Merge tag 'hwmon-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 "Infrastructure:
   - Add notification support

  New drivers:
   - Baikal-T1 PVT sensor driver
   - amd_energy driver to report energy counters
   - Driver for Maxim MAX16601
   - Gateworks System Controller

  Various:
   - applesmc: avoid overlong udelay()
   - dell-smm: Use one DMI match for all XPS models
   - ina2xx: Implement alert functions
   - lm70: Add support for ACPI
   - lm75: Fix coding-style warnings
   - lm90: Add max6654 support to lm90 driver
   - nct7802: Replace container_of() API
   - nct7904: Set default timeout
   - nct7904: Add watchdog function
   - pmbus: Improve initialization of 'currpage' and 'currphase'"

* tag 'hwmon-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (24 commits)
  hwmon: Add Baikal-T1 PVT sensor driver
  hwmon: Add notification support
  dt-bindings: hwmon: Add Baikal-T1 PVT sensor binding
  hwmon: (applesmc) avoid overlong udelay()
  hwmon: (nct7904) Set default timeout
  hwmon: (amd_energy) Missing platform_driver_unregister() on error in amd_energy_init()
  MAINTAINERS: add entry for AMD energy driver
  hwmon: (amd_energy) Add documentation
  hwmon: Add amd_energy driver to report energy counters
  hwmon: (nct7802) Replace container_of() API
  hwmon: (lm90) Add max6654 support to lm90 driver
  hwmon : (nct6775) Use kobj_to_dev() API
  hwmon: (pmbus) Driver for Maxim MAX16601
  hwmon: (pmbus) Improve initialization of 'currpage' and 'currphase'
  hwmon: (adt7411) update contact email
  hwmon: (lm75) Fix all coding-style warnings on lm75 driver
  hwmon: Reduce indentation level in __hwmon_device_register()
  hwmon: (ina2xx) Implement alert functions
  hwmon: (lm70) Add support for ACPI
  hwmon: (dell-smm) Use one DMI match for all XPS models
  ...

3 files changed, 123 insertions, 0 deletions

diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index 5e609f25878c..363d4a814aa1 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -436,6 +436,9 @@ devm_hwmon_device_register_with_info(struct device *dev,
 void hwmon_device_unregister(struct device *dev);
 void devm_hwmon_device_unregister(struct device *dev);
 
+int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
+		       u32 attr, int channel);
+
 /**
  * hwmon_is_bad_char - Is the char invalid in a hwmon name
  * @ch: the char to be considered
diff --git a/include/linux/mfd/gsc.h b/include/linux/mfd/gsc.h
new file mode 100644
index 000000000000..6bd639c285b4
--- /dev/null
+++ b/include/linux/mfd/gsc.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2020 Gateworks Corporation
+ */
+#ifndef __LINUX_MFD_GSC_H_
+#define __LINUX_MFD_GSC_H_
+
+#include <linux/regmap.h>
+
+/* Device Addresses */
+#define GSC_MISC	0x20
+#define GSC_UPDATE	0x21
+#define GSC_GPIO	0x23
+#define GSC_HWMON	0x29
+#define GSC_EEPROM0	0x50
+#define GSC_EEPROM1	0x51
+#define GSC_EEPROM2	0x52
+#define GSC_EEPROM3	0x53
+#define GSC_RTC		0x68
+
+/* Register offsets */
+enum {
+	GSC_CTRL_0	= 0x00,
+	GSC_CTRL_1	= 0x01,
+	GSC_TIME	= 0x02,
+	GSC_TIME_ADD	= 0x06,
+	GSC_IRQ_STATUS	= 0x0A,
+	GSC_IRQ_ENABLE	= 0x0B,
+	GSC_FW_CRC	= 0x0C,
+	GSC_FW_VER	= 0x0E,
+	GSC_WP		= 0x0F,
+};
+
+/* Bit definitions */
+#define GSC_CTRL_0_PB_HARD_RESET	0
+#define GSC_CTRL_0_PB_CLEAR_SECURE_KEY	1
+#define GSC_CTRL_0_PB_SOFT_POWER_DOWN	2
+#define GSC_CTRL_0_PB_BOOT_ALTERNATE	3
+#define GSC_CTRL_0_PERFORM_CRC		4
+#define GSC_CTRL_0_TAMPER_DETECT	5
+#define GSC_CTRL_0_SWITCH_HOLD		6
+
+#define GSC_CTRL_1_SLEEP_ENABLE		0
+#define GSC_CTRL_1_SLEEP_ACTIVATE	1
+#define GSC_CTRL_1_SLEEP_ADD		2
+#define GSC_CTRL_1_SLEEP_NOWAKEPB	3
+#define GSC_CTRL_1_WDT_TIME		4
+#define GSC_CTRL_1_WDT_ENABLE		5
+#define GSC_CTRL_1_SWITCH_BOOT_ENABLE	6
+#define GSC_CTRL_1_SWITCH_BOOT_CLEAR	7
+
+#define GSC_IRQ_PB			0
+#define GSC_IRQ_KEY_ERASED		1
+#define GSC_IRQ_EEPROM_WP		2
+#define GSC_IRQ_RESV			3
+#define GSC_IRQ_GPIO			4
+#define GSC_IRQ_TAMPER			5
+#define GSC_IRQ_WDT_TIMEOUT		6
+#define GSC_IRQ_SWITCH_HOLD		7
+
+int gsc_read(void *context, unsigned int reg, unsigned int *val);
+int gsc_write(void *context, unsigned int reg, unsigned int val);
+
+struct gsc_dev {
+	struct device *dev;
+
+	struct i2c_client *i2c;		/* 0x20: interrupt controller, WDT */
+	struct i2c_client *i2c_hwmon;	/* 0x29: hwmon, fan controller */
+
+	struct regmap *regmap;
+
+	unsigned int fwver;
+	unsigned short fwcrc;
+};
+
+#endif /* __LINUX_MFD_GSC_H_ */
diff --git a/include/linux/platform_data/gsc_hwmon.h b/include/linux/platform_data/gsc_hwmon.h
new file mode 100644
index 000000000000..ec1611aff863
--- /dev/null
+++ b/include/linux/platform_data/gsc_hwmon.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _GSC_HWMON_H
+#define _GSC_HWMON_H
+
+enum gsc_hwmon_mode {
+	mode_temperature,
+	mode_voltage,
+	mode_voltage_raw,
+	mode_max,
+};
+
+/**
+ * struct gsc_hwmon_channel - configuration parameters
+ * @reg:  I2C register offset
+ * @mode: channel mode
+ * @name: channel name
+ * @mvoffset: voltage offset
+ * @vdiv: voltage divider array (2 resistor values in milli-ohms)
+ */
+struct gsc_hwmon_channel {
+	unsigned int reg;
+	unsigned int mode;
+	const char *name;
+	unsigned int mvoffset;
+	unsigned int vdiv[2];
+};
+
+/**
+ * struct gsc_hwmon_platform_data - platform data for gsc_hwmon driver
+ * @channels:	pointer to array of gsc_hwmon_channel structures
+ *		describing channels
+ * @nchannels:	number of elements in @channels array
+ * @vreference: voltage reference (mV)
+ * @resolution: ADC bit resolution
+ * @fan_base: register base for FAN controller
+ */
+struct gsc_hwmon_platform_data {
+	const struct gsc_hwmon_channel *channels;
+	int nchannels;
+	unsigned int resolution;
+	unsigned int vreference;
+	unsigned int fan_base;
+};
+#endif