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spi: fsl-espi: expose maximum transfer size limit

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The fsl-espi hardware can trasfer at most 64K data so report teh
limitation.

Based on patch by Heiner Kallweit <[email protected]>

CC: Heiner Kallweit <[email protected]>
Signed-off-by: Michal Suchanek <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Michal Suchanek 2015-12-02 10:38:21 +00:00 • committed by Mark Brown
commit b541eef125
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-fsl-espi.c
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@ -643,6 +643,11 @@ static int fsl_espi_runtime_resume(struct device *dev)
}
#endif
static size_t fsl_espi_max_transfer_size(struct spi_device *spi)
{
return SPCOM_TRANLEN_MAX;
}
static struct spi_master * fsl_espi_probe(struct device *dev,
struct resource *mem, unsigned int irq)
{
@ -670,6 +675,7 @@ static struct spi_master * fsl_espi_probe(struct device *dev,
master->cleanup = fsl_espi_cleanup;
master->transfer_one_message = fsl_espi_do_one_msg;
master->auto_runtime_pm = true;
master->max_transfer_size = fsl_espi_max_transfer_size;
mpc8xxx_spi = spi_master_get_devdata(master);