arm/tegra: Use bus notifiers to trigger pinmux setup

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Currently, the Tegra pinmux is initialized at different times when booting
with and without device tree:

Without device tree:

1) Pinmux and GPIO drivers are registered.
2) Pinmux is configured.
3) All other drivers are registered.

With device tree:

1) All drivers are registered and probed, including pinmux and GPIO.
2) Pinmux is configured.

This change modifies board-pinmux.c to detect pinmux and GPIO driver
registration using bus notifiers. This allows pinmux configuration to
happen immediately after the pinmux driver is probed, irrespective of
whether the pinmux driver is manually registered by board-pinmux.c, or
if it's instantiated during device tree parsing.

To support this with device tree, the pinmux init functions must be
called prior to instantiating devices from device tree, so that the
notifiers are set up before-hand.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

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This commit is contained in:

Stephen Warren 2011-12-16 15:12:32 -07:00 • committed by Olof Johansson

parent 54862bf009

commit a58116f331

2 changed files with 69 additions and 17 deletions

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14

arch/arm/mach-tegra/board-dt.c

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74

arch/arm/mach-tegra/board-pinmux.c

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