From: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Date: Sat, 22 May 2010 11:45:01 +0000 (-0400)
Subject: Device Driver Model.
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Fkernel%2Fslides%2F.git;a=commitdiff_plain;h=7ad2b067cd84e568d67a49bd7055e1561095a0cb

Device Driver Model.
---

diff --git a/12dd/dd b/12dd/dd
new file mode 100644
index 0000000..fcc69f5
--- /dev/null
+++ b/12dd/dd
@@ -0,0 +1,50 @@
+%Device Driver Model
+%Thadeu Cascardo
+
+# Linux 2.6 Device Driver Model
+
+* Design and Implementation by GregKH
+* kobjects
+* sysfs
+
+# Buses
+
+* A way to communicate with device
+* Interface between Linux and hardware
+* May allow hotplug of devices
+* Examples:
+	- USB
+	- PCI
+	- I2C
+	- SPI
+	- ACPI
+	- Platform
+* /sys/bus/
+
+# Classes
+
+* A view of the device
+* Interface between Linux and user space software
+* The interface may use character devices and/or sysfs or other interfaces
+* Specific interface classes:
+	- block devices
+	- network devices
+* Other classes:
+	- tty
+	- video4linux
+	- input
+	- backlight
+	- rtc
+* /sys/class/
+
+# Drivers
+
+* Implement the communication with the hardware, usually through a bus
+* Present a view of the device, communicating with user space
+* Basically, links the bus and the class for a given device model (or a family)
+
+# Device
+
+* An object representing a device in the bus or a class device
+* Establishes an hierarchy through the parent link
+* A class device usually has a device in the bus as its parent