Gregory Nutt
caea59b340
SPI bit order: Add configuration setting to indicate if an architecture-specif SPI implementation does or does not support LSB bit order.
2016-08-08 12:21:20 -06:00
Gregory Nutt
6df28bc74e
Make bit-order SPI H/W feature configurable for better error detection
2016-08-08 11:54:13 -06:00
Gregory Nutt
21859af6d9
Add check of return value in drivers affected by last change: Report the error on a failure to set the bit order.
2016-08-08 08:40:37 -06:00
Gregory Nutt
7d4cb73bd6
STM32 and EFM32 SPI drivers adopted an incompatible conventions somewhere along the line. The set the number of bits to negative when calling SPI_SETBITS which had the magical side-effect of setting LSB first order of bit transmission. This is not only a hokey way to pass control information but is supported by no other SPI drivers.
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This change three things: (1) It adds HWFEAT_LSBFIRST as a new H/W feature. (2) It changes the implementations of SPI_SETBITS in the STM32 and EFM32 derivers so that negated bit numbers are simply errors and it adds the SPI_HWFEATURES method that can set the LSB bit order, and (3) It changes all calls with negative number of bits from all drivers: The number of bits is now always positive and SPI_HWFEATUREs is called with HWFEAT_LSBFIRST to set the bit order.
2016-08-08 08:28:13 -06:00
Gregory Nutt
9965cbe428
drivers/: Review and correct some stylistic inconsistencies
2016-08-07 09:43:48 -06:00
Gregory Nutt
0c8c7fecf0
Add _ to the beginning of all debug macros to avoid name collisions
2016-06-16 12:33:32 -06:00
Gregory Nutt
f12da847d8
drivers/wireless: Change some *err() message to *info() messages if what was a *dbg() message does not indicate and error condition.
2016-06-11 19:03:57 -06:00
Gregory Nutt
a1469a3e95
Add CONFIG_DEBUG_ERROR. Change names of *dbg() * *err()
2016-06-11 15:50:49 -06:00
Gregory Nutt
564a1ce606
Cosmetic clean-up of comments
2016-01-24 08:21:55 -06:00
Gregory Nutt
7edf921c5e
Remove CONFIG_SPI_OWNBUS: Now it is not just a good idea, it is the law
2016-01-23 18:54:36 -06:00
Gregory Nutt
f6e49caba8
All SPI-based device drivers needs to call SPI_HWFEATURES() with zero in order to co-exist with drivers that use H/W features
2016-01-23 16:18:13 -06:00
Gregory Nutt
63301fe213
Cosmetic changes from review of last pull request
2016-01-17 14:52:11 -06:00
Janne Rosberg
fb1bf10a3d
add pn532 support
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Signed-off-by: Janne Rosberg <janne.rosberg@offcode.fi>
2016-01-17 22:17:49 +02:00
