pwm: Add Renesas TPU PWM driver

The Timer Pulse Unit (TPU) is a 4-channels 16-bit timer used to generate
waveforms. This driver exposes PWM functions through the PWM API for
other drivers to use.

The code is loosely based on the leds-renesas-tpu driver by Magnus Damm
and the TPU PWM driver shipped in the Armadillo EVA 800 kernel sources.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 406a4d94ddb9..75840b5cea6d 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -128,6 +128,16 @@ config PWM_PXA
           To compile this driver as a module, choose M here: the module
           will be called pwm-pxa.
 
+config PWM_RENESAS_TPU
+        tristate "Renesas TPU PWM support"
+        depends on ARCH_SHMOBILE
+        help
+          This driver exposes the Timer Pulse Unit (TPU) PWM controller found
+          in Renesas chips through the PWM API.
+
+          To compile this driver as a module, choose M here: the module
+          will be called pwm-renesas-tpu.
+
 config PWM_SAMSUNG
         tristate "Samsung PWM support"
         depends on PLAT_SAMSUNG