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power: pmic: add the base MAX77663 PMIC support
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> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Svyatoslav Ryhel
Tom Rini
parent
9b1d277471
commit
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5 changed files with 217 additions and 0 deletions
84
doc/device-tree-bindings/pmic/max77663.txt
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84
doc/device-tree-bindings/pmic/max77663.txt
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@ -0,0 +1,84 @@
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MAXIM, MAX77663 PMIC
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This device uses two drivers:
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- drivers/power/pmic/max77663.c (for parent device)
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- drivers/power/regulator/max77663_regulator.c (for child regulators)
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This chapter describes the binding info for the PMIC driver and regulators.
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Required properties for PMIC:
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- compatible: "maxim,max77663"
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- reg: usually 0x1c or 0x3c
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With those two properties, the pmic device can be used for read/write only.
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To bind each regulator, the optional regulators subnode should exists.
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Optional subnode:
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- name: regulators (subnode list of each device's regulator)
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Regulators subnode contains set on supported regulators.
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Required properties:
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- regulator-name: used for regulator uclass platform data '.name',
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List of supported regulator nodes names for max77663:
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- sd0, sd1, sd2, sd3, ldo0, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7, ldo8
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Optional:
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- regulator-min-microvolt: minimum allowed Voltage to set
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- regulator-max-microvolt: minimum allowed Voltage to set
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- regulator-always-on: regulator should be never disabled
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- regulator-boot-on: regulator should be enabled by the bootloader
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Linux driver binding for this driver is compatible.
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Example:
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max77663@1c {
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compatible = "maxim,max77663";
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reg = <0x1c>;
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regulators {
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sd0 {
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regulator-name = "vdd_cpu";
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regulator-min-microvolt = <800000>;
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regulator-max-microvolt = <1250000>;
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regulator-always-on;
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regulator-boot-on;
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};
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...
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ldo0 {
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regulator-name = "avdd_pll";
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <1200000>;
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};
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...
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ldo2 {
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regulator-name = "avdd_usb";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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regulator-boot-on;
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};
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ldo3 {
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regulator-name = "vdd_sdmmc3";
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regulator-min-microvolt = <3000000>;
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regulator-max-microvolt = <3000000>;
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regulator-always-on;
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regulator-boot-on;
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};
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...
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ldo8 {
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regulator-name = "avdd_dsi_csi";
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regulator-min-microvolt = <1200000>;
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regulator-max-microvolt = <1200000>;
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};
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};
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};
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@ -184,6 +184,15 @@ config SPL_DM_PMIC_PFUZE100
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This config enables implementation of driver-model pmic uclass features
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for PMIC PFUZE100 in SPL. The driver implements read/write operations.
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config DM_PMIC_MAX77663
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bool "Enable Driver Model for PMIC MAX77663"
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---help---
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This config enables implementation of driver-model pmic uclass features
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for PMIC MAX77663. The driver implements read/write operations.
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This is a Power Management IC with a decent set of peripherals from which
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4 DC-to-DC Step-Down (SD) Regulators, 9 Low-Dropout Linear (LDO) Regulators,
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8 GPIOs, Real-Time Clock (RTC) and more with I2C Compatible Interface.
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config DM_PMIC_MAX77686
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bool "Enable Driver Model for PMIC MAX77686"
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---help---
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@ -6,6 +6,7 @@
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obj-$(CONFIG_$(SPL_TPL_)DM_PMIC) += pmic-uclass.o
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obj-$(CONFIG_$(SPL_)DM_PMIC_FAN53555) += fan53555.o
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obj-$(CONFIG_$(SPL_)DM_PMIC_DA9063) += da9063.o
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obj-$(CONFIG_$(SPL_)DM_PMIC_MAX77663) += max77663.o
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obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o
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obj-$(CONFIG_DM_PMIC_MAX8998) += max8998.o
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obj-$(CONFIG_DM_PMIC_MC34708) += mc34708.o
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81
drivers/power/pmic/max77663.c
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drivers/power/pmic/max77663.c
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@ -0,0 +1,81 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <dm.h>
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#include <dm/lists.h>
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#include <power/pmic.h>
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#include <power/max77663.h>
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static const struct pmic_child_info pmic_children_info[] = {
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{ .prefix = "ldo", .driver = MAX77663_LDO_DRIVER },
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{ .prefix = "sd", .driver = MAX77663_SD_DRIVER },
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{ },
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};
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static int max77663_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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int ret;
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ret = dm_i2c_write(dev, reg, buff, len);
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if (ret) {
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log_debug("write error to device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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static int max77663_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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int ret;
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ret = dm_i2c_read(dev, reg, buff, len);
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if (ret) {
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log_debug("read error from device: %p register: %#x!\n", dev, reg);
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return ret;
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}
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return 0;
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}
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static int max77663_bind(struct udevice *dev)
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{
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ofnode regulators_node;
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int children;
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regulators_node = dev_read_subnode(dev, "regulators");
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if (!ofnode_valid(regulators_node)) {
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log_err("%s regulators subnode not found!\n", dev->name);
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return -ENXIO;
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}
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debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
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children = pmic_bind_children(dev, regulators_node, pmic_children_info);
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if (!children)
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log_err("%s - no child found\n", dev->name);
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/* Always return success for this device */
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return 0;
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}
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static struct dm_pmic_ops max77663_ops = {
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.read = max77663_read,
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.write = max77663_write,
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};
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static const struct udevice_id max77663_ids[] = {
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{ .compatible = "maxim,max77663" },
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{ }
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};
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U_BOOT_DRIVER(pmic_max77663) = {
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.name = "max77663_pmic",
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.id = UCLASS_PMIC,
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.of_match = max77663_ids,
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.bind = max77663_bind,
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.ops = &max77663_ops,
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};
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42
include/power/max77663.h
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42
include/power/max77663.h
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@ -0,0 +1,42 @@
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#ifndef _MAX77663_H_
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#define _MAX77663_H_
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#define MAX77663_LDO_NUM 9
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#define MAX77663_SD_NUM 5
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/* Drivers name */
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#define MAX77663_LDO_DRIVER "max77663_ldo"
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#define MAX77663_SD_DRIVER "max77663_sd"
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/* Step-Down (SD) Regulator calculations */
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#define SD_STATUS_MASK 0x30
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#define SD0_VOLT_MAX_HEX 0x40
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#define SD1_VOLT_MAX_HEX 0x4c
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#define SD_VOLT_MAX_HEX 0xff
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#define SD_VOLT_MIN_HEX 0x02
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#define SD0_VOLT_MAX 1400000
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#define SD1_VOLT_MAX 1550000
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#define SD_VOLT_MAX 3787500
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#define SD_VOLT_MIN 625000
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#define SD_VOLT_BASE 600000
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/* Low-Dropout Linear (LDO) Regulator calculations */
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#define LDO_STATUS_MASK 0xc0
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#define LDO_VOLT_MASK 0x3f
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#define LDO_VOLT_MAX_HEX 0x3f
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#define LDO01_VOLT_MAX 2375000
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#define LDO4_VOLT_MAX 1587500
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#define LDO_VOLT_MAX 3950000
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#define LDO_VOLT_BASE 800000
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#endif /* _MAX77663_H_ */
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