----- Original Message -----
From: <ext-eero.nurkkala@xxxxxxxxx>
To: <linux-omap@xxxxxxxxxxxxxxx>
Cc: "Eero Nurkkala" <ext-eero.nurkkala@xxxxxxxxx>
Sent: Tuesday, November 11, 2008 12:21 PM
Subject: [PATCH] i2c: i2c-omap: Fix BUFSTAT_REG reading
From: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>
The amount of bytes to receive is read from wrong
place. It is the 6 bits starting from the bit 8 from
BUFSTAT_REG that indicate this amount. Not the 8 LSB:s.
6 LSB:s are used for the TX buffer.
Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>
---
drivers/i2c/busses/i2c-omap.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index a999606..f15668d 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -621,8 +621,9 @@ omap_i2c_isr(int this_irq, void *dev_id)
if (stat & OMAP_I2C_STAT_RRDY)
num_bytes = dev->fifo_size;
else
- num_bytes = omap_i2c_read_reg(dev,
- OMAP_I2C_BUFSTAT_REG);
+ num_bytes = (omap_i2c_read_reg(dev,
+ OMAP_I2C_BUFSTAT_REG)
+ >> 8) & 0x3F;
}
I believe "And"ing by 0x3F will apply to transmit also.
while (num_bytes) {
num_bytes--;
--
1.6.0
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