From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: Re: [PATCH v10 7/7] i2c: fsi: Add bus recovery Date: Tue, 26 Jun 2018 11:38:33 +0900 Message-ID: <20180626023833.iwjz7pqnhf4jd3w5@ninjato> References: <1528918579-27602-1-git-send-email-eajames@linux.vnet.ibm.com> <1528918579-27602-8-git-send-email-eajames@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1528918579-27602-8-git-send-email-eajames@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org To: Eddie James Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, benh@kernel.crashing.org, joel@jms.id.au, mark.rutland@arm.com, gregkh@linuxfoundation.org, rdunlap@infradead.org, andy.shevchenko@gmail.com, peda@axentia.se List-Id: devicetree@vger.kernel.org On Wed, Jun 13, 2018 at 02:36:19PM -0500, Eddie James wrote: > Bus recovery should reset the engine and force clock the bus 9 times > to recover most situations. > > Signed-off-by: Eddie James > --- > drivers/i2c/busses/i2c-fsi.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-fsi.c b/drivers/i2c/busses/i2c-fsi.c > index d6cab4b..940b198 100644 > --- a/drivers/i2c/busses/i2c-fsi.c > +++ b/drivers/i2c/busses/i2c-fsi.c > @@ -611,6 +611,24 @@ static u32 fsi_i2c_functionality(struct i2c_adapter *adap) > I2C_FUNC_SMBUS_BLOCK_DATA; > } > > +static int fsi_i2c_recover_bus(struct i2c_adapter *adap) > +{ > + int rc; > + struct fsi_i2c_port *port = adap->algo_data; > + struct fsi_i2c_master *master = port->master; > + > + mutex_lock(&master->lock); > + > + rc = fsi_i2c_reset(master, port->port); > + > + mutex_unlock(&master->lock); > + return rc; > +} > + > +static struct i2c_bus_recovery_info fsi_i2c_bus_recovery_info = { > + .recover_bus = fsi_i2c_recover_bus, > +}; > + This all won't have any effect since you never call i2c_recover_bus which calls back into i2c_bus_recovery_info callbacks.