[PATCH v3] ARM: OMAP2+: hwmod: Add a new state to handle hwmods left enabled at init
khilman at ti.com
Mon Nov 21 18:38:09 UTC 2011
Rajendra Nayak <rnayak at ti.com> writes:
> An hwmod with a 'HWMOD_INIT_NO_IDLE' flag set, is left in
> enabled state by the hwmod framework post the initial setup.
> Once a real user of the device (a driver) tries to enable it
> at a later point, the hwmod framework throws a WARN() about
> the device being already in enabled state.
> Fix this by introducing a new state '_HWMOD_STATE_ENABLED_AT_INIT'
> to identify such devices/hwmods. When the device/hwmod
> is requested to be enabled (the first time) by its driver/user,
> nothing except the mux-enable and a state change to '_HWMOD_STATE_ENABLED'
> is needed. The mux data is board specific and is unavailable during
> initial enable() of the device, done by the framework as part of
> A good example of a such a device is an UART used as debug console.
> The UART module needs to be kept enabled through the boot, until the
> UART driver takes control of it, for debug prints to appear on
> the console.
> Acked-by: Kevin Hilman <khilman at ti.com>
> Acked-by: Benoit Cousson <b-cousson at ti.com>
Looks like we need a
Tested-by: Govindraj Raja <govindraj.raja at ti.com>
here as well. Thanks Govindraj for testing.
> Signed-off-by: Rajendra Nayak <rnayak at ti.com>
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