OMAP2+: hwmod: Enable module in shutdown to access sysconfig

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>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 384d3c3..cbc2a8a 100644 (file)
--- 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