98 lines
3.1 KiB
Diff
98 lines
3.1 KiB
Diff
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From e07c1d516c1a7842510d22a7cf88666d500a9a9a Mon Sep 17 00:00:00 2001
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From: Samuel Holland <samuel@sholland.org>
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Date: Sun, 22 Aug 2021 21:35:45 -0500
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Subject: [PATCH 05/90] power: regulator: Add a driver for the AXP USB power
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supply
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This driver reports the presence/absence of voltage on the PMIC's USB
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VBUS pin. This information is used by the USB PHY driver. The
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corresponding Linux driver uses the power supply class, which does not
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exist in U-Boot. UCLASS_REGULATOR seems to be the closest match.
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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drivers/power/regulator/Kconfig | 7 ++++
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drivers/power/regulator/Makefile | 1 +
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drivers/power/regulator/axp_usb_power.c | 49 +++++++++++++++++++++++++
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3 files changed, 57 insertions(+)
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create mode 100644 drivers/power/regulator/axp_usb_power.c
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--- a/drivers/power/regulator/Kconfig
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+++ b/drivers/power/regulator/Kconfig
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@@ -43,6 +43,13 @@ config REGULATOR_AS3722
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but does not yet support change voltages. Currently this must be
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done using direct register writes to the PMIC.
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+config REGULATOR_AXP_USB_POWER
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+ bool "Enable driver for X-Powers AXP PMIC USB power supply"
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+ depends on DM_REGULATOR && PMIC_AXP
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+ help
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+ Enable support for reading the USB power supply status from
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+ X-Powers AXP2xx and AXP8xx PMICs.
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+
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config DM_REGULATOR_BD71837
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bool "Enable Driver Model for ROHM BD71837/BD71847 regulators"
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depends on DM_REGULATOR && DM_PMIC_BD71837
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--- a/drivers/power/regulator/Makefile
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+++ b/drivers/power/regulator/Makefile
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@@ -7,6 +7,7 @@
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obj-$(CONFIG_$(SPL_)DM_REGULATOR) += regulator-uclass.o
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obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o
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obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o
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+obj-$(CONFIG_$(SPL_)REGULATOR_AXP_USB_POWER) += axp_usb_power.o
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obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.o
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obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o
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obj-$(CONFIG_DM_REGULATOR_NPCM8XX) += npcm8xx_regulator.o
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--- /dev/null
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+++ b/drivers/power/regulator/axp_usb_power.c
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@@ -0,0 +1,49 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+
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+#include <dm/device.h>
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+#include <errno.h>
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+#include <power/pmic.h>
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+#include <power/regulator.h>
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+
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+#define AXP_POWER_STATUS 0x00
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+#define AXP_POWER_STATUS_VBUS_PRESENT BIT(5)
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+
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+static int axp_usb_power_get_enable(struct udevice *dev)
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+{
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+ int ret;
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+
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+ ret = pmic_reg_read(dev->parent, AXP_POWER_STATUS);
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+ if (ret < 0)
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+ return ret;
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+
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+ return !!(ret & AXP_POWER_STATUS_VBUS_PRESENT);
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+}
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+
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+static const struct dm_regulator_ops axp_usb_power_ops = {
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+ .get_enable = axp_usb_power_get_enable,
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+};
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+
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+static int axp_usb_power_probe(struct udevice *dev)
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+{
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+ struct dm_regulator_uclass_plat *uc_plat = dev_get_uclass_plat(dev);
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+
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+ uc_plat->type = REGULATOR_TYPE_FIXED;
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+
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+ return 0;
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+}
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+
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+static const struct udevice_id axp_usb_power_ids[] = {
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+ { .compatible = "x-powers,axp202-usb-power-supply" },
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+ { .compatible = "x-powers,axp221-usb-power-supply" },
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+ { .compatible = "x-powers,axp223-usb-power-supply" },
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+ { .compatible = "x-powers,axp813-usb-power-supply" },
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+ { }
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+};
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+
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+U_BOOT_DRIVER(axp_usb_power) = {
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+ .name = "axp_usb_power",
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+ .id = UCLASS_REGULATOR,
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+ .of_match = axp_usb_power_ids,
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+ .probe = axp_usb_power_probe,
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+ .ops = &axp_usb_power_ops,
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+};
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