linux-kernel - [PATCH] mfd: cros_ec: Send correct suspend/resume event to EC

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Message-Id: <1484319872-26816-1-git-send-email-thierry.escande@collabora.com>
Date:   Fri, 13 Jan 2017 16:04:32 +0100
From:   Thierry Escande <thierry.escande@...labora.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: cros_ec: Send correct suspend/resume event to EC

From: Shawn Nematbakhsh <shawnn@...omium.org>

pm_suspend_via_firmware() will return false for platforms with ACPI
disabled and ACPI is a prerequisite for S0ix support.

With this patch, sleep state event sent to EC is forced to S3 if ACPI is
disabled.

Signed-off-by: Shawn Nematbakhsh <shawnn@...omium.org>
Signed-off-by: Thierry Escande <thierry.escande@...labora.com>
---
 drivers/mfd/cros_ec.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index b8a5080..9b66a98 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -190,8 +190,9 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev)
 	int ret;
 	u8 sleep_event;
 
-	sleep_event = pm_suspend_via_firmware() ? HOST_SLEEP_EVENT_S3_RESUME :
-						  HOST_SLEEP_EVENT_S0IX_RESUME;
+	sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ?
+		      HOST_SLEEP_EVENT_S3_RESUME :
+		      HOST_SLEEP_EVENT_S0IX_RESUME;
 
 	ret = cros_ec_sleep_event(ec_dev, sleep_event);
 	if (ret < 0)
@@ -224,8 +225,9 @@ int cros_ec_resume(struct cros_ec_device *ec_dev)
 	ec_dev->suspended = false;
 	enable_irq(ec_dev->irq);
 
-	sleep_event = pm_suspend_via_firmware() ? HOST_SLEEP_EVENT_S3_RESUME :
-						  HOST_SLEEP_EVENT_S0IX_RESUME;
+	sleep_event = (!IS_ENABLED(CONFIG_ACPI) || pm_suspend_via_firmware()) ?
+		      HOST_SLEEP_EVENT_S3_RESUME :
+		      HOST_SLEEP_EVENT_S0IX_RESUME;
 
 	ret = cros_ec_sleep_event(ec_dev, sleep_event);
 	if (ret < 0)
-- 
2.7.4