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i2c-designware: Enable RX_FULL interrupt

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Enable RX_FULL interrupt mask by default, and hook it in the interrupt
handler.  If requested amount of rx data (defined by IC_RX_TL) is not
available, we don't have to process i2c_dw_read().

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Shinya Kuribayashi 2009-11-06 21:48:33 +09:00 committed by Ben Dooks
parent 4cb6d1d6da
commit 21a89d4101
1 changed files with 4 additions and 3 deletions
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7
drivers/i2c/busses/i2c-designware.c
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@ -342,7 +342,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
u32 addr = msgs[dev->msg_write_idx].addr;
u32 buf_len = dev->tx_buf_len;
intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT;
intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT | DW_IC_INTR_RX_FULL;
if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) {
/* Disable the adapter */
@ -593,10 +593,11 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
dev->status = STATUS_IDLE;
}
if (stat & DW_IC_INTR_TX_EMPTY) {
if (stat & DW_IC_INTR_RX_FULL)
i2c_dw_read(dev);
if (stat & DW_IC_INTR_TX_EMPTY)
i2c_dw_xfer_msg(dev);
}
/*
* No need to modify or disable the interrupt mask here.