From 21a89d4101ce338c2872401c82b66a7c155e24ab Mon Sep 17 00:00:00 2001
From: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Date: Fri, 6 Nov 2009 21:48:33 +0900
Subject: [PATCH] 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>
---
drivers/i2c/busses/i2c-designware.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c
index 0eea0dd35895..940bbf31bc8c 100644
--- a/drivers/i2c/busses/i2c-designware.c
+++ b/drivers/i2c/busses/i2c-designware.c
@@ -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.
--
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