From: Felipe Balbi <balbi@xxxxxx>
According to flow diagrams on OMAP TRMs,
we should ACK the IRQ as they happen.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
[ack the stat OMAP_I2C_STAT_AL in case of arbitration lost]
Signed-off-by: Shubhrajyoti D <shubhrajyoti@xxxxxx>
---
v5 - ack the OMAP_I2C_STAT_AL.
drivers/i2c/busses/i2c-omap.c | 28 ++++++++++++++++------------
1 files changed, 16 insertions(+), 12 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 78fc274..62ad126 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -847,21 +847,19 @@ omap_i2c_isr(int this_irq, void *dev_id)
}
complete:
- /*
- * Ack the stat in one go, but [R/X]DR and [R/X]RDY should be
- * acked after the data operation is complete.
- * Ref: TRM SWPU114Q Figure 18-31
- */
- omap_i2c_write_reg(dev, OMAP_I2C_STAT_REG, stat &
- ~(OMAP_I2C_STAT_RRDY | OMAP_I2C_STAT_RDR |
- OMAP_I2C_STAT_XRDY | OMAP_I2C_STAT_XDR));
-
- if (stat & OMAP_I2C_STAT_NACK)
+ if (stat & OMAP_I2C_STAT_NACK) {
err |= OMAP_I2C_STAT_NACK;
+ omap_i2c_ack_stat(dev, OMAP_I2C_STAT_NACK);
+ omap_i2c_complete_cmd(dev, err);
+ return IRQ_HANDLED;
+ }
if (stat & OMAP_I2C_STAT_AL) {
dev_err(dev->dev, "Arbitration lost\n");
err |= OMAP_I2C_STAT_AL;
+ omap_i2c_ack_stat(dev, OMAP_I2C_STAT_AL);
+ omap_i2c_complete_cmd(dev, err);
+ return IRQ_HANDLED;
}
/*
@@ -938,12 +936,18 @@ complete:
if (stat & OMAP_I2C_STAT_ROVR) {
dev_err(dev->dev, "Receive overrun\n");
- dev->cmd_err |= OMAP_I2C_STAT_ROVR;
+ err |= OMAP_I2C_STAT_ROVR;
+ omap_i2c_ack_stat(dev, OMAP_I2C_STAT_ROVR);
+ omap_i2c_complete_cmd(dev, err);
+ return IRQ_HANDLED;
}
if (stat & OMAP_I2C_STAT_XUDF) {
dev_err(dev->dev, "Transmit underflow\n");
- dev->cmd_err |= OMAP_I2C_STAT_XUDF;
+ err |= OMAP_I2C_STAT_XUDF;
+ omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XUDF);
+ omap_i2c_complete_cmd(dev, err);
+ return IRQ_HANDLED;
}
} while (stat);
--
1.7.5.4
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