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| author | Daniel Drake <drake@endlessm.com> | 2017-09-11 06:11:56 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-09-27 12:39:19 (GMT) |
| commit | 6053a5fec5692f65b1dcf191ef88f147fc0f7525 (patch) | |
| tree | df1ef60f75515b214f0f747df84573c18dacd7af /drivers/pinctrl/pinctrl-amd.h | |
| parent | 346abf2aca7faeea9f7d615239e94b37b0ee6df2 (diff) | |
| download | linux-6053a5fec5692f65b1dcf191ef88f147fc0f7525.tar.xz | |
pinctrl/amd: save pin registers over suspend/resume
commit 79d2c8bede2c93f9432d7da0bc2f76a195c90fc0 upstream.
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.
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pinctrl/pinctrl-amd.h')
| -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 7bfea47..e8bbb20 100644 --- a/drivers/pinctrl/pinctrl-amd.h +++ b/drivers/pinctrl/pinctrl-amd.h @@ -95,6 +95,7 @@ struct amd_gpio { struct gpio_chip gc; struct resource *res; struct platform_device *pdev; + u32 *saved_regs; }; /* KERNCZ configuration*/ |