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checks: add gpio binding properties check

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The GPIO binding is different compared to other phandle plus args
properties in that the property name has a variable, optional prefix.
The format of the property name is [<name>-]gpio{s} where <name> can
be any legal property string. Therefore, custom matching of property
names is needed, but the common check_property_phandle_args() function
can still be used.

It's possible that there are property names matching which are not GPIO
binding specifiers. There's only been one case found in testing which is
"[<vendor>,]nr-gpio{s}". This property has been blacklisted and the same
should be done to any others we find. This check will prevent getting
any more of these, too.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Rob Herring
2017-09-01 13:53:02 -05:00
committed by David Gibson
parent b3bbac02d5
commit c1e7738988
3 changed files with 88 additions and 0 deletions
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2
tests/run_tests.sh
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@@ -551,6 +551,8 @@ dtc_tests () {
check_tests unit-addr-leading-0x.dts unit_address_format
check_tests unit-addr-leading-0s.dts unit_address_format
check_tests bad-phandle-cells.dts interrupts_extended_property
check_tests bad-gpio.dts gpios_property
run_sh_test dtc-checkfails.sh deprecated_gpio_property -- -Wdeprecated_gpio_property -I dts -O dtb bad-gpio.dts
run_sh_test dtc-checkfails.sh node_name_chars -- -I dtb -O dtb bad_node_char.dtb
run_sh_test dtc-checkfails.sh node_name_format -- -I dtb -O dtb bad_node_format.dtb
run_sh_test dtc-checkfails.sh prop_name_chars -- -I dtb -O dtb bad_prop_char.dtb