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i2c-omap: Bug in reading the RXSTAT/TXSTAT values from the I2C_BUFFSTAT register 

Fix bug in reading the I2C_BUFFSTAT register for getting byte count on RX/TX interrupt.

On Interrupt: I2C_STAT[RDR],
	read 'RXSTAT' from I2C_BUFFSTAT[8-13]
On Interrupt: I2C_STAT[XDR]
	read 'TXSTAT' from I2C_BUFFSTAT[0-5]

Signed-off-by: Jagadeesh Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Vikram pandita <vikram.pandita@ti.com>
[ben-linux@fluff.org: fixed mail format and added i2c-omap to subject]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Sonasath, Moiz 2009-07-21 10:14:06 -05:00 committed by Ben Dooks
parent ccb3bc16b4
commit bfb6b6588a
1 changed files with 7 additions and 5 deletions
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12
drivers/i2c/busses/i2c-omap.c
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@ -692,9 +692,10 @@ omap_i2c_isr(int this_irq, void *dev_id)
if (dev->fifo_size) { if (dev->fifo_size) {
if (stat & OMAP_I2C_STAT_RRDY) if (stat & OMAP_I2C_STAT_RRDY)
num_bytes = dev->fifo_size; num_bytes = dev->fifo_size;
else else /* read RXSTAT on RDR interrupt */
num_bytes = omap_i2c_read_reg(dev, num_bytes = (omap_i2c_read_reg(dev,
OMAP_I2C_BUFSTAT_REG); OMAP_I2C_BUFSTAT_REG)
>> 8) & 0x3F;
} }
while (num_bytes) { while (num_bytes) {
num_bytes--; num_bytes--;
@ -731,9 +732,10 @@ omap_i2c_isr(int this_irq, void *dev_id)
if (dev->fifo_size) { if (dev->fifo_size) {
if (stat & OMAP_I2C_STAT_XRDY) if (stat & OMAP_I2C_STAT_XRDY)
num_bytes = dev->fifo_size; num_bytes = dev->fifo_size;
else else /* read TXSTAT on XDR interrupt */
num_bytes = omap_i2c_read_reg(dev, num_bytes = omap_i2c_read_reg(dev,
OMAP_I2C_BUFSTAT_REG); OMAP_I2C_BUFSTAT_REG)
& 0x3F;
} }
while (num_bytes) { while (num_bytes) {
num_bytes--; num_bytes--;