linux-kernel - [PATCH 14/15] staging: gasket: apex: place in low power reset until opened

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Message-Id: <20180805200749.116693-15-toddpoynor@gmail.com>
Date:   Sun,  5 Aug 2018 13:07:48 -0700
From:   Todd Poynor <toddpoynor@...il.com>
To:     Rob Springer <rspringer@...gle.com>,
        John Joseph <jnjoseph@...gle.com>,
        Ben Chan <benchan@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Todd Poynor <toddpoynor@...gle.com>
Subject: [PATCH 14/15] staging: gasket: apex: place in low power reset until opened

From: Todd Poynor <toddpoynor@...gle.com>

The apex device is left out of reset mode at the end of device
probe/initialize processing.  Add a call to enter reset at the end of
the sequence, triggering power gating and other low power features.

Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
---
 drivers/staging/gasket/apex_driver.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/gasket/apex_driver.c b/drivers/staging/gasket/apex_driver.c
index 55319619b2e66..c747e9ca45186 100644
--- a/drivers/staging/gasket/apex_driver.c
+++ b/drivers/staging/gasket/apex_driver.c
@@ -644,6 +644,10 @@ static int apex_pci_probe(struct pci_dev *pci_dev,
 		goto remove_device;
 	}
 
+	/* Place device in low power mode until opened */
+	if (allow_power_save)
+		apex_enter_reset(gasket_dev);
+
 	return 0;
 
 remove_device:
-- 
2.18.0.597.ga71716f1ad-goog