diff options
| -rw-r--r-- | doc/device-tree-bindings/pmic/max77686.txt | 35 | ||||
| -rw-r--r-- | drivers/power/pmic/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/power/pmic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pmic/max77686.c | 87 | ||||
| -rw-r--r-- | drivers/power/pmic/pmic_max77686.c | 2 | ||||
| -rw-r--r-- | include/power/max77686_pmic.h | 10 |
6 files changed, 139 insertions, 3 deletions
diff --git a/doc/device-tree-bindings/pmic/max77686.txt b/doc/device-tree-bindings/pmic/max77686.txt new file mode 100644 index 0000000000..09aee647aa --- /dev/null +++ b/doc/device-tree-bindings/pmic/max77686.txt @@ -0,0 +1,35 @@ +MAXIM, MAX77686 pmic + +This device uses two drivers: +- drivers/power/pmic/max77686.c (for parent device) +- drivers/power/regulator/max77686.c (for child regulators) + +This file describes the binding info for the PMIC driver. + +To bind the regulators, please read the additional binding info: +- doc/device-tree-bindings/regulator/max77686.txt + +Required properties: +- compatible: "maxim,max77686" +- reg = 0x9 + +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: +- voltage-regulators: subnode list of each device's regulator + (see max77686.txt - regulator binding info) + +Example: + +max77686@09 { + compatible = "maxim,max77686"; + reg = <0x09>; + + voltage-regulators { + ldo1 { + ... + }; + ... + }; +}; diff --git a/drivers/power/pmic/Kconfig b/drivers/power/pmic/Kconfig index d06d632e89..af68783987 100644 --- a/drivers/power/pmic/Kconfig +++ b/drivers/power/pmic/Kconfig @@ -9,3 +9,10 @@ config DM_PMIC for read/write. For detailed description, please refer to the files: - 'drivers/power/pmic/pmic-uclass.c' - 'include/power/pmic.h' + +config DM_PMIC_MAX77686 + bool "Enable Driver Model for PMIC MAX77686" + depends on DM_PMIC + ---help--- + This config enables implementation of driver-model pmic uclass features + for PMIC MAX77686. The driver implements read/write operations.
\ No newline at end of file diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index 594f620218..8cb993d0a7 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o obj-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o obj-$(CONFIG_POWER_MAX77686) += pmic_max77686.o +obj-$(CONFIG_DM_PMIC_MAX77686) += max77686.o obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o obj-$(CONFIG_POWER_TPS65090_I2C) += pmic_tps65090.o obj-$(CONFIG_POWER_TPS65090_EC) += pmic_tps65090_ec.o diff --git a/drivers/power/pmic/max77686.c b/drivers/power/pmic/max77686.c new file mode 100644 index 0000000000..e9503e24a4 --- /dev/null +++ b/drivers/power/pmic/max77686.c @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2014-2015 Samsung Electronics + * Przemyslaw Marczak <p.marczak@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fdtdec.h> +#include <errno.h> +#include <dm.h> +#include <i2c.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <power/max77686_pmic.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct pmic_child_info pmic_childs_info[] = { + { .prefix = "ldo", .driver = MAX77686_LDO_DRIVER }, + { .prefix = "buck", .driver = MAX77686_BUCK_DRIVER }, + { }, +}; + +static int max77686_write(struct udevice *dev, uint reg, const uint8_t *buff, + int len) +{ + if (dm_i2c_write(dev, reg, buff, len)) { + error("write error to device: %p register: %#x!", dev, reg); + return -EIO; + } + + return 0; +} + +static int max77686_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{ + if (dm_i2c_read(dev, reg, buff, len)) { + error("read error from device: %p register: %#x!", dev, reg); + return -EIO; + } + + return 0; +} + +static int max77686_bind(struct udevice *dev) +{ + int regulators_node; + const void *blob = gd->fdt_blob; + int childs; + + regulators_node = fdt_subnode_offset(blob, dev->of_offset, + "voltage-regulators"); + if (regulators_node <= 0) { + debug("%s: %s regulators subnode not found!", __func__, + dev->name); + return -ENXIO; + } + + debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); + + childs = pmic_bind_childs(dev, regulators_node, pmic_childs_info); + if (!childs) + debug("%s: %s - no child found\n", __func__, dev->name); + + /* Always return success for this device */ + return 0; +} + +static struct dm_pmic_ops max77686_ops = { + .reg_count = MAX77686_NUM_OF_REGS, + .read = max77686_read, + .write = max77686_write, +}; + +static const struct udevice_id max77686_ids[] = { + { .compatible = "maxim,max77686" }, + { } +}; + +U_BOOT_DRIVER(pmic_max77686) = { + .name = "max77686 pmic", + .id = UCLASS_PMIC, + .of_match = max77686_ids, + .bind = max77686_bind, + .ops = &max77686_ops, +}; diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c index 95b1a57ca2..1ad810acc2 100644 --- a/drivers/power/pmic/pmic_max77686.c +++ b/drivers/power/pmic/pmic_max77686.c @@ -295,7 +295,7 @@ int pmic_init(unsigned char bus) p->name = name; p->interface = PMIC_I2C; - p->number_of_regs = PMIC_NUM_OF_REGS; + p->number_of_regs = MAX77686_NUM_OF_REGS; p->hw.i2c.tx_num = 1; puts("Board PMIC init\n"); diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h index b0e42550a2..95597db503 100644 --- a/include/power/max77686_pmic.h +++ b/include/power/max77686_pmic.h @@ -122,11 +122,17 @@ enum { MAX77686_REG_PMIC_BBAT = 0x7e, MAX77686_REG_PMIC_32KHZ, - PMIC_NUM_OF_REGS, + MAX77686_NUM_OF_REGS, }; /* I2C device address for pmic max77686 */ -#define MAX77686_I2C_ADDR (0x12 >> 1) +#define MAX77686_I2C_ADDR (0x12 >> 1) +#define MAX77686_LDO_NUM 26 +#define MAX77686_BUCK_NUM 9 + +/* Drivers name */ +#define MAX77686_LDO_DRIVER "max77686_ldo" +#define MAX77686_BUCK_DRIVER "max77686_buck" enum { REG_DISABLE = 0, |