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authorDaniel Drake <drake@endlessm.com>2017-09-11 14:11:56 +0800
committerLinus Walleij <linus.walleij@linaro.org>2017-09-12 15:58:45 +0200
commit79d2c8bede2c93f9432d7da0bc2f76a195c90fc0 (patch)
tree380ab56d10c279b0d5ff9d13a63a461d11c2ba31 /drivers/pinctrl/pinctrl-amd.h
parenta9a1a4833613b8a2e8dd79f860ea1871f17da02c (diff)
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 'drivers/pinctrl/pinctrl-amd.h')
-rw-r--r--drivers/pinctrl/pinctrl-amd.h1
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*/