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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2013-01-10 13:13:56 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-14 07:43:36 +0900 |
| commit | 7a5d8ca12aece480e0fe5eda8ce4236dddf55363 (patch) | |
| tree | c1e3dca8f659f842578a6a6618957aefe06576e0 /drivers/spi/spi-bitbang.c | |
| parent | 851bacf5902cad15f9bb789d278a1ee9608c8f25 (diff) | |
| download | linux-7a5d8ca12aece480e0fe5eda8ce4236dddf55363.tar.gz linux-7a5d8ca12aece480e0fe5eda8ce4236dddf55363.tar.bz2 linux-7a5d8ca12aece480e0fe5eda8ce4236dddf55363.zip | |
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.c | 27 |
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; |