This patch modifies Tegra's device tree support to remove the dependency on harmony_pinmux_init(), thus making it completely board-independent. Some notes: * This series is built on top of linux-next with a bunch of patches applied, in particular the removal of irq_to_gpio and custom gpio_to_irq that I'm in the process of sending to Russell. I haven't yet thought through how/where to merge this without causing all kinds of conflicts. * I took care to preserve bisectability of Tegra DT support. However, linux-next doesn't yet have entirely useful Tegra DT support; some stuff from Grant's devicetree/next hasn't been pushed into linux-next yet. If we don't care about bisectability, I can remove a couple commits and possibly squash some others. * The approach taken here is to have a custom semantic SoC-specific binding for each the gpio and pinmux drivers. Other alternatives suggested included: 1) A generic "list of register writes" to be performed at boot. This has the advantage of reusability across different SoCs. However, this approach isn't semantic, and requires detailed knowledge of pinmux registers and potentially fiddly calculations when constructing the device tree. 2) The ability to define disabled child nodes of the pinmux controller that are not processed by tegra_pinmux_probe_dt(). Other devices may refer to those using phandles, and later enable/disable them, thus representing dynamic pinmuxing in the device tree. I wasn't convinced whether we should represent dynamic pinmuxing using phandles. I discussed in more detail why I prefer the current proposal in various email threads. * tegra_pinmux_probe_dt() enumerates all legal pingroup names, and searches for a pinmux controller subnode of that name, then processes each one that is found. An alternative that some may prefer would be to enumerate each child node of the pinmux controller, and have each node contain an explicit pingroup name property instead. Does anyone have any preference here? I suppose the latter option would obviate the need to add of_find_child_node_by_name(). Thanks for reading! Stephen Warren (12): dt: Add of_find_child_node_by_name() arm/tegra: Prep boards for gpio/pinmux conversion to pdevs arm/tegra: Avoid duplicate gpio/pinmux devices with dt arm/tegra: board-dt: Add AUXDATA for tegra-gpio and tegra-pinmux arm/dt: Tegra: Add nvidia,gpios property to GPIO controller arm/dt: Tegra: Add pinmux node gpio/tegra: Convert to a platform device gpio/tegra: Add device tree support arm/tegra: Convert pinmux driver to a platform device arm/tegra: Add device tree support to pinmux driver arm/tegra: board-dt: Remove dependency on non-dt pinmux functions arm/tegra: Remove temporary gpio/pinmux registration workaround arch/arm/boot/dts/tegra-harmony.dts | 479 ++++++++++++++++++++++++++ arch/arm/boot/dts/tegra-seaboard.dts | 409 ++++++++++++++++++++++ arch/arm/boot/dts/tegra20.dtsi | 5 + arch/arm/mach-tegra/Makefile | 1 - arch/arm/mach-tegra/board-dt.c | 12 +- arch/arm/mach-tegra/board-harmony-pinmux.c | 8 + arch/arm/mach-tegra/board-paz00-pinmux.c | 8 + arch/arm/mach-tegra/board-seaboard-pinmux.c | 9 +- arch/arm/mach-tegra/board-trimslice-pinmux.c | 7 + arch/arm/mach-tegra/devices.c | 10 + arch/arm/mach-tegra/devices.h | 2 + arch/arm/mach-tegra/pinmux.c | 136 ++++++++ drivers/gpio/gpio-tegra.c | 56 +++- drivers/of/base.c | 18 + include/linux/of.h | 2 + 15 files changed, 1138 insertions(+), 24 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html