[PATCH 3/8] Revert "hwmon: add SMARC-sAM67 support"
From: Michael Walle
Date: Mon Feb 23 2026 - 05:06:48 EST
This reverts commit 443b39c82c322c9f3c38bea0389fe927ba00b3b4.
I was just informed that this product is discontinued (without being
ever released to the market). Pull the plug and let's not waste any more
maintainers time.
Signed-off-by: Michael Walle <mwalle@xxxxxxxxxx>
---
Documentation/hwmon/index.rst | 1 -
Documentation/hwmon/sa67.rst | 41 ---------
MAINTAINERS | 1 -
drivers/hwmon/Kconfig | 10 ---
drivers/hwmon/Makefile | 1 -
drivers/hwmon/sa67mcu-hwmon.c | 161 ----------------------------------
6 files changed, 215 deletions(-)
delete mode 100644 Documentation/hwmon/sa67.rst
delete mode 100644 drivers/hwmon/sa67mcu-hwmon.c
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index d91dbb20c7dc..b2ca8513cfcd 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -220,7 +220,6 @@ Hardware Monitoring Kernel Drivers
q54sj108a2
qnap-mcu-hwmon
raspberrypi-hwmon
- sa67
sbrmi
sbtsi_temp
sch5627
diff --git a/Documentation/hwmon/sa67.rst b/Documentation/hwmon/sa67.rst
deleted file mode 100644
index 029c7c169b7f..000000000000
--- a/Documentation/hwmon/sa67.rst
+++ /dev/null
@@ -1,41 +0,0 @@
-.. SPDX-License-Identifier: GPL-2.0-only
-
-Kernel driver sa67mcu
-=====================
-
-Supported chips:
-
- * Kontron sa67mcu
-
- Prefix: 'sa67mcu'
-
- Datasheet: not available
-
-Authors: Michael Walle <mwalle@xxxxxxxxxx>
-
-Description
------------
-
-The sa67mcu is a board management controller which also exposes a hardware
-monitoring controller.
-
-The controller has two voltage and one temperature sensor. The values are
-hold in two 8 bit registers to form one 16 bit value. Reading the lower byte
-will also capture the high byte to make the access atomic. The unit of the
-volatge sensors are 1mV and the unit of the temperature sensor is 0.1degC.
-
-Sysfs entries
--------------
-
-The following attributes are supported.
-
-======================= ========================================================
-in0_label "VDDIN"
-in0_input Measured VDDIN voltage.
-
-in1_label "VDD_RTC"
-in1_input Measured VDD_RTC voltage.
-
-temp1_input MCU temperature. Roughly the board temperature.
-======================= ========================================================
-
diff --git a/MAINTAINERS b/MAINTAINERS
index 71f76fddebbf..d34f7057610c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -24340,7 +24340,6 @@ F: Documentation/devicetree/bindings/interrupt-controller/kontron,sl28cpld-intc.
F: Documentation/devicetree/bindings/pwm/kontron,sl28cpld-pwm.yaml
F: Documentation/devicetree/bindings/watchdog/kontron,sl28cpld-wdt.yaml
F: drivers/gpio/gpio-sl28cpld.c
-F: drivers/hwmon/sa67mcu-hwmon.c
F: drivers/hwmon/sl28cpld-hwmon.c
F: drivers/irqchip/irq-sl28cpld.c
F: drivers/pwm/pwm-sl28cpld.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 41c381764c2b..486152a8ea77 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1927,16 +1927,6 @@ config SENSORS_RASPBERRYPI_HWMON
This driver can also be built as a module. If so, the module
will be called raspberrypi-hwmon.
-config SENSORS_SA67MCU
- tristate "Kontron sa67mcu hardware monitoring driver"
- depends on MFD_SL28CPLD || COMPILE_TEST
- help
- If you say yes here you get support for the voltage and temperature
- monitor of the sa67 board management controller.
-
- This driver can also be built as a module. If so, the module
- will be called sa67mcu-hwmon.
-
config SENSORS_SL28CPLD
tristate "Kontron sl28cpld hardware monitoring driver"
depends on MFD_SL28CPLD || COMPILE_TEST
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index eade8e3b1bde..5833c807c688 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -199,7 +199,6 @@ obj-$(CONFIG_SENSORS_PT5161L) += pt5161l.o
obj-$(CONFIG_SENSORS_PWM_FAN) += pwm-fan.o
obj-$(CONFIG_SENSORS_QNAP_MCU_HWMON) += qnap-mcu-hwmon.o
obj-$(CONFIG_SENSORS_RASPBERRYPI_HWMON) += raspberrypi-hwmon.o
-obj-$(CONFIG_SENSORS_SA67MCU) += sa67mcu-hwmon.o
obj-$(CONFIG_SENSORS_SBTSI) += sbtsi_temp.o
obj-$(CONFIG_SENSORS_SBRMI) += sbrmi.o
obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o
diff --git a/drivers/hwmon/sa67mcu-hwmon.c b/drivers/hwmon/sa67mcu-hwmon.c
deleted file mode 100644
index 22f703b7b256..000000000000
--- a/drivers/hwmon/sa67mcu-hwmon.c
+++ /dev/null
@@ -1,161 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * sl67mcu hardware monitoring driver
- *
- * Copyright 2025 Kontron Europe GmbH
- */
-
-#include <linux/bitfield.h>
-#include <linux/hwmon.h>
-#include <linux/kernel.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/property.h>
-#include <linux/regmap.h>
-
-#define SA67MCU_VOLTAGE(n) (0x00 + ((n) * 2))
-#define SA67MCU_TEMP(n) (0x04 + ((n) * 2))
-
-struct sa67mcu_hwmon {
- struct regmap *regmap;
- u32 offset;
-};
-
-static int sa67mcu_hwmon_read(struct device *dev,
- enum hwmon_sensor_types type, u32 attr,
- int channel, long *input)
-{
- struct sa67mcu_hwmon *hwmon = dev_get_drvdata(dev);
- unsigned int offset;
- u8 reg[2];
- int ret;
-
- switch (type) {
- case hwmon_in:
- switch (attr) {
- case hwmon_in_input:
- offset = hwmon->offset + SA67MCU_VOLTAGE(channel);
- break;
- default:
- return -EOPNOTSUPP;
- }
- break;
- case hwmon_temp:
- switch (attr) {
- case hwmon_temp_input:
- offset = hwmon->offset + SA67MCU_TEMP(channel);
- break;
- default:
- return -EOPNOTSUPP;
- }
- break;
- default:
- return -EOPNOTSUPP;
- }
-
- /* Reading the low byte will capture the value */
- ret = regmap_bulk_read(hwmon->regmap, offset, reg, ARRAY_SIZE(reg));
- if (ret)
- return ret;
-
- *input = reg[1] << 8 | reg[0];
-
- /* Temperatures are s16 and in 0.1degC steps. */
- if (type == hwmon_temp)
- *input = sign_extend32(*input, 15) * 100;
-
- return 0;
-}
-
-static const struct hwmon_channel_info * const sa67mcu_hwmon_info[] = {
- HWMON_CHANNEL_INFO(in,
- HWMON_I_INPUT | HWMON_I_LABEL,
- HWMON_I_INPUT | HWMON_I_LABEL),
- HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
- NULL
-};
-
-static const char *const sa67mcu_hwmon_in_labels[] = {
- "VDDIN",
- "VDD_RTC",
-};
-
-static int sa67mcu_hwmon_read_string(struct device *dev,
- enum hwmon_sensor_types type, u32 attr,
- int channel, const char **str)
-{
- switch (type) {
- case hwmon_in:
- switch (attr) {
- case hwmon_in_label:
- *str = sa67mcu_hwmon_in_labels[channel];
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static const struct hwmon_ops sa67mcu_hwmon_ops = {
- .visible = 0444,
- .read = sa67mcu_hwmon_read,
- .read_string = sa67mcu_hwmon_read_string,
-};
-
-static const struct hwmon_chip_info sa67mcu_hwmon_chip_info = {
- .ops = &sa67mcu_hwmon_ops,
- .info = sa67mcu_hwmon_info,
-};
-
-static int sa67mcu_hwmon_probe(struct platform_device *pdev)
-{
- struct sa67mcu_hwmon *hwmon;
- struct device *hwmon_dev;
- int ret;
-
- if (!pdev->dev.parent)
- return -ENODEV;
-
- hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL);
- if (!hwmon)
- return -ENOMEM;
-
- hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
- if (!hwmon->regmap)
- return -ENODEV;
-
- ret = device_property_read_u32(&pdev->dev, "reg", &hwmon->offset);
- if (ret)
- return -EINVAL;
-
- hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev,
- "sa67mcu_hwmon", hwmon,
- &sa67mcu_hwmon_chip_info,
- NULL);
- if (IS_ERR(hwmon_dev))
- dev_err(&pdev->dev, "failed to register as hwmon device");
-
- return PTR_ERR_OR_ZERO(hwmon_dev);
-}
-
-static const struct of_device_id sa67mcu_hwmon_of_match[] = {
- { .compatible = "kontron,sa67mcu-hwmon", },
- {}
-};
-MODULE_DEVICE_TABLE(of, sa67mcu_hwmon_of_match);
-
-static struct platform_driver sa67mcu_hwmon_driver = {
- .probe = sa67mcu_hwmon_probe,
- .driver = {
- .name = "sa67mcu-hwmon",
- .of_match_table = sa67mcu_hwmon_of_match,
- },
-};
-module_platform_driver(sa67mcu_hwmon_driver);
-
-MODULE_DESCRIPTION("sa67mcu Hardware Monitoring Driver");
-MODULE_AUTHOR("Michael Walle <mwalle@xxxxxxxxxx>");
-MODULE_LICENSE("GPL");
--
2.47.3