pwm: New driver to support PWM driven LEDs on TWL4030/6030 series of PMICs

The driver supports the following LED outputs as generic PWM driver:
TWL4030 LEDA and LEDB (PWMA and PWMB)
TWL6030 Charging indicator LED (PWM LED)

On TWL6030 when the PWM requested LED is configured to be controlled by SW.
In this case the user can enable/disable and set the duty period freely.
When the PWM has been freed, the LED driver is put back to HW control.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index e1792d5e3861..fe788a7c5495 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -182,6 +182,15 @@ config PWM_TWL
           To compile this driver as a module, choose M here: the module
           will be called pwm-twl.
 
+config PWM_TWL_LED
+        tristate "TWL4030/6030 PWM support for LED drivers"
+        depends on TWL4030_CORE
+        help
+          Generic PWM framework driver for TWL4030/6030 LED terminals.
+
+          To compile this driver as a module, choose M here: the module
+          will be called pwm-twl-led.
+
 config PWM_VT8500
         tristate "vt8500 pwm support"
         depends on ARCH_VT8500