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authorLee Jones <lee.jones@linaro.org>2012-02-06 11:22:22 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-02-10 11:42:25 -0800
commit74d1d82cdaaec727f5072eb1c9f49b7e920e076f (patch)
treea1bee0010203df0465df33fb337ae66bb6b59fee /include/linux/sys_soc.h
parent956563362be8ac7ce084b00825168be1adfb29ee (diff)
downloadop-kernel-dev-74d1d82cdaaec727f5072eb1c9f49b7e920e076f.zip
op-kernel-dev-74d1d82cdaaec727f5072eb1c9f49b7e920e076f.tar.gz
drivers/base: add bus for System-on-Chip devices
Traditionally, any System-on-Chip based platform creates a flat list of platform_devices directly under /sys/devices/platform. In order to give these some better structure, this introduces a new bus type for soc_devices that are registered with the new soc_device_register() function. All devices that are on the same chip should then be registered as child devices of the soc device. The soc bus also exports a few standardised device attributes which allow user space to query the specific type of soc. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/sys_soc.h')
-rw-r--r--include/linux/sys_soc.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/sys_soc.h b/include/linux/sys_soc.h
new file mode 100644
index 0000000..2739ccb
--- /dev/null
+++ b/include/linux/sys_soc.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+#ifndef __SOC_BUS_H
+#define __SOC_BUS_H
+
+#include <linux/device.h>
+
+struct soc_device_attribute {
+ const char *machine;
+ const char *family;
+ const char *revision;
+ const char *soc_id;
+};
+
+/**
+ * soc_device_register - register SoC as a device
+ * @soc_plat_dev_attr: Attributes passed from platform to be attributed to a SoC
+ */
+struct soc_device *soc_device_register(
+ struct soc_device_attribute *soc_plat_dev_attr);
+
+/**
+ * soc_device_unregister - unregister SoC device
+ * @dev: SoC device to be unregistered
+ */
+void soc_device_unregister(struct soc_device *soc_dev);
+
+/**
+ * soc_device_to_device - helper function to fetch struct device
+ * @soc: Previously registered SoC device container
+ */
+struct device *soc_device_to_device(struct soc_device *soc);
+
+#endif /* __SOC_BUS_H */
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