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97ddb1c88b
This converts the mcp23s08 driver to be able to be used with device tree. There is a "spi-present-mask" device tree property, that allows to use multiple of this spi chips on the same chipselect. v4: - removed the ability to specify the pullup from device tree - updated binding doc v3: - removed mcp,chips device tree property in favour of a mcp,spi-present-mask and a flag for the pullup of every gpio - seperated the match table. Now there is one for i2c and one for spi - do the of reading stuff on stack of the probe function - no devm any more v2: - squashed booth patches together - fixed build warning, when CONFIG_OF is not defined - use of_match_ptr macro for of_match_table Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>