talos-obmc-linux/drivers/platform/chrome, branch dev-4.13

platform/chrome: cros_ec_lightbar - hide unused PM functions

2017-06-27T16:27:43+00:00

The only reference to the new functions is inside of an #ifdef, which now causes a harmless warning when CONFIG_PM_SLEEP is not set: chrome/cros_ec_dev.c:478:12: error: 'ec_device_resume' defined but not used [-Werror=unused-function] chrome/cros_ec_dev.c:469:12: error: 'ec_device_suspend' defined but not used [-Werror=unused-function] This marks the two functions as __maybe_unused so they can get silently dropped by the compiler. Fixes: 405c84308c43 ("platform/chrome: cros_ec_lightbar - Control of suspend/resume lightbar sequence") Signed-off-by: Arnd Bergmann Reviewed-by: Guenter Roeck Signed-off-by: Benson Leung

cros_ec: Don't signal wake event for non-wake host events

2017-06-27T16:19:15+00:00

The subset of wake-enabled host events is defined by the EC, but the EC may still send non-wake host events if we're in the process of suspending. Get the mask of wake-enabled host events from the EC and filter out non-wake events to prevent spurious aborted suspend attempts. Signed-off-by: Shawn Nematbakhsh Signed-off-by: Thierry Escande Acked-for-MFD-by: Lee Jones Signed-off-by: Benson Leung

cros_ec: Fix deadlock when EC is not responsive at probe

2017-06-27T15:22:39+00:00

When the EC is not responsive at probe, we try to get basic information (protocol to use) later on through cros_xfer_cmd() call. This patch makes sure there is no deadlock when re-probing the EC by replacing call to cros_xfer_cmd() with send_command() in the function cros_ec_get_host_command_version_mask(). Also, this patch adds the function header indicating it must be called protected. Signed-off-by: Gwendal Grignou Signed-off-by: Thierry Escande Signed-off-by: Benson Leung

cros_ec: Don't return error when checking command version

2017-06-27T15:22:28+00:00

With this patch, cros_ec_query_all() does not return an error if it fails to check for MKBP events support. Instead, the EC device structure indicates that it does not support MKBP events (mkbp_event_supported field) and cros_ec_query_all() returns 0. Signed-off-by: Thierry Escande Signed-off-by: Benson Leung

platform/chrome: cros_ec_lightbar - Avoid I2C xfer to EC during suspend

2017-06-23T23:12:19+00:00

A Mutex lock in cros_ec_cmd_xfer which may be held by frozen Userspace thread during system suspending. So should not call this routine in suspend thread. Signed-off-by: Jeffery Yu Signed-off-by: Guenter Roeck Signed-off-by: Enric Balletbo i Serra Signed-off-by: Benson Leung

platform/chrome: cros_ec_lightbar - Add userspace lightbar control bit to EC

2017-06-23T23:12:19+00:00

Some devices might want to turn off the lightbar if e.g. the system turns the screen off due to idleness. This prevents the kernel from going through its normal suspend/resume pathways. Signed-off-by: Eric Caruso Signed-off-by: Guenter Roeck Signed-off-by: Enric Balletbo i Serra Signed-off-by: Benson Leung

platform/chrome: cros_ec_lightbar - Control of suspend/resume lightbar sequence

2017-06-23T23:12:18+00:00

Don't let EC control suspend/resume sequence. If the EC controls the lightbar and sets the sequence when it notices the chipset transitioning between states, we can't make exceptions for cases where we don't want to activate the lightbar. Instead, let's move the suspend/resume notifications into the kernel so we can selectively play the sequences. Signed-off-by: Eric Caruso Signed-off-by: Guenter Roeck Signed-off-by: Enric Balletbo i Serra Acked-by: Lee Jones Signed-off-by: Benson Leung

platform/chrome: cros_ec_lightbar - Add lightbar program feature to sysfs

2017-06-23T23:12:17+00:00

Add a program feature so we can upload and run programs for lightbar sequences. We should be able to use this to shift sequences out of the EC and save space there. $ cat > /sys/devices/.../cros_ec/program $ echo program > /sys/devices/.../cros_ec/sequence Signed-off-by: Eric Caruso Signed-off-by: Guenter Roeck Signed-off-by: Enric Balletbo i Serra Acked-by: Lee Jones Signed-off-by: Benson Leung

platform/chrome: cros_ec_lpc: Add MKBP events support over ACPI

2017-06-23T23:12:17+00:00

This patch installs a notify handler to process MKBP events for EC firmware directing them over ACPI. Signed-off-by: Gwendal Grignou Signed-off-by: Thierry Escande Signed-off-by: Benson Leung

platform/chrome: cros_ec_lpc: Add power management ops

2017-06-23T23:12:16+00:00

This patch adds suspend and resume pm ops to the LPC ChromeOS EC driver. These LPC handlers call the croc_ec generic handlers. Signed-off-by: Archana Patni Signed-off-by: Thierry Escande Signed-off-by: Benson Leung