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[v2,3/8] OMAP2+: hwmod: Enable module in shutdown to access sysconfig

Message ID 1309553647-14624-4-git-send-email-b-cousson@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Benoit Cousson July 1, 2011, 8:54 p.m. UTC 
From: Miguel Vadillo <vadillo@ti.com>

When calling the shutdown, the module may be already in idle.
Accessing the sysconfig register will then lead to a crash.
In that case, re-enable the module in order to allow the access
to the sysconfig register.

Signed-off-by: Miguel Vadillo <vadillo@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/omap_hwmod.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
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Patch

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 384d3c3..cbc2a8a 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1396,8 +1396,11 @@  static int _shutdown(struct omap_hwmod *oh)
 		}
 	}
 
-	if (oh->class->sysc)
+	if (oh->class->sysc) {
+		if (oh->_state == _HWMOD_STATE_IDLE)
+			_enable(oh);
 		_shutdown_sysc(oh);
+	}
 
 	/*
 	 * If an IP contains only one HW reset line, then assert it