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| author |   Daniel Drake <drake@endlessm.com> | 2017-09-11 14:11:56 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2017-09-12 15:58:45 +0200 |
| commit | 79d2c8bede2c93f9432d7da0bc2f76a195c90fc0 (patch) | |
| tree | 380ab56d10c279b0d5ff9d13a63a461d11c2ba31 /drivers/pinctrl/pinctrl-amd.h | |
| parent | pinctrl: armada-37xx: Fix gpio interrupt setup (diff) | |
| download | linux-dev-79d2c8bede2c93f9432d7da0bc2f76a195c90fc0.tar.xz linux-dev-79d2c8bede2c93f9432d7da0bc2f76a195c90fc0.zip | |
pinctrl/amd: save pin registers over suspend/resume
The touchpad in the Asus laptop models X505BA/BP and X542BA/BP is
unresponsive after suspend/resume. The following error appears during
resume:
i2c_hid i2c-ELAN1300:00: failed to reset device.
The problem here is that i2c_hid does not notice the interrupt being
generated at this point, because the GPIO is no longer configured
for interrupts.
Fix this by saving pinctrl-amd pin registers during suspend and
restoring them at resume time.
Based on code from pinctrl-intel.
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/pinctrl/pinctrl-amd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-amd.h b/drivers/pinctrl/pinctrl-amd.h index 5b1cb965c767..8fa453a59da5 100644 --- a/drivers/pinctrl/pinctrl-amd.h +++ b/drivers/pinctrl/pinctrl-amd.h @@ -97,6 +97,7 @@ struct amd_gpio { unsigned int hwbank_num; struct resource *res; struct platform_device *pdev; + u32 *saved_regs; }; /* KERNCZ configuration*/ |