regulator: ad5398: Fix return value of ad5398_write_reg
i2c_master_send() returns the number of bytes written on success. So current code returns 2 if ad5398_write_reg() success. This return value is propagated to .set_current_limit, .enable and .disable callbacks of regulator_ops. This can be a problem, for example, if the users test if the return value of regulator_set_current_limit() is 0. Fix it by making ad5398_write_reg() return 0 on success. Signed-off-by: NAxel Lin <axel.lin@ingics.com> Acked-by: NMichael Hennerich <michael.hennerich@analog.com> Signed-off-by: NMark Brown <broonie@kernel.org>
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