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kernel: hwmon-is28022: new package added

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Added driver for ISL28022 power monitor
used e.g. in Ubiquiti  Edgerouter ER-6P

Signed-off-by: Carsten Spieß <mail@carsten-spiess.de>
This commit is contained in:
Carsten Spieß 2023-07-25 14:34:27 +02:00
parent c74b5e09e6
commit c21bd25cc5
4 changed files with 477 additions and 0 deletions
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37
package/kernel/hwmon-isl28022/Makefile Normal file
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#
# Copyright (C) 2023 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=hwmon-isl28022
PKG_RELEASE:=1
PKG_MAINTAINER:=Carsten Spieß <mail@carsten-spiess.de
PKG_LICENSE:=GPL-2.0
include $(INCLUDE_DIR)/package.mk
define KernelPackage/hwmon-isl28022
SUBMENU:=Hardware Monitoring Support
TITLE:= hwmon ISL28022 support
DEPENDS:= +kmod-hwmon-core +kmod-i2c-core +kmod-regmap-i2c
FILES:=$(PKG_BUILD_DIR)/isl28022.ko
AUTOLOAD:=$(call AutoLoad,30,isl28022,1)
endef
define KernelPackage/hwmon-isl28022/description
Driver for ISL28022 power monitor.
endef
define Build/Compile
$(KERNEL_MAKE) \
$(MAKE_OPTS) \
M="$(PKG_BUILD_DIR)" \
modules
endef
$(eval $(call KernelPackage,hwmon-isl28022))

1
package/kernel/hwmon-isl28022/src/Makefile Normal file
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obj-m += isl28022.o

415
package/kernel/hwmon-isl28022/src/isl28022.c Normal file
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* isl28022.c - driver for Renesas ISL28022 power monitor chip
* monitoring
* Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
*/
/*#define DEBUG*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include <linux/regulator/consumer.h>
enum isl28022_type {isl28022};
/* ISL28022 registers */
#define ISL28022_REG_CONFIG 0x00
#define ISL28022_REG_SHUNT 0x01
#define ISL28022_REG_BUS 0x02
#define ISL28022_REG_POWER 0x03
#define ISL28022_REG_CURRENT 0x04
#define ISL28022_REG_CALIB 0x05
#define ISL28022_REG_SHUNT_THR 0x06
#define ISL28022_REG_BUS_THR 0x07
#define ISL28022_REG_INT 0x08
#define ISL28022_REG_AUX 0x09
#define ISL28022_REG_MAX ISL28022_REG_AUX
/* ISL28022 config flags */
/* mode flags */
#define ISL28022_MODE_SHIFT 0
#define ISL28022_MODE_MASK 0x0007
#define ISL28022_MODE_PWR_DOWN 0x0
#define ISL28022_MODE_TRG_S 0x1
#define ISL28022_MODE_TRG_B 0x2
#define ISL28022_MODE_TRG_SB 0x3
#define ISL28022_MODE_ADC_OFF 0x4
#define ISL28022_MODE_CONT_S 0x5
#define ISL28022_MODE_CONT_B 0x6
#define ISL28022_MODE_CONT_SB 0x7
/* shunt ADC settings */
#define ISL28022_SADC_SHIFT 3
#define ISL28022_SADC_MASK 0x0078
#define ISL28022_BADC_SHIFT 7
#define ISL28022_BADC_MASK 0x0780
#define ISL28022_ADC_12 0x0 /* 12 bit ADC */
#define ISL28022_ADC_13 0x1 /* 13 bit ADC */
#define ISL28022_ADC_14 0x2 /* 14 bit ADC */
#define ISL28022_ADC_15 0x3 /* 15 bit ADC */
#define ISL28022_ADC_15_1 0x8 /* 15 bit ADC, 1 sample */
#define ISL28022_ADC_15_2 0x9 /* 15 bit ADC, 2 samples */
#define ISL28022_ADC_15_4 0xA /* 15 bit ADC, 4 samples */
#define ISL28022_ADC_15_8 0xB /* 15 bit ADC, 8 samples */
#define ISL28022_ADC_15_16 0xC /* 15 bit ADC, 16 samples */
#define ISL28022_ADC_15_32 0xD /* 15 bit ADC, 32 samples */
#define ISL28022_ADC_15_64 0xE /* 15 bit ADC, 64 samples */
#define ISL28022_ADC_15_128 0xF /* 15 bit ADC, 128 samples */
/* shunt voltage range */
#define ISL28022_PG_SHIFT 11
#define ISL28022_PG_MASK 0x1800
#define ISL28022_PG_40 0x0 /* +/-40 mV */
#define ISL28022_PG_80 0x1 /* +/-80 mV */
#define ISL28022_PG_160 0x2 /* +/-160 mV */
#define ISL28022_PG_320 0x3 /* +/-3200 mV */
/* bus voltage range */
#define ISL28022_BRNG_SHIFT 13
#define ISL28022_BRNG_MASK 0x6000
#define ISL28022_BRNG_16 0x0 /* 16 V */
#define ISL28022_BRNG_32 0x1 /* 32 V */
#define ISL28022_BRNG_60 0x3 /* 60 V */
/* reset */
#define ISL28022_RESET 0x8000
struct isl28022_data {
struct i2c_client *client;
struct regmap *regmap;
u32 shunt;
u32 gain;
u32 average;
u16 config;
u16 calib;
};
static int isl28022_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct isl28022_data *data = dev_get_drvdata(dev);
unsigned int regval;
int err;
switch (type) {
case hwmon_in:
switch (attr) {
case hwmon_in_input:
err = regmap_read(data->regmap, ISL28022_REG_SHUNT + channel, &regval);
if (err < 0)
return err;
dev_dbg(dev, "read reg %d: %x\n", ISL28022_REG_SHUNT + channel, regval);
*val = (0 == channel) ?
(long)((s16)((u16)regval)) * 10 :
(long)(((u16)regval) & 0xFFFC);
break;
default:
return -EINVAL;
}
break;
case hwmon_curr:
switch (attr) {
case hwmon_curr_input:
err = regmap_read(data->regmap, ISL28022_REG_CURRENT, &regval);
if (err < 0)
return err;
dev_dbg(dev, "read reg %d: %x\n", ISL28022_REG_CURRENT, regval);
if(!data->shunt)
return -EINVAL;
*val = ((long)regval * 10000L * (long)data->gain) / (long)(8 * data->shunt);
break;
default:
return -EINVAL;
}
break;
case hwmon_power:
switch (attr) {
case hwmon_power_input:
err = regmap_read(data->regmap, ISL28022_REG_POWER, &regval);
if (err < 0)
return err;
dev_dbg(dev, "read reg %d: %x\n", ISL28022_REG_POWER, regval);
if(!data->shunt)
return -EINVAL;
*val = ((long)regval * 409600000L * (long)data->gain) / (long)(8 * data->shunt);
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return 0;
}
static umode_t isl28022_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
switch (type) {
case hwmon_in:
switch (attr) {
case hwmon_in_input:
return 0444;
}
break;
case hwmon_curr:
switch (attr) {
case hwmon_curr_input:
return 0444;
}
break;
case hwmon_power:
switch (attr) {
case hwmon_power_input:
return 0444;
}
break;
default:
break;
}
return 0;
}
static const struct hwmon_channel_info *isl28022_info[] = {
HWMON_CHANNEL_INFO(in,
HWMON_I_INPUT, /* channel 0: shunt voltage (µV) */
HWMON_I_INPUT), /* channel 1: bus voltage (mV) */
NULL
};
static const struct hwmon_channel_info *isl28022_info_shunt[] = {
HWMON_CHANNEL_INFO(in,
HWMON_I_INPUT, /* channel 0: shunt voltage (µV) */
HWMON_I_INPUT), /* channel 1: bus voltage (mV) */
HWMON_CHANNEL_INFO(curr,
HWMON_C_INPUT), /* channel 1: current (mA) */
HWMON_CHANNEL_INFO(power,
HWMON_P_INPUT), /* channel 1: power (µW) */
NULL
};
static const struct hwmon_ops isl28022_hwmon_ops = {
.is_visible = isl28022_is_visible,
.read = isl28022_read,
};
static const struct hwmon_chip_info isl28022_chip_info = {
.ops = &isl28022_hwmon_ops,
.info = isl28022_info,
};
static const struct hwmon_chip_info isl28022_chip_info_shunt = {
.ops = &isl28022_hwmon_ops,
.info = isl28022_info_shunt,
};
static bool isl28022_is_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case ISL28022_REG_CONFIG:
case ISL28022_REG_CALIB:
case ISL28022_REG_SHUNT_THR:
case ISL28022_REG_BUS_THR:
case ISL28022_REG_INT:
case ISL28022_REG_AUX:
return true;
}
return false;
}
static bool isl28022_is_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case ISL28022_REG_CONFIG:
case ISL28022_REG_SHUNT:
case ISL28022_REG_BUS:
case ISL28022_REG_POWER:
case ISL28022_REG_CURRENT:
case ISL28022_REG_INT:
case ISL28022_REG_AUX:
return true;
}
return true;
}
static const struct regmap_config isl28022_regmap_config = {
.reg_bits = 8,
.val_bits = 16,
.max_register = ISL28022_REG_MAX,
.writeable_reg = isl28022_is_writeable_reg,
.volatile_reg = isl28022_is_volatile_reg,
.val_format_endian = REGMAP_ENDIAN_BIG,
.cache_type = REGCACHE_RBTREE,
.use_single_read = true,
.use_single_write = true,
};
static const struct i2c_device_id isl28022_ids[] = {
{ "isl28022", isl28022},
{ /* LIST END */ }
};
MODULE_DEVICE_TABLE(i2c, isl28022_ids);
static int isl28022_config(struct device *dev)
{
struct isl28022_data *data = dev_get_drvdata(dev);
if (!dev || !data)
return -EINVAL;
;
data->config = (ISL28022_MODE_CONT_SB << ISL28022_MODE_SHIFT) | \
(ISL28022_BRNG_60 << ISL28022_BRNG_SHIFT);
switch (data->gain) {
case 1:
data->config |= (ISL28022_PG_40 << ISL28022_PG_SHIFT);
break;
case 2:
data->config |= (ISL28022_PG_80 << ISL28022_PG_SHIFT);
break;
case 4:
data->config |= (ISL28022_PG_160 << ISL28022_PG_SHIFT);
break;
default:
data->config |= (ISL28022_PG_320 << ISL28022_PG_SHIFT);
data->gain = 8;
break;
}
data->calib = data->shunt ? 0x8000 / data->gain : 0;
switch (data->average) {
case 128:
data->config |= (ISL28022_ADC_15_128 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_128 << ISL28022_BADC_SHIFT);
break;
case 64:
data->config |= (ISL28022_ADC_15_64 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_64 << ISL28022_BADC_SHIFT);
break;
case 32:
data->config |= (ISL28022_ADC_15_32 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_32 << ISL28022_BADC_SHIFT);
break;
case 16:
data->config |= (ISL28022_ADC_15_16 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_16 << ISL28022_BADC_SHIFT);
break;
case 8:
data->config |= (ISL28022_ADC_15_8 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_8 << ISL28022_BADC_SHIFT);
break;
case 4:
data->config |= (ISL28022_ADC_15_4 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_4 << ISL28022_BADC_SHIFT);
break;
case 2:
data->config |= (ISL28022_ADC_15_2 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_2 << ISL28022_BADC_SHIFT);
break;
case 1:
data->config |= (ISL28022_ADC_15_1 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15_1 << ISL28022_BADC_SHIFT);
break;
default:
data->config |= (ISL28022_ADC_15 << ISL28022_SADC_SHIFT) |
(ISL28022_ADC_15 << ISL28022_BADC_SHIFT);
data->average = 0;
break;
}
regmap_write(data->regmap, ISL28022_REG_CONFIG, data->config);
dev_dbg(dev, "write reg %d: %x\n", ISL28022_REG_CONFIG, data->config);
regmap_write(data->regmap, ISL28022_REG_CALIB, data->calib);
dev_dbg(dev, "write reg %d: %x\n", ISL28022_REG_CALIB, data->calib);
return 0;
}
static int isl28022_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct isl28022_data *data;
int status;
dev_dbg(dev, "probe\n");
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
return -EIO;
data = devm_kzalloc(dev, sizeof(struct isl28022_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
if (!of_property_read_u32(dev->of_node, "shunt-resistor-micro-ohms", &data->shunt))
dev_dbg(dev, "shunt-resistor %d\n", data->shunt);
if (!of_property_read_u32(dev->of_node, "shunt-gain", &data->gain))
dev_dbg(dev, "shunt-gain %d\n", data->gain);
if (!of_property_read_u32(dev->of_node, "average", &data->average))
dev_dbg(dev, "average %d\n", data->average);
data->regmap = devm_regmap_init_i2c(client, &isl28022_regmap_config);
if (IS_ERR(data->regmap))
return PTR_ERR(data->regmap);
hwmon_dev = devm_hwmon_device_register_with_info(dev, "isl28022_hwmon"/*client->name*/, data,
data->shunt ? &isl28022_chip_info_shunt : &isl28022_chip_info, NULL);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
status = isl28022_config(hwmon_dev);
if (status)
return status;
dev_info(dev, "%s: sensor '%s'\n", dev_name(hwmon_dev), client->name);
return 0;
}
static const struct of_device_id __maybe_unused isl28022_of_match[] = {
{
.compatible = "isl,isl28022",
.data = (void *)isl28022
},
{ /* LIST END */ }
};
MODULE_DEVICE_TABLE(of, isl28022_of_match);
static struct i2c_driver isl28022_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "isl28022",
.of_match_table = of_match_ptr(isl28022_of_match),
},
.probe_new = isl28022_probe,
.id_table = isl28022_ids,
};
module_i2c_driver(isl28022_driver);
MODULE_AUTHOR("Carsten Spiess <mail@carsten-spiess.de>");
MODULE_DESCRIPTION("ISL28022 driver");
MODULE_LICENSE("GPL");

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target/linux/generic/hack-5.15/262-regmap-i2c-unhide.patch Normal file
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This makes it possible to select CONFIG_REGMAP and CONFIG_REGMAP_I2C.
This is needed to compile this into the kernel and make use of it
from out of tree drivers like hwmon-isl28022.
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -6,7 +6,7 @@
config REGMAP
select IRQ_DOMAIN if REGMAP_IRQ
select MDIO_BUS if REGMAP_MDIO
- tristate
+ tristate "select REGMAP"
config REGCACHE_COMPRESSED
select LZO_COMPRESS
@@ -19,7 +19,7 @@ config REGMAP_AC97
config REGMAP_I2C
select REGMAP
- tristate
+ tristate "select REGMAP_I2C"
depends on I2C
config REGMAP_SLIMBUS