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spi/fsl-espi: Correct the maximum transaction length 

The maximum length during one transcation is 64KiB.

Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hou Zhiqiang 2016-01-22 18:58:26 +08:00 committed by Mark Brown
parent cabeea9808
commit 5cfa1e4e0d
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-fsl-espi.c
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@ -84,7 +84,7 @@ struct fsl_espi_transfer {
/* SPCOM register values */
#define SPCOM_CS(x) ((x) << 30)
#define SPCOM_TRANLEN(x) ((x) << 0)
#define SPCOM_TRANLEN_MAX 0xFFFF /* Max transaction length */
#define SPCOM_TRANLEN_MAX 0x10000 /* Max transaction length */
#define AUTOSUSPEND_TIMEOUT 2000
@ -233,7 +233,7 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
reinit_completion(&mpc8xxx_spi->done);
/* Set SPCOM[CS] and SPCOM[TRANLEN] field */
if ((t->len - 1) > SPCOM_TRANLEN_MAX) {
if (t->len > SPCOM_TRANLEN_MAX) {
dev_err(mpc8xxx_spi->dev, "Transaction length (%d)"
" beyond the SPCOM[TRANLEN] field\n", t->len);
return -EINVAL;