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smbus: allow returning an error from reads 

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-03-31 18:26:29 +02:00 committed by Michael S. Tsirkin
parent aa93200b88
commit 285364e968
2 changed files with 6 additions and 6 deletions
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6
hw/i2c/smbus.c
View File

@ -214,7 +214,7 @@ void smbus_quick_command(I2CBus *bus, uint8_t addr, int read)
i2c_end_transfer(bus);
}
uint8_t smbus_receive_byte(I2CBus *bus, uint8_t addr)
int smbus_receive_byte(I2CBus *bus, uint8_t addr)
{
uint8_t data;
@ -232,7 +232,7 @@ void smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data)
i2c_end_transfer(bus);
}
uint8_t smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command)
int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command)
{
uint8_t data;
i2c_start_transfer(bus, addr, 0);
@ -252,7 +252,7 @@ void smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data)
i2c_end_transfer(bus);
}
uint16_t smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command)
int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command)
{
uint16_t data;
i2c_start_transfer(bus, addr, 0);

6
include/hw/i2c/smbus.h
View File

@ -67,11 +67,11 @@ struct SMBusDevice {
/* Master device commands. */
void smbus_quick_command(I2CBus *bus, uint8_t addr, int read);
uint8_t smbus_receive_byte(I2CBus *bus, uint8_t addr);
int smbus_receive_byte(I2CBus *bus, uint8_t addr);
void smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data);
uint8_t smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
void smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data);
uint16_t smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
void smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data);
int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data);
void smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,