The RZ/G2L multi-function timer pulse unit 3 (MTU3a) is embedded in
the Renesas RZ/G2L family SoC's. It consists of eight 16-bit timer
channels and one 32-bit timer channel. It supports the following
functions
- Counter
- Timer
- PWM
This patch series aim to add MFD and pwm driver for MTU3a.
The 8/16/32 bit registers are mixed in each channel. The HW
specifications of the IP is described in patch#1.
Current patch set is tested for PWM mode1 on MTU3 channel
and 16 and 32 bit phase counting modes.
v2->v3:
* Dropped counter bindings and integrated with mfd as it has only one property.
* Removed "#address-cells" and "#size-cells" as it do not have children with
unit addresses.
* Removed quotes from counter and pwm.
* Provided full path for pwm bindings.
* Updated the binding example.
* removed unwanted header files
* Added LUT for 32 bit registers as it needed for 32-bit cascade counting.
* Exported 32 bit read/write functions.
* Modelled as a counter device supporting 3 counters(2 16-bit and
32-bit)
* Add kernel-doc comments to document struct rz_mtu3_cnt
* Removed mmio variable from struct rz_mtu3_cnt
* Removed cnt local variable from rz_mtu3_count_read()
* Replaced -EINVAL->-ERANGE for out of range error conditions.
* Removed explicit cast from write functions.
* Removed local variable val from rz_mtu3_count_ceiling_read()
* Added lock for RMW for counter/ceiling updates.
* Added different synapses for counter0 and counter{1,2}
* Used ARRAY for assigning num_counts.
* Added PM runtime for managing clocks.
* Add MODULE_IMPORT_NS(COUNTER) to import the COUNTER namespace.
RFC->v2:
* replaced devm_reset_control_get->devm_reset_control_get_exclusive
* Dropped 'bindings' from the binding title
* Updated the binding example
* Added additionalProperties: false for counter bindings
* Squashed all the binding patches
* Modelled as a single counter device providing both 16-bit
and 32-bit phase counting modes
* Modelled as a single pwm device for supporting different pwm modes.
* Moved counter and pwm bindings to respective subsystems.
Biju Das (4):
dt-bindings: mfd: Document RZ/G2L MTU3a bindings
mfd: Add RZ/G2L MTU3 driver
pwm: Add support for RZ/G2L MTU3 PWM
counter: Add RZ/G2L MTU3 counter driver
.../bindings/mfd/renesas,rz-mtu3.yaml | 304 ++++++++++
.../bindings/pwm/renesas,rz-mtu3-pwm.yaml | 50 ++
drivers/counter/Kconfig | 9 +
drivers/counter/Makefile | 1 +
drivers/counter/rz-mtu3-cnt.c | 568 ++++++++++++++++++
drivers/mfd/Kconfig | 9 +
drivers/mfd/Makefile | 1 +
drivers/mfd/rz-mtu3.c | 436 ++++++++++++++
drivers/pwm/Kconfig | 11 +
drivers/pwm/Makefile | 1 +
drivers/pwm/pwm-rz-mtu3.c | 462 ++++++++++++++
include/linux/mfd/rz-mtu3.h | 183 ++++++
12 files changed, 2035 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/renesas,rz-mtu3.yaml
create mode 100644 Documentation/devicetree/bindings/pwm/renesas,rz-mtu3-pwm.yaml
create mode 100644 drivers/counter/rz-mtu3-cnt.c
create mode 100644 drivers/mfd/rz-mtu3.c
create mode 100644 drivers/pwm/pwm-rz-mtu3.c
create mode 100644 include/linux/mfd/rz-mtu3.h
--
2.25.1
