Patch "ARM: OMAP2+: hwmod: Introduce ti,no-idle dt property" has been added to the 4.4-stable tree
Subsystems (6)
This is a note to let you know that I've just added the patch titled
ARM: OMAP2+: hwmod: Introduce ti,no-idle dt property
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-omap2-hwmod-introduce-ti-no-idle-dt-property.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.
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From
2e18f5a1bc18e8af7031b3b26efde25307014837Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <[email protected]>
Date: Mon, 7 Mar 2016 01:41:21 -0700
Subject: ARM: OMAP2+: hwmod: Introduce ti,no-idle dt property
From: Lokesh Vutla <[email protected]>
commit 2e18f5a1bc18e8af7031b3b26efde25307014837 upstream.
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.
--- Documentation/devicetree/bindings/arm/omap/omap.txt | 1 + arch/arm/mach-omap2/omap_hwmod.c | 9 ++++++++- arch/arm/mach-omap2/omap_hwmod.h | 3 +++ 3 files changed, 12 insertions(+), 1 deletion(-)
Documentation/devicetree/bindings/arm/omap/omap.txt +1 -0
@@ -23,6 +23,7 @@ Optional properties: during suspend. - ti,no-reset-on-init: When present, the module should not be reset at init - ti,no-idle-on-init: When present, the module should not be idled at init +- ti,no-idle: When present, the module is never allowed to idle. Example:
arch/arm/mach-omap2/omap_hwmod.c +8 -1
@@ -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_hwmo 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(stru* 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;
arch/arm/mach-omap2/omap_hwmod.h +3 -0
@@ -525,6 +525,8 @@ struct omap_hwmod_omap4_prcm {* or idled. * HWMOD_OPT_CLKS_NEEDED: The optional clocks are needed for the module to * operate and they need to be handled at the same time as the main_clk. +* HWMOD_NO_IDLE: Do not idle the hwmod at all. Useful to handle certain +* IPs like CPSW on DRA7, where clocks to this module cannot be disabled. */ #define HWMOD_SWSUP_SIDLE (1 << 0)#define HWMOD_SWSUP_MSTANDBY (1 << 1)
@@ -541,6 +543,7 @@ struct omap_hwmod_omap4_prcm {#define HWMOD_SWSUP_SIDLE_ACT (1 << 12)#define HWMOD_RECONFIG_IO_CHAIN (1 << 13)#define HWMOD_OPT_CLKS_NEEDED (1 << 14) +#define HWMOD_NO_IDLE (1 << 15)/* * omap_hwmod._int_flags definitions
Patches currently in stable-queue which might be from [email protected] are
queue-4.4/arm-omap2-hwmod-introduce-ti-no-idle-dt-property.patch queue-4.4/arm-dts-dra7-do-not-gate-cpsw-clock-due-to-errata-i877.patch
Paul Walmsley
maintainerHello Greg KH and the -stable maintainers,
Quoted 6 lines · On Fri, 11 Mar 2016, [email protected] wrote:
This is a note to let you know that I've just added the patch titled
ARM: OMAP2+: hwmod: Introduce ti,no-idle dt property
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
Thanks - please note that to avoid the chip-damaging errata i877, the subsequent patch should also be merged into -stable:
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Patches currently in stable-queue which might be from [email protected] are
[ ... ]
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queue-4.4/arm-dts-dra7-do-not-gate-cpsw-clock-due-to-errata-i877.patch
regards,
- Paul