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ARM: OMAP2+ hwmod: Allow modules to disable HW_AUTO

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Introduce HWMOD_CLKDM_NOAUTO flag that allows the hwmod's
clockdomain to be prevented from HW_AUTO while the hwmod is active.

This is needed to workaround some modules which don't function
correctly with HW_AUTO. e.g. DCAN on DRA7.

Signed-off-by: Roger Quadros <rogerq@ti.com>
[nsekhar@ti.com: rebased to v4.9 kernel]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Roger Quadros 2017-03-17 10:58:18 +02:00 • committed by Tony Lindgren
parent 390c06828d
commit 8ff42da411
2 changed files with 12 additions and 2 deletions
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9
arch/arm/mach-omap2/omap_hwmod.c
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@ -2027,7 +2027,7 @@ static int _enable(struct omap_hwmod *oh)
r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) :
-EINVAL;
if (oh->clkdm)
if (oh->clkdm && !(oh->flags & HWMOD_CLKDM_NOAUTO))
clkdm_allow_idle(oh->clkdm);
if (!r) {
@ -2084,7 +2084,12 @@ static int _idle(struct omap_hwmod *oh)
_idle_sysc(oh);
_del_initiator_dep(oh, mpu_oh);
if (oh->clkdm)
/*
* If HWMOD_CLKDM_NOAUTO is set then we don't
* deny idle the clkdm again since idle was already denied
* in _enable()
*/
if (oh->clkdm && !(oh->flags & HWMOD_CLKDM_NOAUTO))
clkdm_deny_idle(oh->clkdm);
if (oh->flags & HWMOD_BLOCK_WFI)