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hw/i2c: Introduce i2c_start_recv() and i2c_start_send()

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To ease reviewing code using the I2C bus API, introduce the
i2c_start_recv() and i2c_start_send() helpers which don't
take the confusing 'is_recv' boolean argument.

Use these new helpers in the SMBus / AUX bus models.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-06-17 13:53:34 +02:00 • committed by Corey Minyard
parent 265caf45c6
commit 90603c5b89
5 changed files with 53 additions and 19 deletions
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24
include/hw/i2c/i2c.h
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@ -88,9 +88,33 @@ int i2c_bus_busy(I2CBus *bus);
* @address: address of the slave
* @is_recv: indicates the transfer direction
*
* When @is_recv is a known boolean constant, use the
* i2c_start_recv() or i2c_start_send() helper instead.
*
* Returns: 0 on success, -1 on error
*/
int i2c_start_transfer(I2CBus *bus, uint8_t address, bool is_recv);
/**
* i2c_start_recv: start a 'receive' transfer on an I2C bus.
*
* @bus: #I2CBus to be used
* @address: address of the slave
*
* Returns: 0 on success, -1 on error
*/
int i2c_start_recv(I2CBus *bus, uint8_t address);
/**
* i2c_start_send: start a 'send' transfer on an I2C bus.
*
* @bus: #I2CBus to be used
* @address: address of the slave
*
* Returns: 0 on success, -1 on error
*/
int i2c_start_send(I2CBus *bus, uint8_t address);
void i2c_end_transfer(I2CBus *bus);
void i2c_nack(I2CBus *bus);
int i2c_send(I2CBus *bus, uint8_t data);