On Tue, Aug 29, 2017 at 08:06:22PM +0000, Vadim Pasternak wrote:
> The below lists of VOUT_MODE command readout with their related VID
> protocols, Digital to Analog Converter steps, supported by the device:
> VR12.0 mode, 5-mV DAC - 0x21
> VR12.5 mode, 10-mV DAC - 0x22
> VR13.0 mode, 10-mV DAC - 0x24
> IMVP8 mode, 5-mV DAC - 0x25
> VR13.0 mode, 5-mV DAC - 0x27
>
> Signed-off-by: Vadim Pasternak <[email protected]>
> ---
> drivers/hwmon/pmbus/Kconfig | 10 ++++
> drivers/hwmon/pmbus/Makefile | 1 +
> drivers/hwmon/pmbus/tps53679.c | 126
> +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 137 insertions(+)
> create mode 100644 drivers/hwmon/pmbus/tps53679.c
>
> diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
> index 68d717a..42d2366 100644
> --- a/drivers/hwmon/pmbus/Kconfig
> +++ b/drivers/hwmon/pmbus/Kconfig
> @@ -135,6 +135,16 @@ config SENSORS_TPS40422
> This driver can also be built as a module. If so, the module will
> be called tps40422.
>
> +config SENSORS_TPS53679
> + tristate "TI TPS53679"
> + default n
> + help
> + If you say yes here you get hardware monitoring support for TI
> + TPS53679.
> +
> + This driver can also be built as a module. If so, the module will
> + be called tps53679.
> +
> config SENSORS_UCD9000
> tristate "TI UCD90120, UCD90124, UCD90160, UCD9090, UCD90910"
> default n
> diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
> index 75bb7ca..c7c76b0 100644
> --- a/drivers/hwmon/pmbus/Makefile
> +++ b/drivers/hwmon/pmbus/Makefile
> @@ -14,6 +14,7 @@ obj-$(CONFIG_SENSORS_MAX20751) += max20751.o
> obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
> obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
> obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o
> +obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o
> obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
> obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
> obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
> diff --git a/drivers/hwmon/pmbus/tps53679.c b/drivers/hwmon/pmbus/tps53679.c
> new file mode 100644
> index 0000000..1cdd456
> --- /dev/null
> +++ b/drivers/hwmon/pmbus/tps53679.c
> @@ -0,0 +1,126 @@
> +/*
> + * Hardware monitoring driver for Texas Instruments TPS53679
> + *
> + * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
> + * Copyright (c) 2017 Vadim Pasternak <[email protected]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/err.h>
> +#include <linux/i2c.h>
Alphabetic order, please.
> +#include "pmbus.h"
> +
> +#define TPS53679_PROT_VR12_5MV 0x01 /* VR12.0 mode, 5-mV DAC */
> +#define TPS53679_PROT_VR12_5_10MV 0x02 /* VR12.5 mode, 10-mV DAC */
> +#define TPS53679_PROT_VR13_10MV 0x04 /* VR13.0 mode, 10-mV DAC
> */
> +#define TPS53679_PROT_IMVP8_5MV 0x05 /* IMVP8 mode, 5-mV DAC */
> +#define TPS53679_PROT_VR13_5MV 0x07 /* VR13.0 mode, 5-mV DAC */
> +#define TPS53679_PAGE_NUM 2
> +
> +struct tps53679_data {
> + u8 vout_params; /* VOUT parameters */
Only used in tps53679_identify() and thus not needed in tps53679_data.
> + struct pmbus_driver_info info;
> +};
> +
> +#define to_tps53679_data(x) container_of(x, struct tps53679_data, info)
> +
> +static int tps53679_identify(struct i2c_client *client,
> + struct pmbus_driver_info *info)
> +{
> + struct tps53679_data *data = to_tps53679_data(info);
> + int ret;
> +
> + /* Read the register with VOUT scaling value.*/
Comment is not very valuable. It took me a while to understand.
I would suggest to drop it.
> + ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
> + if (ret < 0)
> + return ret;
> +
> + data->vout_params = ret & GENMASK(4, 0);
> +
> + switch (data->vout_params) {
> + case TPS53679_PROT_VR13_10MV:
> + case TPS53679_PROT_VR12_5_10MV:
> + info->vrm_version = vr13;
> + break;
> + case TPS53679_PROT_VR13_5MV:
> + case TPS53679_PROT_VR12_5MV:
> + case TPS53679_PROT_IMVP8_5MV:
> + info->vrm_version = vr12;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static struct pmbus_driver_info tps53679_info = {
> + .pages = TPS53679_PAGE_NUM,
> + .format[PSC_VOLTAGE_IN] = linear,
> + .format[PSC_VOLTAGE_OUT] = vid,
> + .format[PSC_TEMPERATURE] = linear,
> + .format[PSC_CURRENT_OUT] = linear,
> + .format[PSC_POWER] = linear,
> + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
> + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
> + PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
> + PMBUS_HAVE_POUT,
> + .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
> + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
> + PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
> + PMBUS_HAVE_POUT,
> + .identify = tps53679_identify,
> +};
> +
> +static int tps53679_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct tps53679_data *data;
> +
> + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + return pmbus_do_probe(client, id, &tps53679_info);
> +}
> +
> +static const struct i2c_device_id tps53679_id[] = {
> + {"tps53679", TPS53679_PAGE_NUM},
TPS53679_PAGE_NUM is not used here.
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, tps53679_id);
> +
> +static const struct of_device_id tps53679_of_match[] = {
> + {.compatible = "ti,tps53679"},
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, tps53679_of_match);
> +
> +static struct i2c_driver tps53679_driver = {
> + .driver = {
> + .name = "tps53679",
> + .of_match_table = of_match_ptr(tps53679_of_match),
> + },
> + .probe = tps53679_probe,
> + .remove = pmbus_do_remove,
> + .id_table = tps53679_id,
> +};
> +
> +module_i2c_driver(tps53679_driver);
> +
> +MODULE_AUTHOR("Vadim Pasternak <[email protected]>");
> +MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679");
> +MODULE_LICENSE("GPL");
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