Phytium PWM support

Generic PWM framework driver for the PWM controller found on
Phytium SoCs.

Signed-off-by: xu yan <[email protected]>
Signed-off-by: Chen Zhenhua <[email protected]>
Signed-off-by: Wang Yinfeng <[email protected]>
Signed-off-by: lanhengyu1395 <[email protected]>

Documentation/devicetree/bindings/pwm/phytium,pwm.yaml

@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/phytium,pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium PWM controller
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+allOf:
+  - $ref: pwm.yaml#
+
+properties:
+  compatible:
+    const: phytium,pwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description: Clock specifiers for both ipg and per clocks.
+
+  interrupts:
+    maxItems: 1
+
+  phytium,db:
+    description: |
+      One or two <cntmod dutymod div updbcly dbpolarity> to describe dead-band configurations.
+      "cntmod" indicates the counter mode (0 for modulo, 1 for up-and-down).
+      "dutymod" indicdates which duty to compare with (0 for PMW_CCR, 1 for FIFO).
+      "div" selects the clock divider value, from 0 to 1023.
+      "updbcly" selects the rising edge delay cycles.
+      "dbpolarity" selects the polarity for dead-band.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    uniqueItems: true
+    items:
+      minimum: 1
+      maximum: 2
+
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+  - phytium,db
+
+additionalProperties: false
+
+examples:
+  - |
+    pwm0: pwm@2804a000 {
+      compatible = "phytium,pwm";
+      reg= <0x0 0x2804a000 0x0 0x1000>;
+      interrupts = <GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&sysclk_48mhz>;
+      phytium,db = <0 0 0 1000 0>;
+    };

drivers/pwm/Kconfig

@@ -454,6 +454,16 @@ config PWM_PCA9685
 	  To compile this driver as a module, choose M here: the module
 	  will be called pwm-pca9685.
 
+config PWM_PHYTIUM
+	tristate "Phytium PWM support"
+	depends on ARCH_PHYTIUM
+	help
+	  Generic PWM framework driver for the PWM controller found on
+	  Phytium SoCs.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called pwm-phytium.
+
 config PWM_PXA
 	tristate "PXA PWM support"
 	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST

drivers/pwm/Makefile

@@ -41,6 +41,7 @@ obj-$(CONFIG_PWM_MXS)		+= pwm-mxs.o
 obj-$(CONFIG_PWM_NTXEC)		+= pwm-ntxec.o
 obj-$(CONFIG_PWM_OMAP_DMTIMER)	+= pwm-omap-dmtimer.o
 obj-$(CONFIG_PWM_PCA9685)	+= pwm-pca9685.o
+obj-$(CONFIG_PWM_PHYTIUM)	+= pwm-phytium.o
 obj-$(CONFIG_PWM_PXA)		+= pwm-pxa.o
 obj-$(CONFIG_PWM_RASPBERRYPI_POE)	+= pwm-raspberrypi-poe.o
 obj-$(CONFIG_PWM_RCAR)		+= pwm-rcar.o