kernel: fix hwmon-gsc driver

Fix hwmon-gsc driver by replacing out-of-tree hwmon-gsc driver with in-tree
driver that was merged in Linux v5.8:
 - remove the old out-of-tree module
 - add configuration for the in-tree modules

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

4 files changed, 19 insertions, 337 deletions

diff --git a/package/kernel/hwmon-gsc/Makefile b/package/kernel/hwmon-gsc/Makefile
deleted file mode 100644
index cd7d4efb10..0000000000
--- a/package/kernel/hwmon-gsc/Makefile
+++ /dev/null
@@ -1,28 +0,0 @@
-include $(TOPDIR)/rules.mk
-include $(INCLUDE_DIR)/kernel.mk
-
-PKG_NAME:=hwmon-gsc
-PKG_RELEASE:=1
-
-include $(INCLUDE_DIR)/package.mk
-
-define KernelPackage/hwmon-gsc
-  SUBMENU:=Hardware Monitoring Support
-  DEPENDS:=@TARGET_imx +kmod-hwmon-core +kmod-i2c-core
-  TITLE:=Driver for the Gateworks System Controller
-  AUTOLOAD:=$(call AutoLoad,60,gsc)
-  FILES:=$(PKG_BUILD_DIR)/gsc.ko
-endef
-
-define KernelPackage/hwmon-gsc/description
-  Kernel module for the Gateworks System Controller chips.
-endef
-
-define Build/Compile
-	$(KERNEL_MAKE) \
-		M="$(PKG_BUILD_DIR)" \
-		EXTRA_CFLAGS="$(BUILDFLAGS)" \
-		modules
-endef
-
-$(eval $(call KernelPackage,hwmon-gsc))
diff --git a/package/kernel/hwmon-gsc/src/Makefile b/package/kernel/hwmon-gsc/src/Makefile
deleted file mode 100644
index 0e54aed2e3..0000000000
--- a/package/kernel/hwmon-gsc/src/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-m := gsc.o
diff --git a/package/kernel/hwmon-gsc/src/gsc.c b/package/kernel/hwmon-gsc/src/gsc.c
deleted file mode 100644
index 737cc599b4..0000000000
--- a/package/kernel/hwmon-gsc/src/gsc.c
+++ /dev/null
@@ -1,308 +0,0 @@
-/*
- * A hwmon driver for the Gateworks System Controller 
- * Copyright (C) 2009 Gateworks Corporation
- *
- * Author: Chris Lang <clang@gateworks.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License,
- * as published by the Free Software Foundation - version 2.
- */
-
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/err.h>
-#include <linux/slab.h>
-
-#define DRV_VERSION "0.2"
-
-enum chips { gsp };
-
-/* AD7418 registers */
-#define GSP_REG_TEMP_IN		0x00
-#define GSP_REG_VIN		0x02
-#define GSP_REG_3P3		0x05
-#define GSP_REG_BAT		0x08
-#define GSP_REG_5P0		0x0b
-#define GSP_REG_CORE		0x0e
-#define GSP_REG_CPU1		0x11
-#define GSP_REG_CPU2		0x14
-#define GSP_REG_DRAM		0x17
-#define GSP_REG_EXT_BAT		0x1a
-#define GSP_REG_IO1		0x1d
-#define GSP_REG_IO2 		0x20
-#define GSP_REG_PCIE		0x23
-#define GSP_REG_CURRENT		0x26
-#define GSP_FAN_0		0x2C
-#define GSP_FAN_1		0x2E
-#define GSP_FAN_2		0x30
-#define GSP_FAN_3		0x32
-#define GSP_FAN_4		0x34
-#define GSP_FAN_5		0x36
-
-struct gsp_sensor_info {
-	const char* name;
-	int reg;
-};
-
-static const struct gsp_sensor_info gsp_sensors[] = {
-	{"temp", GSP_REG_TEMP_IN},
-	{"vin", GSP_REG_VIN},
-	{"3p3", GSP_REG_3P3},
-	{"bat", GSP_REG_BAT},
-	{"5p0", GSP_REG_5P0},
-	{"core", GSP_REG_CORE},
-	{"cpu1", GSP_REG_CPU1},
-	{"cpu2", GSP_REG_CPU2},
-	{"dram", GSP_REG_DRAM},
-	{"ext_bat", GSP_REG_EXT_BAT},
-	{"io1", GSP_REG_IO1},
-	{"io2", GSP_REG_IO2},
-	{"pci2", GSP_REG_PCIE},
-	{"current", GSP_REG_CURRENT},
-	{"fan_point0", GSP_FAN_0},
-	{"fan_point1", GSP_FAN_1},
-	{"fan_point2", GSP_FAN_2},
-	{"fan_point3", GSP_FAN_3},
-	{"fan_point4", GSP_FAN_4},
-	{"fan_point5", GSP_FAN_5},
-};
-
-struct gsp_data {
-	struct device		*hwmon_dev;
-	struct attribute_group	attrs;
-	enum chips		type;
-};
-
-static int gsp_probe(struct i2c_client *client,
-			const struct i2c_device_id *id);
-static int gsp_remove(struct i2c_client *client);
-
-static const struct i2c_device_id gsp_id[] = {
-	{ "gsp", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, gsp_id);
-
-static struct i2c_driver gsp_driver = {
-	.driver = {
-		.name	= "gsp",
-	},
-	.probe		= gsp_probe,
-	.remove		= gsp_remove,
-	.id_table	= gsp_id,
-};
-
-/* All registers are word-sized, except for the configuration registers.
- * AD7418 uses a high-byte first convention. Do NOT use those functions to
- * access the configuration registers CONF and CONF2, as they are byte-sized.
- */
-static inline int gsp_read(struct i2c_client *client, u8 reg)
-{
-	unsigned int adc = 0;
-	if (reg == GSP_REG_TEMP_IN || reg > GSP_REG_CURRENT)
-	{
-		adc |= i2c_smbus_read_byte_data(client, reg);
-		adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
-		return adc;
-	}
-	else
-	{
-		adc |= i2c_smbus_read_byte_data(client, reg);
-		adc |= i2c_smbus_read_byte_data(client, reg + 1) << 8;
-		adc |= i2c_smbus_read_byte_data(client, reg + 2) << 16;
-		return adc;
-	}
-}
-
-static inline int gsp_write(struct i2c_client *client, u8 reg, u16 value)
-{
-	i2c_smbus_write_byte_data(client, reg, value & 0xff);
-	i2c_smbus_write_byte_data(client, reg + 1, ((value >> 8) & 0xff));
-	return 1;
-}
-
-static ssize_t show_adc(struct device *dev, struct device_attribute *devattr,
-			char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	return sprintf(buf, "%d\n", gsp_read(client, gsp_sensors[attr->index].reg));
-}
-
-static ssize_t show_label(struct device *dev,
-			struct device_attribute *devattr, char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-
-	return sprintf(buf, "%s\n", gsp_sensors[attr->index].name);
-}
-
-static ssize_t store_fan(struct device *dev,
-			struct device_attribute *devattr, const char *buf, size_t count)
-{
-	u16 val;
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct i2c_client *client = to_i2c_client(dev);
-	val = simple_strtoul(buf, NULL, 10);
-	gsp_write(client, gsp_sensors[attr->index].reg, val);
-	return count;
-}
-
-static SENSOR_DEVICE_ATTR(temp0_input, S_IRUGO, show_adc, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp0_label, S_IRUGO, show_label, NULL, 0);
-
-static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_adc, NULL, 1);
-static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_label, NULL, 1);
-static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_adc, NULL, 2);
-static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_label, NULL, 2);
-static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_adc, NULL, 3);
-static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_label, NULL, 3);
-static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_adc, NULL, 4);
-static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 4);
-static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_adc, NULL, 5);
-static SENSOR_DEVICE_ATTR(in4_label, S_IRUGO, show_label, NULL, 5);
-static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_adc, NULL, 6);
-static SENSOR_DEVICE_ATTR(in5_label, S_IRUGO, show_label, NULL, 6);
-static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_adc, NULL, 7);
-static SENSOR_DEVICE_ATTR(in6_label, S_IRUGO, show_label, NULL, 7);
-static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_adc, NULL, 8);
-static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 8);
-static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_adc, NULL, 9);
-static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 9);
-static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_adc, NULL, 10);
-static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 10);
-static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_adc, NULL, 11);
-static SENSOR_DEVICE_ATTR(in10_label, S_IRUGO, show_label, NULL, 11);
-static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_adc, NULL, 12);
-static SENSOR_DEVICE_ATTR(in11_label, S_IRUGO, show_label, NULL, 12);
-static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_adc, NULL, 13);
-static SENSOR_DEVICE_ATTR(in12_label, S_IRUGO, show_label, NULL, 13);
-
-static SENSOR_DEVICE_ATTR(fan0_point0, S_IRUGO | S_IWUSR, show_adc, store_fan, 14);
-static SENSOR_DEVICE_ATTR(fan0_point1, S_IRUGO | S_IWUSR, show_adc, store_fan, 15);
-static SENSOR_DEVICE_ATTR(fan0_point2, S_IRUGO | S_IWUSR, show_adc, store_fan, 16);
-static SENSOR_DEVICE_ATTR(fan0_point3, S_IRUGO | S_IWUSR, show_adc, store_fan, 17);
-static SENSOR_DEVICE_ATTR(fan0_point4, S_IRUGO | S_IWUSR, show_adc, store_fan, 18);
-static SENSOR_DEVICE_ATTR(fan0_point5, S_IRUGO | S_IWUSR, show_adc, store_fan, 19);
-
-static struct attribute *gsp_attributes[] = {
-	&sensor_dev_attr_temp0_input.dev_attr.attr,
-	&sensor_dev_attr_in0_input.dev_attr.attr,
-	&sensor_dev_attr_in1_input.dev_attr.attr,
-	&sensor_dev_attr_in2_input.dev_attr.attr,
-	&sensor_dev_attr_in3_input.dev_attr.attr,
-	&sensor_dev_attr_in4_input.dev_attr.attr,
-	&sensor_dev_attr_in5_input.dev_attr.attr,
-	&sensor_dev_attr_in6_input.dev_attr.attr,
-	&sensor_dev_attr_in7_input.dev_attr.attr,
-	&sensor_dev_attr_in8_input.dev_attr.attr,
-	&sensor_dev_attr_in9_input.dev_attr.attr,
-	&sensor_dev_attr_in10_input.dev_attr.attr,
-	&sensor_dev_attr_in11_input.dev_attr.attr,
-	&sensor_dev_attr_in12_input.dev_attr.attr,
-
-	&sensor_dev_attr_temp0_label.dev_attr.attr,
-	&sensor_dev_attr_in0_label.dev_attr.attr,
-	&sensor_dev_attr_in1_label.dev_attr.attr,
-	&sensor_dev_attr_in2_label.dev_attr.attr,
-	&sensor_dev_attr_in3_label.dev_attr.attr,
-	&sensor_dev_attr_in4_label.dev_attr.attr,
-	&sensor_dev_attr_in5_label.dev_attr.attr,
-	&sensor_dev_attr_in6_label.dev_attr.attr,
-	&sensor_dev_attr_in7_label.dev_attr.attr,
-	&sensor_dev_attr_in8_label.dev_attr.attr,
-	&sensor_dev_attr_in9_label.dev_attr.attr,
-	&sensor_dev_attr_in10_label.dev_attr.attr,
-	&sensor_dev_attr_in11_label.dev_attr.attr,
-	&sensor_dev_attr_in12_label.dev_attr.attr,
-
-	&sensor_dev_attr_fan0_point0.dev_attr.attr,
-	&sensor_dev_attr_fan0_point1.dev_attr.attr,
-	&sensor_dev_attr_fan0_point2.dev_attr.attr,
-	&sensor_dev_attr_fan0_point3.dev_attr.attr,
-	&sensor_dev_attr_fan0_point4.dev_attr.attr,
-	&sensor_dev_attr_fan0_point5.dev_attr.attr,
-	NULL
-};
-
-
-static int gsp_probe(struct i2c_client *client,
-			 const struct i2c_device_id *id)
-{
-	struct i2c_adapter *adapter = client->adapter;
-	struct gsp_data *data;
-	int err;
-
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
-					I2C_FUNC_SMBUS_WORD_DATA)) {
-		err = -EOPNOTSUPP;
-		goto exit;
-	}
-
-	if (!(data = kzalloc(sizeof(struct gsp_data), GFP_KERNEL))) {
-		err = -ENOMEM;
-		goto exit;
-	}
-
-	i2c_set_clientdata(client, data);
-
-	data->type = id->driver_data;
-
-	switch (data->type) {
-	case 0:
-		data->attrs.attrs = gsp_attributes;
-		break;
-	}
-
-	dev_info(&client->dev, "%s chip found\n", client->name);
-
-	/* Register sysfs hooks */
-	if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
-		goto exit_free;
-
-	data->hwmon_dev = hwmon_device_register(&client->dev);
-	if (IS_ERR(data->hwmon_dev)) {
-		err = PTR_ERR(data->hwmon_dev);
-		goto exit_remove;
-	}
-
-	return 0;
-
-exit_remove:
-	sysfs_remove_group(&client->dev.kobj, &data->attrs);
-exit_free:
-	kfree(data);
-exit:
-	return err;
-}
-
-static int gsp_remove(struct i2c_client *client)
-{
-	struct gsp_data *data = i2c_get_clientdata(client);
-	hwmon_device_unregister(data->hwmon_dev);
-	sysfs_remove_group(&client->dev.kobj, &data->attrs);
-	kfree(data);
-	return 0;
-}
-
-static int __init gsp_init(void)
-{
-	return i2c_add_driver(&gsp_driver);
-}
-
-static void __exit gsp_exit(void)
-{
-	i2c_del_driver(&gsp_driver);
-}
-
-module_init(gsp_init);
-module_exit(gsp_exit);
-
-MODULE_AUTHOR("Chris Lang <clang@gateworks.com>");
-MODULE_DESCRIPTION("GSC HWMON driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_VERSION);
-
diff --git a/package/kernel/linux/modules/hwmon.mk b/package/kernel/linux/modules/hwmon.mk
index c8d79b622e..79df0471ed 100644
--- a/package/kernel/linux/modules/hwmon.mk
+++ b/package/kernel/linux/modules/hwmon.mk
@@ -108,6 +108,25 @@ endef
 $(eval $(call KernelPackage,hwmon-drivetemp))
 
 
+define KernelPackage/hwmon-gsc
+  TITLE:=Gateworks System Controller support
+  KCONFIG:=CONFIG_MFD_GATEWORKS_GSC \
+        CONFIG_SENSORS_GSC
+  FILES:= \
+	$(LINUX_DIR)/drivers/mfd/gateworks-gsc.ko \
+	$(LINUX_DIR)/drivers/hwmon/gsc-hwmon.ko
+  AUTOLOAD:=$(call AutoLoad,20,gsc-hwmon,1)
+  $(call AddDepends/hwmon,+kmod-i2c-core)
+endef
+
+define KernelPackage/hwmon-gsc/description
+ Kernel module for Gateworks System Controller with temperature sensor,
+ADCs, and FAN controller
+endef
+
+$(eval $(call KernelPackage,hwmon-gsc))
+
+
 define KernelPackage/hwmon-gpiofan
   TITLE:=Generic GPIO FAN support
   KCONFIG:=CONFIG_SENSORS_GPIO_FAN