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Message-ID: <20250804124806.540-3-tomtsai764@gmail.com>
Date: Mon, 4 Aug 2025 20:48:05 +0800
From: ChiShih Tsai <tomtsai764@...il.com>
To: linux-hwmon@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org
Cc: jdelvare@...e.com,
linux@...ck-us.net,
robh@...nel.org,
krzk+dt@...nel.org,
conor+dt@...nel.org,
corbet@....net,
t630619@...il.com,
ChiShih Tsai <tomtsai764@...il.com>
Subject: [PATCH 2/2] hwmon: (pmbus/adm1275) add sq24905c support
Add support for sq24905c which is similar to adm1275 and other chips
of the series.
Signed-off-by: ChiShih Tsai <tomtsai764@...il.com>
---
Documentation/hwmon/adm1275.rst | 24 ++++++++++++++++--------
drivers/hwmon/pmbus/Kconfig | 5 +++--
drivers/hwmon/pmbus/adm1275.c | 27 +++++++++++++++++++--------
3 files changed, 38 insertions(+), 18 deletions(-)
diff --git a/Documentation/hwmon/adm1275.rst b/Documentation/hwmon/adm1275.rst
index 57bd7a850558..914f009f34e0 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: 'sq24905c'
+
+ Addresses scanned: -
+
+ Datasheet: https://www.silergy.com/download/downloadFile?id=5669&type=product&ftype=note
+
Author: Guenter Roeck <linux@...ck-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..7485bc6b2e8a 100644
--- a/drivers/hwmon/pmbus/Kconfig
+++ b/drivers/hwmon/pmbus/Kconfig
@@ -51,8 +51,9 @@ config SENSORS_ADM1275
tristate "Analog Devices ADM1275 and compatibles"
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.
+ Devices ADM1075, ADM1272, ADM1273, ADM1275, ADM1276, ADM1278,
+ ADM1281, 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..1c032aaac379 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);
@@ -533,8 +535,10 @@ static int adm1275_probe(struct i2c_client *client)
return ret;
}
if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
- dev_err(&client->dev, "Unsupported Manufacturer ID\n");
- return -ENODEV;
+ if (ret != 2 || strncmp(block_buffer, "SY", 2)) {
+ dev_err(&client->dev, "Unsupported Manufacturer ID\n");
+ return -ENODEV;
+ }
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
@@ -558,7 +562,8 @@ 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 +713,7 @@ 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;
@@ -786,9 +792,12 @@ static int adm1275_probe(struct i2c_client *client)
return -ENODEV;
}
- if (data->have_power_sampling &&
+ if ((data->have_power_sampling &&
of_property_read_u32(client->dev.of_node,
- "adi,power-sample-average", &avg) == 0) {
+ "adi,power-sample-average", &avg) == 0) ||
+ (data->have_power_sampling &&
+ of_property_read_u32(client->dev.of_node,
+ "silergy,power-sample-average", &avg) == 0)) {
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
BIT(__fls(avg)) != avg) {
dev_err(&client->dev,
@@ -804,8 +813,10 @@ static int adm1275_probe(struct i2c_client *client)
}
}
- if (of_property_read_u32(client->dev.of_node,
- "adi,volt-curr-sample-average", &avg) == 0) {
+ if ((of_property_read_u32(client->dev.of_node,
+ "adi,volt-curr-sample-average", &avg) == 0) ||
+ (of_property_read_u32(client->dev.of_node,
+ "silergy,volt-curr-sample-average", &avg) == 0)) {
if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
BIT(__fls(avg)) != avg) {
dev_err(&client->dev,
--
2.43.0
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