linux.git/drivers/spi, branch v2.6.24

spi: omap2_mcspi PIO RX fix

2008-01-24T22:06:44+00:00

Before transmission of the last word in PIO RX_ONLY mode rx+tx mode
is enabled:

	/* prevent last RX_ONLY read from triggering
	 * more word i/o: switch to rx+tx
	 */
	if (c == 0 && tx == NULL)
		mcspi_write_cs_reg(spi,
				OMAP2_MCSPI_CHCONF0, l);

But because c is decremented after the test, c will never be zero and
rx+tx will not be enabled. This breaks RX_ONLY mode PIO transfers.

Fix it by decrementing c in the beginning of the various I/O loops.

Signed-off-by: Kalle Valo 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

spi_bitbang: always grab lock with irqs blocked

2008-01-09T00:10:35+00:00

Fix a glitch reported by lockdep in the spi_bitbang code: it needs to
consistently block IRQs when holding that spinlock.

Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_spi: reload RCR before TCR

2007-12-11T03:43:55+00:00

We have a wifi module connected to the spi bus and got sometimes FIFO
overrun errors on the spi bus.

After some investigation i found that the driver loads the TCR (transmit
count) register before the RCR (receive count).  When the transfer list is
not empty the atmel_spi_next_message is called while tx and rx are enabled.
 As soon as the TCR is loaded, hardware starts transfer and causes a rx
fifo overrun because the RCR is not loaded yet.

Load the RCR before the TCR.  After this patch the fifo overrun disapears
at out setup.

Signed-off-by: Haavard Skinnemoen 
Signed-off-by: Rini van Zetten 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

spi_imx: fix typo in description

2007-12-11T03:43:55+00:00

Signed-off-by: Will Newton 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

spi_bfin5xx: fix typo in description

2007-12-11T03:43:55+00:00

Signed-off-by: Will Newton 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pxa2xx_spi: fix typo in description

2007-12-11T03:43:54+00:00

Signed-off-by: Will Newton 
Signed-off-by: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Blackfin SPI driver: reconfigure speed_hz and bits_per_word in each spi transfer

2007-12-05T17:21:20+00:00

 - reconfigure SPI baud from speed_hz of each spi transfer
 - according to spi_transfer.bits_per_word to reprogram register and setup
   correct SPI operation handlers

Signed-off-by: Bryan Wu 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Blackfin SPI driver: move hard coded pin_req to board file

2007-12-05T17:21:20+00:00

Remove some sort of bloaty code, try to get these pin_req arrays built at compile-time

 - move this static things to the blackfin board file
 - add pin_req array to struct bfin5xx_spi_master
 - tested on BF537/BF548 with SPI flash

Signed-off-by: Bryan Wu 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Blackfin SPI driver: use void __iomem * for regs_base

2007-12-05T17:21:20+00:00

Signed-off-by: Bryan Wu 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Blackfin SPI driver: use cpu_relax() to replace continue in while busywait

2007-12-05T17:21:20+00:00

Signed-off-by: Bryan Wu 
Cc: David Brownell 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds