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Commit 21a89d41 authored by Shinya Kuribayashi's avatar Shinya Kuribayashi Committed by Ben Dooks
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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: default avatarShinya Kuribayashi <shinya.kuribayashi@necel.com>
Acked-by: default avatarBaruch Siach <baruch@tkos.co.il>
Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 4cb6d1d6

drivers/i2c/busses/i2c-designware.c

+4 −3
Original line number Diff line number Diff line
@@ -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.