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| H A D | axp221.c | 3c781190d11ca44752562867d76ccfb8d0a45ac3 Sun Jan 11 18:43:56 UTC 2015 Hans de Goede <hdegoede@redhat.com> sunxi: axp221: Protect axp221_init against multiple calls
The voltage setting code knows it needs to call axp221_init before calling
the various voltage setting functions.
But users of axp utility functions like axp221_get_sid() do not know this,
so the utility functions always call axp221_init() to ensure that the
p2wi / rsb setup magic has been done.
Since doing this repeatedly is quite expensive, add a check to axp221_init
so that it only does the initialization once.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
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