i2c-designware: Enable RX_FULL interrupt
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>
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@ -342,7 +342,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
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u32 addr = msgs[dev->msg_write_idx].addr;
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u32 buf_len = dev->tx_buf_len;
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intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT;
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intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT | DW_IC_INTR_RX_FULL;
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if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) {
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/* Disable the adapter */
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@ -593,10 +593,11 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id)
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dev->status = STATUS_IDLE;
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}
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if (stat & DW_IC_INTR_TX_EMPTY) {
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if (stat & DW_IC_INTR_RX_FULL)
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i2c_dw_read(dev);
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if (stat & DW_IC_INTR_TX_EMPTY)
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i2c_dw_xfer_msg(dev);
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}
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/*
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* No need to modify or disable the interrupt mask here.
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