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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-10 19:14:11 (GMT)
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-13 12:31:02 (GMT)
commite6ed90581bfab234ceeff797e1efbd31d0cec219 (patch)
treec1afd3e0731c64e744a35933a3aa0778d8c4f8a3 /drivers/regulator
parent9931faca02c604c22335f5a935a501bb2ace6e20 (diff)
downloadlinux-fsl-qoriq-e6ed90581bfab234ceeff797e1efbd31d0cec219.tar.xz
regulator: arizona-micsupp: Enable SYSCLK for charge pump
If we are in non-bypass mode then the SYSCLK is required for full charge pump operation, otherwise we will fall back to bypass mode. Use the DAPM context exposed by the ASoC driver to manage this. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/Kconfig1
-rw-r--r--drivers/regulator/arizona-micsupp.c75
2 files changed, 73 insertions, 3 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 551a22b..22b2511 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -91,6 +91,7 @@ config REGULATOR_AAT2870
config REGULATOR_ARIZONA
tristate "Wolfson Arizona class devices"
depends on MFD_ARIZONA
+ depends on SND_SOC
help
Support for the regulators found on Wolfson Arizona class
devices.
diff --git a/drivers/regulator/arizona-micsupp.c b/drivers/regulator/arizona-micsupp.c
index a6d040c..d96cee4 100644
--- a/drivers/regulator/arizona-micsupp.c
+++ b/drivers/regulator/arizona-micsupp.c
@@ -21,6 +21,8 @@
#include <linux/regulator/machine.h>
#include <linux/gpio.h>
#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/soc.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
@@ -34,6 +36,8 @@ struct arizona_micsupp {
struct regulator_consumer_supply supply;
struct regulator_init_data init_data;
+
+ struct work_struct check_cp_work;
};
static int arizona_micsupp_list_voltage(struct regulator_dev *rdev,
@@ -72,9 +76,73 @@ static int arizona_micsupp_map_voltage(struct regulator_dev *rdev,
return selector;
}
+static void arizona_micsupp_check_cp(struct work_struct *work)
+{
+ struct arizona_micsupp *micsupp =
+ container_of(work, struct arizona_micsupp, check_cp_work);
+ struct snd_soc_dapm_context *dapm = micsupp->arizona->dapm;
+ struct arizona *arizona = micsupp->arizona;
+ struct regmap *regmap = arizona->regmap;
+ unsigned int reg;
+ int ret;
+
+ ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, &reg);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
+ return;
+ }
+
+ if (dapm) {
+ if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
+ ARIZONA_CPMIC_ENA)
+ snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
+ else
+ snd_soc_dapm_disable_pin(dapm, "MICSUPP");
+
+ snd_soc_dapm_sync(dapm);
+ }
+}
+
+static int arizona_micsupp_enable(struct regulator_dev *rdev)
+{
+ struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
+ int ret;
+
+ ret = regulator_enable_regmap(rdev);
+
+ if (ret == 0)
+ schedule_work(&micsupp->check_cp_work);
+
+ return ret;
+}
+
+static int arizona_micsupp_disable(struct regulator_dev *rdev)
+{
+ struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
+ int ret;
+
+ ret = regulator_disable_regmap(rdev);
+ if (ret == 0)
+ schedule_work(&micsupp->check_cp_work);
+
+ return ret;
+}
+
+static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
+{
+ struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
+ int ret;
+
+ ret = regulator_set_bypass_regmap(rdev, ena);
+ if (ret == 0)
+ schedule_work(&micsupp->check_cp_work);
+
+ return ret;
+}
+
static struct regulator_ops arizona_micsupp_ops = {
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
+ .enable = arizona_micsupp_enable,
+ .disable = arizona_micsupp_disable,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = arizona_micsupp_list_voltage,
@@ -84,7 +152,7 @@ static struct regulator_ops arizona_micsupp_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_bypass = regulator_get_bypass_regmap,
- .set_bypass = regulator_set_bypass_regmap,
+ .set_bypass = arizona_micsupp_set_bypass,
};
static const struct regulator_desc arizona_micsupp = {
@@ -131,6 +199,7 @@ static int arizona_micsupp_probe(struct platform_device *pdev)
}
micsupp->arizona = arizona;
+ INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
/*
* Since the chip usually supplies itself we provide some