linux-kernel - [PATCH v2 3/5] hwmon: pmbus: mpq8785: Add support for MPM3695 family

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Message-ID: <20250509065237.2392692-4-paweldembicki@gmail.com>
Date: Fri,  9 May 2025 08:51:07 +0200
From: Pawel Dembicki <paweldembicki@...il.com>
To: linux-hwmon@...r.kernel.org
Cc: Pawel Dembicki <paweldembicki@...il.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jonathan Corbet <corbet@....net>,
	Noah Wang <noahwang.wang@...look.com>,
	Fabio Estevam <festevam@...il.com>,
	Michal Simek <michal.simek@....com>,
	Naresh Solanki <naresh.solanki@...ements.com>,
	Grant Peltier <grantpeltier93@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Shen Lichuan <shenlichuan@...o.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Charles Hsu <ythsu0511@...il.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: [PATCH v2 3/5] hwmon: pmbus: mpq8785: Add support for MPM3695 family

Add support for the Monolithic Power Systems MPM3695 family.
It contains four devices with suffixes: -10, -20, -25 and -100.
The device is PMBus compliant and shares characteristics with the
MPM82504.

MPM3695-25 has different VOLTAGE_SCALE_LOOP register size [11:0]
and it needs to be separated because it will be configured in the next
commit.

Tested with device tree based matching (MPM3695-10).

Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>

---
v2:
  - Added whole MPM3695 family
---
 Documentation/hwmon/mpq8785.rst | 13 +++++++++----
 drivers/hwmon/pmbus/mpq8785.c   |  8 +++++++-
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/Documentation/hwmon/mpq8785.rst b/Documentation/hwmon/mpq8785.rst
index be228ee58ce2..7093e4db4f55 100644
--- a/Documentation/hwmon/mpq8785.rst
+++ b/Documentation/hwmon/mpq8785.rst
@@ -7,6 +7,7 @@ Supported chips:
 
   * MPS MPQ8785
   * MPS MPM82504
+  * MPS MPM3695 family
 
     Prefix: 'mpq8785'
 
@@ -29,6 +30,14 @@ The device can also operate in parallel with the MPM3695-100 and additional
 MPM82504 devices to provide a higher output current. The MPM82504 operates
 at high efficiency across a wide load range.
 
+The MPM3695 family is a scalable, ultra-thin, fully integrated power module with
+a PMBus interface. It offers a complete power solution that achieves up to
+10A (-10 variant), 20A (-25 variant), 25A (-20 variant), 100A (-100 variant)
+of output current with excellent load and line regulation across a wide input
+voltage range. It operates at high efficiency over a wide load range, and can
+be parallled to deliver higher current. Variants -10,-20 and -100 have different
+voltage scale configuration register range (10 bits) than -25 version (11 bits).
+
 The PMBus interface provides converter configurations and key parameters
 monitoring.
 
@@ -42,10 +51,6 @@ Fully integrated protection features include over-current protection (OCP),
 over-voltage protection (OVP), under-voltage protection (UVP), and
 over-temperature protection (OTP).
 
-All supported modules require a minimal number of readily available, standard
-external components. The MPQ8785 is available in a TLGA (5mmx6mm) package
-and the MPM82504 is available in a BGA (15mmx30mmx5.18mm) package.
-
 Device compliant with:
 
 - PMBus rev 1.3 interface.
diff --git a/drivers/hwmon/pmbus/mpq8785.c b/drivers/hwmon/pmbus/mpq8785.c
index 9a4a211b2aeb..34245d0d2125 100644
--- a/drivers/hwmon/pmbus/mpq8785.c
+++ b/drivers/hwmon/pmbus/mpq8785.c
@@ -10,7 +10,7 @@
 
 #define PMBUS_READ_TEMPERATURE_1_SIGN	BIT(9)
 
-enum chips { mpq8785, mpm82504 };
+enum chips { mpq8785, mpm82504, mpm3695, mpm3695_25 };
 
 static int mpq8785_identify(struct i2c_client *client,
 			    struct pmbus_driver_info *info)
@@ -79,6 +79,8 @@ static struct pmbus_driver_info mpq8785_info = {
 static const struct i2c_device_id mpq8785_id[] = {
 	{ "mpq8785", mpq8785 },
 	{ "mpm82504", mpm82504 },
+	{ "mpm3695", mpm3695 },
+	{ "mpm3695-25", mpm3695_25 },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, mpq8785_id);
@@ -86,6 +88,8 @@ MODULE_DEVICE_TABLE(i2c, mpq8785_id);
 static const struct of_device_id __maybe_unused mpq8785_of_match[] = {
 	{ .compatible = "mps,mpq8785", .data = (void *)mpq8785 },
 	{ .compatible = "mps,mpm82504", .data = (void *)mpm82504 },
+	{ .compatible = "mps,mpm3695", .data = (void *)mpm3695 },
+	{ .compatible = "mps,mpm3695-25", .data = (void *)mpm3695_25 },
 	{}
 };
 MODULE_DEVICE_TABLE(of, mpq8785_of_match);
@@ -110,6 +114,8 @@ static int mpq8785_probe(struct i2c_client *client)
 		info->identify = mpq8785_identify;
 		break;
 	case mpm82504:
+	case mpm3695:
+	case mpm3695_25:
 		info->format[PSC_VOLTAGE_OUT] = direct;
 		info->m[PSC_VOLTAGE_OUT] = 8;
 		info->b[PSC_VOLTAGE_OUT] = 0;
-- 
2.43.0