Add ST STPDDC60 pmbus client driver.
Signed-off-by: Erik Rosen <[email protected]>
---
Documentation/hwmon/index.rst | 1 +
Documentation/hwmon/stpddc60.rst | 79 +++++++++++++
MAINTAINERS | 7 ++
drivers/hwmon/pmbus/Kconfig | 10 ++
drivers/hwmon/pmbus/Makefile | 2 +
drivers/hwmon/pmbus/stpddc60.c | 188 +++++++++++++++++++++++++++++++
6 files changed, 287 insertions(+)
create mode 100644 Documentation/hwmon/stpddc60.rst
create mode 100644 drivers/hwmon/pmbus/stpddc60.c
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index fcb870ce6286..94b4fcf182cd 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -169,6 +169,7 @@ Hardware Monitoring Kernel Drivers
smsc47m192
smsc47m1
sparx5-temp
+ stpddc60
tc654
tc74
thmc50
diff --git a/Documentation/hwmon/stpddc60.rst b/Documentation/hwmon/stpddc60.rst
new file mode 100644
index 000000000000..11d5a9977e80
--- /dev/null
+++ b/Documentation/hwmon/stpddc60.rst
@@ -0,0 +1,79 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Kernel driver stpddc60
+======================
+
+Supported chips:
+
+ * ST STPDDC60
+
+ Prefix: 'stpddc60', 'bmr481'
+
+ Addresses scanned: -
+
+ Datasheet: https://flexpowermodules.com/documents/fpm-techspec-bmr481
+
+Author: Erik Rosen <[email protected]>
+
+
+Description
+-----------
+
+This driver supports hardware monitoring for ST STPDDC60 controller chip and
+compatible modules.
+
+The driver is a client driver to the core PMBus driver. Please see
+Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details
+on PMBus client drivers.
+
+
+Usage Notes
+-----------
+
+This driver does not auto-detect devices. You will have to instantiate the
+devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
+details.
+
+The vout under- and over-voltage limits are read-only for this chip.
+
+
+Platform data support
+---------------------
+
+The driver supports standard PMBus driver platform data.
+
+
+Sysfs entries
+-------------
+
+The following attributes are supported. Vin, iout and temp limits
+are read-write; all other attributes are read-only.
+
+=======================
========================================================
+in1_label "vin"
+in1_input Measured input voltage.
+in1_lcrit Critical minimum input voltage.
+in1_crit Critical maximum input voltage.
+in1_lcrit_alarm Input voltage critical low alarm.
+in1_crit_alarm Input voltage critical high alarm.
+
+in2_label "vout1"
+in2_input Measured output voltage.
+in2_lcrit Critical minimum output Voltage.
+in2_crit Critical maximum output voltage.
+in2_lcrit_alarm Critical output voltage critical low alarm.
+in2_crit_alarm Critical output voltage critical high alarm.
+
+curr1_label "iout1"
+curr1_input Measured output current.
+curr1_max Maximum output current.
+curr1_max_alarm Output current high alarm.
+curr1_crit Critical maximum output current.
+curr1_crit_alarm Output current critical high alarm.
+
+temp1_input Measured maximum temperature of all phases.
+temp1_max Maximum temperature limit.
+temp1_max_alarm High temperature alarm.
+temp1_crit Critical maximum temperature limit.
+temp1_crit_alarm Critical maximum temperature alarm.
+=======================
========================================================
diff --git a/MAINTAINERS b/MAINTAINERS
index 992fe3b0900a..e4c696f8eabe 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -16819,6 +16819,13 @@ L: [email protected]
S: Maintained
F: drivers/i2c/busses/i2c-stm32*
+ST STPDDC60 DRIVER
+M: Daniel Nilsson <[email protected]>
+L: [email protected]
+S: Maintained
+F: Documentation/hwmon/stpddc60.rst
+F: drivers/hwmon/pmbus/stpddc60.c
+
ST VL53L0X ToF RANGER(I2C) IIO DRIVER
M: Song Qiang <[email protected]>
L: [email protected]
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 03606d4298a4..b2becdd84b11 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -247,6 +247,16 @@ config SENSORS_Q54SJ108A2
This driver can also be built as a module. If so, the module will
be called q54sj108a2.
+config SENSORS_STPDDC60
+ tristate "ST STPDDC60"
+ help
+ If you say yes here you get hardware monitoring support for ST
+ STPDDC60 Universal Digital Multicell Controller, as well as for
+ Flex BMR481.
+
+ This driver can also be built as a module. If so, the module will
+ be called stpddc60.
+
config SENSORS_TPS40422
tristate "TI TPS40422"
help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index 6a4ba0fdc1db..ef468806238c 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -28,9 +28,11 @@ obj-$(CONFIG_SENSORS_MP2975) += mp2975.o
obj-$(CONFIG_SENSORS_PM6764TR) += pm6764tr.o
obj-$(CONFIG_SENSORS_PXE1610) += pxe1610.o
obj-$(CONFIG_SENSORS_Q54SJ108A2) += q54sj108a2.o
+obj-$(CONFIG_SENSORS_STPDDC60) += stpddc60.o
obj-$(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_XDPE122) += xdpe12284.o
obj-$(CONFIG_SENSORS_ZL6100) += zl6100.o
+
diff --git a/drivers/hwmon/pmbus/stpddc60.c b/drivers/hwmon/pmbus/stpddc60.c
new file mode 100644
index 000000000000..4e3ab260a3c2
--- /dev/null
+++ b/drivers/hwmon/pmbus/stpddc60.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for the STPDDC60 controller
+ *
+ * Copyright (c) 2021 Flextronics International Sweden AB.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/pmbus.h>
+#include "pmbus.h"
+
+enum chips { stpddc60 };
+
+static const struct i2c_device_id stpddc60_id[] = {
+ {"stpddc60", stpddc60},
+ {"bmr481", stpddc60},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, stpddc60_id);
+
+static struct pmbus_driver_info stpddc60_info = {
+ .pages = 1,
+ .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_POUT,
+};
+
+/*
+ * Convert VID value to milli-volt
+ */
+static long stpddc60_vid2mv(int val)
+{
+ long rv = 0;
+
+ if (val >= 0x01)
+ rv = 250 + (val - 1) * 5;
+
+ return rv;
+}
+
+/*
+ * Convert milli-volt to linear
+ */
+static int stpddc60_mv2l(long mv)
+{
+ int rv;
+
+ rv = (mv << 8) / 1000;
+
+ return rv;
+}
+
+/*
+ * The VOUT_COMMAND register uses the VID format but the vout alarm limit
+ * registers use the linear format so we override VOUT_MODE here to force
+ * linear format for all registers.
+ */
+static int stpddc60_read_byte_data(struct i2c_client *client, int page, int
reg)
+{
+ int ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_VOUT_MODE:
+ ret = 0x18;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Do the necessary conversions between VID and linear data format.
+ */
+static int stpddc60_read_word_data(struct i2c_client *client, int page,
+ int phase, int reg)
+{
+ int ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_READ_VOUT:
+ ret = pmbus_read_word_data(client, page, phase, reg);
+ if (ret < 0)
+ return ret;
+ ret = stpddc60_mv2l(stpddc60_vid2mv(ret));
+ break;
+ case PMBUS_VOUT_OV_FAULT_LIMIT:
+ case PMBUS_VOUT_UV_FAULT_LIMIT:
+ ret = pmbus_read_word_data(client, page, phase, reg);
+ if (ret < 0)
+ return ret;
+ ret &= 0x07ff;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * The vout under- and over-voltage limits are readonly for this chip.
+ */
+static int stpddc60_write_word_data(struct i2c_client *client, int page,
+ int reg, u16 word)
+{
+ int ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_VOUT_OV_FAULT_LIMIT:
+ ret = -EACCES;
+ break;
+ case PMBUS_VOUT_UV_FAULT_LIMIT:
+ ret = -EACCES;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+
+ return ret;
+}
+
+static int stpddc60_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int status;
+ u8 device_id[I2C_SMBUS_BLOCK_MAX + 1];
+ const struct i2c_device_id *mid;
+ struct pmbus_driver_info *info = &stpddc60_info;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_BYTE_DATA
+ | I2C_FUNC_SMBUS_BLOCK_DATA))
+ return -ENODEV;
+
+ status = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, device_id);
+ if (status < 0) {
+ dev_err(&client->dev, "Failed to read Manufacturer Model\n");
+ return status;
+ }
+ for (mid = stpddc60_id; mid->name[0]; mid++) {
+ if (!strncasecmp(mid->name, device_id, strlen(mid->name)))
+ break;
+ }
+ if (!mid->name[0]) {
+ dev_err(&client->dev, "Unsupported device\n");
+ return -ENODEV;
+ }
+
+ info->read_byte_data = stpddc60_read_byte_data;
+ info->read_word_data = stpddc60_read_word_data;
+ info->write_word_data = stpddc60_write_word_data;
+
+ return pmbus_do_probe(client, info);
+}
+
+static struct i2c_driver stpddc60_driver = {
+ .driver = {
+ .name = "stpddc60",
+ },
+ .probe = stpddc60_probe,
+ .id_table = stpddc60_id,
+};
+
+module_i2c_driver(stpddc60_driver);
+
+MODULE_AUTHOR("Erik Rosen <[email protected]>");
+MODULE_DESCRIPTION("PMBus driver for ST STPDDC60");
+MODULE_LICENSE("GPL");
--
2.20.1
