[PATCH v2 0/2] Add RZ/G2L POEG support

[PATCH v2 0/2] Add RZ/G2L POEG support

[Biju Das]

The output pins of the general PWM timer (GPT) can be disabled by using the port
output enabling function for the GPT (POEG). Specifically, either of the
following ways can be used.

  * Input level detection of the GTETRGA to GTETRGD pins.
  * Output-disable request from the GPT.
  * Register setting(ie, by setting POEGGn.SSF to 1)

This patch series add support for controlling output disable function using sysfs.

For output disable operation, POEG group needs to be linked with GPT.
Plan to send a follow up patch with renesas,poeg-group as numeric
property in pwm bindings for linking both GPT and POEG devices.

v1->v2:
 * Updated binding description.
 * Renamed the file poeg-rzg2l->rzg2l-poeg
 * Removed the macro POEGG as there is only single register and
   updated rzg2l_poeg_write() and rzg2l_poeg_read()
 * Updated error handling in probe()
REF->v1:
 * Modelled as pincontrol as most of its configuration is intended to be
   static and moved driver files from soc to pincontrol directory.
 * Updated reg size in dt binding example.
 * Updated Kconfig

REF:
https://lore.kernel.org/linux-renesas-soc/20220510151112.16249-1-biju.das.jz@bp.renesas.com/

Biju Das (2):
  dt-bindings: pinctrl: renesas: Add RZ/G2L POEG binding
  drivers: pinctrl: renesas: Add RZ/G2L POEG driver support

 .../bindings/pinctrl/renesas,rzg2l-poeg.yaml  |  68 ++++++++
 drivers/pinctrl/renesas/Kconfig               |   2 +
 drivers/pinctrl/renesas/Makefile              |   2 +
 drivers/pinctrl/renesas/poeg/Kconfig          |  12 ++
 drivers/pinctrl/renesas/poeg/Makefile         |   2 +
 drivers/pinctrl/renesas/poeg/rzg2l-poeg.c     | 147 ++++++++++++++++++
 6 files changed, 233 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
 create mode 100644 drivers/pinctrl/renesas/poeg/Kconfig
 create mode 100644 drivers/pinctrl/renesas/poeg/Makefile
 create mode 100644 drivers/pinctrl/renesas/poeg/rzg2l-poeg.c

-- 
2.25.1

[PATCH v2 1/2] dt-bindings: pinctrl: renesas: Add RZ/G2L POEG binding

[Biju Das]

Add device tree bindings for the RZ/G2L Port Output Enable for GPT (POEG).

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v1->v2:
 * Updated the description.
REF->v1:
 * Modelled as pincontrol as most of its configuration is intended to be
   static.
 * Updated reg size in example.
---
 .../bindings/pinctrl/renesas,rzg2l-poeg.yaml  | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
new file mode 100644
index 000000000000..decd87aa7b56
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/renesas,rzg2l-poeg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G2L Port Output Enable for GPT (POEG)
+
+maintainers:
+  - Biju Das <biju.das.jz@bp.renesas.com>
+
+description: |
+  The output pins(GTIOCxA and GTIOCxB) of the general PWM timer (GPT) can be
+  disabled by using the port output enabling function for the GPT (POEG).
+  Specifically, either of the following ways can be used.
+  * Input level detection of the GTETRGA to GTETRGD pins.
+  * Output-disable request from the GPT.
+  * SSF bit setting(ie, by setting POEGGn.SSF to 1)
+
+  The state of the GTIOCxA and the GTIOCxB pins when the output is disabled,
+  are controlled by the GPT module.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a07g044-poeg  # RZ/G2{L,LC}
+          - renesas,r9a07g054-poeg  # RZ/V2L
+      - const: renesas,rzg2l-poeg
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - power-domains
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a07g044-cpg.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    poeggd: poeg@10049400 {
+        compatible = "renesas,r9a07g044-poeg", "renesas,rzg2l-poeg";
+        reg = <0x10049400 0x400>;
+        interrupts = <GIC_SPI 325 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD R9A07G044_POEG_D_CLKP>;
+        power-domains = <&cpg>;
+        resets = <&cpg R9A07G044_POEG_D_RST>;
+    };
-- 
2.25.1

Re: [PATCH v2 1/2] dt-bindings: pinctrl: renesas: Add RZ/G2L POEG binding

[Rob Herring]

On Fri, 29 Jul 2022 13:24:47 +0100, Biju Das wrote:
> Add device tree bindings for the RZ/G2L Port Output Enable for GPT (POEG).
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v1->v2:
>  * Updated the description.
> REF->v1:
>  * Modelled as pincontrol as most of its configuration is intended to be
>    static.
>  * Updated reg size in example.
> ---
>  .../bindings/pinctrl/renesas,rzg2l-poeg.yaml  | 68 +++++++++++++++++++
>  1 file changed, 68 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-poeg.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>