i2c: omap: bus: add a receiver flag

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@ti.com>
[Remove unnecessary braces]
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 0da8169ca5b4..3be147ab4eb9 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;
@@ -492,6 +493,7 @@ 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;
 
@@ -837,6 +839,12 @@ 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 */
                         return IRQ_HANDLED;