diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index 89afad7bb16e..eeb187e558ce 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -227,9 +227,20 @@ static int cros_ec_lpc_readmem(struct cros_ec_device *ec, unsigned int offset, return cnt; } +static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data) +{ + struct cros_ec_device *ec_dev = data; + + if (ec_dev->mkbp_event_supported && cros_ec_get_next_event(ec_dev) > 0) + blocking_notifier_call_chain(&ec_dev->event_notifier, 0, + ec_dev); +} + static int cros_ec_lpc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct acpi_device *adev; + acpi_status status; struct cros_ec_device *ec_dev; u8 buf[2]; int ret; @@ -277,12 +288,33 @@ static int cros_ec_lpc_probe(struct platform_device *pdev) return ret; } + /* + * Connect a notify handler to process MKBP messages if we have a + * companion ACPI device. + */ + adev = ACPI_COMPANION(dev); + if (adev) { + status = acpi_install_notify_handler(adev->handle, + ACPI_ALL_NOTIFY, + cros_ec_lpc_acpi_notify, + ec_dev); + if (ACPI_FAILURE(status)) + dev_warn(dev, "Failed to register notifier %08x\n", + status); + } + return 0; } static int cros_ec_lpc_remove(struct platform_device *pdev) { struct cros_ec_device *ec_dev; + struct acpi_device *adev; + + adev = ACPI_COMPANION(&pdev->dev); + if (adev) + acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY, + cros_ec_lpc_acpi_notify); ec_dev = platform_get_drvdata(pdev); cros_ec_remove(ec_dev); |