linux/drivers/regulator/dbx500-prcmu.c
Lee Jones d3cc3dfcc2
regulator: dbx500-prcmu: Remove unused function dbx500_regulator_testcase()
There isn't any code present within the current kernel to
override this 'weak' function.  Besides returning '0', which
is never checked anyway, the whole function appears to be
superfluous.

Consequently fixes W=1 warning:

 drivers/regulator/dbx500-prcmu.c:113:27: warning: no previous prototype for ‘dbx500_regulator_testcase’ [-Wmissing-prototypes]
 113 | int __attribute__((weak)) dbx500_regulator_testcase(
 | ^~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200625163614.4001403-5-lee.jones@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-25 20:11:12 +01:00

172 lines
4.2 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
* Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
*
* UX500 common part of Power domain regulators
*/
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/regulator/driver.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/module.h>
#include "dbx500-prcmu.h"
/*
* power state reference count
*/
static int power_state_active_cnt; /* will initialize to zero */
static DEFINE_SPINLOCK(power_state_active_lock);
void power_state_active_enable(void)
{
unsigned long flags;
spin_lock_irqsave(&power_state_active_lock, flags);
power_state_active_cnt++;
spin_unlock_irqrestore(&power_state_active_lock, flags);
}
int power_state_active_disable(void)
{
int ret = 0;
unsigned long flags;
spin_lock_irqsave(&power_state_active_lock, flags);
if (power_state_active_cnt <= 0) {
pr_err("power state: unbalanced enable/disable calls\n");
ret = -EINVAL;
goto out;
}
power_state_active_cnt--;
out:
spin_unlock_irqrestore(&power_state_active_lock, flags);
return ret;
}
#ifdef CONFIG_REGULATOR_DEBUG
static int power_state_active_get(void)
{
unsigned long flags;
int cnt;
spin_lock_irqsave(&power_state_active_lock, flags);
cnt = power_state_active_cnt;
spin_unlock_irqrestore(&power_state_active_lock, flags);
return cnt;
}
static struct ux500_regulator_debug {
struct dentry *dir;
struct dentry *status_file;
struct dentry *power_state_cnt_file;
struct dbx500_regulator_info *regulator_array;
int num_regulators;
u8 *state_before_suspend;
u8 *state_after_suspend;
} rdebug;
static int ux500_regulator_power_state_cnt_show(struct seq_file *s, void *p)
{
/* print power state count */
seq_printf(s, "ux500-regulator power state count: %i\n",
power_state_active_get());
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ux500_regulator_power_state_cnt);
static int ux500_regulator_status_show(struct seq_file *s, void *p)
{
int i;
/* print dump header */
seq_puts(s, "ux500-regulator status:\n");
seq_printf(s, "%31s : %8s : %8s\n", "current", "before", "after");
for (i = 0; i < rdebug.num_regulators; i++) {
struct dbx500_regulator_info *info;
/* Access per-regulator data */
info = &rdebug.regulator_array[i];
/* print status */
seq_printf(s, "%20s : %8s : %8s : %8s\n",
info->desc.name,
info->is_enabled ? "enabled" : "disabled",
rdebug.state_before_suspend[i] ? "enabled" : "disabled",
rdebug.state_after_suspend[i] ? "enabled" : "disabled");
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ux500_regulator_status);
int
ux500_regulator_debug_init(struct platform_device *pdev,
struct dbx500_regulator_info *regulator_info,
int num_regulators)
{
/* create directory */
rdebug.dir = debugfs_create_dir("ux500-regulator", NULL);
if (!rdebug.dir)
goto exit_no_debugfs;
/* create "status" file */
rdebug.status_file = debugfs_create_file("status",
S_IRUGO, rdebug.dir, &pdev->dev,
&ux500_regulator_status_fops);
if (!rdebug.status_file)
goto exit_destroy_dir;
/* create "power-state-count" file */
rdebug.power_state_cnt_file = debugfs_create_file("power-state-count",
S_IRUGO, rdebug.dir, &pdev->dev,
&ux500_regulator_power_state_cnt_fops);
if (!rdebug.power_state_cnt_file)
goto exit_destroy_status;
rdebug.regulator_array = regulator_info;
rdebug.num_regulators = num_regulators;
rdebug.state_before_suspend = kzalloc(num_regulators, GFP_KERNEL);
if (!rdebug.state_before_suspend)
goto exit_destroy_power_state;
rdebug.state_after_suspend = kzalloc(num_regulators, GFP_KERNEL);
if (!rdebug.state_after_suspend)
goto exit_free;
return 0;
exit_free:
kfree(rdebug.state_before_suspend);
exit_destroy_power_state:
debugfs_remove(rdebug.power_state_cnt_file);
exit_destroy_status:
debugfs_remove(rdebug.status_file);
exit_destroy_dir:
debugfs_remove(rdebug.dir);
exit_no_debugfs:
dev_err(&pdev->dev, "failed to create debugfs entries.\n");
return -ENOMEM;
}
int ux500_regulator_debug_exit(void)
{
debugfs_remove_recursive(rdebug.dir);
kfree(rdebug.state_after_suspend);
kfree(rdebug.state_before_suspend);
return 0;
}
#endif