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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2013-01-10 16:13:56 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-01-14 02:43:36 +0400
commit7a5d8ca12aece480e0fe5eda8ce4236dddf55363 (patch)
treec1e3dca8f659f842578a6a6618957aefe06576e0 /drivers/spi/spi-bitbang.c
parent851bacf5902cad15f9bb789d278a1ee9608c8f25 (diff)
downloadlinux-7a5d8ca12aece480e0fe5eda8ce4236dddf55363.tar.xz
spi: bitbang: simplify pointer arithmetics
Add a pointer variable to make spi_bitbang_start() look simpler. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/spi/spi-bitbang.c')
-rw-r--r--drivers/spi/spi-bitbang.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/spi/spi-bitbang.c b/drivers/spi/spi-bitbang.c
index 8b3d8efafd3c..328c4dcd3d52 100644
--- a/drivers/spi/spi-bitbang.c
+++ b/drivers/spi/spi-bitbang.c
@@ -427,40 +427,41 @@ EXPORT_SYMBOL_GPL(spi_bitbang_transfer);
*/
int spi_bitbang_start(struct spi_bitbang *bitbang)
{
- int status;
+ struct spi_master *master = bitbang->master;
+ int status;
- if (!bitbang->master || !bitbang->chipselect)
+ if (!master || !bitbang->chipselect)
return -EINVAL;
INIT_WORK(&bitbang->work, bitbang_work);
spin_lock_init(&bitbang->lock);
INIT_LIST_HEAD(&bitbang->queue);
- if (!bitbang->master->mode_bits)
- bitbang->master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
+ if (!master->mode_bits)
+ master->mode_bits = SPI_CPOL | SPI_CPHA | bitbang->flags;
- if (!bitbang->master->transfer)
- bitbang->master->transfer = spi_bitbang_transfer;
+ if (!master->transfer)
+ master->transfer = spi_bitbang_transfer;
if (!bitbang->txrx_bufs) {
bitbang->use_dma = 0;
bitbang->txrx_bufs = spi_bitbang_bufs;
- if (!bitbang->master->setup) {
+ if (!master->setup) {
if (!bitbang->setup_transfer)
bitbang->setup_transfer =
spi_bitbang_setup_transfer;
- bitbang->master->setup = spi_bitbang_setup;
- bitbang->master->cleanup = spi_bitbang_cleanup;
+ master->setup = spi_bitbang_setup;
+ master->cleanup = spi_bitbang_cleanup;
}
- } else if (!bitbang->master->setup)
+ } else if (!master->setup)
return -EINVAL;
- if (bitbang->master->transfer == spi_bitbang_transfer &&
+ if (master->transfer == spi_bitbang_transfer &&
!bitbang->setup_transfer)
return -EINVAL;
/* this task is the only thing to touch the SPI bits */
bitbang->busy = 0;
bitbang->workqueue = create_singlethread_workqueue(
- dev_name(bitbang->master->dev.parent));
+ dev_name(master->dev.parent));
if (bitbang->workqueue == NULL) {
status = -EBUSY;
goto err1;
@@ -469,7 +470,7 @@ int spi_bitbang_start(struct spi_bitbang *bitbang)
/* driver may get busy before register() returns, especially
* if someone registered boardinfo for devices
*/
- status = spi_register_master(bitbang->master);
+ status = spi_register_master(master);
if (status < 0)
goto err2;