[PATCH v2 0/2] Add sq24905c support

[PATCH v2 0/2] Add sq24905c support

[ChiShih Tsai]

v2:
 - Modify devicetree properties ID to silergy,mc09c
 - Combine to a single if statement for MFR_ID.
 - Add description, SQ24905C compatibility to the ADM1278
 - Remove two silergy properties,re-use adi properties
 - Link to v1: https://lore.kernel.org/linux-hwmon/20250804124806.540-1-tomtsai764@gmail.com/

ChiShih Tsai (2):
  dt-bindings: hwmon: adm1275: add sq24905c support
  hwmon: (pmbus/adm1275) add sq24905c support

 .../bindings/hwmon/adi,adm1275.yaml           |  9 +++++++
 Documentation/hwmon/adm1275.rst               | 24 ++++++++++++-------
 drivers/hwmon/pmbus/Kconfig                   |  3 ++-
 drivers/hwmon/pmbus/adm1275.c                 | 11 ++++++---
 4 files changed, 35 insertions(+), 12 deletions(-)

-- 
2.43.0

[PATCH v2 1/2] dt-bindings: hwmon: adm1275: add sq24905c support

[ChiShih Tsai]

Add support for sq24905c Hot-Swap Controller and Digital Power Monitor.

Signed-off-by: ChiShih Tsai <tomtsai764@gmail.com>
---
 Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
index ddb72857c846..d6a7517f2a50 100644
--- a/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
+++ b/Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml
@@ -18,6 +18,13 @@ description: |
   Datasheets:
     https://www.analog.com/en/products/adm1294.html
 
+  The SQ24905C is also a Hot-swap controller compatibility to the ADM1278,
+  the PMBUS_MFR_MODEL is MC09C
+
+  Datasheets:
+    https://www.silergy.com/
+    download/downloadFile?id=5669&type=product&ftype=note
+
 properties:
   compatible:
     enum:
@@ -30,6 +37,7 @@ properties:
       - adi,adm1281
       - adi,adm1293
       - adi,adm1294
+      - silergy,mc09c
 
   reg:
     maxItems: 1
@@ -96,6 +104,7 @@ allOf:
               - adi,adm1281
               - adi,adm1293
               - adi,adm1294
+              - silergy,mc09c
     then:
       properties:
         adi,volt-curr-sample-average:
-- 
2.43.0

Re: [PATCH v2 1/2] dt-bindings: hwmon: adm1275: add sq24905c support

[Krzysztof Kozlowski]

On 05/08/2025 14:44, ChiShih Tsai wrote:
> Add support for sq24905c Hot-Swap Controller and Digital Power Monitor.
> 
> Signed-off-by: ChiShih Tsai <tomtsai764@gmail.com>
> ---
>  Documentation/devicetree/bindings/hwmon/adi,adm1275.yaml | 9 +++++++++
>  1 file changed, 9 insertions(+)

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>


---

<form letter>
This is an automated instruction, just in case, because many review tags
are being ignored. If you know the process, you can skip it (please do
not feel offended by me posting it here - no bad intentions intended).
If you do not know the process, here is a short explanation:

Please add Acked-by/Reviewed-by/Tested-by tags when posting new versions
of patchset, under or above your Signed-off-by tag, unless patch changed
significantly (e.g. new properties added to the DT bindings). Tag is
"received", when provided in a message replied to you on the mailing
list. Tools like b4 can help here. However, there's no need to repost
patches *only* to add the tags. The upstream maintainer will do that for
tags received on the version they apply.

Full context and explanation:
https://elixir.bootlin.com/linux/v6.12-rc3/source/Documentation/process/submitting-patches.rst#L577
</form letter>

Best regards,
Krzysztof

[PATCH v2 2/2] hwmon: (pmbus/adm1275) add sq24905c support

[ChiShih Tsai]

Add support for sq24905c which is similar to adm1275 and other chips
of the series.

Signed-off-by: ChiShih Tsai <tomtsai764@gmail.com>
---
 Documentation/hwmon/adm1275.rst | 24 ++++++++++++++++--------
 drivers/hwmon/pmbus/Kconfig     |  3 ++-
 drivers/hwmon/pmbus/adm1275.c   | 11 ++++++++---
 3 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/Documentation/hwmon/adm1275.rst b/Documentation/hwmon/adm1275.rst
index 57bd7a850558..cf923f20fa52 100644
--- a/Documentation/hwmon/adm1275.rst
+++ b/Documentation/hwmon/adm1275.rst
@@ -67,6 +67,14 @@ Supported chips:
 
     Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADM1293_1294.pdf
 
+  * Silergy SQ24905C
+
+    Prefix: 'mc09c'
+
+    Addresses scanned: -
+
+    Datasheet: https://www.silergy.com/download/downloadFile?id=5669&type=product&ftype=note
+
 Author: Guenter Roeck <linux@roeck-us.net>
 
 
@@ -74,14 +82,14 @@ Description
 -----------
 
 This driver supports hardware monitoring for Analog Devices ADM1075, ADM1272,
-ADM1273, ADM1275, ADM1276, ADM1278, ADM1281, ADM1293, and ADM1294 Hot-Swap
-Controller and Digital Power Monitors.
+ADM1273, ADM1275, ADM1276, ADM1278, ADM1281, ADM1293, ADM1294, and SQ24905C
+Hot-Swap Controller and Digital Power Monitors.
 
-ADM1075, ADM1272, ADM1273, ADM1275, ADM1276, ADM1278, ADM1281, ADM1293, and
-ADM1294 are hot-swap controllers that allow a circuit board to be removed from
-or inserted into a live backplane. They also feature current and voltage
-readback via an integrated 12 bit analog-to-digital converter (ADC), accessed
-using a PMBus interface.
+ADM1075, ADM1272, ADM1273, ADM1275, ADM1276, ADM1278, ADM1281, ADM1293,
+ADM1294 and SQ24905C are hot-swap controllers that allow a circuit board to be
+removed from or inserted into a live backplane. They also feature current and
+voltage readback via an integrated 12 bit analog-to-digital converter (ADC),
+accessed using a PMBus interface.
 
 The driver is a client driver to the core PMBus driver. Please see
 Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
@@ -160,5 +168,5 @@ temp1_highest		Highest observed temperature.
 temp1_reset_history	Write any value to reset history.
 
 			Temperature attributes are supported on ADM1272,
-			ADM1273, ADM1278, and ADM1281.
+			ADM1273, ADM1278, ADM1281 and SQ24905C.
 ======================= =======================================================
diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
index 55e492452ce8..77add0c6ee53 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -52,7 +52,8 @@ config SENSORS_ADM1275
 	help
 	  If you say yes here you get hardware monitoring support for Analog
 	  Devices ADM1075, ADM1272, ADM1273, ADM1275, ADM1276, ADM1278, ADM1281,
-	  ADM1293, and ADM1294 Hot-Swap Controller and Digital Power Monitors.
+	  ADM1293, ADM1294 and SQ24905C Hot-Swap Controller and
+	  Digital Power Monitors.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called adm1275.
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
index 7d175baa5de2..bc2a6a07dc3e 100644
--- a/drivers/hwmon/pmbus/adm1275.c
+++ b/drivers/hwmon/pmbus/adm1275.c
@@ -18,7 +18,8 @@
 #include <linux/log2.h>
 #include "pmbus.h"
 
-enum chips { adm1075, adm1272, adm1273, adm1275, adm1276, adm1278, adm1281, adm1293, adm1294 };
+enum chips { adm1075, adm1272, adm1273, adm1275, adm1276, adm1278, adm1281,
+	 adm1293, adm1294, sq24905c };
 
 #define ADM1275_MFR_STATUS_IOUT_WARN2	BIT(0)
 #define ADM1293_MFR_STATUS_VAUX_UV_WARN	BIT(5)
@@ -486,6 +487,7 @@ static const struct i2c_device_id adm1275_id[] = {
 	{ "adm1281", adm1281 },
 	{ "adm1293", adm1293 },
 	{ "adm1294", adm1294 },
+	{ "mc09c", sq24905c },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, adm1275_id);
@@ -532,7 +534,8 @@ static int adm1275_probe(struct i2c_client *client)
 		dev_err(&client->dev, "Failed to read Manufacturer ID\n");
 		return ret;
 	}
-	if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
+	if ((ret != 3 || strncmp(block_buffer, "ADI", 3)) &&
+	    (ret != 2 || strncmp(block_buffer, "SY", 2))) {
 		dev_err(&client->dev, "Unsupported Manufacturer ID\n");
 		return -ENODEV;
 	}
@@ -558,7 +561,8 @@ static int adm1275_probe(struct i2c_client *client)
 
 	if (mid->driver_data == adm1272 || mid->driver_data == adm1273 ||
 	    mid->driver_data == adm1278 || mid->driver_data == adm1281 ||
-	    mid->driver_data == adm1293 || mid->driver_data == adm1294)
+	    mid->driver_data == adm1293 || mid->driver_data == adm1294 ||
+	    mid->driver_data == sq24905c)
 		config_read_fn = i2c_smbus_read_word_data;
 	else
 		config_read_fn = i2c_smbus_read_byte_data;
@@ -708,6 +712,7 @@ static int adm1275_probe(struct i2c_client *client)
 		break;
 	case adm1278:
 	case adm1281:
+	case sq24905c:
 		data->have_vout = true;
 		data->have_pin_max = true;
 		data->have_temp_max = true;
-- 
2.43.0