Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2ed355165ff4ec834a75770f2a15dc87f5e06088
Commit: 2ed355165ff4ec834a75770f2a15dc87f5e06088
Parent: fad91c890909aabab0d9858d50f3c8394ee16b21
Author: Mike Frysinger <[EMAIL PROTECTED]>
AuthorDate: Tue Dec 4 23:45:14 2007 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Dec 5 09:21:19 2007 -0800
spi: spi_bfin, don't bypass spi framework
Prevent people from setting bits in ctl_reg that the SPI framework already
handles, hopefully we can one day drop ctl_reg completely
Signed-off-by: Mike Frysinger <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
drivers/spi/spi_bfin5xx.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index c2d51cf..8e4ea89 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -998,6 +998,18 @@ static int setup(struct spi_device *spi)
/* chip_info isn't always needed */
if (chip_info) {
+ /* Make sure people stop trying to set fields via ctl_reg
+ * when they should actually be using common SPI framework.
+ * Currently we let through: WOM EMISO PSSE GM SZ TIMOD.
+ * Not sure if a user actually needs/uses any of these,
+ * but let's assume (for now) they do.
+ */
+ if (chip_info->ctl_reg & (SPE|MSTR|CPOL|CPHA|LSBF|SIZE)) {
+ dev_err(&spi->dev, "do not set bits in ctl_reg "
+ "that the SPI framework manages\n");
+ return -EINVAL;
+ }
+
chip->enable_dma = chip_info->enable_dma != 0
&& drv_data->master_info->enable_dma;
chip->ctl_reg = chip_info->ctl_reg;
-
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