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path: root/drivers/regulator/bd9571mwv-regulator.c
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Diffstat (limited to 'drivers/regulator/bd9571mwv-regulator.c')
-rw-r--r--drivers/regulator/bd9571mwv-regulator.c72
1 files changed, 67 insertions, 5 deletions
diff --git a/drivers/regulator/bd9571mwv-regulator.c b/drivers/regulator/bd9571mwv-regulator.c
index be574eb444eb..274c5ed7cd73 100644
--- a/drivers/regulator/bd9571mwv-regulator.c
+++ b/drivers/regulator/bd9571mwv-regulator.c
@@ -30,6 +30,7 @@ struct bd9571mwv_reg {
/* DDR Backup Power */
u8 bkup_mode_cnt_keepon; /* from "rohm,ddr-backup-power" */
u8 bkup_mode_cnt_saved;
+ bool bkup_mode_enabled;
/* Power switch type */
bool rstbmode_level;
@@ -171,13 +172,60 @@ static int bd9571mwv_bkup_mode_write(struct bd9571mwv *bd, unsigned int mode)
return 0;
}
+static ssize_t backup_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", bdreg->bkup_mode_enabled ? "on" : "off");
+}
+
+static ssize_t backup_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
+ unsigned int mode;
+ int ret;
+
+ if (!count)
+ return 0;
+
+ ret = kstrtobool(buf, &bdreg->bkup_mode_enabled);
+ if (ret)
+ return ret;
+
+ if (!bdreg->rstbmode_level)
+ return count;
+
+ /*
+ * Configure DDR Backup Mode, to change the role of the accessory power
+ * switch from a power switch to a wake-up switch, or vice versa
+ */
+ ret = bd9571mwv_bkup_mode_read(bdreg->bd, &mode);
+ if (ret)
+ return ret;
+
+ mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK;
+ if (bdreg->bkup_mode_enabled)
+ mode |= bdreg->bkup_mode_cnt_keepon;
+
+ ret = bd9571mwv_bkup_mode_write(bdreg->bd, mode);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR_RW(backup_mode);
+
static int bd9571mwv_suspend(struct device *dev)
{
struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
unsigned int mode;
int ret;
- if (!device_may_wakeup(dev))
+ if (!bdreg->bkup_mode_enabled)
return 0;
/* Save DDR Backup Mode */
@@ -204,7 +252,7 @@ static int bd9571mwv_resume(struct device *dev)
{
struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev);
- if (!device_may_wakeup(dev))
+ if (!bdreg->bkup_mode_enabled)
return 0;
/* Restore DDR Backup Mode */
@@ -215,9 +263,15 @@ static const struct dev_pm_ops bd9571mwv_pm = {
SET_SYSTEM_SLEEP_PM_OPS(bd9571mwv_suspend, bd9571mwv_resume)
};
+static int bd9571mwv_regulator_remove(struct platform_device *pdev)
+{
+ device_remove_file(&pdev->dev, &dev_attr_backup_mode);
+ return 0;
+}
#define DEV_PM_OPS &bd9571mwv_pm
#else
#define DEV_PM_OPS NULL
+#define bd9571mwv_regulator_remove NULL
#endif /* CONFIG_PM_SLEEP */
static int bd9571mwv_regulator_probe(struct platform_device *pdev)
@@ -270,14 +324,21 @@ static int bd9571mwv_regulator_probe(struct platform_device *pdev)
return -EINVAL;
}
+#ifdef CONFIG_PM_SLEEP
if (bdreg->bkup_mode_cnt_keepon) {
- device_set_wakeup_capable(&pdev->dev, true);
+ int ret;
+
/*
- * Wakeup is enabled by default in pulse mode, but needs
+ * Backup mode is enabled by default in pulse mode, but needs
* explicit user setup in level mode.
*/
- device_set_wakeup_enable(&pdev->dev, bdreg->rstbmode_pulse);
+ bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse;
+
+ ret = device_create_file(&pdev->dev, &dev_attr_backup_mode);
+ if (ret)
+ return ret;
}
+#endif /* CONFIG_PM_SLEEP */
return 0;
}
@@ -294,6 +355,7 @@ static struct platform_driver bd9571mwv_regulator_driver = {
.pm = DEV_PM_OPS,
},
.probe = bd9571mwv_regulator_probe,
+ .remove = bd9571mwv_regulator_remove,
.id_table = bd9571mwv_regulator_id_table,
};
module_platform_driver(bd9571mwv_regulator_driver);