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>
diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c
index 0eea0dd..940bbf3 100644
--- a/drivers/i2c/busses/i2c-designware.c
+++ b/drivers/i2c/busses/i2c-designware.c
@@ -342,7 +342,7 @@
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 @@
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.