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From: Przemyslaw Gaj <pgaj@cadence.com>
To: <bbrezillon@kernel.org>
Cc: linux-i3c@lists.infradead.org, agolec@cadence.com,
	Przemyslaw Gaj <pgaj@cadence.com>,
	rafalc@cadence.com, vitor.soares@synopsys.com
Subject: [PATCH v5 3/7] i3c: export i3c_bus_set_mode function
Date: Sat, 22 Jun 2019 21:55:01 +0100
Message-ID: <1561236905-8901-4-git-send-email-pgaj@cadence.com> (raw)
In-Reply-To: <1561236905-8901-1-git-send-email-pgaj@cadence.com>

I need to export this function to let secondary master update the bus mode.
Some newly added I2C devices may operate in slower mode.

Signed-off-by: Przemyslaw Gaj <pgaj@cadence.com>
---
 drivers/i3c/master.c       | 10 ++++++++++
 include/linux/i3c/master.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 759078f..cbace14 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -566,6 +566,15 @@ static const struct device_type i3c_masterdev_type = {
 	.groups	= i3c_masterdev_groups,
 };
 
+/**
+ * i3c_bus_set_mode() - set a bus mode
+ * @i3cbus: I3C bus object
+ * @mode: new bus mode
+ *
+ * This is called at initialization time and should be called when
+ * bus mode has changed, for example when secondary master registered
+ * devices after successful masership takeover.
+ */
 int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode)
 {
 	i3cbus->mode = mode;
@@ -590,6 +599,7 @@ int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(i3c_bus_set_mode);
 
 static struct i3c_master_controller *
 i2c_adapter_to_i3c_master(struct i2c_adapter *adap)
diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h
index df3d769..e089771 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -538,6 +538,7 @@ void i3c_master_cleanup(struct i3c_master_controller *master);
 int i3c_master_register(struct i3c_master_controller *master,
 			struct i3c_device_info *info);
 int i3c_master_unregister(struct i3c_master_controller *master);
+int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode);
 
 /**
  * i3c_dev_get_master_data() - get master private data attached to an I3C
-- 
2.4.5


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  parent reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-22 20:54 [PATCH v5 0/7] Add the I3C mastership request Przemyslaw Gaj
2019-06-22 20:54 ` [PATCH v5 1/7] i3c: add addr and lvr to i2c_dev_desc structure Przemyslaw Gaj
2019-06-22 20:55 ` [PATCH v5 2/7] i3c: split i3c_master_register into init - register pair Przemyslaw Gaj
2019-07-06  8:48   ` Boris Brezillon
2019-06-22 20:55 ` Przemyslaw Gaj [this message]
2019-07-06  7:39   ` [PATCH v5 3/7] i3c: export i3c_bus_set_mode function Boris Brezillon
2019-06-22 20:55 ` [PATCH v5 4/7] i3c: Add support for mastership request to I3C subsystem Przemyslaw Gaj
2019-07-06  9:00   ` Boris Brezillon
2019-07-10 18:04   ` Vitor Soares
2019-07-11  5:28     ` Przemyslaw Gaj
2019-07-11 10:11       ` Vitor Soares
2019-07-12 10:10         ` Przemyslaw Gaj
2019-07-12 11:28           ` Vitor Soares
2019-08-11 10:17             ` Boris Brezillon
2019-08-12 13:55               ` Vitor Soares
2019-08-12 14:55                 ` Boris Brezillon
2019-08-22 11:08                   ` Vitor Soares
2019-06-22 20:55 ` [PATCH v5 5/7] i3c: master: cdns: add support for mastership request to Cadence I3C master driver Przemyslaw Gaj
2019-06-22 20:55 ` [PATCH v5 6/7] i3c: master: Add module author Przemyslaw Gaj
2019-06-22 20:55 ` [PATCH v5 7/7] MAINTAINERS: add myself as co-maintainer of i3c subsystem Przemyslaw Gaj

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