[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/hwmon/lm95241.c b/src/kernel/linux/v4.14/drivers/hwmon/lm95241.c
new file mode 100644
index 0000000..8c573e6
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/hwmon/lm95241.c
@@ -0,0 +1,509 @@
+/*
+ * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com>
+ *
+ * The LM95241 is a sensor chip made by National Semiconductors.
+ * It reports up to three temperatures (its own plus up to two external ones).
+ * Complete datasheet can be obtained from National's website at:
+ * http://www.national.com/ds.cgi/LM/LM95241.pdf
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#define DEVNAME "lm95241"
+
+static const unsigned short normal_i2c[] = {
+ 0x19, 0x2a, 0x2b, I2C_CLIENT_END };
+
+/* LM95241 registers */
+#define LM95241_REG_R_MAN_ID 0xFE
+#define LM95241_REG_R_CHIP_ID 0xFF
+#define LM95241_REG_R_STATUS 0x02
+#define LM95241_REG_RW_CONFIG 0x03
+#define LM95241_REG_RW_REM_FILTER 0x06
+#define LM95241_REG_RW_TRUTHERM 0x07
+#define LM95241_REG_W_ONE_SHOT 0x0F
+#define LM95241_REG_R_LOCAL_TEMPH 0x10
+#define LM95241_REG_R_REMOTE1_TEMPH 0x11
+#define LM95241_REG_R_REMOTE2_TEMPH 0x12
+#define LM95241_REG_R_LOCAL_TEMPL 0x20
+#define LM95241_REG_R_REMOTE1_TEMPL 0x21
+#define LM95241_REG_R_REMOTE2_TEMPL 0x22
+#define LM95241_REG_RW_REMOTE_MODEL 0x30
+
+/* LM95241 specific bitfields */
+#define CFG_STOP BIT(6)
+#define CFG_CR0076 0x00
+#define CFG_CR0182 BIT(4)
+#define CFG_CR1000 BIT(5)
+#define CFG_CR2700 (BIT(4) | BIT(5))
+#define CFG_CRMASK (BIT(4) | BIT(5))
+#define R1MS_MASK BIT(0)
+#define R2MS_MASK BIT(2)
+#define R1DF_MASK BIT(1)
+#define R2DF_MASK BIT(2)
+#define R1FE_MASK BIT(0)
+#define R2FE_MASK BIT(2)
+#define R1DM BIT(0)
+#define R2DM BIT(1)
+#define TT1_SHIFT 0
+#define TT2_SHIFT 4
+#define TT_OFF 0
+#define TT_ON 1
+#define TT_MASK 7
+#define NATSEMI_MAN_ID 0x01
+#define LM95231_CHIP_ID 0xA1
+#define LM95241_CHIP_ID 0xA4
+
+static const u8 lm95241_reg_address[] = {
+ LM95241_REG_R_LOCAL_TEMPH,
+ LM95241_REG_R_LOCAL_TEMPL,
+ LM95241_REG_R_REMOTE1_TEMPH,
+ LM95241_REG_R_REMOTE1_TEMPL,
+ LM95241_REG_R_REMOTE2_TEMPH,
+ LM95241_REG_R_REMOTE2_TEMPL
+};
+
+/* Client data (each client gets its own) */
+struct lm95241_data {
+ struct i2c_client *client;
+ struct mutex update_lock;
+ unsigned long last_updated; /* in jiffies */
+ unsigned long interval; /* in milli-seconds */
+ char valid; /* zero until following fields are valid */
+ /* registers values */
+ u8 temp[ARRAY_SIZE(lm95241_reg_address)];
+ u8 status, config, model, trutherm;
+};
+
+/* Conversions */
+static int temp_from_reg_signed(u8 val_h, u8 val_l)
+{
+ s16 val_hl = (val_h << 8) | val_l;
+ return val_hl * 1000 / 256;
+}
+
+static int temp_from_reg_unsigned(u8 val_h, u8 val_l)
+{
+ u16 val_hl = (val_h << 8) | val_l;
+ return val_hl * 1000 / 256;
+}
+
+static struct lm95241_data *lm95241_update_device(struct device *dev)
+{
+ struct lm95241_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated
+ + msecs_to_jiffies(data->interval)) ||
+ !data->valid) {
+ int i;
+
+ dev_dbg(dev, "Updating lm95241 data.\n");
+ for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++)
+ data->temp[i]
+ = i2c_smbus_read_byte_data(client,
+ lm95241_reg_address[i]);
+
+ data->status = i2c_smbus_read_byte_data(client,
+ LM95241_REG_R_STATUS);
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+static int lm95241_read_chip(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct lm95241_data *data = dev_get_drvdata(dev);
+
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ *val = data->interval;
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int lm95241_read_temp(struct device *dev, u32 attr, int channel,
+ long *val)
+{
+ struct lm95241_data *data = lm95241_update_device(dev);
+
+ switch (attr) {
+ case hwmon_temp_input:
+ if (!channel || (data->config & BIT(channel - 1)))
+ *val = temp_from_reg_signed(data->temp[channel * 2],
+ data->temp[channel * 2 + 1]);
+ else
+ *val = temp_from_reg_unsigned(data->temp[channel * 2],
+ data->temp[channel * 2 + 1]);
+ return 0;
+ case hwmon_temp_min:
+ if (channel == 1)
+ *val = (data->config & R1DF_MASK) ? -128000 : 0;
+ else
+ *val = (data->config & R2DF_MASK) ? -128000 : 0;
+ return 0;
+ case hwmon_temp_max:
+ if (channel == 1)
+ *val = (data->config & R1DF_MASK) ? 127875 : 255875;
+ else
+ *val = (data->config & R2DF_MASK) ? 127875 : 255875;
+ return 0;
+ case hwmon_temp_type:
+ if (channel == 1)
+ *val = (data->model & R1MS_MASK) ? 1 : 2;
+ else
+ *val = (data->model & R2MS_MASK) ? 1 : 2;
+ return 0;
+ case hwmon_temp_fault:
+ if (channel == 1)
+ *val = !!(data->status & R1DM);
+ else
+ *val = !!(data->status & R2DM);
+ return 0;
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int lm95241_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ switch (type) {
+ case hwmon_chip:
+ return lm95241_read_chip(dev, attr, channel, val);
+ case hwmon_temp:
+ return lm95241_read_temp(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int lm95241_write_chip(struct device *dev, u32 attr, int channel,
+ long val)
+{
+ struct lm95241_data *data = dev_get_drvdata(dev);
+ int convrate;
+ u8 config;
+ int ret;
+
+ mutex_lock(&data->update_lock);
+
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ config = data->config & ~CFG_CRMASK;
+ if (val < 130) {
+ convrate = 76;
+ config |= CFG_CR0076;
+ } else if (val < 590) {
+ convrate = 182;
+ config |= CFG_CR0182;
+ } else if (val < 1850) {
+ convrate = 1000;
+ config |= CFG_CR1000;
+ } else {
+ convrate = 2700;
+ config |= CFG_CR2700;
+ }
+ data->interval = convrate;
+ data->config = config;
+ ret = i2c_smbus_write_byte_data(data->client,
+ LM95241_REG_RW_CONFIG, config);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static int lm95241_write_temp(struct device *dev, u32 attr, int channel,
+ long val)
+{
+ struct lm95241_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int ret;
+
+ mutex_lock(&data->update_lock);
+
+ switch (attr) {
+ case hwmon_temp_min:
+ if (channel == 1) {
+ if (val < 0)
+ data->config |= R1DF_MASK;
+ else
+ data->config &= ~R1DF_MASK;
+ } else {
+ if (val < 0)
+ data->config |= R2DF_MASK;
+ else
+ data->config &= ~R2DF_MASK;
+ }
+ data->valid = 0;
+ ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
+ data->config);
+ break;
+ case hwmon_temp_max:
+ if (channel == 1) {
+ if (val <= 127875)
+ data->config |= R1DF_MASK;
+ else
+ data->config &= ~R1DF_MASK;
+ } else {
+ if (val <= 127875)
+ data->config |= R2DF_MASK;
+ else
+ data->config &= ~R2DF_MASK;
+ }
+ data->valid = 0;
+ ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
+ data->config);
+ break;
+ case hwmon_temp_type:
+ if (val != 1 && val != 2) {
+ ret = -EINVAL;
+ break;
+ }
+ if (channel == 1) {
+ data->trutherm &= ~(TT_MASK << TT1_SHIFT);
+ if (val == 1) {
+ data->model |= R1MS_MASK;
+ data->trutherm |= (TT_ON << TT1_SHIFT);
+ } else {
+ data->model &= ~R1MS_MASK;
+ data->trutherm |= (TT_OFF << TT1_SHIFT);
+ }
+ } else {
+ data->trutherm &= ~(TT_MASK << TT2_SHIFT);
+ if (val == 1) {
+ data->model |= R2MS_MASK;
+ data->trutherm |= (TT_ON << TT2_SHIFT);
+ } else {
+ data->model &= ~R2MS_MASK;
+ data->trutherm |= (TT_OFF << TT2_SHIFT);
+ }
+ }
+ ret = i2c_smbus_write_byte_data(client,
+ LM95241_REG_RW_REMOTE_MODEL,
+ data->model);
+ if (ret < 0)
+ break;
+ ret = i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
+ data->trutherm);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+static int lm95241_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ switch (type) {
+ case hwmon_chip:
+ return lm95241_write_chip(dev, attr, channel, val);
+ case hwmon_temp:
+ return lm95241_write_temp(dev, attr, channel, val);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static umode_t lm95241_is_visible(const void *data,
+ enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (type) {
+ case hwmon_chip:
+ switch (attr) {
+ case hwmon_chip_update_interval:
+ return S_IRUGO | S_IWUSR;
+ }
+ break;
+ case hwmon_temp:
+ switch (attr) {
+ case hwmon_temp_input:
+ return S_IRUGO;
+ case hwmon_temp_fault:
+ return S_IRUGO;
+ case hwmon_temp_min:
+ case hwmon_temp_max:
+ case hwmon_temp_type:
+ return S_IRUGO | S_IWUSR;
+ }
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm95241_detect(struct i2c_client *new_client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = new_client->adapter;
+ const char *name;
+ int mfg_id, chip_id;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ mfg_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID);
+ if (mfg_id != NATSEMI_MAN_ID)
+ return -ENODEV;
+
+ chip_id = i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID);
+ switch (chip_id) {
+ case LM95231_CHIP_ID:
+ name = "lm95231";
+ break;
+ case LM95241_CHIP_ID:
+ name = "lm95241";
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ /* Fill the i2c board info */
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+ return 0;
+}
+
+static void lm95241_init_client(struct i2c_client *client,
+ struct lm95241_data *data)
+{
+ data->interval = 1000;
+ data->config = CFG_CR1000;
+ data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT);
+
+ i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
+ i2c_smbus_write_byte_data(client, LM95241_REG_RW_REM_FILTER,
+ R1FE_MASK | R2FE_MASK);
+ i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
+ data->trutherm);
+ i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL,
+ data->model);
+}
+
+static const u32 lm95241_chip_config[] = {
+ HWMON_C_UPDATE_INTERVAL,
+ 0
+};
+
+static const struct hwmon_channel_info lm95241_chip = {
+ .type = hwmon_chip,
+ .config = lm95241_chip_config,
+};
+
+static const u32 lm95241_temp_config[] = {
+ HWMON_T_INPUT,
+ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN | HWMON_T_TYPE |
+ HWMON_T_FAULT,
+ HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN | HWMON_T_TYPE |
+ HWMON_T_FAULT,
+ 0
+};
+
+static const struct hwmon_channel_info lm95241_temp = {
+ .type = hwmon_temp,
+ .config = lm95241_temp_config,
+};
+
+static const struct hwmon_channel_info *lm95241_info[] = {
+ &lm95241_chip,
+ &lm95241_temp,
+ NULL
+};
+
+static const struct hwmon_ops lm95241_hwmon_ops = {
+ .is_visible = lm95241_is_visible,
+ .read = lm95241_read,
+ .write = lm95241_write,
+};
+
+static const struct hwmon_chip_info lm95241_chip_info = {
+ .ops = &lm95241_hwmon_ops,
+ .info = lm95241_info,
+};
+
+static int lm95241_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct lm95241_data *data;
+ struct device *hwmon_dev;
+
+ data = devm_kzalloc(dev, sizeof(struct lm95241_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ mutex_init(&data->update_lock);
+
+ /* Initialize the LM95241 chip */
+ lm95241_init_client(client, data);
+
+ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
+ data,
+ &lm95241_chip_info,
+ NULL);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
+}
+
+/* Driver data (common to all clients) */
+static const struct i2c_device_id lm95241_id[] = {
+ { "lm95231", 0 },
+ { "lm95241", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm95241_id);
+
+static struct i2c_driver lm95241_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = DEVNAME,
+ },
+ .probe = lm95241_probe,
+ .id_table = lm95241_id,
+ .detect = lm95241_detect,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(lm95241_driver);
+
+MODULE_AUTHOR("Davide Rizzo <elpa.rizzo@gmail.com>");
+MODULE_DESCRIPTION("LM95231/LM95241 sensor driver");
+MODULE_LICENSE("GPL");