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Kconfig: Add I2C_DEVICES device group

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Currently there is no way for a board model's Kconfig stanza to
say "I have an i2c bus which the user can plug an i2c device into,
build all the free-standing i2c devices". The Kconfig mechanism
for this is the "device group". Add an I2C_DEVICES group along
the same lines as the existing PCI_DEVICES. Simple free-standing
i2c devices which a user might plausibly want to be able to
plug in on the QEMU commandline should have
   default y if I2C_DEVICES
and board models which have an i2c bus that is user-accessible
should use
   imply I2C_DEVICES
to cause those pluggable devices to be built.

In this commit we mark only a fairly conservative set of i2c devices
as belonging to the I2C_DEVICES group: the simple sensors and RTCs
(not including PMBus devices or devices which need GPIO lines to be
connected).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Hao Wu <wuhaotsh@google.com>
Message-id: 20220208155911.3408455-2-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2022-02-08 15:59:10 +00:00
parent 92d6528dbb
commit b5bf5a53d1
4 changed files with 18 additions and 2 deletions
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2
hw/rtc/Kconfig
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@ -1,10 +1,12 @@
config DS1338
bool
depends on I2C
default y if I2C_DEVICES
config M41T80
bool
depends on I2C
default y if I2C_DEVICES
config M48T59
bool