);
	64	}
	65	}
	66
	67	/* inform sdhci driver about card insertion/removal */
	68	tasklet_schedule(&host->card_tasklet);
	69
	70	return IRQ_HANDLED;
	71	}
	72
067bf748	73	#ifdef CONFIG_OF
c3be1efd	74	static struct sdhci_plat_data sdhci_probe_config_dt(struct platform_device pdev)
067bf748 VK	75	{
	76	struct device_node *np = pdev->dev.of_node;
	77	struct sdhci_plat_data *pdata = NULL;
	78	int cd_gpio;
	79
	80	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
	81	if (!gpio_is_valid(cd_gpio))
	82	cd_gpio = -1;
	83
	84	/* If pdata is required */
	85	if (cd_gpio != -1) {
	86	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	87	if (!pdata) {
	88	dev_err(&pdev->dev, "DT: kzalloc failed\n");
	89	return ERR_PTR(-ENOMEM);
	90	}
	91	}
	92
	93	pdata->card_int_gpio = cd_gpio;
	94
	95	return pdata;
	96	}
	97	#else
c3be1efd	98	static struct sdhci_plat_data sdhci_probe_config_dt(struct platform_device pdev)
067bf748 VK	99	{
	100	return ERR_PTR(-ENOSYS);
	101	}
	102	#endif
	103
c3be1efd	104	static int sdhci_probe(struct platform_device *pdev)
c63b3cba	105	{
067bf748	106	struct device_node *np = pdev->dev.of_node;
c63b3cba VK	107	struct sdhci_host *host;
	108	struct resource *iomem;
	109	struct spear_sdhci *sdhci;
	110	int ret;
	111
c63b3cba VK	112	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	113	if (!iomem) {
	114	ret = -ENOMEM;
	115	dev_dbg(&pdev->dev, "memory resource not defined\n");
	116	goto err;
	117	}
	118
6ebaf8f2 VK	119	if (!devm_request_mem_region(&pdev->dev, iomem->start,
6ebaf8f2 VK	120	resource_size(iomem), "spear-sdhci")) {
c63b3cba VK	121	ret = -EBUSY;
	122	dev_dbg(&pdev->dev, "cannot request region\n");
	123	goto err;
	124	}
	125
6ebaf8f2	126	sdhci = devm_kzalloc(&pdev->dev, sizeof(*sdhci), GFP_KERNEL);
c63b3cba VK	127	if (!sdhci) {
	128	ret = -ENOMEM;
	129	dev_dbg(&pdev->dev, "cannot allocate memory for sdhci\n");
6ebaf8f2	130	goto err;
c63b3cba VK	131	}
	132
	133	/* clk enable */
	134	sdhci->clk = clk_get(&pdev->dev, NULL);
	135	if (IS_ERR(sdhci->clk)) {
	136	ret = PTR_ERR(sdhci->clk);
	137	dev_dbg(&pdev->dev, "Error getting clock\n");
6ebaf8f2	138	goto err;
c63b3cba VK	139	}
c63b3cba VK	140
da764f97	141	ret = clk_prepare_enable(sdhci->clk);
c63b3cba VK	142	if (ret) {
c63b3cba VK	143	dev_dbg(&pdev->dev, "Error enabling clock\n");
6ebaf8f2	144	goto put_clk;
c63b3cba VK	145	}
c63b3cba VK	146
257f9df1 VKS	147	ret = clk_set_rate(sdhci->clk, 50000000);
	148	if (ret)
	149	dev_dbg(&pdev->dev, "Error setting desired clk, clk=%lu\n",
	150	clk_get_rate(sdhci->clk));
	151
067bf748 VK	152	if (np) {
	153	sdhci->data = sdhci_probe_config_dt(pdev);
	154	if (IS_ERR(sdhci->data)) {
	155	dev_err(&pdev->dev, "DT: Failed to get pdata\n");
	156	return -ENODEV;
	157	}
	158	} else {
	159	sdhci->data = dev_get_platdata(&pdev->dev);
	160	}
	161
c63b3cba VK	162	pdev->dev.platform_data = sdhci;
	163
	164	if (pdev->dev.parent)
	165	host = sdhci_alloc_host(pdev->dev.parent, 0);
	166	else
	167	host = sdhci_alloc_host(&pdev->dev, 0);
	168
	169	if (IS_ERR(host)) {
	170	ret = PTR_ERR(host);
	171	dev_dbg(&pdev->dev, "error allocating host\n");
6ebaf8f2	172	goto disable_clk;
c63b3cba VK	173	}
	174
	175	host->hw_name = "sdhci";
	176	host->ops = &sdhci_pltfm_ops;
	177	host->irq = platform_get_irq(pdev, 0);
	178	host->quirks = SDHCI_QUIRK_BROKEN_ADMA;
	179
6ebaf8f2 VK	180	host->ioaddr = devm_ioremap(&pdev->dev, iomem->start,
6ebaf8f2 VK	181	resource_size(iomem));
c63b3cba VK	182	if (!host->ioaddr) {
	183	ret = -ENOMEM;
	184	dev_dbg(&pdev->dev, "failed to remap registers\n");
6ebaf8f2	185	goto free_host;
c63b3cba VK	186	}
	187
	188	ret = sdhci_add_host(host);
	189	if (ret) {
	190	dev_dbg(&pdev->dev, "error adding host\n");
6ebaf8f2	191	goto free_host;
c63b3cba VK	192	}
	193
	194	platform_set_drvdata(pdev, host);
	195
	196	/*
	197	* It is optional to use GPIOs for sdhci Power control & sdhci card
	198	* interrupt detection. If sdhci->data is NULL, then use original sdhci
	199	* lines otherwise GPIO lines.
	200	* If GPIO is selected for power control, then power should be disabled
	201	* after card removal and should be enabled when card insertion
	202	* interrupt occurs
	203	*/
	204	if (!sdhci->data)
	205	return 0;
	206
	207	if (sdhci->data->card_power_gpio >= 0) {
	208	int val = 0;
	209
6ebaf8f2 VK	210	ret = devm_gpio_request(&pdev->dev,
6ebaf8f2 VK	211	sdhci->data->card_power_gpio, "sdhci");
c63b3cba VK	212	if (ret < 0) {
	213	dev_dbg(&pdev->dev, "gpio request fail: %d\n",
	214	sdhci->data->card_power_gpio);
6ebaf8f2	215	goto set_drvdata;
c63b3cba VK	216	}
	217
	218	if (sdhci->data->power_always_enb)
	219	val = sdhci->data->power_active_high;
	220	else
	221	val = !sdhci->data->power_active_high;
	222
	223	ret = gpio_direction_output(sdhci->data->card_power_gpio, val);
	224	if (ret) {
	225	dev_dbg(&pdev->dev, "gpio set direction fail: %d\n",
	226	sdhci->data->card_power_gpio);
6ebaf8f2	227	goto set_drvdata;
c63b3cba	228	}
c63b3cba VK	229	}
	230
	231	if (sdhci->data->card_int_gpio >= 0) {
6ebaf8f2 VK	232	ret = devm_gpio_request(&pdev->dev, sdhci->data->card_int_gpio,
6ebaf8f2 VK	233	"sdhci");
c63b3cba VK	234	if (ret < 0) {
	235	dev_dbg(&pdev->dev, "gpio request fail: %d\n",
	236	sdhci->data->card_int_gpio);
6ebaf8f2	237	goto set_drvdata;
c63b3cba VK	238	}
	239
	240	ret = gpio_direction_input(sdhci->data->card_int_gpio);
	241	if (ret) {
	242	dev_dbg(&pdev->dev, "gpio set direction fail: %d\n",
	243	sdhci->data->card_int_gpio);
6ebaf8f2	244	goto set_drvdata;
c63b3cba	245	}
6ebaf8f2 VK	246	ret = devm_request_irq(&pdev->dev,
6ebaf8f2 VK	247	gpio_to_irq(sdhci->data->card_int_gpio),
c63b3cba VK	248	sdhci_gpio_irq, IRQF_TRIGGER_LOW,
	249	mmc_hostname(host->mmc), pdev);
	250	if (ret) {
	251	dev_dbg(&pdev->dev, "gpio request irq fail: %d\n",
	252	sdhci->data->card_int_gpio);
6ebaf8f2	253	goto set_drvdata;
c63b3cba VK	254	}
	255
	256	}
	257
	258	return 0;
	259
6ebaf8f2	260	set_drvdata:
c63b3cba VK	261	platform_set_drvdata(pdev, NULL);
c63b3cba VK	262	sdhci_remove_host(host, 1);
6ebaf8f2	263	free_host:
c63b3cba	264	sdhci_free_host(host);
6ebaf8f2	265	disable_clk:
da764f97	266	clk_disable_unprepare(sdhci->clk);
6ebaf8f2	267	put_clk:
c63b3cba	268	clk_put(sdhci->clk);
c63b3cba VK	269	err:
	270	dev_err(&pdev->dev, "spear-sdhci probe failed: %d\n", ret);
	271	return ret;
	272	}
	273
6e0ee714	274	static int sdhci_remove(struct platform_device *pdev)
c63b3cba VK	275	{
c63b3cba VK	276	struct sdhci_host *host = platform_get_drvdata(pdev);
c63b3cba	277	struct spear_sdhci *sdhci = dev_get_platdata(&pdev->dev);
6ebaf8f2	278	int dead = 0;
c63b3cba VK	279	u32 scratch;
c63b3cba VK	280
c63b3cba	281	platform_set_drvdata(pdev, NULL);
c63b3cba VK	282	scratch = readl(host->ioaddr + SDHCI_INT_STATUS);
	283	if (scratch == (u32)-1)
	284	dead = 1;
	285
	286	sdhci_remove_host(host, dead);
c63b3cba	287	sdhci_free_host(host);
da764f97	288	clk_disable_unprepare(sdhci->clk);
c63b3cba	289	clk_put(sdhci->clk);
c63b3cba VK	290
	291	return 0;
	292	}
	293
b0dd099c	294	#ifdef CONFIG_PM_SLEEP
b70a7fab VK	295	static int sdhci_suspend(struct device *dev)
	296	{
	297	struct sdhci_host *host = dev_get_drvdata(dev);
	298	struct spear_sdhci *sdhci = dev_get_platdata(dev);
b70a7fab VK	299	int ret;
b70a7fab VK	300
984589e5	301	ret = sdhci_suspend_host(host);
b70a7fab	302	if (!ret)
06960a1b	303	clk_disable(sdhci->clk);
b70a7fab VK	304
	305	return ret;
	306	}
	307
	308	static int sdhci_resume(struct device *dev)
	309	{
	310	struct sdhci_host *host = dev_get_drvdata(dev);
	311	struct spear_sdhci *sdhci = dev_get_platdata(dev);
	312	int ret;
	313
06960a1b	314	ret = clk_enable(sdhci->clk);
b70a7fab VK	315	if (ret) {
	316	dev_dbg(dev, "Resume: Error enabling clock\n");
	317	return ret;
	318	}
	319
	320	return sdhci_resume_host(host);
	321	}
b70a7fab VK	322	#endif
b70a7fab VK	323
4b1a6170 SH	324	static SIMPLE_DEV_PM_OPS(sdhci_pm_ops, sdhci_suspend, sdhci_resume);
4b1a6170 SH	325
067bf748 VK	326	#ifdef CONFIG_OF
	327	static const struct of_device_id sdhci_spear_id_table[] = {
	328	{ .compatible = "st,spear300-sdhci" },
	329	{}
	330	};
	331	MODULE_DEVICE_TABLE(of, sdhci_spear_id_table);
	332	#endif
	333
c63b3cba VK	334	static struct platform_driver sdhci_driver = {
	335	.driver = {
	336	.name = "sdhci",
	337	.owner = THIS_MODULE,
b70a7fab	338	.pm = &sdhci_pm_ops,
067bf748	339	.of_match_table = of_match_ptr(sdhci_spear_id_table),
c63b3cba VK	340	},
c63b3cba VK	341	.probe = sdhci_probe,
0433c143	342	.remove = sdhci_remove,
c63b3cba VK	343	};
c63b3cba VK	344
d1f81a64	345	module_platform_driver(sdhci_driver);
c63b3cba VK	346
c63b3cba VK	347	MODULE_DESCRIPTION("SPEAr Secure Digital Host Controller Interface driver");
10d8935f	348	MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
c63b3cba	349	MODULE_LICENSE("GPL v2");