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authorMichal Suchanek <hramrach@gmail.com>2015-12-02 13:38:21 +0300
committerMark Brown <broonie@kernel.org>2016-01-05 19:33:54 +0300
commitb541eef125fa3ae0df84572459af4e7084cb6343 (patch)
treeb085c9d4299ec0cd7f16a8078ec7dbc27cc46086 /drivers/spi
parent4acad4aae10d1fa79a075b38b5c73772c44f576c (diff)
downloadlinux-b541eef125fa3ae0df84572459af4e7084cb6343.tar.xz
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 <hkallweit1@gmail.com> CC: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-fsl-espi.c6
1 files changed, 6 insertions, 0 deletions
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);