From b541eef125fa3ae0df84572459af4e7084cb6343 Mon Sep 17 00:00:00 2001 From: Michal Suchanek Date: Wed, 2 Dec 2015 10:38:21 +0000 Subject: [PATCH] spi: fsl-espi: expose maximum transfer size limit The fsl-espi hardware can trasfer at most 64K data so report teh limitation. Based on patch by Heiner Kallweit CC: Heiner Kallweit Signed-off-by: Michal Suchanek Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-espi.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c index c27124a5ec8e..7fd6a4c009d2 100644 --- a/drivers/spi/spi-fsl-espi.c +++ b/drivers/spi/spi-fsl-espi.c @@ -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); -- 2.39.5