Basic PWM driver for AVR32 and AT91

PWM device setup, and a simple PWM driver exposing a programming interface
giving access to each channel's full capabilities.  Note that this doesn't
support starting several channels in synch.

[hskinnemoen@atmel.com: allocate platform device dynamically]
[hskinnemoen@atmel.com: Kconfig fix]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 7b5220ca7d7f..1941587a7aa2 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -13,6 +13,15 @@ menuconfig MISC_DEVICES
 
 if MISC_DEVICES
 
+config ATMEL_PWM
+        tristate "Atmel AT32/AT91 PWM support"
+        depends on AVR32 || ARCH_AT91
+        help
+          This option enables device driver support for the PWM channels
+          on certain Atmel prcoessors.  Pulse Width Modulation is used for
+          purposes including software controlled power-efficent backlights
+          on LCD displays, motor control, and waveform generation.
+
 config IBM_ASM
         tristate "Device driver for IBM RSA service processor"
         depends on X86 && PCI && INPUT && EXPERIMENTAL