Add support to bind the regulators/child nodes with the pmic. Also adds the pmic i2c based read/write functions to access pmic registers.
Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com Reviewed-by: Simon Glass sjg@chromium.org --- doc/device-tree-bindings/pmic/max77663.txt | 84 +++++++++++++++++++++ drivers/power/pmic/Kconfig | 9 +++ drivers/power/pmic/Makefile | 1 + drivers/power/pmic/max77663.c | 86 ++++++++++++++++++++++ include/power/max77663.h | 42 +++++++++++ 5 files changed, 222 insertions(+) create mode 100644 doc/device-tree-bindings/pmic/max77663.txt create mode 100644 drivers/power/pmic/max77663.c create mode 100644 include/power/max77663.h
diff --git a/doc/device-tree-bindings/pmic/max77663.txt b/doc/device-tree-bindings/pmic/max77663.txt new file mode 100644 index 0000000000..ddb7d3eb14 --- /dev/null +++ b/doc/device-tree-bindings/pmic/max77663.txt @@ -0,0 +1,84 @@ +MAXIM, MAX77663 PMIC + +This device uses two drivers: +- drivers/power/pmic/max77663.c (for parent device) +- drivers/power/regulator/max77663_regulator.c (for child regulators) + +This chapter describes the binding info for the PMIC driver and regulators. + +Required properties for PMIC: +- compatible: "maxim,max77663" +- reg: usually 0x1c or 0x3c + +With those two properties, the pmic device can be used for read/write only. +To bind each regulator, the optional regulators subnode should exists. + +Optional subnode: +- name: regulators (subnode list of each device's regulator) + +Regulators subnode contains set on supported regulators. + +Required properties: +- regulator-name: used for regulator uclass platform data '.name', + +List of supported regulator nodes names for max77663: +- sd0, sd1, sd2, sd3, ldo0, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7, ldo8 + +Optional: +- regulator-min-microvolt: minimum allowed Voltage to set +- regulator-max-microvolt: minimum allowed Voltage to set +- regulator-always-on: regulator should be never disabled +- regulator-boot-on: regulator should be enabled by the bootloader + +Linux driver binding for this driver is compatible. + +Example: + +max77663@1c { + compatible = "maxim,max77663"; + reg = <0x1c>; + + regulators { + sd0 { + regulator-name = "vdd_cpu"; + regulator-min-microvolt = <800000>; + regulator-max-microvolt = <1250000>; + regulator-always-on; + regulator-boot-on; + }; + + ... + + ldo0 { + regulator-name = "avdd_pll"; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + }; + + ... + + ldo2 { + regulator-name = "avdd_usb"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-always-on; + regulator-boot-on; + }; + + ldo3 { + regulator-name = "vdd_sdmmc3"; + regulator-min-microvolt = <3000000>; + regulator-max-microvolt = <3000000>; + regulator-always-on; + regulator-boot-on; + }; + + ... + + ldo8 { + regulator-name = "avdd_dsi_csi"; + regulator-min-microvolt = <1200000>; + regulator-max-microvolt = <1200000>; + }; + }; +}; diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig index 176fb07c65..b2a5e71a87 100644 --- a/drivers/power/pmic/Kconfig +++ b/drivers/power/pmic/Kconfig @@ -184,6 +184,15 @@ config SPL_DM_PMIC_PFUZE100 This config enables implementation of driver-model pmic uclass features for PMIC PFUZE100 in SPL. The driver implements read/write operations.
+config DM_PMIC_MAX77663 + bool "Enable Driver Model for PMIC MAX77663" + ---help--- + This config enables implementation of driver-model pmic uclass features + for PMIC MAX77663. The driver implements read/write operations. + This is a Power Management IC with a decent set of peripherals from which + 4 DC-to-DC Step-Down (SD) Regulators, 9 Low-Dropout Linear (LDO) Regulators, + 8 GPIOs, Real-Time Clock (RTC) and more with I2C Compatible Interface. + config DM_PMIC_MAX77686 bool "Enable Driver Model for PMIC MAX77686" ---help--- diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index 0b3b3d62d0..414a9d8225 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_$(SPL_TPL_)DM_PMIC) += pmic-uclass.o obj-$(CONFIG_$(SPL_)DM_PMIC_FAN53555) += fan53555.o obj-$(CONFIG_$(SPL_)DM_PMIC_DA9063) += da9063.o +obj-$(CONFIG_$(SPL_)DM_PMIC_MAX77663) += max77663.o obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o diff --git a/drivers/power/pmic/max77663.c b/drivers/power/pmic/max77663.c new file mode 100644 index 0000000000..4070235d3c --- /dev/null +++ b/drivers/power/pmic/max77663.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#include <common.h> +#include <fdtdec.h> +#include <errno.h> +#include <dm.h> +#include <i2c.h> +#include <log.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <power/max77663.h> + +static const struct pmic_child_info pmic_children_info[] = { + { .prefix = "ldo", .driver = MAX77663_LDO_DRIVER }, + { .prefix = "sd", .driver = MAX77663_SD_DRIVER }, + { }, +}; + +static int max77663_write(struct udevice *dev, uint reg, const uint8_t *buff, + int len) +{ + int ret; + + ret = dm_i2c_write(dev, reg, buff, len); + if (ret) { + log_debug("write error to device: %p register: %#x!\n", dev, reg); + return ret; + } + + return 0; +} + +static int max77663_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{ + int ret; + + ret = dm_i2c_read(dev, reg, buff, len); + if (ret) { + log_debug("read error from device: %p register: %#x!\n", dev, reg); + return ret; + } + + return 0; +} + +static int max77663_bind(struct udevice *dev) +{ + ofnode regulators_node; + int children; + + regulators_node = dev_read_subnode(dev, "regulators"); + if (!ofnode_valid(regulators_node)) { + log_err("%s regulators subnode not found!\n", dev->name); + return -ENXIO; + } + + debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); + + children = pmic_bind_children(dev, regulators_node, pmic_children_info); + if (!children) + log_err("%s - no child found\n", dev->name); + + /* Always return success for this device */ + return 0; +} + +static struct dm_pmic_ops max77663_ops = { + .read = max77663_read, + .write = max77663_write, +}; + +static const struct udevice_id max77663_ids[] = { + { .compatible = "maxim,max77663" }, + { } +}; + +U_BOOT_DRIVER(pmic_max77663) = { + .name = "max77663_pmic", + .id = UCLASS_PMIC, + .of_match = max77663_ids, + .bind = max77663_bind, + .ops = &max77663_ops, +}; diff --git a/include/power/max77663.h b/include/power/max77663.h new file mode 100644 index 0000000000..0f764bcbcc --- /dev/null +++ b/include/power/max77663.h @@ -0,0 +1,42 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#ifndef _MAX77663_H_ +#define _MAX77663_H_ + +#define MAX77663_LDO_NUM 9 +#define MAX77663_SD_NUM 5 + +/* Drivers name */ +#define MAX77663_LDO_DRIVER "max77663_ldo" +#define MAX77663_SD_DRIVER "max77663_sd" + +/* Step-Down (SD) Regulator calculations */ +#define SD_STATUS_MASK 0x30 + +#define SD0_VOLT_MAX_HEX 0x40 +#define SD1_VOLT_MAX_HEX 0x4c +#define SD_VOLT_MAX_HEX 0xff +#define SD_VOLT_MIN_HEX 0x02 + +#define SD0_VOLT_MAX 1400000 +#define SD1_VOLT_MAX 1550000 +#define SD_VOLT_MAX 3787500 +#define SD_VOLT_MIN 625000 + +#define SD_VOLT_BASE 600000 + +/* Low-Dropout Linear (LDO) Regulator calculations */ +#define LDO_STATUS_MASK 0xc0 +#define LDO_VOLT_MASK 0x3f +#define LDO_VOLT_MAX_HEX 0x3f + +#define LDO01_VOLT_MAX 2375000 +#define LDO4_VOLT_MAX 1587500 +#define LDO_VOLT_MAX 3950000 + +#define LDO_VOLT_BASE 800000 + +#endif /* _MAX77663_H_ */