From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org, kernel@pengutronix.de,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH/RFT 3/6] i2c: designware: set SDA as output for recovery
Date: Fri, 13 Jul 2018 23:09:15 +0200 [thread overview]
Message-ID: <20180713210920.3648-4-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20180713210920.3648-1-wsa+renesas@sang-engineering.com>
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@sang-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
next prev parent reply other threads:[~2018-07-13 21:10 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-13 21:09 [PATCH/RFT 0/6] i2c: recovery: fix GPIO usage for recovery Wolfram Sang
2018-07-13 21:09 ` Wolfram Sang
2018-07-13 21:09 ` Wolfram Sang
2018-07-13 21:09 ` [PATCH/RFT 1/6] i2c: designware: use open drain for recovery GPIO Wolfram Sang
2018-07-16 0:47 ` Phil Reid
2018-07-17 9:09 ` Wolfram Sang
2018-07-17 9:27 ` Phil Reid
2018-07-24 7:26 ` Wolfram Sang
2018-07-25 3:26 ` Phil Reid
2018-07-13 21:09 ` [PATCH/RFT 2/6] i2c: imx: " Wolfram Sang
2018-07-23 12:47 ` Lucas Stach
2018-07-24 7:28 ` Wolfram Sang
2018-07-24 13:01 ` Wolfram Sang
2018-07-13 21:09 ` Wolfram Sang [this message]
2018-07-13 21:09 ` [PATCH/RFT 4/6] i2c: davinci: set SDA as output for recovery Wolfram Sang
2018-07-13 21:09 ` Wolfram Sang
2018-07-13 21:09 ` [PATCH/RFT 5/6] i2c: imx: " Wolfram Sang
2018-07-13 21:09 ` [PATCH/RFT 6/6] i2c: recovery: remove bogus check if SDA GPIO is set to output Wolfram Sang
2018-07-16 9:29 ` Ulrich Hecht
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