hwmon: (pmbus) Driver for Delta power supplies Q54SJ108A2
The driver supports Q54SJ108A2 series modules of Delta. Standard attributes are in sysfs, and other attributes are in debugfs. Signed-off-by: xiao.ma <xiao.mx.ma@deltaww.com> Link: https://lore.kernel.org/r/20201202025900.1842-1-max701@126.com [groeck: Replaced spaces with tabs, dropped excessive spaces, fixed module prefix in documentation] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
xiao.ma
Guenter Roeck
Родитель
7537862a90
Коммит
d014538aa3
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@ -151,6 +151,7 @@ Hardware Monitoring Kernel Drivers
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powr1220
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pxe1610
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pwm-fan
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q54sj108a2
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raspberrypi-hwmon
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sch5627
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sch5636
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@ -0,0 +1,54 @@
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.. SPDX-License-Identifier: GPL-2.0-or-later
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Kernel driver q54sj108a2
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=====================
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Supported chips:
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* DELTA Q54SJ108A2NCAH, Q54SJ108A2NCDH, Q54SJ108A2NCPG, Q54SJ108A2NCPH
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Prefix: 'q54sj108a2'
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Addresses scanned: -
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Datasheet: https://filecenter.delta-china.com.cn/products/download/01/0102/datasheet/DS_Q54SJ108A2.pdf
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Authors:
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Xiao.ma <xiao.mx.ma@deltaww.com>
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Description
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-----------
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This driver implements support for DELTA Q54SJ108A2NCAH, Q54SJ108A2NCDH,
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Q54SJ108A2NCPG, and Q54SJ108A2NCPH 1/4 Brick DC/DC Regulated Power Module
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with PMBus support.
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The driver is a client driver to the core PMBus driver.
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Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
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details.
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Sysfs entries
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-------------
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===================== ===== ==================================================
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curr1_alarm RO Output current alarm
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curr1_input RO Output current
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curr1_label RO 'iout1'
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in1_alarm RO Input voltage alarm
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in1_input RO Input voltage
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in1_label RO 'vin'
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in2_alarm RO Output voltage alarm
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in2_input RO Output voltage
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in2_label RO 'vout1'
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temp1_alarm RO Temperature alarm
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temp1_input RO Chip temperature
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===================== ===== ==================================================
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@ -238,6 +238,15 @@ config SENSORS_PXE1610
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This driver can also be built as a module. If so, the module will
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be called pxe1610.
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config SENSORS_Q54SJ108A2
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tristate "Delta Power Supplies Q54SJ108A2"
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help
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If you say yes here you get hardware monitoring support for Delta
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Q54SJ108A2 series Power Supplies.
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This driver can also be built as a module. If so, the module will
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be called q54sj108a2.
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config SENSORS_TPS40422
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tristate "TI TPS40422"
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help
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@ -27,6 +27,7 @@ obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
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obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
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obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o
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obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o
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obj-$(CONFIG_SENSORS_Q54SJ108A2) += q54sj108a2.o
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obj-$(CONFIG_SENSORS_TPS40422) += tps40422.o
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obj-$(CONFIG_SENSORS_TPS53679) += tps53679.o
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obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
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@ -0,0 +1,422 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Delta modules, Q54SJ108A2 series 1/4 Brick DC/DC
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* Regulated Power Module
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*
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* Copyright 2020 Delta LLC.
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*/
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#include <linux/debugfs.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include "pmbus.h"
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#define STORE_DEFAULT_ALL 0x11
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#define ERASE_BLACKBOX_DATA 0xD1
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#define READ_HISTORY_EVENT_NUMBER 0xD2
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#define READ_HISTORY_EVENTS 0xE0
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#define SET_HISTORY_EVENT_OFFSET 0xE1
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#define PMBUS_FLASH_KEY_WRITE 0xEC
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enum chips {
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q54sj108a2
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};
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enum {
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Q54SJ108A2_DEBUGFS_OPERATION = 0,
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Q54SJ108A2_DEBUGFS_CLEARFAULT,
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Q54SJ108A2_DEBUGFS_WRITEPROTECT,
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Q54SJ108A2_DEBUGFS_STOREDEFAULT,
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Q54SJ108A2_DEBUGFS_VOOV_RESPONSE,
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Q54SJ108A2_DEBUGFS_IOOC_RESPONSE,
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Q54SJ108A2_DEBUGFS_PMBUS_VERSION,
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Q54SJ108A2_DEBUGFS_MFR_ID,
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Q54SJ108A2_DEBUGFS_MFR_MODEL,
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Q54SJ108A2_DEBUGFS_MFR_REVISION,
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Q54SJ108A2_DEBUGFS_MFR_LOCATION,
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Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE,
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Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET,
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Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET,
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Q54SJ108A2_DEBUGFS_BLACKBOX_READ,
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Q54SJ108A2_DEBUGFS_FLASH_KEY,
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Q54SJ108A2_DEBUGFS_NUM_ENTRIES
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};
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struct q54sj108a2_data {
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enum chips chip;
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struct i2c_client *client;
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int debugfs_entries[Q54SJ108A2_DEBUGFS_NUM_ENTRIES];
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};
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#define to_psu(x, y) container_of((x), struct q54sj108a2_data, debugfs_entries[(y)])
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static struct pmbus_driver_info q54sj108a2_info[] = {
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[q54sj108a2] = {
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.pages = 1,
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/* Source : Delta Q54SJ108A2 */
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.func[0] = PMBUS_HAVE_VIN |
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_STATUS_INPUT,
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},
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};
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static ssize_t q54sj108a2_debugfs_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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int rc;
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int *idxp = file->private_data;
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int idx = *idxp;
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struct q54sj108a2_data *psu = to_psu(idxp, idx);
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char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
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char data_char[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
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char *res;
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switch (idx) {
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case Q54SJ108A2_DEBUGFS_OPERATION:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_WRITEPROTECT:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_REVISION);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_MFR_ID:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_ID, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_MODEL:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_REVISION:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_REVISION, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_LOCATION:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_LOCATION, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
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rc = i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_READ:
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rc = i2c_smbus_read_block_data(psu->client, READ_HISTORY_EVENTS, data);
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if (rc < 0)
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return rc;
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res = bin2hex(data, data_char, 32);
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rc = res - data;
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break;
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case Q54SJ108A2_DEBUGFS_FLASH_KEY:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, data);
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if (rc < 0)
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return rc;
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res = bin2hex(data, data_char, 4);
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rc = res - data;
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break;
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default:
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return -EINVAL;
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}
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data[rc] = '\n';
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rc += 2;
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return simple_read_from_buffer(buf, count, ppos, data, rc);
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}
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static ssize_t q54sj108a2_debugfs_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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u8 flash_key[4];
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u8 dst_data;
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ssize_t rc;
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int *idxp = file->private_data;
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int idx = *idxp;
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struct q54sj108a2_data *psu = to_psu(idxp, idx);
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
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if (rc)
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return rc;
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switch (idx) {
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case Q54SJ108A2_DEBUGFS_OPERATION:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_OPERATION, dst_data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_CLEARFAULT:
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rc = i2c_smbus_write_byte(psu->client, PMBUS_CLEAR_FAULTS);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_STOREDEFAULT:
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flash_key[0] = 0x7E;
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flash_key[1] = 0x15;
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flash_key[2] = 0xDC;
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flash_key[3] = 0x42;
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rc = i2c_smbus_write_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, 4, flash_key);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte(psu->client, STORE_DEFAULT_ALL);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE, dst_data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE, dst_data);
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if (rc < 0)
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return rc;
|
||||
|
||||
break;
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||||
case Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE:
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rc = i2c_smbus_write_byte(psu->client, ERASE_BLACKBOX_DATA);
|
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if (rc < 0)
|
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return rc;
|
||||
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET:
|
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
|
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if (rc < 0)
|
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return rc;
|
||||
|
||||
rc = i2c_smbus_write_byte_data(psu->client, SET_HISTORY_EVENT_OFFSET, dst_data);
|
||||
if (rc < 0)
|
||||
return rc;
|
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break;
|
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default:
|
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return -EINVAL;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
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|
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static const struct file_operations q54sj108a2_fops = {
|
||||
.llseek = noop_llseek,
|
||||
.read = q54sj108a2_debugfs_read,
|
||||
.write = q54sj108a2_debugfs_write,
|
||||
.open = simple_open,
|
||||
};
|
||||
|
||||
static const struct i2c_device_id q54sj108a2_id[] = {
|
||||
{ "q54sj108a2", q54sj108a2 },
|
||||
{ },
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(i2c, q54sj108a2_id);
|
||||
|
||||
static int q54sj108a2_probe(struct i2c_client *client)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
|
||||
enum chips chip_id;
|
||||
int ret, i;
|
||||
struct dentry *debugfs;
|
||||
struct dentry *q54sj108a2_dir;
|
||||
struct q54sj108a2_data *psu;
|
||||
|
||||
if (!i2c_check_functionality(client->adapter,
|
||||
I2C_FUNC_SMBUS_BYTE_DATA |
|
||||
I2C_FUNC_SMBUS_WORD_DATA |
|
||||
I2C_FUNC_SMBUS_BLOCK_DATA))
|
||||
return -ENODEV;
|
||||
|
||||
if (client->dev.of_node)
|
||||
chip_id = (enum chips)(unsigned long)of_device_get_match_data(dev);
|
||||
else
|
||||
chip_id = i2c_match_id(q54sj108a2_id, client)->driver_data;
|
||||
|
||||
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "Failed to read Manufacturer ID\n");
|
||||
return ret;
|
||||
}
|
||||
if (ret != 5 || strncmp(buf, "DELTA", 5)) {
|
||||
buf[ret] = '\0';
|
||||
dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
/*
|
||||
* The chips support reading PMBUS_MFR_MODEL.
|
||||
*/
|
||||
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Failed to read Manufacturer Model\n");
|
||||
return ret;
|
||||
}
|
||||
if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
|
||||
buf[ret] = '\0';
|
||||
dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
|
||||
if (ret < 0) {
|
||||
dev_err(dev, "Failed to read Manufacturer Revision\n");
|
||||
return ret;
|
||||
}
|
||||
if (ret != 4 || buf[0] != 'S') {
|
||||
buf[ret] = '\0';
|
||||
dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
ret = pmbus_do_probe(client, &q54sj108a2_info[chip_id]);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
|
||||
if (!psu)
|
||||
return 0;
|
||||
|
||||
psu->client = client;
|
||||
|
||||
debugfs = pmbus_get_debugfs_dir(client);
|
||||
|
||||
q54sj108a2_dir = debugfs_create_dir(client->name, debugfs);
|
||||
|
||||
for (i = 0; i < Q54SJ108A2_DEBUGFS_NUM_ENTRIES; ++i)
|
||||
psu->debugfs_entries[i] = i;
|
||||
|
||||
debugfs_create_file("operation", 0644, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_OPERATION],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("clear_fault", 0200, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_CLEARFAULT],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("write_protect", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_WRITEPROTECT],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("store_default", 0200, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_STOREDEFAULT],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("vo_ov_response", 0644, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_VOOV_RESPONSE],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("io_oc_response", 0644, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_IOOC_RESPONSE],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("pmbus_revision", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_PMBUS_VERSION],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("mfr_id", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_ID],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("mfr_model", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_MODEL],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("mfr_revision", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_REVISION],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("mfr_location", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_LOCATION],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("blackbox_erase", 0200, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("blackbox_read_offset", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("blackbox_set_offset", 0200, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("blackbox_read", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ],
|
||||
&q54sj108a2_fops);
|
||||
debugfs_create_file("flash_key", 0444, q54sj108a2_dir,
|
||||
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_FLASH_KEY],
|
||||
&q54sj108a2_fops);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id q54sj108a2_of_match[] = {
|
||||
{ .compatible = "delta,q54sj108a2", .data = (void *)q54sj108a2 },
|
||||
{ },
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(of, q54sj108a2_of_match);
|
||||
|
||||
static struct i2c_driver q54sj108a2_driver = {
|
||||
.driver = {
|
||||
.name = "q54sj108a2",
|
||||
.of_match_table = q54sj108a2_of_match,
|
||||
},
|
||||
.probe_new = q54sj108a2_probe,
|
||||
.id_table = q54sj108a2_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(q54sj108a2_driver);
|
||||
|
||||
MODULE_AUTHOR("Xiao.Ma <xiao.mx.ma@deltaww.com>");
|
||||
MODULE_DESCRIPTION("PMBus driver for Delta Q54SJ108A2 series modules");
|
||||
MODULE_LICENSE("GPL");
|
||||
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