From cc842bd57e779ee242f6bcc88149dec4542ea563 Mon Sep 17 00:00:00 2001
From: Duke Du <dukedu83@gmail.com>
Date: Mon, 12 Sep 2022 11:01:08 +0800
Subject: [PATCH] hwmon: (pmbus) Add driver for the TEXAS TPS546D24 Buck
Converter.
Add the pmbus driver for TEXAS tps546d24 Buck Converter.
The vout mode of tps546d24 supported relative data format,
which is not supported by the PMBus core.
Signed-off-by: Duke Du <dukedu83@gmail.com>
Link: https://lore.kernel.org/r/1662951668-9849-1-git-send-email-Duke.Du@quantatw.com
[groeck: Add __maybe_unused to tps546d24_of_match declaration]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
Documentation/hwmon/index.rst | 1 +
Documentation/hwmon/tps546d24.rst | 35 +++++++++++++++
MAINTAINERS | 7 +++
drivers/hwmon/pmbus/Kconfig | 9 ++++
drivers/hwmon/pmbus/Makefile | 1 +
drivers/hwmon/pmbus/tps546d24.c | 71 +++++++++++++++++++++++++++++++
6 files changed, 124 insertions(+)
create mode 100644 Documentation/hwmon/tps546d24.rst
create mode 100644 drivers/hwmon/pmbus/tps546d24.c
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index b29d7ac794e5f..c1d11cf13eef1 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -206,6 +206,7 @@ Hardware Monitoring Kernel Drivers
tps23861
tps40422
tps53679
+ tps546d24
twl4030-madc-hwmon
ucd9000
ucd9200
diff --git a/Documentation/hwmon/tps546d24.rst b/Documentation/hwmon/tps546d24.rst
new file mode 100644
index 0000000000000..97adb8a30fc09
--- /dev/null
+++ b/Documentation/hwmon/tps546d24.rst
@@ -0,0 +1,35 @@
+.. SPDX-License-Identifier: GPL-2.0-only
+
+Kernel driver tps546d24
+=======================
+
+Supported chips:
+
+ * TI TPS546D24
+
+ Prefix: 'tps546d24'
+
+ Addresses scanned: -
+
+ Datasheet: https://www.ti.com/lit/gpn/tps546d24
+
+Author: Duke Du <dukedu83@gmail.com>
+
+
+Description
+-----------
+
+The TPS546D24A is a highly integrated, non-isolated DC/DC converter capable
+of high frequency operation and 40-A current output from a 7-mm x 5-mm
+package.
+
+Two, three, and four TPS546D24A devices can be interconnected
+to provide up to 160 A on a single output. The device has an option to
+overdrive the internal 5-V LDO with an external 5-V supply via the VDD5
+pin to improve efficiency and reduce power dissipation of the converter.
+
+
+Platform data support
+---------------------
+
+The driver supports standard PMBus driver platform data.
diff --git a/MAINTAINERS b/MAINTAINERS
index e252ea3f93805..7f40ac1735ae4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20611,6 +20611,13 @@ Q: https://patchwork.kernel.org/project/linux-integrity/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
F: drivers/char/tpm/
+TPS546D24 DRIVER
+M: Duke Du <dukedu83@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: Documentation/hwmon/tps546d24.rst
+F: drivers/hwmon/pmbus/tps546d24.c
+
TRACING
M: Steven Rostedt <rostedt@goodmis.org>
M: Ingo Molnar <mingo@redhat.com>
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 951e4a9ff2d6b..89668af672060 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -397,6 +397,15 @@ config SENSORS_TPS53679
This driver can also be built as a module. If so, the module will
be called tps53679.
+config SENSORS_TPS546D24
+ tristate "TPS546D24"
+ help
+ If you say yes here you get hardware monitoring support for TEXAS
+ TPS546D24.
+
+ This driver can also be built as a module. If so, the module will
+ be called tps546d24
+
config SENSORS_UCD9000
tristate "TI UCD90120, UCD90124, UCD90160, UCD90320, UCD9090, UCD90910"
help
diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
index e2fe86f989650..0002dbe22d528 100644
--- a/drivers/hwmon/pmbus/Makefile
+++ b/drivers/hwmon/pmbus/Makefile
@@ -41,6 +41,7 @@ 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-$(CONFIG_SENSORS_TPS546D24) += tps546d24.o
obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
obj-$(CONFIG_SENSORS_XDPE122) += xdpe12284.o
diff --git a/drivers/hwmon/pmbus/tps546d24.c b/drivers/hwmon/pmbus/tps546d24.c
new file mode 100644
index 0000000000000..435f94304ad8b
--- /dev/null
+++ b/drivers/hwmon/pmbus/tps546d24.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for TEXAS TPS546D24 buck converter
+ */
+
+#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"
+
+static struct pmbus_driver_info tps546d24_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .format[PSC_CURRENT_OUT] = linear,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_IOUT | PMBUS_HAVE_VOUT
+ | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_VOUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP,
+};
+
+static int tps546d24_probe(struct i2c_client *client)
+{
+ int reg;
+
+ reg = i2c_smbus_read_byte_data(client, PMBUS_VOUT_MODE);
+ if (reg < 0)
+ return reg;
+
+ if (reg & 0x80) {
+ int err;
+
+ err = i2c_smbus_write_byte_data(client, PMBUS_VOUT_MODE, reg & 0x7f);
+ if (err < 0)
+ return err;
+ }
+ return pmbus_do_probe(client, &tps546d24_info);
+}
+
+static const struct i2c_device_id tps546d24_id[] = {
+ {"tps546d24", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tps546d24_id);
+
+static const struct of_device_id __maybe_unused tps546d24_of_match[] = {
+ {.compatible = "ti,tps546d24"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, tps546d24_of_match);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver tps546d24_driver = {
+ .driver = {
+ .name = "tps546d24",
+ .of_match_table = of_match_ptr(tps546d24_of_match),
+ },
+ .probe_new = tps546d24_probe,
+ .id_table = tps546d24_id,
+};
+
+module_i2c_driver(tps546d24_driver);
+
+MODULE_AUTHOR("Duke Du <dukedu83@gmail.com>");
+MODULE_DESCRIPTION("PMBus driver for TI tps546d24");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);
--
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