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ARM: OMAP2+: hwmod: Introduce ti,no-idle dt property

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Introduce a dt property, ti,no-idle, that prevents an IP to idle at any
point. This is to handle Errata i877, which tells that GMAC clocks
cannot be disabled.

Acked-by: Roger Quadros <rogerq@ti.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Lokesh Vutla
2016-03-07 01:41:21 -07:00
committed by Paul Walmsley
parent 92e963f50f
commit 2e18f5a1bc
3 changed files with 12 additions and 1 deletions
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9
arch/arm/mach-omap2/omap_hwmod.c
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@@ -2200,6 +2200,11 @@ static int _enable(struct omap_hwmod *oh)
*/
static int _idle(struct omap_hwmod *oh)
{
if (oh->flags & HWMOD_NO_IDLE) {
oh->_int_flags |= _HWMOD_SKIP_ENABLE;
return 0;
}
pr_debug("omap_hwmod: %s: idling\n", oh->name);
if (oh->_state != _HWMOD_STATE_ENABLED) {
@@ -2504,6 +2509,8 @@ static int __init _init(struct omap_hwmod *oh, void *data)
oh->flags |= HWMOD_INIT_NO_RESET;
if (of_find_property(np, "ti,no-idle-on-init", NULL))
oh->flags |= HWMOD_INIT_NO_IDLE;
if (of_find_property(np, "ti,no-idle", NULL))
oh->flags |= HWMOD_NO_IDLE;
}
oh->_state = _HWMOD_STATE_INITIALIZED;
@@ -2630,7 +2637,7 @@ static void __init _setup_postsetup(struct omap_hwmod *oh)
* XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data -
* it should be set by the core code as a runtime flag during startup
*/
if ((oh->flags & HWMOD_INIT_NO_IDLE) &&
if ((oh->flags & (HWMOD_INIT_NO_IDLE | HWMOD_NO_IDLE)) &&
(postsetup_state == _HWMOD_STATE_IDLE)) {
oh->_int_flags |= _HWMOD_SKIP_ENABLE;
postsetup_state = _HWMOD_STATE_ENABLED;