[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/hwmon/ltc2990.c b/src/kernel/linux/v4.19/drivers/hwmon/ltc2990.c
new file mode 100644
index 0000000..2aefdc5
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/hwmon/ltc2990.c
@@ -0,0 +1,291 @@
+/*
+ * Driver for Linear Technology LTC2990 power monitor
+ *
+ * Copyright (C) 2014 Topic Embedded Products
+ * Author: Mike Looijmans <mike.looijmans@topic.nl>
+ *
+ * License: GPLv2
+ */
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#define LTC2990_STATUS 0x00
+#define LTC2990_CONTROL 0x01
+#define LTC2990_TRIGGER 0x02
+#define LTC2990_TINT_MSB 0x04
+#define LTC2990_V1_MSB 0x06
+#define LTC2990_V2_MSB 0x08
+#define LTC2990_V3_MSB 0x0A
+#define LTC2990_V4_MSB 0x0C
+#define LTC2990_VCC_MSB 0x0E
+
+#define LTC2990_IN0 BIT(0)
+#define LTC2990_IN1 BIT(1)
+#define LTC2990_IN2 BIT(2)
+#define LTC2990_IN3 BIT(3)
+#define LTC2990_IN4 BIT(4)
+#define LTC2990_CURR1 BIT(5)
+#define LTC2990_CURR2 BIT(6)
+#define LTC2990_TEMP1 BIT(7)
+#define LTC2990_TEMP2 BIT(8)
+#define LTC2990_TEMP3 BIT(9)
+#define LTC2990_NONE 0
+#define LTC2990_ALL GENMASK(9, 0)
+
+#define LTC2990_MODE0_SHIFT 0
+#define LTC2990_MODE0_MASK GENMASK(2, 0)
+#define LTC2990_MODE1_SHIFT 3
+#define LTC2990_MODE1_MASK GENMASK(1, 0)
+
+/* Enabled measurements for mode bits 2..0 */
+static const int ltc2990_attrs_ena_0[] = {
+ LTC2990_IN1 | LTC2990_IN2 | LTC2990_TEMP3,
+ LTC2990_CURR1 | LTC2990_TEMP3,
+ LTC2990_CURR1 | LTC2990_IN3 | LTC2990_IN4,
+ LTC2990_TEMP2 | LTC2990_IN3 | LTC2990_IN4,
+ LTC2990_TEMP2 | LTC2990_CURR2,
+ LTC2990_TEMP2 | LTC2990_TEMP3,
+ LTC2990_CURR1 | LTC2990_CURR2,
+ LTC2990_IN1 | LTC2990_IN2 | LTC2990_IN3 | LTC2990_IN4
+};
+
+/* Enabled measurements for mode bits 4..3 */
+static const int ltc2990_attrs_ena_1[] = {
+ LTC2990_NONE,
+ LTC2990_TEMP2 | LTC2990_IN1 | LTC2990_CURR1,
+ LTC2990_TEMP3 | LTC2990_IN3 | LTC2990_CURR2,
+ LTC2990_ALL
+};
+
+struct ltc2990_data {
+ struct i2c_client *i2c;
+ u32 mode[2];
+};
+
+/* Return the converted value from the given register in uV or mC */
+static int ltc2990_get_value(struct i2c_client *i2c, int index, int *result)
+{
+ int val;
+ u8 reg;
+
+ switch (index) {
+ case LTC2990_IN0:
+ reg = LTC2990_VCC_MSB;
+ break;
+ case LTC2990_IN1:
+ case LTC2990_CURR1:
+ case LTC2990_TEMP2:
+ reg = LTC2990_V1_MSB;
+ break;
+ case LTC2990_IN2:
+ reg = LTC2990_V2_MSB;
+ break;
+ case LTC2990_IN3:
+ case LTC2990_CURR2:
+ case LTC2990_TEMP3:
+ reg = LTC2990_V3_MSB;
+ break;
+ case LTC2990_IN4:
+ reg = LTC2990_V4_MSB;
+ break;
+ case LTC2990_TEMP1:
+ reg = LTC2990_TINT_MSB;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val = i2c_smbus_read_word_swapped(i2c, reg);
+ if (unlikely(val < 0))
+ return val;
+
+ switch (index) {
+ case LTC2990_TEMP1:
+ case LTC2990_TEMP2:
+ case LTC2990_TEMP3:
+ /* temp, 0.0625 degrees/LSB */
+ *result = sign_extend32(val, 12) * 1000 / 16;
+ break;
+ case LTC2990_CURR1:
+ case LTC2990_CURR2:
+ /* Vx-Vy, 19.42uV/LSB */
+ *result = sign_extend32(val, 14) * 1942 / 100;
+ break;
+ case LTC2990_IN0:
+ /* Vcc, 305.18uV/LSB, 2.5V offset */
+ *result = sign_extend32(val, 14) * 30518 / (100 * 1000) + 2500;
+ break;
+ case LTC2990_IN1:
+ case LTC2990_IN2:
+ case LTC2990_IN3:
+ case LTC2990_IN4:
+ /* Vx, 305.18uV/LSB */
+ *result = sign_extend32(val, 14) * 30518 / (100 * 1000);
+ break;
+ default:
+ return -EINVAL; /* won't happen, keep compiler happy */
+ }
+
+ return 0;
+}
+
+static ssize_t ltc2990_show_value(struct device *dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct ltc2990_data *data = dev_get_drvdata(dev);
+ int value;
+ int ret;
+
+ ret = ltc2990_get_value(data->i2c, attr->index, &value);
+ if (unlikely(ret < 0))
+ return ret;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", value);
+}
+
+static umode_t ltc2990_attrs_visible(struct kobject *kobj,
+ struct attribute *a, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct ltc2990_data *data = dev_get_drvdata(dev);
+ struct device_attribute *da =
+ container_of(a, struct device_attribute, attr);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+
+ int attrs_mask = LTC2990_IN0 | LTC2990_TEMP1 |
+ (ltc2990_attrs_ena_0[data->mode[0]] &
+ ltc2990_attrs_ena_1[data->mode[1]]);
+
+ if (attr->index & attrs_mask)
+ return a->mode;
+
+ return 0;
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_TEMP1);
+static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_TEMP2);
+static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_TEMP3);
+static SENSOR_DEVICE_ATTR(curr1_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_CURR1);
+static SENSOR_DEVICE_ATTR(curr2_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_CURR2);
+static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_IN0);
+static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_IN1);
+static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_IN2);
+static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_IN3);
+static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, ltc2990_show_value, NULL,
+ LTC2990_IN4);
+
+static struct attribute *ltc2990_attrs[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_curr1_input.dev_attr.attr,
+ &sensor_dev_attr_curr2_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,
+ NULL,
+};
+
+static const struct attribute_group ltc2990_group = {
+ .attrs = ltc2990_attrs,
+ .is_visible = ltc2990_attrs_visible,
+};
+__ATTRIBUTE_GROUPS(ltc2990);
+
+static int ltc2990_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct device *hwmon_dev;
+ struct ltc2990_data *data;
+ struct device_node *of_node = i2c->dev.of_node;
+
+ if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_WORD_DATA))
+ return -ENODEV;
+
+ data = devm_kzalloc(&i2c->dev, sizeof(struct ltc2990_data), GFP_KERNEL);
+ if (unlikely(!data))
+ return -ENOMEM;
+
+ data->i2c = i2c;
+
+ if (of_node) {
+ ret = of_property_read_u32_array(of_node, "lltc,meas-mode",
+ data->mode, 2);
+ if (ret < 0)
+ return ret;
+
+ if (data->mode[0] & ~LTC2990_MODE0_MASK ||
+ data->mode[1] & ~LTC2990_MODE1_MASK)
+ return -EINVAL;
+ } else {
+ ret = i2c_smbus_read_byte_data(i2c, LTC2990_CONTROL);
+ if (ret < 0)
+ return ret;
+
+ data->mode[0] = ret >> LTC2990_MODE0_SHIFT & LTC2990_MODE0_MASK;
+ data->mode[1] = ret >> LTC2990_MODE1_SHIFT & LTC2990_MODE1_MASK;
+ }
+
+ /* Setup continuous mode */
+ ret = i2c_smbus_write_byte_data(i2c, LTC2990_CONTROL,
+ data->mode[0] << LTC2990_MODE0_SHIFT |
+ data->mode[1] << LTC2990_MODE1_SHIFT);
+ if (ret < 0) {
+ dev_err(&i2c->dev, "Error: Failed to set control mode.\n");
+ return ret;
+ }
+ /* Trigger once to start continuous conversion */
+ ret = i2c_smbus_write_byte_data(i2c, LTC2990_TRIGGER, 1);
+ if (ret < 0) {
+ dev_err(&i2c->dev, "Error: Failed to start acquisition.\n");
+ return ret;
+ }
+
+ hwmon_dev = devm_hwmon_device_register_with_groups(&i2c->dev,
+ i2c->name,
+ data,
+ ltc2990_groups);
+
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+static const struct i2c_device_id ltc2990_i2c_id[] = {
+ { "ltc2990", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ltc2990_i2c_id);
+
+static struct i2c_driver ltc2990_i2c_driver = {
+ .driver = {
+ .name = "ltc2990",
+ },
+ .probe = ltc2990_i2c_probe,
+ .id_table = ltc2990_i2c_id,
+};
+
+module_i2c_driver(ltc2990_i2c_driver);
+
+MODULE_DESCRIPTION("LTC2990 Sensor Driver");
+MODULE_AUTHOR("Topic Embedded Products");
+MODULE_LICENSE("GPL v2");