counter: new TI eQEP driver
This adds a new counter driver for the Texas Instruments Enhanced
Quadrature Encoder Pulse (eQEP) module.
Only very basic functionality is currently implemented - only enough to
be able to read the position. The actual device has many more features
which can be added to the driver on an as-needed basis.
It is not possible to read the QEPA/B signal values in hardware, so
that feature is omitted.
The TI_PWMSS kernel option is selected in Kconfig to enable the parent
bus, which is needed for power management.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/counter/Kconfig b/drivers/counter/Kconfig
index 2967d0a9..c80fa76 100644
--- a/drivers/counter/Kconfig
+++ b/drivers/counter/Kconfig
@@ -49,6 +49,17 @@
To compile this driver as a module, choose M here: the
module will be called stm32-lptimer-cnt.
+config TI_EQEP
+ tristate "TI eQEP counter driver"
+ depends on (SOC_AM33XX || COMPILE_TEST)
+ select REGMAP_MMIO
+ help
+ Select this option to enable the Texas Instruments Enhanced Quadrature
+ Encoder Pulse (eQEP) counter driver.
+
+ To compile this driver as a module, choose M here: the module will be
+ called ti-eqep.
+
config FTM_QUADDEC
tristate "Flex Timer Module Quadrature decoder driver"
depends on HAS_IOMEM && OF