linux-kernel - [PATCH/RFT 3/6] i2c: designware: set SDA as output for recovery

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Message-Id: <20180713210920.3648-4-wsa+renesas@sang-engineering.com>
Date:   Fri, 13 Jul 2018 23:09:15 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-i2c@...r.kernel.org
Cc:     linux-renesas-soc@...r.kernel.org, kernel@...gutronix.de,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH/RFT 3/6] i2c: designware: set SDA as output for recovery

This allows for sending STOP when generating pulses which is much more
robust because it will bring clients into a default state.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 drivers/i2c/busses/i2c-designware-master.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index a546db80f53e..25981efc844e 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -674,7 +674,7 @@ static int i2c_dw_init_recovery_info(struct dw_i2c_dev *dev)
 	}
 	rinfo->scl_gpiod = gpio;
 
-	gpio = devm_gpiod_get_optional(dev->dev, "sda", GPIOD_IN);
+	gpio = devm_gpiod_get_optional(dev->dev, "sda", GPIOD_OUT_HIGH_OPEN_DRAIN);
 	if (IS_ERR(gpio))
 		return PTR_ERR(gpio);
 	rinfo->sda_gpiod = gpio;
-- 
2.11.0