From: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>
The number of bytes to be received is read from wrong
place with all OMAPs with highspeed I2C support,
which involves a FIFO and BUFSTAT_REG. It is the 6
bits starting from the bit 8 in the BUFSTAT_REG
that indicate this amount of bytes to be read.
Moreover, only the 6 LSB:s are relevant for the
TXSTAT field.
Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Ari Kauppi <Ext-Ari.Kauppi@xxxxxxxxx>
Acked-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
---
drivers/i2c/busses/i2c-omap.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index be8ee2c..0c3ed41 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -675,8 +675,9 @@ 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;
}
while (num_bytes) {
num_bytes--;
@@ -714,8 +715,9 @@ omap_i2c_isr(int this_irq, void *dev_id)
if (stat & OMAP_I2C_STAT_XRDY)
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))
+ & 0x3F;
}
while (num_bytes) {
num_bytes--;
--
1.5.6.5
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