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smbus: allow returning an error from reads

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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); 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; uint8_t data;
@ -232,7 +232,7 @@ void smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data)
i2c_end_transfer(bus); 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; uint8_t data;
i2c_start_transfer(bus, addr, 0); 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); 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; uint16_t data;
i2c_start_transfer(bus, addr, 0); i2c_start_transfer(bus, addr, 0);

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

@ -67,11 +67,11 @@ struct SMBusDevice {
/* Master device commands. */ /* Master device commands. */
void smbus_quick_command(I2CBus *bus, uint8_t addr, int read); 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); 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); 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); 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); 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, void smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,