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| author | Marek Vasut <marex@denx.de> | 2014-10-22 21:56:02 +0200 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> | 2014-10-27 22:37:03 +0530 |
| commit | bc76b821f05fa4cdfca406cba975657de7a8e9f8 (patch) | |
| tree | 3c8b9720f7be4e40e23ae9e89dad16d21c326c6e | |
| parent | 80d73338080c83e17fbf3f844052ec71d03ecd13 (diff) | |
| download | u-boot-imx-bc76b821f05fa4cdfca406cba975657de7a8e9f8.zip u-boot-imx-bc76b821f05fa4cdfca406cba975657de7a8e9f8.tar.gz u-boot-imx-bc76b821f05fa4cdfca406cba975657de7a8e9f8.tar.bz2 | |
spi: altera: Clean up the use of variable d
The variable d is used in rather questionable way. Rework the code
a bit so it's clearer what it does. Also, rename the variable from
d to data to make it's name less mysterious. Finally, change it's
data type to uint32_t , since it's accessed as a 32bit number.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Pavel Machek <pavel@denx.de>
Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
Acked-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| -rw-r--r-- | drivers/spi/altera_spi.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/spi/altera_spi.c b/drivers/spi/altera_spi.c index 8e898b9..c08969d 100644 --- a/drivers/spi/altera_spi.c +++ b/drivers/spi/altera_spi.c @@ -126,10 +126,10 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, { struct altera_spi_slave *altspi = to_altera_spi_slave(slave); /* assume spi core configured to do 8 bit transfers */ - uint bytes = bitlen / 8; - const uchar *txp = dout; - uchar *rxp = din; - uint32_t reg, start; + unsigned int bytes = bitlen / 8; + const unsigned char *txp = dout; + unsigned char *rxp = din; + uint32_t reg, data, start; debug("%s: bus:%i cs:%i bitlen:%i bytes:%i flags:%lx\n", __func__, slave->bus, slave->cs, bitlen, bytes, flags); @@ -150,10 +150,13 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, spi_cs_activate(slave); while (bytes--) { - uchar d = txp ? *txp++ : CONFIG_ALTERA_SPI_IDLE_VAL; + if (txp) + data = *txp++; + else + data = CONFIG_ALTERA_SPI_IDLE_VAL; - debug("%s: tx:%x ", __func__, d); - writel(d, &altspi->regs->txdata); + debug("%s: tx:%x ", __func__, data); + writel(data, &altspi->regs->txdata); start = get_timer(0); while (1) { @@ -166,11 +169,11 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, } } - d = readl(&altspi->regs->rxdata); + data = readl(&altspi->regs->rxdata); if (rxp) - *rxp++ = d; + *rxp++ = data & 0xff; - debug("rx:%x\n", d); + debug("rx:%x\n", data); } done: |