--- /dev/null
+.. SPDX-License-Identifier: GPL-2.0-only
+
+Kernel driver pm6764tr
+======================
+
+Supported chips:
+
+ * ST PM6764TR
+
+ Prefix: 'pm6764tr'
+
+ Addresses scanned: -
+
+ Datasheet: http://www.st.com/resource/en/data_brief/pm6764.pdf
+
+Authors:
+ <hsu.yungteng@gmail.com>
+
+Description:
+------------
+
+This driver supports the STMicroelectronics PM6764TR chip. The PM6764TR is a high
+performance digital controller designed to power Intel’s VR12.5 processors and memories.
+
+The device utilizes digital technology to implement all control and power management
+functions to provide maximum flexibility and performance. The NVM is embedded to store
+custom configurations. The PM6764TR device features up to 4-phase programmable operation.
+
+The PM6764TR supports power state transitions featuring VFDE, and programmable DPM
+maintaining the best efficiency over all loading conditions without compromising transient
+response. The device assures fast and independent protection against load overcurrent,
+under/overvoltage and feedback disconnections.
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for STMicroelectronics digital controller PM6764TR
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include "pmbus.h"
+
+#define PM6764TR_PMBUS_READ_VOUT 0xD4
+
+static int pm6764tr_read_word_data(struct i2c_client *client, int page, int phase, int reg)
+{
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_VMON:
+ ret = pmbus_read_word_data(client, page, phase, PM6764TR_PMBUS_READ_VOUT);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static struct pmbus_driver_info pm6764tr_info = {
+ .pages = 1,
+ .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_IIN | PMBUS_HAVE_PIN |
+ PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | PMBUS_HAVE_VMON |
+ PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT |
+ PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+ .read_word_data = pm6764tr_read_word_data,
+};
+
+static int pm6764tr_probe(struct i2c_client *client)
+{
+ return pmbus_do_probe(client, &pm6764tr_info);
+}
+
+static const struct i2c_device_id pm6764tr_id[] = {
+ {"pm6764tr", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, pm6764tr_id);
+
+static const struct of_device_id __maybe_unused pm6764tr_of_match[] = {
+ {.compatible = "st,pm6764tr"},
+ {}
+};
+
+/* This is the driver that will be inserted */
+static struct i2c_driver pm6764tr_driver = {
+ .driver = {
+ .name = "pm6764tr",
+ .of_match_table = of_match_ptr(pm6764tr_of_match),
+ },
+ .probe_new = pm6764tr_probe,
+ .id_table = pm6764tr_id,
+};
+
+module_i2c_driver(pm6764tr_driver);
+
+MODULE_AUTHOR("Charles Hsu");
+MODULE_DESCRIPTION("PMBus driver for ST PM6764TR");
+MODULE_LICENSE("GPL");