diff options
| -rw-r--r-- | drivers/platform/chrome/cros_ec.c | 116 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec.h | 4 | ||||
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 22 |
3 files changed, 116 insertions, 26 deletions
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c index 5d36fbc75e1b..badc68bbae8c 100644 --- a/drivers/platform/chrome/cros_ec.c +++ b/drivers/platform/chrome/cros_ec.c @@ -321,17 +321,8 @@ void cros_ec_unregister(struct cros_ec_device *ec_dev) EXPORT_SYMBOL(cros_ec_unregister); #ifdef CONFIG_PM_SLEEP -/** - * cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device. - * @ec_dev: Device to suspend. - * - * This can be called by drivers to handle a suspend event. - * - * Return: 0 on success or negative error code. - */ -int cros_ec_suspend(struct cros_ec_device *ec_dev) +static void cros_ec_send_suspend_event(struct cros_ec_device *ec_dev) { - struct device *dev = ec_dev->dev; int ret; u8 sleep_event; @@ -343,7 +334,26 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev) if (ret < 0) dev_dbg(ec_dev->dev, "Error %d sending suspend event to ec\n", ret); +} +/** + * cros_ec_suspend_prepare() - Handle a suspend prepare operation for the ChromeOS EC device. + * @ec_dev: Device to suspend. + * + * This can be called by drivers to handle a suspend prepare stage of suspend. + * + * Return: 0 always. + */ +int cros_ec_suspend_prepare(struct cros_ec_device *ec_dev) +{ + cros_ec_send_suspend_event(ec_dev); + return 0; +} +EXPORT_SYMBOL(cros_ec_suspend_prepare); + +static void cros_ec_disable_irq(struct cros_ec_device *ec_dev) +{ + struct device *dev = ec_dev->dev; if (device_may_wakeup(dev)) ec_dev->wake_enabled = !enable_irq_wake(ec_dev->irq); else @@ -351,7 +361,35 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev) disable_irq(ec_dev->irq); ec_dev->suspended = true; +} +/** + * cros_ec_suspend_late() - Handle a suspend late operation for the ChromeOS EC device. + * @ec_dev: Device to suspend. + * + * This can be called by drivers to handle a suspend late stage of suspend. + * + * Return: 0 always. + */ +int cros_ec_suspend_late(struct cros_ec_device *ec_dev) +{ + cros_ec_disable_irq(ec_dev); + return 0; +} +EXPORT_SYMBOL(cros_ec_suspend_late); + +/** + * cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device. + * @ec_dev: Device to suspend. + * + * This can be called by drivers to handle a suspend event. + * + * Return: 0 always. + */ +int cros_ec_suspend(struct cros_ec_device *ec_dev) +{ + cros_ec_send_suspend_event(ec_dev); + cros_ec_disable_irq(ec_dev); return 0; } EXPORT_SYMBOL(cros_ec_suspend); @@ -370,22 +408,11 @@ static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev) } } -/** - * cros_ec_resume() - Handle a resume operation for the ChromeOS EC device. - * @ec_dev: Device to resume. - * - * This can be called by drivers to handle a resume event. - * - * Return: 0 on success or negative error code. - */ -int cros_ec_resume(struct cros_ec_device *ec_dev) +static void cros_ec_send_resume_event(struct cros_ec_device *ec_dev) { int ret; u8 sleep_event; - ec_dev->suspended = false; - enable_irq(ec_dev->irq); - sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ? HOST_SLEEP_EVENT_S3_RESUME : HOST_SLEEP_EVENT_S0IX_RESUME; @@ -394,6 +421,24 @@ int cros_ec_resume(struct cros_ec_device *ec_dev) if (ret < 0) dev_dbg(ec_dev->dev, "Error %d sending resume event to ec\n", ret); +} + +/** + * cros_ec_resume_complete() - Handle a resume complete operation for the ChromeOS EC device. + * @ec_dev: Device to resume. + * + * This can be called by drivers to handle a resume complete stage of resume. + */ +void cros_ec_resume_complete(struct cros_ec_device *ec_dev) +{ + cros_ec_send_resume_event(ec_dev); +} +EXPORT_SYMBOL(cros_ec_resume_complete); + +static void cros_ec_enable_irq(struct cros_ec_device *ec_dev) +{ + ec_dev->suspended = false; + enable_irq(ec_dev->irq); if (ec_dev->wake_enabled) disable_irq_wake(ec_dev->irq); @@ -403,8 +448,35 @@ int cros_ec_resume(struct cros_ec_device *ec_dev) * suspend. This way the clients know what to do with them. */ cros_ec_report_events_during_suspend(ec_dev); +} +/** + * cros_ec_resume_early() - Handle a resume early operation for the ChromeOS EC device. + * @ec_dev: Device to resume. + * + * This can be called by drivers to handle a resume early stage of resume. + * + * Return: 0 always. + */ +int cros_ec_resume_early(struct cros_ec_device *ec_dev) +{ + cros_ec_enable_irq(ec_dev); + return 0; +} +EXPORT_SYMBOL(cros_ec_resume_early); +/** + * cros_ec_resume() - Handle a resume operation for the ChromeOS EC device. + * @ec_dev: Device to resume. + * + * This can be called by drivers to handle a resume event. + * + * Return: 0 always. + */ +int cros_ec_resume(struct cros_ec_device *ec_dev) +{ + cros_ec_enable_irq(ec_dev); + cros_ec_send_resume_event(ec_dev); return 0; } EXPORT_SYMBOL(cros_ec_resume); diff --git a/drivers/platform/chrome/cros_ec.h b/drivers/platform/chrome/cros_ec.h index 2b2574236030..6b95f1e0bace 100644 --- a/drivers/platform/chrome/cros_ec.h +++ b/drivers/platform/chrome/cros_ec.h @@ -16,7 +16,11 @@ int cros_ec_register(struct cros_ec_device *ec_dev); void cros_ec_unregister(struct cros_ec_device *ec_dev); int cros_ec_suspend(struct cros_ec_device *ec_dev); +int cros_ec_suspend_late(struct cros_ec_device *ec_dev); +int cros_ec_suspend_prepare(struct cros_ec_device *ec_dev); int cros_ec_resume(struct cros_ec_device *ec_dev); +int cros_ec_resume_early(struct cros_ec_device *ec_dev); +void cros_ec_resume_complete(struct cros_ec_device *ec_dev); irqreturn_t cros_ec_irq_thread(int irq, void *data); diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index 897090f0f26e..f0f3d3d56157 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -547,22 +547,36 @@ MODULE_DEVICE_TABLE(dmi, cros_ec_lpc_dmi_table); static int cros_ec_lpc_prepare(struct device *dev) { struct cros_ec_device *ec_dev = dev_get_drvdata(dev); - - return cros_ec_suspend(ec_dev); + return cros_ec_suspend_prepare(ec_dev); } static void cros_ec_lpc_complete(struct device *dev) { struct cros_ec_device *ec_dev = dev_get_drvdata(dev); - cros_ec_resume(ec_dev); + cros_ec_resume_complete(ec_dev); +} + +static int cros_ec_lpc_suspend_late(struct device *dev) +{ + struct cros_ec_device *ec_dev = dev_get_drvdata(dev); + + return cros_ec_suspend_late(ec_dev); +} + +static int cros_ec_lpc_resume_early(struct device *dev) +{ + struct cros_ec_device *ec_dev = dev_get_drvdata(dev); + + return cros_ec_resume_early(ec_dev); } #endif static const struct dev_pm_ops cros_ec_lpc_pm_ops = { #ifdef CONFIG_PM_SLEEP .prepare = cros_ec_lpc_prepare, - .complete = cros_ec_lpc_complete + .complete = cros_ec_lpc_complete, #endif + SET_LATE_SYSTEM_SLEEP_PM_OPS(cros_ec_lpc_suspend_late, cros_ec_lpc_resume_early) }; static struct platform_driver cros_ec_lpc_driver = { |