Commit 2b7758f5 authored by Tony Lindgren's avatar Tony Lindgren Committed by Greg Kroah-Hartman

pinctrl: single: Fix missing flush of posted write for a wakeirq

commit 0ac3c0a4 upstream.

With many repeated suspend resume cycles, the pin specific wakeirq
may not always work on omaps. This is because the write to enable the
pin interrupt may not have reached the device over the interconnect
before suspend happens.

Let's fix the issue with a flush of posted write with a readback.
Reported-by: default avatarNishanth Menon <nm@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 92abf188
......@@ -1616,6 +1616,9 @@ static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc,
else
mask &= ~soc_mask;
pcs->write(mask, pcswi->reg);
/* flush posted write */
mask = pcs->read(pcswi->reg);
raw_spin_unlock(&pcs->lock);
}
......
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