atmel_tc library

Create <linux/atmel_tc.h> based on <asm-arm/arch-at91/at91-tc.h> and the
at91sam9263 and at32ap7000 datasheets.  Most AT91 and AT32 SOCs have one
or two of these TC blocks, which include three 16-bit timers that can be
interconnected in various ways.

These TC blocks can be used for external interfacing (such as PWM and
measurement), or used as somewhat quirky sixteen-bit timers.

Changes relative to the original version:
  * Drop unneeded inclusion of <linux/mutex.h>
  * Support an arbitrary number of TC blocks
  * Return a struct with information about a TC block from
    atmel_tc_alloc() instead of using a combination of return values
    and "out" parameters.
  * ioremap() the I/O registers on allocation
  * Look up clocks and irqs for all channels
  * Add "name" parameter to atmel_tc_alloc() and use this when
    requesting the iomem resource.
  * Check if the platform provided the necessary resources at probe()
    time instead of when the TCB is allocated.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 982e27b86d10..b3ba68170b81 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -22,6 +22,14 @@ config ATMEL_PWM
           purposes including software controlled power-efficent backlights
           on LCD displays, motor control, and waveform generation.
 
+config ATMEL_TCLIB
+        bool "Atmel AT32/AT91 Timer/Counter Library"
+        depends on (AVR32 || ARCH_AT91)
+        help
+          Select this if you want a library to allocate the Timer/Counter
+          blocks found on many Atmel processors.  This facilitates using
+          these blocks by different drivers despite processor differences.
+
 config IBM_ASM
         tristate "Device driver for IBM RSA service processor"
         depends on X86 && PCI && INPUT && EXPERIMENTAL