linux-kernel - [PATCH] i2c: enable async suspend/resume on i2c devices

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Date:   Thu, 26 Jul 2018 15:55:08 -0700
From:   Derek Basehore <dbasehore@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     wsa@...-dreams.de, linux-i2c@...r.kernel.org,
        dianders@...omium.org, dtor@...omium.org,
        venkateswarlu.v.vinjamuri@...el.corp-partner.google.com,
        Derek Basehore <dbasehore@...omium.org>
Subject: [PATCH] i2c: enable async suspend/resume on i2c devices

This enables the async suspend property for i2c devices. This reduces
the suspend/resume time considerably on platforms with multiple i2c
devices (such as a trackpad or touchscreen).

Signed-off-by: Derek Basehore <dbasehore@...omium.org>
---
 drivers/i2c/i2c-core-base.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 1ba40bb2b966..3382bb7e1dcc 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -749,6 +749,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
 	client->dev.of_node = info->of_node;
 	client->dev.fwnode = info->fwnode;
 
+	device_enable_async_suspend(&client->dev);
 	i2c_dev_set_name(adap, client, info);
 
 	if (info->properties) {
-- 
2.18.0.345.g5c9ce644c3-goog