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drivers: mfd: add Maxim MAX20335 MFD driver

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Maxim MAX20335 is a PMIC with Ultra-Low IQ Voltage Regulators and
Battery Chargers for Small Lithium Ion Systems.

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
This commit is contained in:
Bartosz Bilas 2023-10-30 12:53:08 +01:00 committed by Fabio Baltieri
parent e07ded1656
commit 4a397402a7
6 changed files with 76 additions and 0 deletions
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1
CODEOWNERS
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@ -373,6 +373,7 @@
/drivers/led_strip/ @mbolivar-ampere
/drivers/lora/ @Mani-Sadhasivam
/drivers/mbox/ @carlocaione
/drivers/mfd/mfd_max20335.c @bbilas
/drivers/misc/ @tejlmand
/drivers/misc/ft8xx/ @hubertmis
/drivers/mm/ @dcpleung

1
drivers/mfd/CMakeLists.txt
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@ -3,6 +3,7 @@
zephyr_library()
zephyr_library_sources_ifdef(CONFIG_MFD_MAX20335 mfd_max20335.c)
zephyr_library_sources_ifdef(CONFIG_MFD_NCT38XX mfd_nct38xx.c)
zephyr_library_sources_ifdef(CONFIG_MFD_NPM1300 mfd_npm1300.c)
zephyr_library_sources_ifdef(CONFIG_MFD_NPM6001 mfd_npm6001.c)

1
drivers/mfd/Kconfig
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@ -19,6 +19,7 @@ config MFD_INIT_PRIORITY
Multi-function devices initialization priority.
source "drivers/mfd/Kconfig.axp192"
source "drivers/mfd/Kconfig.max20335"
source "drivers/mfd/Kconfig.nct38xx"
source "drivers/mfd/Kconfig.npm1300"
source "drivers/mfd/Kconfig.npm6001"

10
drivers/mfd/Kconfig.max20335 Normal file
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@ -0,0 +1,10 @@
# Copyright (c) 2023 Grinn
# SPDX -License-Identifier: Apache-2.0
config MFD_MAX20335
bool "MAX20335 PMIC multi-function device driver"
default y
depends on DT_HAS_MAXIM_MAX20335_ENABLED
select I2C
help
Enable the Maxim MAX20335 PMIC multi-function device driver

51
drivers/mfd/mfd_max20335.c Normal file
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@ -0,0 +1,51 @@
/*
* Copyright (c) 2023 Grinn
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT maxim_max20335
#include <errno.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/sys/util.h>
#define MAX20335_REG_CHIP_ID 0x00
#define MAX20335_CHIP_ID_VAL 0x04
struct mfd_max20335_config {
struct i2c_dt_spec bus;
};
static int mfd_max20335_init(const struct device *dev)
{
const struct mfd_max20335_config *config = dev->config;
uint8_t val;
int ret;
if (!i2c_is_ready_dt(&config->bus)) {
return -ENODEV;
}
ret = i2c_reg_read_byte_dt(&config->bus, MAX20335_REG_CHIP_ID, &val);
if (ret < 0) {
return ret;
}
if (val != MAX20335_CHIP_ID_VAL) {
return -ENODEV;
}
return 0;
}
#define MFD_MA20335_DEFINE(inst) \
static const struct mfd_max20335_config mfd_max20335_config##inst = { \
.bus = I2C_DT_SPEC_INST_GET(inst), \
}; \
\
DEVICE_DT_INST_DEFINE(inst, mfd_max20335_init, NULL, NULL, \
&mfd_max20335_config##inst, POST_KERNEL, \
CONFIG_MFD_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(MFD_MA20335_DEFINE)

12
dts/bindings/mfd/maxim,max20335.yaml Normal file
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@ -0,0 +1,12 @@
# Copyright (c) 2023 Grinn
# SPDX-License-Identifier: Apache-2.0
description: Maxim MAX20335
compatible: "maxim,max20335"
include: i2c-device.yaml
properties:
reg:
required: true