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- /** @file
- I2c Bus byte read/write functions.
- Copyright (c) 2008 - 2009, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #ifndef _CIRRUS_LOGIC_I2C_H_
- #define _CIRRUS_LOGIC_I2C_H_
- #include <Protocol/PciIo.h>
- /**
- Read one byte data on I2C Bus.
- Read one byte data from the slave device connectet to I2C Bus.
- If Data is NULL, then ASSERT().
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param DeviceAddress Slave device's address.
- @param RegisterAddress The register address on slave device.
- @param Data The pointer to returned data if EFI_SUCCESS returned.
- @retval EFI_DEVICE_ERROR
- @retval EFI_SUCCESS
- **/
- EFI_STATUS
- EFIAPI
- I2cReadByte (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 DeviceAddress,
- UINT8 RegisterAddress,
- UINT8 *Data
- );
- /**
- Write one byte data onto I2C Bus.
- Write one byte data to the slave device connectet to I2C Bus.
- If Data is NULL, then ASSERT().
- @param PciIo The pointer to PCI_IO_PROTOCOL.
- @param DeviceAddress Slave device's address.
- @param RegisterAddress The register address on slave device.
- @param Data The pointer to write data.
- @retval EFI_DEVICE_ERROR
- @retval EFI_SUCCESS
- **/
- EFI_STATUS
- EFIAPI
- I2cWriteByte (
- EFI_PCI_IO_PROTOCOL *PciIo,
- UINT8 DeviceAddress,
- UINT8 RegisterAddress,
- UINT8 *Data
- );
- #endif
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