diff options
| author | Rajat Jain <rajatja@google.com> | 2017-04-03 21:53:41 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-04-03 21:59:57 +0300 |
| commit | e6eba3fac9a0eb2018a85505b91740e27c60fdba (patch) | |
| tree | e765d4afcbf56564654c2af9562c6159d88cec47 | |
| parent | f6f08c55cced6885f1e1448cd0806098e836c5f5 (diff) | |
| download | linux-e6eba3fac9a0eb2018a85505b91740e27c60fdba.tar.xz | |
Input: cros_ec_keyb - add an EC event for sysrq
Some form factors (detachables/tablets) may not have a keyboard and
thus user may have to resort to using a defined EC UI to send sysrq(s)
to the kernel in order to collect crash info etc. This UI typically
is in the form of user pressing volume / power buttons in some specific
sequence and for some specific time. Add a new EC event that allows EC
to communicate the sysrq to the AP.
(We're skipping event number 5 because it has been reserved for
something else)
Signed-off-by: Rajat Jain <rajatja@google.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | drivers/input/keyboard/cros_ec_keyb.c | 7 | ||||
| -rw-r--r-- | include/linux/mfd/cros_ec_commands.h | 4 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c index 6a250d65f8fe..c7a8120b13c0 100644 --- a/drivers/input/keyboard/cros_ec_keyb.c +++ b/drivers/input/keyboard/cros_ec_keyb.c @@ -30,6 +30,7 @@ #include <linux/notifier.h> #include <linux/platform_device.h> #include <linux/slab.h> +#include <linux/sysrq.h> #include <linux/input/matrix_keypad.h> #include <linux/mfd/cros_ec.h> #include <linux/mfd/cros_ec_commands.h> @@ -260,6 +261,12 @@ static int cros_ec_keyb_work(struct notifier_block *nb, ckdev->ec->event_size); break; + case EC_MKBP_EVENT_SYSRQ: + val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq); + dev_dbg(ckdev->dev, "sysrq code from EC: %#x\n", val); + handle_sysrq(val); + break; + case EC_MKBP_EVENT_BUTTON: case EC_MKBP_EVENT_SWITCH: /* diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index da1c188562bc..3ceebf6b9afb 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -2040,6 +2040,9 @@ enum ec_mkbp_event { /* The state of the switches have changed. */ EC_MKBP_EVENT_SWITCH = 4, + /* EC sent a sysrq command */ + EC_MKBP_EVENT_SYSRQ = 6, + /* Number of MKBP events */ EC_MKBP_EVENT_COUNT, }; @@ -2052,6 +2055,7 @@ union ec_response_get_next_data { uint32_t buttons; uint32_t switches; + uint32_t sysrq; } __packed; struct ec_response_get_next_event { |