The patch titled
x86, mrst: some drivers need to known when an SCU is available
has been added to the -mm tree. Its filename is
x86-mrst-some-drivers-need-to-known-when-an-scu-is-available.patch
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------------------------------------------------------
Subject: x86, mrst: some drivers need to known when an SCU is available
From: Alan Cox <alan@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Cc: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
Cc: Feng Tang <feng.tang@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/intel_scu_ipc.h | 24 +++++++++++++++++++++++-
arch/x86/platform/mrst/mrst.c | 7 +++++++
2 files changed, 30 insertions(+), 1 deletion(-)
diff -puN arch/x86/include/asm/intel_scu_ipc.h~x86-mrst-some-drivers-need-to-known-when-an-scu-is-available arch/x86/include/asm/intel_scu_ipc.h
--- a/arch/x86/include/asm/intel_scu_ipc.h~x86-mrst-some-drivers-need-to-known-when-an-scu-is-available
+++ a/arch/x86/include/asm/intel_scu_ipc.h
@@ -1,7 +1,9 @@
#ifndef _ASM_X86_INTEL_SCU_IPC_H_
#define _ASM_X86_INTEL_SCU_IPC_H_
-#define IPCMSG_VRTC 0xFA /* Set vRTC device */
+#include <linux/notifier.h>
+
+#define IPCMSG_VRTC 0xFA /* Set vRTC device */
/* Command id associated with message IPCMSG_VRTC */
#define IPC_CMD_VRTC_SETTIME 1 /* Set time */
@@ -44,4 +46,24 @@ int intel_scu_ipc_i2c_cntrl(u32 addr, u3
/* Update FW version */
int intel_scu_ipc_fw_update(u8 *buffer, u32 length);
+extern struct blocking_notifier_head intel_scu_notifier;
+
+static inline void intel_scu_notifier_add(struct notifier_block *nb)
+{
+ blocking_notifier_chain_register(&intel_scu_notifier, nb);
+}
+
+static inline void intel_scu_notifier_remove(struct notifier_block *nb)
+{
+ blocking_notifier_chain_unregister(&intel_scu_notifier, nb);
+}
+
+static inline int intel_scu_notifier_post(unsigned long v, void *p)
+{
+ return blocking_notifier_call_chain(&intel_scu_notifier, v, p);
+}
+
+#define SCU_AVAILABLE 1
+#define SCU_DOWN 2
+
#endif
diff -puN arch/x86/platform/mrst/mrst.c~x86-mrst-some-drivers-need-to-known-when-an-scu-is-available arch/x86/platform/mrst/mrst.c
--- a/arch/x86/platform/mrst/mrst.c~x86-mrst-some-drivers-need-to-known-when-an-scu-is-available
+++ a/arch/x86/platform/mrst/mrst.c
@@ -26,6 +26,7 @@
#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>
@@ -558,6 +559,9 @@ static void __init intel_scu_i2c_device_
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)
{
@@ -582,6 +586,7 @@ 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);
@@ -590,6 +595,8 @@ 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]);
}
_
Patches currently in -mm which might be from alan@xxxxxxxxxxxxxxx are
linux-next.patch
vrtc-change-its-year-offset-from-1960-to-1972.patch
x86-rtc-dont-register-a-platform-rtc-device-for-intel-mid-platforms.patch
x86-mrst-some-drivers-need-to-known-when-an-scu-is-available.patch
mrst-battery-fixes.patch
x86mrst-add-mapping-for-bma023.patch
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