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Commit c41704f5 authored by Sonic Zhang's avatar Sonic Zhang Committed by Bob Liu
Browse files

blackfin: bf60x: twi: work around temporary anomaly 0501001 



Disable IRQ when reading MMR rcv_data8 and rcv_data16.

Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
parent 1e92bf6d

arch/blackfin/include/asm/bfin_twi.h

+27 −0
Original line number Diff line number Diff line
@@ -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);  )				*/