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w1: omap-hdq: print dev_err if irq flags are not cleared

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If irq flags are not cleared for certain operations we
print an error message.

Since this should never occur in normal operation, this
patch is an optional safety-net and debugging tool.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/2de305d3046c7281a7123347899abbaa64c54fb8.1590255176.git.hns@goldelico.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H. Nikolaus Schaller 2020-05-23 19:32:57 +02:00 • committed by Greg Kroah-Hartman
parent 13db4c40fe
commit 0cfcfb314d
1 changed files with 8 additions and 0 deletions
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8
drivers/w1/masters/omap_hdq.c
View file

@ -146,6 +146,10 @@ static int hdq_write_byte(struct hdq_data *hdq_data, u8 val, u8 *status)
goto rtn;
}
if (hdq_data->hdq_irqstatus)
dev_err(hdq_data->dev, "TX irqstatus not cleared (%02x)\n",
hdq_data->hdq_irqstatus);
*status = 0;
hdq_reg_out(hdq_data, OMAP_HDQ_TX_DATA, val);
@ -243,6 +247,10 @@ static int omap_hdq_break(struct hdq_data *hdq_data)
goto rtn;
}
if (hdq_data->hdq_irqstatus)
dev_err(hdq_data->dev, "break irqstatus not cleared (%02x)\n",
hdq_data->hdq_irqstatus);
/* set the INIT and GO bit */
hdq_reg_merge(hdq_data, OMAP_HDQ_CTRL_STATUS,
OMAP_HDQ_CTRL_STATUS_INITIALIZATION | OMAP_HDQ_CTRL_STATUS_GO,