diff options
| author |   Sonic Zhang <sonic.zhang@analog.com> | 2012-05-15 16:20:33 +0800 |
|---|---|---|
| committer |   Bob Liu <lliubbo@gmail.com> | 2012-05-21 14:55:03 +0800 |
| commit | c41704f509d1649f7ba0815c8d47c9563ff9b107 (patch) | |
| tree | 38bfd638944b53e31567e2cf9dc9d8979d8fb3a2 /arch/blackfin | |
| parent | blackfin: twi: Move TWI MMR access macro to twi head file (diff) | |
| download | linux-dev-c41704f509d1649f7ba0815c8d47c9563ff9b107.tar.xz linux-dev-c41704f509d1649f7ba0815c8d47c9563ff9b107.zip | |
blackfin: bf60x: twi: work around temporary anomaly 0501001
Disable IRQ when reading MMR rcv_data8 and rcv_data16.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/include/asm/bfin_twi.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin_twi.h b/arch/blackfin/include/asm/bfin_twi.h index 72092108df1c..87e6007b8f4a 100644 --- a/arch/blackfin/include/asm/bfin_twi.h +++ b/arch/blackfin/include/asm/bfin_twi.h @@ -83,8 +83,35 @@ DEFINE_TWI_REG(FIFO_CTL, fifo_ctl) DEFINE_TWI_REG(FIFO_STAT, fifo_stat) DEFINE_TWI_REG(XMT_DATA8, xmt_data8) DEFINE_TWI_REG(XMT_DATA16, xmt_data16) +#if !ANOMALY_05001001 DEFINE_TWI_REG(RCV_DATA8, rcv_data8) DEFINE_TWI_REG(RCV_DATA16, rcv_data16) +#else +static inline u16 read_RCV_DATA8(struct bfin_twi_iface *iface) +{ + u16 ret; + unsigned long flags; + + flags = hard_local_irq_save(); + ret = iface->regs_base->rcv_data8; + hard_local_irq_restore(flags); + + return ret; +} + +static inline u16 read_RCV_DATA16(struct bfin_twi_iface *iface) +{ + u16 ret; + unsigned long flags; + + flags = hard_local_irq_save(); + ret = iface->regs_base->rcv_data16; + hard_local_irq_restore(flags); + + return ret; +} +#endif + /* ******************** TWO-WIRE INTERFACE (TWI) MASKS ***********************/ /* TWI_CLKDIV Macros (Use: *pTWI_CLKDIV = CLKLOW(x)|CLKHI(y); ) */ |