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| author | Dirk Eibach <dirk.eibach@gdsys.cc> | 2014-10-29 15:56:44 +0100 |
|---|---|---|
| committer | Heiko Schocher <hs@denx.de> | 2014-11-10 06:44:30 +0100 |
| commit | b97cd6814ec08be56225975a050ee486bfa7c13a (patch) | |
| tree | d62bf2d70db726db65020427cbcb793c5bd2f5aa /arch | |
| parent | 7e78f7ad7f7f666598bc2ff115ea7a35f8e059f1 (diff) | |
| download | talos-obmc-uboot-b97cd6814ec08be56225975a050ee486bfa7c13a.tar.gz talos-obmc-uboot-b97cd6814ec08be56225975a050ee486bfa7c13a.zip | |
ppc4xx: Handle i2c stuck on combined xfer
ppc4xx i2c master gets stuck on errors while repeated start is
active. Can be easily reproduced by "i2c md" on an unpopulated
i2c address. There is not stop condition given, scl remains
pulled low.
The only way out seems to be doing a stop manually and then a
soft reset.
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/ppc4xx-i2c.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ppc4xx-i2c.h b/arch/powerpc/include/asm/ppc4xx-i2c.h index 09189cf19b..df97f175b3 100644 --- a/arch/powerpc/include/asm/ppc4xx-i2c.h +++ b/arch/powerpc/include/asm/ppc4xx-i2c.h @@ -72,6 +72,8 @@ struct ppc4xx_i2c { #define IIC_EXTSTS_XFRA 0x01 #define IIC_EXTSTS_ICT 0x02 #define IIC_EXTSTS_LA 0x04 +#define IIC_EXTSTS_BCS_MASK 0x70 +#define IIC_EXTSTS_BCS_FREE 0x40 /* XTCNTLSS Register Bit definition */ #define IIC_XTCNTLSS_SRST 0x01 |
