spi: Add spi_is_bpw_supported() Lets client drivers check and potentially handle issues.
Unified · Split
| @@ -1005,6 +1005,26 @@ spi_max_transfer_size(struct spi_device *spi) · 1004 unmodified lines | ||
| 1005 | 1005 | return min(tr_max, msg_max); |
| 1006 | 1006 | } |
| 1007 | 1007 | |
| 1008 | +/** | |
| 1009 | + * spi_is_bpw_supported - Check if bits per word is supported | |
| 1010 | + * @spi: SPI device | |
| 1011 | + * @bpw: Bits per word | |
| 1012 | + * | |
| 1013 | + * This function checks to see if the SPI controller supports @bpw. | |
| 1014 | + * | |
| 1015 | + * Returns: | |
| 1016 | + * True if @bpw is supported, false otherwise. | |
| 1017 | + */ | |
| 1018 | +static inline bool spi_is_bpw_supported(struct spi_device *spi, u32 bpw) | |
| 1019 | +{ | |
| 1020 | + u32 bpw_mask = spi->master->bits_per_word_mask; | |
| 1021 | + | |
| 1022 | + if (bpw == 8 || (bpw <= 32 && bpw_mask & SPI_BPW_MASK(bpw))) | |
| 1023 | + return true; | |
| 1024 | + | |
| 1025 | + return false; | |
| 1026 | +} | |
| 1027 | + | |
| 1008 | 1028 | /*---------------------------------------------------------------------------*/ |
| 1009 | 1029 | |
| 1010 | 1030 | /* SPI transfer replacement methods which make use of spi_res */ |