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Message-ID: <20190605204659.GA32329@roeck-us.net>
Date: Wed, 5 Jun 2019 13:46:59 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Vijay Khemka <vijaykhemka@...com>
Cc: Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, joel@....id.au,
linux-aspeed@...ts.ozlabs.org, sdasari@...com,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2 1/2] hwmon: pmbus: Add Infineon PXE1610 VR driver
On Thu, May 30, 2019 at 04:11:56PM -0700, Vijay Khemka wrote:
> Added pmbus driver for the new device Infineon pxe1610
> voltage regulator. It also supports similar family device
> PXE1110 and PXM1310.
>
> Signed-off-by: Vijay Khemka <vijaykhemka@...com>
Applied.
Thanks,
Guenter
> ---
> Changes in v2:
> incorporated all the feedback from Guenter Roeck <linux@...ck-us.net>
>
> drivers/hwmon/pmbus/Kconfig | 9 +++
> drivers/hwmon/pmbus/Makefile | 1 +
> drivers/hwmon/pmbus/pxe1610.c | 139 ++++++++++++++++++++++++++++++++++
> 3 files changed, 149 insertions(+)
> create mode 100644 drivers/hwmon/pmbus/pxe1610.c
>
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index 30751eb9550a..338ef9b5a395 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -154,6 +154,15 @@ config SENSORS_MAX8688
> This driver can also be built as a module. If so, the module will
> be called max8688.
>
> +config SENSORS_PXE1610
> + tristate "Infineon PXE1610"
> + help
> + If you say yes here you get hardware monitoring support for Infineon
> + PXE1610.
> +
> + This driver can also be built as a module. If so, the module will
> + be called pxe1610.
> +
> config SENSORS_TPS40422
> tristate "TI TPS40422"
> help
> diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
> index 2219b9300316..b0fbd017a91a 100644
> --- a/drivers/hwmon/pmbus/Makefile
> +++ b/drivers/hwmon/pmbus/Makefile
> @@ -18,6 +18,7 @@ obj-$(CONFIG_SENSORS_MAX20751) += max20751.o
> obj-$(CONFIG_SENSORS_MAX31785) += max31785.o
> obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
> obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
> +obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o
> obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o
> obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o
> obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
> diff --git a/drivers/hwmon/pmbus/pxe1610.c b/drivers/hwmon/pmbus/pxe1610.c
> new file mode 100644
> index 000000000000..ebe3f023f840
> --- /dev/null
> +++ b/drivers/hwmon/pmbus/pxe1610.c
> @@ -0,0 +1,139 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Hardware monitoring driver for Infineon PXE1610
> + *
> + * Copyright (c) 2019 Facebook Inc
> + *
> + */
> +
> +#include <linux/err.h>
> +#include <linux/i2c.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include "pmbus.h"
> +
> +#define PXE1610_NUM_PAGES 3
> +
> +/* Identify chip parameters. */
> +static int pxe1610_identify(struct i2c_client *client,
> + struct pmbus_driver_info *info)
> +{
> + if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) {
> + u8 vout_mode;
> + int ret;
> +
> + /* Read the register with VOUT scaling value.*/
> + ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
> + if (ret < 0)
> + return ret;
> +
> + vout_mode = ret & GENMASK(4, 0);
> +
> + switch (vout_mode) {
> + case 1:
> + info->vrm_version = vr12;
> + break;
> + case 2:
> + info->vrm_version = vr13;
> + break;
> + default:
> + return -ENODEV;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static struct pmbus_driver_info pxe1610_info = {
> + .pages = PXE1610_NUM_PAGES,
> + .format[PSC_VOLTAGE_IN] = linear,
> + .format[PSC_VOLTAGE_OUT] = vid,
> + .format[PSC_CURRENT_IN] = linear,
> + .format[PSC_CURRENT_OUT] = linear,
> + .format[PSC_TEMPERATURE] = linear,
> + .format[PSC_POWER] = linear,
> + .func[0] = PMBUS_HAVE_VIN
> + | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
> + | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
> + | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
> + | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
> + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
> + .func[1] = PMBUS_HAVE_VIN
> + | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
> + | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
> + | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
> + | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
> + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
> + .func[2] = PMBUS_HAVE_VIN
> + | PMBUS_HAVE_VOUT | PMBUS_HAVE_IIN
> + | PMBUS_HAVE_IOUT | PMBUS_HAVE_PIN
> + | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP
> + | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT
> + | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
> + .identify = pxe1610_identify,
> +};
> +
> +static int pxe1610_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct pmbus_driver_info *info;
> + u8 buf[I2C_SMBUS_BLOCK_MAX];
> + int ret;
> +
> + if (!i2c_check_functionality(
> + client->adapter,
> + I2C_FUNC_SMBUS_READ_BYTE_DATA
> + | I2C_FUNC_SMBUS_READ_WORD_DATA
> + | I2C_FUNC_SMBUS_READ_BLOCK_DATA))
> + return -ENODEV;
> +
> + /*
> + * By default this device doesn't boot to page 0, so set page 0
> + * to access all pmbus registers.
> + */
> + i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
> +
> + /* Read Manufacturer id */
> + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
> + if (ret < 0) {
> + dev_err(&client->dev, "Failed to read PMBUS_MFR_ID\n");
> + return ret;
> + }
> + if (ret != 2 || strncmp(buf, "XP", 2)) {
> + dev_err(&client->dev, "MFR_ID unrecognized\n");
> + return -ENODEV;
> + }
> +
> + info = devm_kmemdup(&client->dev, &pxe1610_info,
> + sizeof(struct pmbus_driver_info),
> + GFP_KERNEL);
> + if (!info)
> + return -ENOMEM;
> +
> + return pmbus_do_probe(client, id, info);
> +}
> +
> +static const struct i2c_device_id pxe1610_id[] = {
> + {"pxe1610", 0},
> + {"pxe1110", 0},
> + {"pxm1310", 0},
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, pxe1610_id);
> +
> +static struct i2c_driver pxe1610_driver = {
> + .driver = {
> + .name = "pxe1610",
> + },
> + .probe = pxe1610_probe,
> + .remove = pmbus_do_remove,
> + .id_table = pxe1610_id,
> +};
> +
> +module_i2c_driver(pxe1610_driver);
> +
> +MODULE_AUTHOR("Vijay Khemka <vijaykhemka@...com>");
> +MODULE_DESCRIPTION("PMBus driver for Infineon PXE1610, PXE1110 and PXM1310");
> +MODULE_LICENSE("GPL");
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