forked from Minki/linux
hwmon: (pmbus/pim4328) Add PMBus driver for PIM4006, PIM4328 and PIM4820
Add hardware monitoring support for Flex power interface modules PIM4006, PIM4328 and PIM4820. Signed-off-by: Erik Rosen <erik.rosen@metormote.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Erik Rosen
Guenter Roeck
parent
5e86f128d9
commit
317f9d808a
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@ -267,6 +267,15 @@ config SENSORS_MP2975
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This driver can also be built as a module. If so, the module will
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be called mp2975.
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config SENSORS_PIM4328
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tristate "Flex PIM4328 and compatibles"
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help
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If you say yes here you get hardware monitoring support for Flex
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PIM4328, PIM4820 and PIM4006 Power Interface Modules.
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This driver can also be built as a module. If so, the module will
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be called pim4328.
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config SENSORS_PM6764TR
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tristate "ST PM6764TR"
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help
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@ -40,3 +40,4 @@ obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
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obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
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obj-$(CONFIG_SENSORS_XDPE122) += xdpe12284.o
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obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
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obj-$(CONFIG_SENSORS_PIM4328) += pim4328.o
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233
drivers/hwmon/pmbus/pim4328.c
Normal file
233
drivers/hwmon/pmbus/pim4328.c
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@ -0,0 +1,233 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hardware monitoring driver for PIM4006, PIM4328 and PIM4820
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*
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* Copyright (c) 2021 Flextronics International Sweden AB
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*/
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pmbus.h>
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#include <linux/slab.h>
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#include "pmbus.h"
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enum chips { pim4006, pim4328, pim4820 };
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struct pim4328_data {
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enum chips id;
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struct pmbus_driver_info info;
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};
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#define to_pim4328_data(x) container_of(x, struct pim4328_data, info)
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/* PIM4006 and PIM4328 */
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#define PIM4328_MFR_READ_VINA 0xd3
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#define PIM4328_MFR_READ_VINB 0xd4
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/* PIM4006 */
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#define PIM4328_MFR_READ_IINA 0xd6
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#define PIM4328_MFR_READ_IINB 0xd7
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#define PIM4328_MFR_FET_CHECKSTATUS 0xd9
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/* PIM4328 */
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#define PIM4328_MFR_STATUS_BITS 0xd5
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/* PIM4820 */
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#define PIM4328_MFR_READ_STATUS 0xd0
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static const struct i2c_device_id pim4328_id[] = {
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{"bmr455", pim4328},
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{"pim4006", pim4006},
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{"pim4106", pim4006},
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{"pim4206", pim4006},
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{"pim4306", pim4006},
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{"pim4328", pim4328},
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{"pim4406", pim4006},
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{"pim4820", pim4820},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, pim4328_id);
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static int pim4328_read_word_data(struct i2c_client *client, int page,
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int phase, int reg)
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{
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int ret;
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if (page > 0)
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return -ENXIO;
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if (phase == 0xff)
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return -ENODATA;
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switch (reg) {
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case PMBUS_READ_VIN:
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ret = pmbus_read_word_data(client, page, phase,
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phase == 0 ? PIM4328_MFR_READ_VINA
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: PIM4328_MFR_READ_VINB);
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break;
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case PMBUS_READ_IIN:
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ret = pmbus_read_word_data(client, page, phase,
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phase == 0 ? PIM4328_MFR_READ_IINA
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: PIM4328_MFR_READ_IINB);
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break;
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default:
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ret = -ENODATA;
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}
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return ret;
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}
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static int pim4328_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
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struct pim4328_data *data = to_pim4328_data(info);
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int ret, status;
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if (page > 0)
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return -ENXIO;
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switch (reg) {
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case PMBUS_STATUS_BYTE:
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ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_BYTE);
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if (ret < 0)
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return ret;
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if (data->id == pim4006) {
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status = pmbus_read_word_data(client, page, 0xff,
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PIM4328_MFR_FET_CHECKSTATUS);
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if (status < 0)
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return status;
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if (status & 0x0630) /* Input UV */
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ret |= PB_STATUS_VIN_UV;
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} else if (data->id == pim4328) {
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status = pmbus_read_byte_data(client, page,
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PIM4328_MFR_STATUS_BITS);
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if (status < 0)
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return status;
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if (status & 0x04) /* Input UV */
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ret |= PB_STATUS_VIN_UV;
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if (status & 0x40) /* Output UV */
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ret |= PB_STATUS_NONE_ABOVE;
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} else if (data->id == pim4820) {
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status = pmbus_read_byte_data(client, page,
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PIM4328_MFR_READ_STATUS);
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if (status < 0)
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return status;
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if (status & 0x05) /* Input OV or OC */
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ret |= PB_STATUS_NONE_ABOVE;
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if (status & 0x1a) /* Input UV */
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ret |= PB_STATUS_VIN_UV;
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if (status & 0x40) /* OT */
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ret |= PB_STATUS_TEMPERATURE;
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}
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break;
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default:
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ret = -ENODATA;
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}
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return ret;
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}
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static int pim4328_probe(struct i2c_client *client)
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{
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int status;
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u8 device_id[I2C_SMBUS_BLOCK_MAX + 1];
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const struct i2c_device_id *mid;
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struct pim4328_data *data;
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struct pmbus_driver_info *info;
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struct pmbus_platform_data *pdata;
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struct device *dev = &client->dev;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_READ_BYTE_DATA
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| I2C_FUNC_SMBUS_BLOCK_DATA))
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return -ENODEV;
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data = devm_kzalloc(&client->dev, sizeof(struct pim4328_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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status = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, device_id);
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if (status < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer Model\n");
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return status;
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}
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for (mid = pim4328_id; mid->name[0]; mid++) {
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if (!strncasecmp(mid->name, device_id, strlen(mid->name)))
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break;
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}
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if (!mid->name[0]) {
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dev_err(&client->dev, "Unsupported device\n");
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return -ENODEV;
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}
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if (strcmp(client->name, mid->name))
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dev_notice(&client->dev,
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"Device mismatch: Configured %s, detected %s\n",
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client->name, mid->name);
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data->id = mid->driver_data;
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info = &data->info;
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info->pages = 1;
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info->read_byte_data = pim4328_read_byte_data;
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info->read_word_data = pim4328_read_word_data;
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pdata = devm_kzalloc(dev, sizeof(struct pmbus_platform_data),
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GFP_KERNEL);
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if (!pdata)
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return -ENOMEM;
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dev->platform_data = pdata;
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pdata->flags = PMBUS_NO_CAPABILITY | PMBUS_NO_WRITE_PROTECT;
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switch (data->id) {
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case pim4006:
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info->phases[0] = 2;
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info->func[0] = PMBUS_PHASE_VIRTUAL | PMBUS_HAVE_VIN
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT;
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info->pfunc[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN;
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info->pfunc[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN;
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break;
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case pim4328:
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info->phases[0] = 2;
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info->func[0] = PMBUS_PHASE_VIRTUAL
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| PMBUS_HAVE_VCAP | PMBUS_HAVE_VIN
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| PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT;
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info->pfunc[0] = PMBUS_HAVE_VIN;
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info->pfunc[1] = PMBUS_HAVE_VIN;
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info->format[PSC_VOLTAGE_IN] = direct;
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info->format[PSC_TEMPERATURE] = direct;
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info->format[PSC_CURRENT_OUT] = direct;
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pdata->flags |= PMBUS_USE_COEFFICIENTS_CMD;
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break;
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case pim4820:
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info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_TEMP
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| PMBUS_HAVE_IIN;
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info->format[PSC_VOLTAGE_IN] = direct;
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info->format[PSC_TEMPERATURE] = direct;
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info->format[PSC_CURRENT_IN] = direct;
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pdata->flags |= PMBUS_USE_COEFFICIENTS_CMD;
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break;
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default:
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return -ENODEV;
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}
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return pmbus_do_probe(client, info);
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}
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static struct i2c_driver pim4328_driver = {
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.driver = {
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.name = "pim4328",
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},
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.probe_new = pim4328_probe,
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.id_table = pim4328_id,
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};
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module_i2c_driver(pim4328_driver);
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MODULE_AUTHOR("Erik Rosen <erik.rosen@metormote.com>");
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MODULE_DESCRIPTION("PMBus driver for PIM4006, PIM4328, PIM4820 power interface modules");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(PMBUS);
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