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-rw-r--r--include/linux/hwmon.h3
-rw-r--r--include/linux/mfd/gsc.h76
-rw-r--r--include/linux/platform_data/gsc_hwmon.h44
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