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authorAlan Cox <alan@linux.intel.com>2011-09-07 16:06:51 +0300
committerSamuel Ortiz <sameo@linux.intel.com>2011-10-24 14:09:15 +0200
commit42c2544b2d7d4f287bfa239455af09b6408476e2 (patch)
tree95cecad4ffcaa206434aea36ed746f84e48ec4e6 /arch/x86/platform/mrst
parent1f5a371c075a7101fe75a75cde5aad928460a42e (diff)
x86, mrst: Some drivers need to known when an SCU is available
Add a notifier so that drivers can hook into SCU availability in order to take actions post initialisation when/if the SCU becomes available. In the ideal world we wouldn't need this and we could avoid any init dependancies of this form, but in practice we can't do it for some cases. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'arch/x86/platform/mrst')
-rw-r--r--arch/x86/platform/mrst/mrst.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index fe73276e026..51ec016c20d 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -24,6 +24,7 @@
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/module.h>
+#include <linux/notifier.h>
#include <asm/setup.h>
#include <asm/mpspec_def.h>
@@ -555,6 +556,9 @@ static void __init intel_scu_i2c_device_register(int bus,
i2c_devs[i2c_next_dev++] = new_dev;
}
+BLOCKING_NOTIFIER_HEAD(intel_scu_notifier);
+EXPORT_SYMBOL_GPL(intel_scu_notifier);
+
/* Called by IPC driver */
void intel_scu_devices_create(void)
{
@@ -579,6 +583,7 @@ void intel_scu_devices_create(void)
} else
i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1);
}
+ intel_scu_notifier_post(SCU_AVAILABLE, 0L);
}
EXPORT_SYMBOL_GPL(intel_scu_devices_create);
@@ -587,6 +592,8 @@ void intel_scu_devices_destroy(void)
{
int i;
+ intel_scu_notifier_post(SCU_DOWN, 0L);
+
for (i = 0; i < ipc_next_dev; i++)
platform_device_del(ipc_devs[i]);
}