From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laxman Dewangan Subject: [PATCH] spi: make sure all transfer has bits_per_word set Date: Fri, 9 Nov 2012 14:36:45 +0530 Message-ID: <1352452005-13789-1-git-send-email-ldewangan@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, Laxman Dewangan , swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Stephen Warren To: , Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: spi-devel-general-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-spi.vger.kernel.org When spi client does the spi transfer and does not sets the bits_per_word for each transfer then set it as default of spi device in spi core before calling low level transfer. Removing the similar code from spi-tegra20-slink driver as it is not required. Signed-off-by: Laxman Dewangan Cc: Stephen Warren --- When reviewing the change [PATCH] spi: tegra: add spi driver for SLINK controller it was suggested by Mark and Stephen that we should move the bits_per_word setting to the core as it almost exist in all driver. Creating this patch for doing this. Creating teh patch drivers/spi/spi-tegra20-slink.c | 3 +-- drivers/spi/spi.c | 11 ++++++++++- 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c index b8985be..07dc735 100644 --- a/drivers/spi/spi-tegra20-slink.c +++ b/drivers/spi/spi-tegra20-slink.c @@ -727,8 +727,7 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi, unsigned long command; unsigned long command2; - bits_per_word = t->bits_per_word ? t->bits_per_word : - spi->bits_per_word; + bits_per_word = t->bits_per_word; speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz; if (!speed) speed = tspi->spi_max_frequency; diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index fc0da39..6891a03 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1193,6 +1193,7 @@ EXPORT_SYMBOL_GPL(spi_setup); static int __spi_async(struct spi_device *spi, struct spi_message *message) { struct spi_master *master = spi->master; + struct spi_transfer *xfer; /* Half-duplex links include original MicroWire, and ones with * only one data pin like SPI_3WIRE (switches direction) or where @@ -1201,7 +1202,6 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) */ if ((master->flags & SPI_MASTER_HALF_DUPLEX) || (spi->mode & SPI_3WIRE)) { - struct spi_transfer *xfer; unsigned flags = master->flags; list_for_each_entry(xfer, &message->transfers, transfer_list) { @@ -1214,6 +1214,15 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) } } + /** + * Set transfer bits_per_word as spi device default if it is not + * set for this transfer. + */ + list_for_each_entry(xfer, &message->transfers, transfer_list) { + if (!xfer->bits_per_word) + xfer->bits_per_word = spi->bits_per_word; + } + message->spi = spi; message->status = -EINPROGRESS; return master->transfer(spi, message); -- 1.7.1.1 ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov