diff options
| author | Trent Piepho <tpiepho@gmail.com> | 2013-12-14 06:27:44 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-12-17 01:03:42 +0400 |
| commit | 89c1f60746106755e29dcc3db9f22e37000891ef (patch) | |
| tree | 376230d90e6c40a0c0f8936bf87689e5e8316788 /include/linux/spi/spi.h | |
| parent | 0c64bc1b5eace5f48dec7305b83ee4d613d58c94 (diff) | |
| download | linux-89c1f60746106755e29dcc3db9f22e37000891ef.tar.xz | |
spi: Order fields in spi_device for better packing
Now that spi_device->mode is a u16, the chip_select, bits_per_mode,
and mode fields pack poorly, taking 8 bytes: four data and four
padding. By moving (u8)bits_per_word up one position, to after
(u8)chip_select, they pack better and only use 4 bytes.
Signed-off-by: Trent Piepho <tpiepho@gmail.com>
Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>g
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'include/linux/spi/spi.h')
| -rw-r--r-- | include/linux/spi/spi.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 8c62ba74dd91..27a882978c15 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -75,6 +75,7 @@ struct spi_device { struct spi_master *master; u32 max_speed_hz; u8 chip_select; + u8 bits_per_word; u16 mode; #define SPI_CPHA 0x01 /* clock phase */ #define SPI_CPOL 0x02 /* clock polarity */ @@ -92,7 +93,6 @@ struct spi_device { #define SPI_TX_QUAD 0x200 /* transmit with 4 wires */ #define SPI_RX_DUAL 0x400 /* receive with 2 wires */ #define SPI_RX_QUAD 0x800 /* receive with 4 wires */ - u8 bits_per_word; int irq; void *controller_state; void *controller_data; |