Commit Graph

5 Commits

Author SHA1 Message Date
Wolfram Sang
937041e216 spi/mpc52xx-spi: minor cleanups
- drop own, obsolete include-file
- drop IRQF_SAMPLE_RANDOM (deprecated feature)
- drop 'if' above kfree()
- typos, braces & whitespaces

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Luotao Fu <l.fu@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-12-08 18:48:15 -07:00
Luotao Fu
b8d4e2ce60 mpc52xx_spi: add gpio chipselect
This one enables the mpc52xx_spi driver for usage of user defined gpio lines
as chipselect. This way we can control some more spi devices than only one

V2 Changes:
* preinitialize the gpio as output in probe function and call gpio_set_value in
  the chip select function instead of calling direction_output every time.
* initialize the gpio line with output high, since we don't support CS_HIGH
  in the driver currently any way. change gpio value setting to default active
  low in chip select call.
* free the gpio array while error or removing.

Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-12-08 18:48:13 -07:00
Luotao Fu
d65aea99bd mpc52xx_spi: add missing mode_bits definition
V2 changes:
* remove CS_HIGH mode

Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-12-08 18:48:13 -07:00
Luotao Fu
4a495b1c43 mpc52xx_spi: fix clearing status register
Before reading status register to check MODF failure, we have to clear it
first since the MODF flag will be set after initializing the spi master,
if the hardware comes up with a low SS. The processor datasheet reads:
Mode Fault flag -- bit sets if SS input goes low while SPI is configured as a
master. Flag is cleared automatically by an SPI status register read (with MODF
set) followed by a SPI control register 1 write.
Hence simply rereading the register is not sufficient to clear the flag. We
redo the write also to make sure to clear the flag.

V2 Changes:
* change variable type from int to u8

Signed-off-by: Luotao Fu <l.fu@pengutronix.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-12-08 18:48:13 -07:00
Grant Likely
42bbb70980 powerpc/5200: Add mpc5200-spi (non-PSC) device driver
Adds support for the dedicated SPI device on the Freescale MPC5200(b)
SoC.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2009-11-04 15:34:18 -07:00