.alert() is meant to be generic, but there is currently no way for the device driver to know which protocol generated the alert. Add a parameter in .alert() to help the device driver to understand what is given in data. This patch is required to have the support of SMBus Host Notify protocol through .alert().
Unified · Split
| @@ -568,12 +568,16 @@ static void retry_timeout(unsigned long data) · 567 unmodified lines | ||
| 568 | 568 | } |
| 569 | 569 | |
| 570 | 570 | |
| 571 | −static void ssif_alert(struct i2c_client *client, unsigned int data) | |
| 571 | +static void ssif_alert(struct i2c_client *client, enum i2c_alert_protocol type, | |
| 572 | + unsigned int data) | |
| 572 | 573 | { |
| 573 | 574 | struct ssif_info *ssif_info = i2c_get_clientdata(client); |
| 574 | 575 | unsigned long oflags, *flags; |
| 575 | 576 | bool do_get = false; |
| 576 | 577 | |
| 578 | + if (type != I2C_PROTOCOL_SMBUS_ALERT) | |
| 579 | + return; | |
| 580 | + | |
| 577 | 581 | ssif_inc_stat(ssif_info, alerts); |
| 578 | 582 | |
| 579 | 583 | flags = ipmi_ssif_lock_cond(ssif_info, &oflags); |
| @@ -1624,10 +1624,14 @@ static int lm90_remove(struct i2c_client *client) · 1623 unmodified lines | ||
| 1624 | 1624 | return 0; |
| 1625 | 1625 | } |
| 1626 | 1626 | |
| 1627 | −static void lm90_alert(struct i2c_client *client, unsigned int flag) | |
| 1627 | +static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type, | |
| 1628 | + unsigned int flag) | |
| 1628 | 1629 | { |
| 1629 | 1630 | u16 alarms; |
| 1630 | 1631 | |
| 1632 | + if (type != I2C_PROTOCOL_SMBUS_ALERT) | |
| 1633 | + return; | |
| 1634 | + | |
| 1631 | 1635 | if (lm90_is_tripped(client, &alarms)) { |
| 1632 | 1636 | /* |
| 1633 | 1637 | * Disable ALERT# output, because these chips don't implement |
| @@ -56,7 +56,8 @@ static int smbus_do_alert(struct device *dev, void *addrp) · 55 unmodified lines | ||
| 56 | 56 | if (client->dev.driver) { |
| 57 | 57 | driver = to_i2c_driver(client->dev.driver); |
| 58 | 58 | if (driver->alert) |
| 59 | − driver->alert(client, data->flag); | |
| 59 | + driver->alert(client, I2C_PROTOCOL_SMBUS_ALERT, | |
| 60 | + data->flag); | |
| 60 | 61 | else |
| 61 | 62 | dev_warn(&client->dev, "no driver alert()!\n"); |
| 62 | 63 | } else |
| @@ -126,6 +126,10 @@ i2c_smbus_read_i2c_block_data_or_emulated(const struct i2c_client *client, · 125 unmodified lines | ||
| 126 | 126 | u8 command, u8 length, u8 *values); |
| 127 | 127 | #endif /* I2C */ |
| 128 | 128 | |
| 129 | +enum i2c_alert_protocol { | |
| 130 | + I2C_PROTOCOL_SMBUS_ALERT, | |
| 131 | +}; | |
| 132 | + | |
| 129 | 133 | /** |
| 130 | 134 | * struct i2c_driver - represent an I2C device driver |
| 131 | 135 | * @class: What kind of i2c device we instantiate (for detect) |
| @@ -181,7 +185,8 @@ struct i2c_driver { · 49 unmodified lines | ||
| 181 | 185 | * For the SMBus alert protocol, there is a single bit of data passed |
| 182 | 186 | * as the alert response's low bit ("event flag"). |
| 183 | 187 | */ |
| 184 | − void (*alert)(struct i2c_client *, unsigned int data); | |
| 188 | + void (*alert)(struct i2c_client *, enum i2c_alert_protocol protocol, | |
| 189 | + unsigned int data); | |
| 185 | 190 | |
| 186 | 191 | /* a ioctl like command that can be used to perform specific functions |
| 187 | 192 | * with the device. |