This pmic includes regulators which should have their own driver. Add a driver to support these.
Signed-off-by: Simon Glass sjg@chromium.org Reviewed-by: Lukasz Majewski lukma@denx.de ---
Changes in v4: None Changes in v3: None Changes in v2: None
drivers/power/regulator/Kconfig | 9 ++ drivers/power/regulator/Makefile | 1 + drivers/power/regulator/as3722_regulator.c | 149 +++++++++++++++++++++++++++++ include/power/as3722.h | 8 ++ 4 files changed, 167 insertions(+) create mode 100644 drivers/power/regulator/as3722_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index f2134874c2..c82a936e8a 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -34,6 +34,15 @@ config REGULATOR_ACT8846 by the PMIC device. This driver is controlled by a device tree node which includes voltage limits.
+config REGULATOR_AS3722 + bool "Enable driver for AS7322 regulator" + depends on DM_REGULATOR && PMIC_AS3722 + help + Enable support for the regulator functions of the AS3722. The + driver implements enable/disable for step-down bucks and LDOs, + but does not yet support change voltages. Currently this must be + done using direct register writes to the PMIC. + config DM_REGULATOR_PFUZE100 bool "Enable Driver Model for REGULATOR PFUZE100" depends on DM_REGULATOR && DM_PMIC_PFUZE100 diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index ce14d08fd4..18fb870e43 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -7,6 +7,7 @@
obj-$(CONFIG_$(SPL_)DM_REGULATOR) += regulator-uclass.o obj-$(CONFIG_REGULATOR_ACT8846) += act8846.o +obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_DM_REGULATOR_PFUZE100) += pfuze100.o obj-$(CONFIG_REGULATOR_PWM) += pwm_regulator.o diff --git a/drivers/power/regulator/as3722_regulator.c b/drivers/power/regulator/as3722_regulator.c new file mode 100644 index 0000000000..0122e1e389 --- /dev/null +++ b/drivers/power/regulator/as3722_regulator.c @@ -0,0 +1,149 @@ +/* + * Copyright (C) 2017 Google, Inc + * Written by Simon Glass sjg@chromium.org + * + * Placeholder regulator driver for as3722. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <power/as3722.h> +#include <power/pmic.h> +#include <power/regulator.h> + +static int stepdown_get_value(struct udevice *dev) +{ + return -ENOSYS; +} + +static int stepdown_set_value(struct udevice *dev, int uvolt) +{ + return -ENOSYS; +} + +static int stepdown_set_enable(struct udevice *dev, bool enable) +{ + struct udevice *pmic = dev_get_parent(dev); + int sd = dev->driver_data; + int ret; + + ret = pmic_clrsetbits(pmic, AS3722_SD_CONTROL, 0, 1 << sd); + if (ret < 0) { + debug("%s: failed to write SD control register: %d", __func__, + ret); + return ret; + } + + return 0; +} + +static bool stepdown_get_enable(struct udevice *dev) +{ + struct udevice *pmic = dev_get_parent(dev); + int sd = dev->driver_data; + int ret; + + ret = pmic_reg_read(pmic, AS3722_SD_CONTROL); + if (ret < 0) { + debug("%s: failed to read SD control register: %d", __func__, + ret); + return false; + } + + return ret & (1 << sd) ? true : false; +} + +static int ldo_get_value(struct udevice *dev) +{ + return -ENOSYS; +} + +static int ldo_set_value(struct udevice *dev, int uvolt) +{ + return -ENOSYS; +} + +static int ldo_set_enable(struct udevice *dev, bool enable) +{ + struct udevice *pmic = dev_get_parent(dev); + int ldo = dev->driver_data; + int ret; + + ret = pmic_clrsetbits(pmic, AS3722_LDO_CONTROL, 0, 1 << ldo); + if (ret < 0) { + debug("%s: failed to write LDO control register: %d", __func__, + ret); + return ret; + } + + return 0; +} + +static bool ldo_get_enable(struct udevice *dev) +{ + struct udevice *pmic = dev_get_parent(dev); + int ldo = dev->driver_data; + int ret; + + ret = pmic_reg_read(pmic, AS3722_LDO_CONTROL); + if (ret < 0) { + debug("%s: failed to read SD control register: %d", __func__, + ret); + return false; + } + + return ret & (1 << ldo) ? true : false; +} + +static int as3722_stepdown_probe(struct udevice *dev) +{ + struct dm_regulator_uclass_platdata *uc_pdata; + + uc_pdata = dev_get_uclass_platdata(dev); + + uc_pdata->type = REGULATOR_TYPE_BUCK; + + return 0; +} + +static int as3722_ldo_probe(struct udevice *dev) +{ + struct dm_regulator_uclass_platdata *uc_pdata; + + uc_pdata = dev_get_uclass_platdata(dev); + + uc_pdata->type = REGULATOR_TYPE_LDO; + + return 0; +} + +static const struct dm_regulator_ops as3722_stepdown_ops = { + .get_value = stepdown_get_value, + .set_value = stepdown_set_value, + .get_enable = stepdown_get_enable, + .set_enable = stepdown_set_enable, +}; + +static const struct dm_regulator_ops as3722_ldo_ops = { + .get_value = ldo_get_value, + .set_value = ldo_set_value, + .get_enable = ldo_get_enable, + .set_enable = ldo_set_enable, +}; + +U_BOOT_DRIVER(as3722_stepdown) = { + .name = "as3722_stepdown", + .id = UCLASS_REGULATOR, + .ops = &as3722_stepdown_ops, + .probe = as3722_stepdown_probe, +}; + +U_BOOT_DRIVER(as3722_ldo) = { + .name = "as3722_ldo", + .id = UCLASS_REGULATOR, + .ops = &as3722_ldo_ops, + .probe = as3722_ldo_probe, +}; diff --git a/include/power/as3722.h b/include/power/as3722.h index 0f22482ff7..14afa0c81a 100644 --- a/include/power/as3722.h +++ b/include/power/as3722.h @@ -12,6 +12,14 @@ #define AS3722_GPIO_OUTPUT_VDDH (1 << 0) #define AS3722_GPIO_INVERT (1 << 1)
+#define AS3722_DEVICE_ID 0x0c +#define AS3722_SD_VOLTAGE(n) (0x00 + (n)) +#define AS3722_LDO_VOLTAGE(n) (0x10 + (n)) +#define AS3722_SD_CONTROL 0x4d +#define AS3722_LDO_CONTROL 0x4e +#define AS3722_ASIC_ID1 0x90 +#define AS3722_ASIC_ID2 0x91 + struct udevice;
int as3722_init(struct udevice **devp);