From: Stefan Moring Date: Wed, 28 Jun 2023 12:54:06 +0000 (+0200) Subject: spi: Increase imx51 ecspi burst length based on transfer length X-Git-Tag: v6.6.7~2084^2~71 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=15a6af94a2779d5dfb42ee4bfac858ea8e964a3f;p=platform%2Fkernel%2Flinux-starfive.git 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 Link: https://lore.kernel.org/r/20230628125406.237949-1-stefan.moring@technolution.nl Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 528ae46..169d158 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