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| author | Rajendra Nayak <rnayak@ti.com> | 2013-07-29 05:01:50 (GMT) |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2013-07-30 11:13:36 (GMT) |
| commit | f66e329d889fce165074f677509d449fc92ff7b9 (patch) | |
| tree | 4f491601aee180af3f8dec87bdf49393038ca1a3 | |
| parent | 7dedd346941d317b6b313de4746ad0354006e68b (diff) | |
| download | linux-fsl-qoriq-f66e329d889fce165074f677509d449fc92ff7b9.tar.xz | |
ARM: OMAP2+: Avoid idling memory controllers with no drivers
Memory controllers in OMAP (like GPMC and EMIF) have the hwmods marked with
HWMOD_INIT_NO_IDLE and are left in enabled state post initial setup.
Even if they have drivers missing, avoid idling them as part of
omap_device_late_idle()
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Tested-by: Mark Jackson <mpfj-list@newflow.co.uk>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
| -rw-r--r-- | arch/arm/mach-omap2/omap_device.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index 5cc9287..1c82cde 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -842,6 +842,7 @@ static int __init omap_device_late_idle(struct device *dev, void *data) { struct platform_device *pdev = to_platform_device(dev); struct omap_device *od = to_omap_device(pdev); + int i; if (!od) return 0; @@ -850,6 +851,15 @@ static int __init omap_device_late_idle(struct device *dev, void *data) * If omap_device state is enabled, but has no driver bound, * idle it. */ + + /* + * Some devices (like memory controllers) are always kept + * enabled, and should not be idled even with no drivers. + */ + for (i = 0; i < od->hwmods_cnt; i++) + if (od->hwmods[i]->flags & HWMOD_INIT_NO_IDLE) + return 0; + if (od->_driver_status != BUS_NOTIFY_BOUND_DRIVER) { if (od->_state == OMAP_DEVICE_STATE_ENABLED) { dev_warn(dev, "%s: enabled but no driver. Idling\n", |