Release 4.7 drivers/mmc/core/pwrseq.c

/*
 *  Copyright (C) 2014 Linaro Ltd
 *
 * Author: Ulf Hansson <ulf.hansson@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 *
 *  MMC power sequence management
 */
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>

#include <linux/mmc/host.h>

#include "pwrseq.h"

static DEFINE_MUTEX(pwrseq_list_mutex);
static LIST_HEAD(pwrseq_list);



int mmc_pwrseq_alloc(struct mmc_host *host)
{
	struct device_node *np;
	struct mmc_pwrseq *p;

	np = of_parse_phandle(host->parent->of_node, "mmc-pwrseq", 0);
	if (!np)
		return 0;

	mutex_lock(&pwrseq_list_mutex);
	list_for_each_entry(p, &pwrseq_list, pwrseq_node) {
		if (p->dev->of_node == np) {
			if (!try_module_get(p->owner))
				dev_err(host->parent,
					"increasing module refcount failed\n");
			else
				host->pwrseq = p;

			break;
		}
	}

	of_node_put(np);
	mutex_unlock(&pwrseq_list_mutex);

	if (!host->pwrseq)
		return -EPROBE_DEFER;

	dev_info(host->parent, "allocated mmc-pwrseq\n");

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
69
52.27%
2
50.00%
srinivas kandagatla
srinivas kandagatla
53
40.15%
1
25.00%
alexandre courbot
alexandre courbot
10
7.58%
1
25.00%
Total
132
100.00%
4
100.00%



void mmc_pwrseq_pre_power_on(struct mmc_host *host)
{
	struct mmc_pwrseq *pwrseq = host->pwrseq;

	if (pwrseq && pwrseq->ops->pre_power_on)
		pwrseq->ops->pre_power_on(host);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
38
100.00%
1
100.00%
Total
38
100.00%
1
100.00%



void mmc_pwrseq_post_power_on(struct mmc_host *host)
{
	struct mmc_pwrseq *pwrseq = host->pwrseq;

	if (pwrseq && pwrseq->ops->post_power_on)
		pwrseq->ops->post_power_on(host);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
38
100.00%
1
100.00%
Total
38
100.00%
1
100.00%



void mmc_pwrseq_power_off(struct mmc_host *host)
{
	struct mmc_pwrseq *pwrseq = host->pwrseq;

	if (pwrseq && pwrseq->ops->power_off)
		pwrseq->ops->power_off(host);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
38
100.00%
1
100.00%
Total
38
100.00%
1
100.00%



void mmc_pwrseq_free(struct mmc_host *host)
{
	struct mmc_pwrseq *pwrseq = host->pwrseq;

	if (pwrseq) {
		module_put(pwrseq->owner);
		host->pwrseq = NULL;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
23
60.53%
1
50.00%
srinivas kandagatla
srinivas kandagatla
15
39.47%
1
50.00%
Total
38
100.00%
2
100.00%



int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
{
	if (!pwrseq || !pwrseq->ops || !pwrseq->dev)
		return -EINVAL;

	mutex_lock(&pwrseq_list_mutex);
	list_add(&pwrseq->pwrseq_node, &pwrseq_list);
	mutex_unlock(&pwrseq_list_mutex);

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
srinivas kandagatla
srinivas kandagatla
45
81.82%
1
50.00%
ulf hansson
ulf hansson
10
18.18%
1
50.00%
Total
55
100.00%
2
100.00%


EXPORT_SYMBOL_GPL(mmc_pwrseq_register);



void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq)
{
	if (pwrseq) {
		mutex_lock(&pwrseq_list_mutex);
		list_del(&pwrseq->pwrseq_node);
		mutex_unlock(&pwrseq_list_mutex);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
srinivas kandagatla
srinivas kandagatla
33
91.67%
1
33.33%
alexandre courbot
alexandre courbot
2
5.56%
1
33.33%
ulf hansson
ulf hansson
1
2.78%
1
33.33%
Total
36
100.00%
3
100.00%


EXPORT_SYMBOL_GPL(mmc_pwrseq_unregister);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
ulf hansson
ulf hansson
240
57.69%
2
50.00%
srinivas kandagatla
srinivas kandagatla
164
39.42%
1
25.00%
alexandre courbot
alexandre courbot
12
2.88%
1
25.00%
Total
416
100.00%
4
100.00%
  
Directory: drivers/mmc/core

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.