Messages in this thread | | | From | Heiko Stuebner <> | Subject | Re: [PATCH] pinctrl: rockchip: enable clock when reading pin direction register | Date | Tue, 12 Dec 2017 19:19:19 +0100 |
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Hi Brian,
Am Dienstag, 12. Dezember 2017, 09:43:43 CET schrieb Brian Norris: > We generally leave the GPIO clock disabled, unless an interrupt is > requested or we're accessing IO registers. We forgot to do this for the > ->get_direction() callback, which means we can sometimes [1] get > incorrect results [2] from, e.g., /sys/kernel/debug/gpio. > > Enable the clock, so we get the right results! > > [1] Sometimes, because many systems have 1 or mor interrupt requested on > each GPIO bank, so they always leave their clock on. > > [2] Incorrect, meaning the register returns 0, and so we interpret that > as "input". > > Signed-off-by: Brian Norris <briannorris@chromium.org>
thanks for catching this and it looks good to me, so Reviewed-by: Heiko Stuebner <heiko@sntech.de>
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