diff options
| author | Tony Lindgren <tony@atomide.com> | 2016-05-31 23:17:06 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-06-22 17:58:07 +0200 |
| commit | 0ac3c0a4025f41748a083bdd4970cb3ede802b15 (patch) | |
| tree | 45a0b3413cbe8c3d67b59709cbb67d7e7648005e /drivers/pinctrl/pinctrl-single.c | |
| parent | pinctrl: imx: Do not treat a PIN without MUX register as an error (diff) | |
| download | linux-0ac3c0a4025f41748a083bdd4970cb3ede802b15.tar.xz linux-0ac3c0a4025f41748a083bdd4970cb3ede802b15.zip | |
pinctrl: single: Fix missing flush of posted write for a wakeirq
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.
Cc: stable@vger.kernel.org
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-single.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-single.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index cf9bafa10acf..bfdf720db270 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1580,6 +1580,9 @@ 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); } |