• Santosh Shilimkar's avatar
    ARM: OMAP4+: CPUidle: Deprecate use of omap4_mpuss_read_prev_context_state() · e7457253
    Santosh Shilimkar authored
    
    
    Current OMAP4 CPUIdle driver is using omap4_mpuss_read_prev_context_state()
    to check whether the MPU cluster lost context or not before calling
    cpu_cluster_pm_exit().  This was initially done an optimization for
    corner cases, where if the cluster low power entry fails for some
    reason, the cluster context restore gets skipped.  However, since
    reading the previous context is expensive (involving slow accesses to
    the PRCM), it's better to avoid it and simply check the target cluster
    state instead.
    
    Moving forward, OMAP CPUidle drivers needs to be moved to drivers/idle/*
    once the PRM/CM code gets moved to drivers. This patch also reduces one
    dependency with platform code for idle driver movement.
    Acked-by: default avatarNishanth Menon <nm@ti.com>
    Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
    [khilman@linaro.org: minor changelog edits]
    Signed-off-by: default avatarKevin Hilman <khilman@linaro.org>
    e7457253
omap-mpuss-lowpower.c 9.72 KB