From 552e450929a7298cc8834fd2824a60b2e914f70e Mon Sep 17 00:00:00 2001
From: Feng Tang <feng.tang@intel.com>
Date: Wed, 20 Jan 2010 13:49:45 -0700
Subject: spi/dw_spi: refine the IRQ mode working flow

Now dw_spi core fully supports 3 transfer modes: pure polling,
DMA and IRQ mode. IRQ mode will use the FIFO half empty as
the IRQ trigger, so each interface driver need set the fifo_len,
so that core driver can handle it properly

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---
 include/linux/spi/dw_spi.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/linux/spi')

diff --git a/include/linux/spi/dw_spi.h b/include/linux/spi/dw_spi.h
index 51b3e771a9a3..1a127a31e017 100644
--- a/include/linux/spi/dw_spi.h
+++ b/include/linux/spi/dw_spi.h
@@ -90,6 +90,7 @@ struct dw_spi {
 	unsigned long		paddr;
 	u32			iolen;
 	int			irq;
+	u32			fifo_len;	/* depth of the FIFO buffer */
 	u32			max_freq;	/* max bus freq supported */
 
 	u16			bus_num;
-- 
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