From mboxrd@z Thu Jan 1 00:00:00 1970 From: antoine.tenart@free-electrons.com (Antoine Tenart) Date: Wed, 26 Oct 2016 16:57:55 +0200 Subject: [RFC PATCH 4/5] w1: add a callback to call slave when a new device is connected In-Reply-To: <20161026145756.21689-1-antoine.tenart@free-electrons.com> References: <20161026145756.21689-1-antoine.tenart@free-electrons.com> Message-ID: <20161026145756.21689-5-antoine.tenart@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds the possibility for slave drivers to register a callback, to be called whenever a new device matching the slave ID is connected. Signed-off-by: Antoine Tenart --- drivers/w1/w1.c | 10 ++++++++++ drivers/w1/w1_family.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 80d0cc4e6e7f..7010ffd1ea93 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -659,6 +659,16 @@ static int w1_family_notify(unsigned long action, struct w1_slave *sl) return err; } } + if (fops->callback) { + err = fops->callback(sl); + /* + * Do not return an error as the slave driver correctly + * probed. + */ + if (err) + dev_err(&sl->dev, + "callback call failed. err=%d\n", err); + } break; case BUS_NOTIFY_DEL_DEVICE: diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 10a7a0767187..5e165babc6f3 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -55,11 +55,13 @@ struct w1_slave; * @add_slave: add_slave * @remove_slave: remove_slave * @groups: sysfs group + * @callback: called when a new device is discovered */ struct w1_family_ops { int (* add_slave)(struct w1_slave *); void (* remove_slave)(struct w1_slave *); + int (* callback)(struct w1_slave *); const struct attribute_group **groups; }; -- 2.10.1