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 <sam...@sholland.org>
---
drivers/power/pmic/axp.c | 1 +
drivers/power/regulator/Kconfig | 7 +++
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/axp_drivevbus.c | 57 +++++++++++++++++++++++++
4 files changed, 66 insertions(+)
create mode 100644 drivers/power/regulator/axp_drivevbus.c
diff --git a/drivers/power/pmic/axp.c b/drivers/power/pmic/axp.c
index 025dac24f28..e9d34c7d38f 100644
--- a/drivers/power/pmic/axp.c
+++ b/drivers/power/pmic/axp.c
@@ -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" },
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index eb5aa38c1cc..4fe75cda8fc 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -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
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index d9e0cd5949c..8e59056124f 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -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
diff --git a/drivers/power/regulator/axp_drivevbus.c
b/drivers/power/regulator/axp_drivevbus.c
new file mode 100644
index 00000000000..c463de8786b
--- /dev/null
+++ b/drivers/power/regulator/axp_drivevbus.c
@@ -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,
+};
--
2.41.0
