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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-01-11 17:47:25 -0800 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-01-11 17:47:25 -0800 |
commit | 009f773836513960d3982e80c86e266d25528563 (patch) | |
tree | 7315e5666698997dee34a80c1a1db801d3f8879b /drivers/input/serio/i8042.c | |
parent | dd0d0d4de582a6a61c032332c91f4f4cb2bab569 (diff) | |
parent | 6544a1df11c48c8413071aac3316792e4678fbfb (diff) |
Merge branch 'next' into for-linus
Prepare first round of input updates for 4.5 merge window.
Diffstat (limited to 'drivers/input/serio/i8042.c')
-rw-r--r-- | drivers/input/serio/i8042.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index db91de539ee3..454195709a82 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -24,6 +24,7 @@ #include <linux/platform_device.h> #include <linux/i8042.h> #include <linux/slab.h> +#include <linux/suspend.h> #include <asm/io.h> @@ -1170,7 +1171,8 @@ static int i8042_pm_suspend(struct device *dev) { int i; - i8042_controller_reset(true); + if (pm_suspend_via_firmware()) + i8042_controller_reset(true); /* Set up serio interrupts for system wakeup. */ for (i = 0; i < I8042_NUM_PORTS; i++) { @@ -1183,8 +1185,17 @@ static int i8042_pm_suspend(struct device *dev) return 0; } +static int i8042_pm_resume_noirq(struct device *dev) +{ + if (!pm_resume_via_firmware()) + i8042_interrupt(0, NULL); + + return 0; +} + static int i8042_pm_resume(struct device *dev) { + bool force_reset; int i; for (i = 0; i < I8042_NUM_PORTS; i++) { @@ -1195,11 +1206,21 @@ static int i8042_pm_resume(struct device *dev) } /* - * On resume from S2R we always try to reset the controller - * to bring it in a sane state. (In case of S2D we expect - * BIOS to reset the controller for us.) + * If platform firmware was not going to be involved in suspend, we did + * not restore the controller state to whatever it had been at boot + * time, so we do not need to do anything. */ - return i8042_controller_resume(true); + if (!pm_suspend_via_firmware()) + return 0; + + /* + * We only need to reset the controller if we are resuming after handing + * off control to the platform firmware, otherwise we can simply restore + * the mode. + */ + force_reset = pm_resume_via_firmware(); + + return i8042_controller_resume(force_reset); } static int i8042_pm_thaw(struct device *dev) @@ -1223,6 +1244,7 @@ static int i8042_pm_restore(struct device *dev) static const struct dev_pm_ops i8042_pm_ops = { .suspend = i8042_pm_suspend, + .resume_noirq = i8042_pm_resume_noirq, .resume = i8042_pm_resume, .thaw = i8042_pm_thaw, .poweroff = i8042_pm_reset, |