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power: regulator: Add a driver for the AXP PMIC drivevbus

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AXP PMICs have a pin which can either report the USB VBUS state, or
driving a regulator that supplies USB VBUS. Add a regulator driver for
controlling this pin. The selection between input and output is done via
the x-powers,drive-vbus-en pin on the PMIC (parent) node.

Signed-off-by: Samuel Holland <samuel@sholland.org>
This commit is contained in:
Samuel Holland 2021-08-26 21:32:15 -05:00
parent cbba1b7766
commit 967499870f
4 changed files with 66 additions and 0 deletions
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1
drivers/power/pmic/axp.c
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@ -51,6 +51,7 @@ static const struct pmic_child_info axp_pmic_child_info[] = {
{ "cldo", "axp_regulator" },
{ "dc", "axp_regulator" },
{ "dldo", "axp_regulator" },
{ "drivevbus", "axp_drivevbus" },
{ "eldo", "axp_regulator" },
{ "fldo", "axp_regulator" },
{ "ldo", "axp_regulator" },

7
drivers/power/regulator/Kconfig
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@ -57,6 +57,13 @@ config SPL_REGULATOR_AXP
Enable support in SPL for the regulators (DCDCs, LDOs) in the
X-Powers AXP152, AXP2xx, and AXP8xx PMICs.
config REGULATOR_AXP_DRIVEVBUS
bool "Enable driver for X-Powers AXP PMIC drivevbus"
depends on DM_REGULATOR && PMIC_AXP
help
Enable support for sensing or driving the USB VBUS on
X-Powers AXP2xx and AXP8xx PMICs.
config REGULATOR_AXP_USB_POWER
bool "Enable driver for X-Powers AXP PMIC USB power supply"
depends on DM_REGULATOR && PMIC_AXP

1
drivers/power/regulator/Makefile
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@ -8,6 +8,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR) += regulator-uclass.o
obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o
obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o
obj-$(CONFIG_$(SPL_)REGULATOR_AXP) += axp_regulator.o
obj-$(CONFIG_$(SPL_)REGULATOR_AXP_DRIVEVBUS) += axp_drivevbus.o
obj-$(CONFIG_$(SPL_)REGULATOR_AXP_USB_POWER) += axp_usb_power.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.o
obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o

57
drivers/power/regulator/axp_drivevbus.c Normal file
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@ -0,0 +1,57 @@
// SPDX-License-Identifier: GPL-2.0+
#include <dm.h>
#include <power/pmic.h>
#include <power/regulator.h>
#define AXP_VBUS_IPSOUT 0x30
#define AXP_VBUS_IPSOUT_DRIVEBUS BIT(2)
#define AXP_MISC_CTRL 0x8f
#define AXP_MISC_CTRL_N_VBUSEN_FUNC BIT(4)
static int axp_drivevbus_get_enable(struct udevice *dev)
{
int ret;
ret = pmic_reg_read(dev->parent, AXP_VBUS_IPSOUT);
if (ret < 0)
return ret;
return !!(ret & AXP_VBUS_IPSOUT_DRIVEBUS);
}
static int axp_drivevbus_set_enable(struct udevice *dev, bool enable)
{
return pmic_clrsetbits(dev->parent, AXP_VBUS_IPSOUT,
AXP_VBUS_IPSOUT_DRIVEBUS,
enable ? AXP_VBUS_IPSOUT_DRIVEBUS : 0);
}
static const struct dm_regulator_ops axp_drivevbus_ops = {
.get_enable = axp_drivevbus_get_enable,
.set_enable = axp_drivevbus_set_enable,
};
static int axp_drivevbus_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_plat = dev_get_uclass_plat(dev);
int ret;
uc_plat->type = REGULATOR_TYPE_FIXED;
if (dev_read_bool(dev->parent, "x-powers,drive-vbus-en")) {
ret = pmic_clrsetbits(dev->parent, AXP_MISC_CTRL,
AXP_MISC_CTRL_N_VBUSEN_FUNC, 0);
if (ret)
return ret;
}
return 0;
}
U_BOOT_DRIVER(axp_drivevbus) = {
.name = "axp_drivevbus",
.id = UCLASS_REGULATOR,
.probe = axp_drivevbus_probe,
.ops = &axp_drivevbus_ops,
};