From 8480c2e7b0484b8ec741bbb908455fce748f9798 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 27 May 2015 14:11:54 +0100 Subject: [PATCH] pinctrl: tegra-xusb: Fix allocation of pins Commit e5b3b2d9ed20 ("pinctrl: allows not to define the get_group_pins operation") allows pin controllers not to register the get_group_pins() function. However, a side-effect of not registering this function is that pins are not allocated and potentially multiple devices could attempt to configure the same pins [1]. Although this problem exists in the pinctrl core, because only a few devices are impacted by this, fix this for tegra-xusb by adding the get_group_pins() function. Please note that in addition to adding the get_group_pins() functions the pins/lanes for the tegra-xusb also need to be registered when calling pinctrl_register(). This also allows the current pinmux state to be viewed by the debugfs node "pinmux-pins" for the tegra-xusb pad controller. [1] http://www.spinics.net/lists/linux-gpio/msg05810.html Signed-off-by: Jon Hunter Acked-by: Thierry Reding Signed-off-by: Linus Walleij --- Reading git-format-patch failed