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Message-ID: <b72919f4-4b54-4452-bc3b-979aa8f8d7d3@roeck-us.net>
Date: Sun, 28 Apr 2024 10:27:09 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Peter Yin <peteryin.openbmc@...il.com>
Cc: patrick@...cx.xyz, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>,
Patrick Rudolph <patrick.rudolph@...ements.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Ninad Palsule <ninad@...ux.ibm.com>,
Fabio Estevam <festevam@...x.de>, Lukas Wunner <lukas@...ner.de>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
linux-i2c@...r.kernel.org
Subject: Re: [PATCH v2 1/2] hwmon: (pmbus) Add support for Infineon XDP710
On Thu, Apr 25, 2024 at 11:36:01PM +0800, Peter Yin wrote:
> Add support for Infineon XDP710.This is a Hot-Swap Controller.
>
> Signed-off-by: Peter Yin <peteryin.openbmc@...il.com>
Applied, after "s/microOhmRsense/micro_ohm_rsense/g"
Guenter
> ---
> Documentation/hwmon/index.rst | 1 +
> Documentation/hwmon/xdp710.rst | 83 +++++++++++++++++++++
> drivers/hwmon/pmbus/Kconfig | 9 +++
> drivers/hwmon/pmbus/Makefile | 1 +
> drivers/hwmon/pmbus/xdp710.c | 132 +++++++++++++++++++++++++++++++++
> 5 files changed, 226 insertions(+)
> create mode 100644 Documentation/hwmon/xdp710.rst
> create mode 100644 drivers/hwmon/pmbus/xdp710.c
>
> diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
> index 1ca7a4fe1f8f..b2546925fb15 100644
> --- a/Documentation/hwmon/index.rst
> +++ b/Documentation/hwmon/index.rst
> @@ -250,6 +250,7 @@ Hardware Monitoring Kernel Drivers
> wm831x
> wm8350
> xgene-hwmon
> + xdp710
> xdpe12284
> xdpe152c4
> zl6100
> diff --git a/Documentation/hwmon/xdp710.rst b/Documentation/hwmon/xdp710.rst
> new file mode 100644
> index 000000000000..083891f27818
> --- /dev/null
> +++ b/Documentation/hwmon/xdp710.rst
> @@ -0,0 +1,83 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +Kernel driver xdp710
> +====================
> +
> +Supported chips:
> +
> + * Infineon XDP710
> +
> + Prefix: 'xdp710'
> +
> + * Datasheet
> +
> + Publicly available at the Infineon website : https://www.infineon.com/dgdl/Infineon-XDP710-001-DataSheet-v01_00-EN.pdf?fileId=8ac78c8c8412f8d301848a5316290b97
> +
> +Author:
> +
> + Peter Yin <peteryin.openbmc@...il.com>
> +
> +Description
> +-----------
> +
> +This driver implements support for Infineon XDP710 Hot-Swap Controller.
> +
> +Device compliant with:
> +
> +- PMBus rev 1.3 interface.
> +
> +Device supports direct and linear format for reading input voltage,
> +output voltage, output current, input power and temperature.
> +
> +The driver exports the following attributes via the 'sysfs' files
> +for input voltage:
> +
> +**in1_input**
> +
> +**in1_label**
> +
> +**in1_max**
> +
> +**in1_max_alarm**
> +
> +**in1_min**
> +
> +**in1_min_alarm**
> +
> +The driver provides the following attributes for output voltage:
> +
> +**in2_input**
> +
> +**in2_label**
> +
> +**in2_alarm**
> +
> +The driver provides the following attributes for output current:
> +
> +**curr1_input**
> +
> +**curr1_label**
> +
> +**curr1_alarm**
> +
> +**curr1_max**
> +
> +The driver provides the following attributes for input power:
> +
> +**power1_input**
> +
> +**power1_label**
> +
> +**power1_alarm**
> +
> +The driver provides the following attributes for temperature:
> +
> +**temp1_input**
> +
> +**temp1_max**
> +
> +**temp1_max_alarm**
> +
> +**temp1_crit**
> +
> +**temp1_crit_alarm**
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index 557ae0c414b0..c775128c2ea7 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -511,6 +511,15 @@ config SENSORS_UCD9200
> This driver can also be built as a module. If so, the module will
> be called ucd9200.
>
> +config SENSORS_XDP710
> + tristate "Infineon XDP710 family"
> + help
> + If you say yes here you get hardware monitoring support for Infineon
> + XDP710.
> +
> + This driver can also be built as a module. If so, the module will
> + be called xdp710.
> +
> config SENSORS_XDPE152
> tristate "Infineon XDPE152 family"
> help
> diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
> index f14ecf03ad77..4fe630793721 100644
> --- a/drivers/hwmon/pmbus/Makefile
> +++ b/drivers/hwmon/pmbus/Makefile
> @@ -51,6 +51,7 @@ obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o
> obj-$(CONFIG_SENSORS_TPS546D24) += tps546d24.o
> obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
> obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
> +obj-$(CONFIG_SENSORS_XDP710) += xdp710.o
> obj-$(CONFIG_SENSORS_XDPE122) += xdpe12284.o
> obj-$(CONFIG_SENSORS_XDPE152) += xdpe152c4.o
> obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
> diff --git a/drivers/hwmon/pmbus/xdp710.c b/drivers/hwmon/pmbus/xdp710.c
> new file mode 100644
> index 000000000000..a00f79cda5e5
> --- /dev/null
> +++ b/drivers/hwmon/pmbus/xdp710.c
> @@ -0,0 +1,132 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Driver for Infineon XDP710 Hot-Swap Controller
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include "pmbus.h"
> +
> +#define XDP710_REG_CFG 0xD3
> +#define XDP710_V_SNS_CFG 0xD4
> +#define XDP710_CS_RNG 0xD5
> +
> +/*
> + * The table to map configuration register values
> + * to sense resistor values
> + */
> +const int microOhmRsense[] = {
> + 200, 250, 300, 330, 400, 470, 500, 600,
> + 670, 700, 750, 800, 900, 1000, 1100, 1200,
> + 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900,
> + 2000, 2100, 2200, 2300, 2400, 2500, 2600, 2700,
> + 2800, 3000, 3100, 3200, 3300, 3400, 3500, 3600,
> + 3700, 3800, 3900, 4000, 4100, 4200, 4300, 4400,
> + 4500, 4600, 4700, 4800, 4900, 5000, 5500, 6000,
> + 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10000
> +};
> +
> +static struct pmbus_driver_info xdp710_info = {
> + .pages = 1,
> + .format[PSC_VOLTAGE_IN] = direct,
> + .format[PSC_VOLTAGE_OUT] = direct,
> + .format[PSC_CURRENT_OUT] = direct,
> + .format[PSC_POWER] = direct,
> + .format[PSC_TEMPERATURE] = direct,
> + .m[PSC_VOLTAGE_IN] = 4653,
> + .b[PSC_VOLTAGE_IN] = 0,
> + .R[PSC_VOLTAGE_IN] = -2,
> + .m[PSC_VOLTAGE_OUT] = 4653,
> + .b[PSC_VOLTAGE_OUT] = 0,
> + .R[PSC_VOLTAGE_OUT] = -2,
> + .m[PSC_CURRENT_OUT] = 23165,
> + .b[PSC_CURRENT_OUT] = 0,
> + .R[PSC_CURRENT_OUT] = -2,
> + .m[PSC_POWER] = 4211,
> + .b[PSC_POWER] = 0,
> + .R[PSC_POWER] = -2,
> + .m[PSC_TEMPERATURE] = 52,
> + .b[PSC_TEMPERATURE] = 14321,
> + .R[PSC_TEMPERATURE] = -1,
> + .func[0] =
> + PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_PIN |
> + PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT |
> + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
> +};
> +
> +static int xdp710_probe(struct i2c_client *client)
> +{
> + struct pmbus_driver_info *info;
> + u8 cs_rng;
> + u8 vtlm_rng;
> + int rsense;
> + int ret;
> + int m = 0;
> +
> + info = devm_kmemdup(&client->dev, &xdp710_info, sizeof(*info),
> + GFP_KERNEL);
> + if (!info)
> + return -ENOMEM;
> +
> + ret = i2c_smbus_read_word_data(client, XDP710_CS_RNG);
> + if (ret < 0) {
> + dev_err(&client->dev, "Can't get CS_RNG");
> + return ret;
> + }
> + cs_rng = (ret >> 6) & GENMASK(1, 0);
> +
> + ret = i2c_smbus_read_word_data(client, XDP710_V_SNS_CFG);
> + if (ret < 0) {
> + dev_err(&client->dev, "Can't get V_SNS_CFG");
> + return ret;
> + }
> + vtlm_rng = ret & GENMASK(1, 0);
> +
> + ret = i2c_smbus_read_word_data(client, XDP710_REG_CFG);
> + if (ret < 0) {
> + dev_err(&client->dev, "Can't get REG_CFG");
> + return ret;
> + }
> + ret &= GENMASK(5, 0);
> + rsense = microOhmRsense[ret];
> +
> + info->m[PSC_VOLTAGE_IN] <<= vtlm_rng;
> + info->m[PSC_VOLTAGE_OUT] <<= vtlm_rng;
> +
> + m = info->m[PSC_CURRENT_OUT];
> + info->m[PSC_CURRENT_OUT] = DIV_ROUND_CLOSEST(m * rsense >> cs_rng,
> + 1000);
> +
> + m = info->m[PSC_POWER];
> + info->m[PSC_POWER] = DIV_ROUND_CLOSEST(m * rsense >> cs_rng, 1000);
> +
> + return pmbus_do_probe(client, info);
> +}
> +
> +static const struct of_device_id xdp710_of_match[] = {
> + { .compatible = "infineon,xdp710" },
> + {}
> +};
> +
> +static const struct i2c_device_id xdp710_id[] = {
> + {"xdp710", 0},
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, xdp710_id);
> +
> +static struct i2c_driver xdp710_driver = {
> + .driver = {
> + .name = "xdp710",
> + .of_match_table = xdp710_of_match,
> + },
> + .probe = xdp710_probe,
> + .id_table = xdp710_id,
> +};
> +module_i2c_driver(xdp710_driver);
> +
> +MODULE_AUTHOR("Peter Yin <peter.yin@...ntatw.com>");
> +MODULE_DESCRIPTION("PMBus driver for XDP710 HSC");
> +MODULE_LICENSE("GPL");
> +MODULE_IMPORT_NS(PMBUS);
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