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mfd: arizona: Support use of external DCVDD

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When the device is used with an external DCVDD supply instead of the
internal LDO1 then an extra step is required when suspending and resuming
the device.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2013-04-23 19:44:16 +01:00
parent d781009ca6
commit 5927467d0c
2 changed files with 45 additions and 0 deletions
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43
drivers/mfd/arizona-core.c
View File

@ -22,6 +22,7 @@
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>
#include <linux/mfd/arizona/core.h>
@ -347,6 +348,17 @@ static int arizona_runtime_resume(struct device *dev)
switch (arizona->type) {
case WM5102:
if (arizona->external_dcvdd) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ISOLATION_CONTROL,
ARIZONA_ISOLATE_DCVDD1, 0);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to connect DCVDD: %d\n", ret);
goto err;
}
}
ret = wm5102_patch(arizona);
if (ret != 0) {
dev_err(arizona->dev, "Failed to apply patch: %d\n",
@ -368,6 +380,16 @@ static int arizona_runtime_resume(struct device *dev)
goto err;
}
if (arizona->external_dcvdd) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ISOLATION_CONTROL,
ARIZONA_ISOLATE_DCVDD1, 0);
if (ret != 0) {
dev_err(arizona->dev,
"Failed to connect DCVDD: %d\n", ret);
goto err;
}
}
break;
}
@ -400,9 +422,22 @@ err:
static int arizona_runtime_suspend(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
int ret;
dev_dbg(arizona->dev, "Entering AoD mode\n");
if (arizona->external_dcvdd) {
ret = regmap_update_bits(arizona->regmap,
ARIZONA_ISOLATION_CONTROL,
ARIZONA_ISOLATE_DCVDD1,
ARIZONA_ISOLATE_DCVDD1);
if (ret != 0) {
dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n",
ret);
return ret;
}
}
regulator_disable(arizona->dcvdd);
regcache_cache_only(arizona->regmap, true);
regcache_mark_dirty(arizona->regmap);
@ -771,6 +806,14 @@ int arizona_dev_init(struct arizona *arizona)
arizona->pdata.gpio_defaults[i]);
}
/*
* LDO1 can only be used to supply DCVDD so if it has no
* consumers then DCVDD is supplied externally.
*/
if (arizona->pdata.ldo1 &&
arizona->pdata.ldo1->num_consumer_supplies == 0)
arizona->external_dcvdd = true;
pm_runtime_set_autosuspend_delay(arizona->dev, 100);
pm_runtime_use_autosuspend(arizona->dev);
pm_runtime_enable(arizona->dev);

2
include/linux/mfd/arizona/core.h
View File

@ -95,6 +95,8 @@ struct arizona {
struct arizona_pdata pdata;
unsigned int external_dcvdd:1;
int irq;
struct irq_domain *virq;
struct regmap_irq_chip_data *aod_irq_chip;