[PATCHv3 10/17] i2c: omap: ack IRQ in parts
From: Shubhrajyoti D <hidden>
Date: 2012-06-29 10:13:30
Also in:
linux-i2c, linux-omap
Subsystem:
i2c subsystem, i2c subsystem host drivers, omap i2c driver, omap1 support, omap2+ support, the rest · Maintainers:
Wolfram Sang, Andi Shyti, Vignesh R, Aaro Koskinen, Janusz Krzysztofik, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Felipe Balbi <redacted> According to flow diagrams on OMAP TRMs, we should ACK the IRQ as they happen. Signed-off-by: Felipe Balbi <redacted> Signed-off-by: Shubhrajyoti D <redacted> --- 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 e4b83af..6e4c2be 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c@@ -869,21 +869,19 @@ 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_NACK); + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; } /*
@@ -964,12 +962,18 @@ 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