gpio: grgpio: Do not use gc->pin2mask()
The pin2mask() accessor only shuffles BIT ORDER in big endian systems, i.e. the bitstuffing is swizzled big endian so "bit 0" is bit 7 or bit 15 or bit 31 or so. The grgpio only uses big endian BYTE ORDER which will be taken car of by the ->write_reg() callback. Just use BIT(offset) to assign the bit. Acked-by: NAndreas Larsson <andreas@gaisler.com> Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
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