diff options
| author | Stefan Moring <[email protected]> | 2023-06-28 12:54:06 +0000 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2023-07-09 21:51:34 +0000 |
| commit | 15a6af94a2779d5dfb42ee4bfac858ea8e964a3f (patch) | |
| tree | dd987e67a77cc2ac57c7ef46ac972756b2f07c2a /drivers/spi/spi-imx.c | |
| parent | spi: stm32: disable device mode with st,stm32f4-spi compatible (diff) | |
| download | kernel-15a6af94a2779d5dfb42ee4bfac858ea8e964a3f.tar.gz kernel-15a6af94a2779d5dfb42ee4bfac858ea8e964a3f.zip | |
spi: Increase imx51 ecspi burst length based on transfer length
IMX51 supports 4096 bit burst lengths. Using the spi transfer length
instead of bits_per_word increases performance significantly.
Signed-off-by: Stefan Moring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'drivers/spi/spi-imx.c')
| -rw-r--r-- | drivers/spi/spi-imx.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 528ae46c087f..169d158b6f00 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -659,9 +659,13 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx, if (spi_imx->slave_mode && is_imx53_ecspi(spi_imx)) ctrl |= (spi_imx->slave_burst * 8 - 1) << MX51_ECSPI_CTRL_BL_OFFSET; - else - ctrl |= (spi_imx->bits_per_word - 1) - << MX51_ECSPI_CTRL_BL_OFFSET; + else { + if (spi_imx->count >= 512) + ctrl |= 0xFFF << MX51_ECSPI_CTRL_BL_OFFSET; + else + ctrl |= (spi_imx->count*8 - 1) + << MX51_ECSPI_CTRL_BL_OFFSET; + } /* set clock speed */ ctrl &= ~(0xf << MX51_ECSPI_CTRL_POSTDIV_OFFSET | @@ -1258,6 +1262,7 @@ static int spi_imx_setupxfer(struct spi_device *spi, spi_imx->spi_bus_clk = t->speed_hz; spi_imx->bits_per_word = t->bits_per_word; + spi_imx->count = t->len; /* * Initialize the functions for transfer. To transfer non byte-aligned |