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

Benoit Cousson b-cousson at ti.com
Fri Jul 1 16:54:02 EDT 2011

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

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);
+	}
 	 * If an IP contains only one HW reset line, then assert it

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