Messages in this thread | | | From | Andy Shevchenko <> | Date | Mon, 10 Jul 2023 10:36:53 +0300 | Subject | Re: [PATCH v9 2/2] iio: adc: max14001: New driver |
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On Mon, Jul 10, 2023 at 7:27 AM Kim Seer Paller <kimseer.paller@analog.com> wrote: > > The MAX14001 is configurable, isolated 10-bit ADCs for multi-range > binary inputs.
...
> V8 -> V9: Changed SPI buffer data types to __le16,
Why?
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> + __le16 spi_tx_buffer __aligned(IIO_DMA_MINALIGN); > + __le16 spi_rx_buffer;
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> + /* > + * Prepare SPI transmit buffer 16 bit-value to big-endian format and > + * reverses bit order to align with the LSB-first input on SDI port.
reverse
> + */ > + st->spi_tx_buffer = bitrev16(cpu_to_be16(FIELD_PREP(MAX14001_ADDR_MASK, > + reg_addr)));
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> + /* > + * Convert received 16-bit value from big-endian to little-endian format > + * and reverses bit order.
reverse
> + */ > + *data = bitrev16(be16_to_cpu(st->spi_rx_buffer));
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> + /* > + * Prepare SPI transmit buffer 16 bit-value to big-endian format and > + * reverses bit order to align with the LSB-first input on SDI port.
reverse
> + */ > + st->spi_tx_buffer = bitrev16(cpu_to_be16( > + FIELD_PREP(MAX14001_ADDR_MASK, reg_addr) | > + FIELD_PREP(MAX14001_SET_WRITE_BIT, 1) | > + FIELD_PREP(MAX14001_DATA_MASK, data)));
Obviously it's incorrect now even more than before. The types are defined as __le, while ops are against __be.
-- With Best Regards, Andy Shevchenko
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