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i2c: convert SMBus alert setup function to return an ERRPTR

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Only few drivers use this call, so drivers and I2C core are converted at
once with this patch. By simply using i2c_new_client_device() instead of
i2c_new_device(), we easily can return an ERRPTR for this function as
well. To make out of tree users aware that something changed, the
function is renamed to i2c_new_smbus_alert_device().

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang
2020-02-28 18:12:20 +01:00
committed by Wolfram Sang
parent 0f82056407
commit ed68052226
7 changed files with 35 additions and 27 deletions
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2
Documentation/i2c/smbus-protocol.rst
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@@ -274,7 +274,7 @@ to know which slave triggered the interrupt.
This is implemented the following way in the Linux kernel:
* I2C bus drivers which support SMBus alert should call
i2c_setup_smbus_alert() to setup SMBus alert support.
i2c_new_smbus_alert_device() to install SMBus alert support.
* I2C drivers for devices which can trigger SMBus alerts should implement
the optional alert() callback.