1SPI_W8R8(9)             Serial Peripheral Interface (S             SPI_W8R8(9)
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NAME

6       spi_w8r8 - SPI synchronous 8 bit write followed by 8 bit read
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SYNOPSIS

9       ssize_t spi_w8r8(struct spi_device * spi, u8 cmd);
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ARGUMENTS

12       spi
13           device with which data will be exchanged
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15       cmd
16           command to be written before data is read back
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CONTEXT

19       can sleep
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DESCRIPTION

22       This returns the (unsigned) eight bit number returned by the device, or
23       else a negative error code. Callable only from contexts that can sleep.
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26Kernel Hackers Manual 2.6.         June 2019                       SPI_W8R8(9)
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