On 4/12/19 1:37 PM, Patrick Venture wrote:
From: Maxim Sloyko <maxims@xxxxxxxxxx>
Add the pmbus driver for the Infineon ir38064 voltage regulator.
VOUT_MODE is not supported by the device. The driver fakes linear16
mode with exponent value -8.
The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
this driver does not enable them.
I meant to add this into the driver as comment (where people can see it
going forward). Never mind, I'll apply the patch and add it myself.
Guenter
Signed-off-by: Maxim Sloyko <maxims@xxxxxxxxxx>
Signed-off-by: Patrick Venture <venture@xxxxxxxxxx>
---
v3:
- Updated commit message to indicate behaviors.
v2:
- Cleaned up weird tabbing behavior in doc.
v1:
- Initial patchset.
---
Documentation/hwmon/ir38064 | 64 +++++++++++++++++++++++++++++++++++
drivers/hwmon/pmbus/Kconfig | 9 +++++
drivers/hwmon/pmbus/Makefile | 1 +
drivers/hwmon/pmbus/ir38064.c | 60 ++++++++++++++++++++++++++++++++
4 files changed, 134 insertions(+)
create mode 100644 Documentation/hwmon/ir38064
create mode 100644 drivers/hwmon/pmbus/ir38064.c
diff --git a/Documentation/hwmon/ir38064 b/Documentation/hwmon/ir38064
new file mode 100644
index 0000000000000..618779a329da0
--- /dev/null
+++ b/Documentation/hwmon/ir38064
@@ -0,0 +1,64 @@
+Kernel driver ir38064
+=====================
+
+Supported chips:
+ * Infineon IR38064
+ Prefix: 'ir38064'
+ Addresses scanned: -
+ Datasheet: Publicly available at the Infineon webiste
+ https://www.infineon.com/dgdl/Infineon-IR38064MTRPBF-DS-v03_07-EN.pdf?fileId=5546d462584d1d4a0158db0d9efb67ca
+
+Datasheet is not publicly available.
+
+
+Authors:
+ Maxim Sloyko <maxims@xxxxxxxxxx>
+ Patrick Venture <venture@xxxxxxxxxx>
+
+Description
+-----------
+
+IR38064 is a Single-input Voltage, Synchronous Buck Regulator, DC-DC Converter.
+
+Usage Notes
+-----------
+
+This driver does not probe for PMBus devices. You will have to instantiate
+devices explicitly.
+
+Sysfs attributes
+----------------
+
+curr1_label "iout1"
+curr1_input Measured output current
+curr1_crit Critical maximum current
+curr1_crit_alarm Current critical high alarm
+curr1_max Maximum current
+curr1_max_alarm Current high alarm
+
+in1_label "vin"
+in1_input Measured input voltage
+in1_crit Critical maximum input voltage
+in1_crit_alarm Input voltage critical high alarm
+in1_min Minimum input voltage
+in1_min_alarm Input voltage low alarm
+
+in2_label "vout1"
+in2_input Measured output voltage
+in2_lcrit Critical minimum output voltage
+in2_lcrit_alarm Output voltage critical low alarm
+in2_crit Critical maximum output voltage
+in2_crit_alarm Output voltage critical high alarm
+in2_max Maximum output voltage
+in2_max_alarm Output voltage high alarm
+in2_min Minimum output voltage
+in2_min_alarm Output voltage low alarm
+
+power1_label "pout1"
+power1_input Measured output power
+
+temp1_input Measured temperature
+temp1_crit Critical high temperature
+temp1_crit_alarm Chip temperature critical high alarm
+temp1_max Maximum temperature
+temp1_max_alarm Chip temperature high alarm
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 629cb45f8557a..de87abab990e5 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -54,6 +54,15 @@ config SENSORS_IR35221
This driver can also be built as a module. If so, the module will
be called ir35521.
+config SENSORS_IR38064
+ tristate "Infineon IR38064"
+ help
+ If you say yes here you get hardware monitoring support for Infineon
+ IR38064.
+
+ This driver can also be built as a module. If so, the module will
+ be called ir38064.
+
config SENSORS_LM25066
tristate "National Semiconductor LM25066 and compatibles"
help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index ea0e39518c216..7d1fa6b3c8c93 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
+obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
obj-$(CONFIG_SENSORS_LM25066) += lm25066.o
obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o
diff --git a/drivers/hwmon/pmbus/ir38064.c b/drivers/hwmon/pmbus/ir38064.c
new file mode 100644
index 0000000000000..4b957ebb6fa71
--- /dev/null
+++ b/drivers/hwmon/pmbus/ir38064.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for Infineon IR38064
+ *
+ * Copyright (c) 2017 Google Inc
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include "pmbus.h"
+
+static struct pmbus_driver_info ir38064_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = direct,
+ .format[PSC_CURRENT_OUT] = linear,
+ .format[PSC_POWER] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .m[PSC_VOLTAGE_OUT] = 256,
+ .b[PSC_VOLTAGE_OUT] = 0,
+ .R[PSC_VOLTAGE_OUT] = 0,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
+ | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
+ | PMBUS_HAVE_POUT,
+};
+
+static int ir38064_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ return pmbus_do_probe(client, id, &ir38064_info);
+}
+
+static const struct i2c_device_id ir38064_id[] = {
+ {"ir38064", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, ir38064_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver ir38064_driver = {
+ .driver = {
+ .name = "ir38064",
+ },
+ .probe = ir38064_probe,
+ .remove = pmbus_do_remove,
+ .id_table = ir38064_id,
+};
+
+module_i2c_driver(ir38064_driver);
+
+MODULE_AUTHOR("Maxim Sloyko <maxims@xxxxxxxxxx>");
+MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
+MODULE_LICENSE("GPL");
