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power: supply: qcom_smbb: Add otg regulator for control of vbus

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Add a regulator to control the OTG chargepath switch.  This
is used by USB code to control VBUS direction - out for host mode
on the OTG port, and in for charging mode.

Signed-off-by: Tim Bird <tim.bird@sonymobile.com>
Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
[stephen.boyd@linaro.org: Fix supply name, constify ops, drop
machine.h and of_regulator.h includes]
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Bird, Tim 2016-10-17 17:42:51 -07:00 committed by Sebastian Reichel
parent 3a3e116473
commit 61274eff0d
1 changed files with 70 additions and 0 deletions
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70
drivers/power/supply/qcom_smbb.c
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@ -35,6 +35,7 @@
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/extcon.h>
#include <linux/regulator/driver.h>
#define SMBB_CHG_VMAX 0x040
#define SMBB_CHG_VSAFE 0x041
@ -72,6 +73,8 @@
#define BTC_CTRL_HOT_EXT_N BIT(0)
#define SMBB_USB_IMAX 0x344
#define SMBB_USB_OTG_CTL 0x348
#define OTG_CTL_EN BIT(0)
#define SMBB_USB_ENUM_TIMER_STOP 0x34e
#define ENUM_TIMER_STOP BIT(0)
#define SMBB_USB_SEC_ACCESS 0x3d0
@ -125,6 +128,9 @@ struct smbb_charger {
struct power_supply *dc_psy;
struct power_supply *bat_psy;
struct regmap *regmap;
struct regulator_desc otg_rdesc;
struct regulator_dev *otg_reg;
};
static const unsigned int smbb_usb_extcon_cable[] = {
@ -787,12 +793,56 @@ static const struct power_supply_desc dc_psy_desc = {
.property_is_writeable = smbb_charger_writable_property,
};
static int smbb_chg_otg_enable(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
int rc;
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
OTG_CTL_EN, OTG_CTL_EN);
if (rc)
dev_err(chg->dev, "failed to update OTG_CTL\n");
return rc;
}
static int smbb_chg_otg_disable(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
int rc;
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
OTG_CTL_EN, 0);
if (rc)
dev_err(chg->dev, "failed to update OTG_CTL\n");
return rc;
}
static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev)
{
struct smbb_charger *chg = rdev_get_drvdata(rdev);
unsigned int value = 0;
int rc;
rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value);
if (rc)
dev_err(chg->dev, "failed to read OTG_CTL\n");
return !!(value & OTG_CTL_EN);
}
static const struct regulator_ops smbb_chg_otg_ops = {
.enable = smbb_chg_otg_enable,
.disable = smbb_chg_otg_disable,
.is_enabled = smbb_chg_otg_is_enabled,
};
static int smbb_charger_probe(struct platform_device *pdev)
{
struct power_supply_config bat_cfg = {};
struct power_supply_config usb_cfg = {};
struct power_supply_config dc_cfg = {};
struct smbb_charger *chg;
struct regulator_config config = { };
int rc, i;
chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
@ -905,6 +955,26 @@ static int smbb_charger_probe(struct platform_device *pdev)
}
}
/*
* otg regulator is used to control VBUS voltage direction
* when USB switches between host and gadget mode
*/
chg->otg_rdesc.id = -1;
chg->otg_rdesc.name = "otg-vbus";
chg->otg_rdesc.ops = &smbb_chg_otg_ops;
chg->otg_rdesc.owner = THIS_MODULE;
chg->otg_rdesc.type = REGULATOR_VOLTAGE;
chg->otg_rdesc.supply_name = "usb-otg-in";
chg->otg_rdesc.of_match = "otg-vbus";
config.dev = &pdev->dev;
config.driver_data = chg;
chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc,
&config);
if (IS_ERR(chg->otg_reg))
return PTR_ERR(chg->otg_reg);
chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node,
"qcom,jeita-extended-temp-range");