[PATCH 13/17] i2c: omap: bus: add a receiver flag

Felipe Balbi
2012-06-14T10:20:46Z

that way we can ignore TX IRQs while in receiver
mode and ignore RX IRQs while in transmitter mode.

Signed-off-by: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
---
drivers/i2c/busses/i2c-omap.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 43d3289..fad5f6f 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -199,6 +199,7 @@ struct omap_i2c_dev {
*/
u8 rev;
unsigned b_hw:1; /* bad h/w fixes */
+ unsigned receiver:1; /* true when we're in receiver mode */
u16 iestate; /* Saved interrupt register */
u16 pscstate;
u16 scllstate;
@@ -538,6 +539,7 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,

init_completion(&dev->cmd_complete);
dev->cmd_err = 0;
+ dev->receiver = !!(msg->flags & I2C_M_RD);

w = OMAP_I2C_CON_EN | OMAP_I2C_CON_MST | OMAP_I2C_CON_STT;

@@ -880,6 +882,13 @@ omap_i2c_isr(int this_irq, void *dev_id)
stat = omap_i2c_read_reg(dev, OMAP_I2C_STAT_REG);
stat &= bits;

+ /* If we're in receiver mode, ignore XDR/XRDY */
+ if (dev->receiver) {
+ stat &= ~(OMAP_I2C_STAT_XDR | OMAP_I2C_STAT_XRDY);
+ } else {
+ stat &= ~(OMAP_I2C_STAT_RDR | OMAP_I2C_STAT_RRDY);
+ }
+
if (!stat) {
/* my work here is done */
omap_i2c_complete_cmd(dev, err);
--
1.7.10.4