From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
Add documentation for the pin controller found on the Renesas RZ/V2H(P)
(R9A09G057) SoC. Compared to RZ/G2L family of SoCs there are slight
differences on the RZ/V2H(P) SoC for pinmuxing.
Also add 'renesas-rzv2h,output-impedance' property. Drive strength
setting on RZ/V2H(P) depends on the different power rails which are
coming out from the PMIC (connected via i2c). These power rails
(required for drive strength) can be 1.2/1.8/3.3V.
Pin are grouped into 4 groups,
Group1: Impedance
- 150/75/38/25 ohms (at 3.3 V)
- 130/65/33/22 ohms (at 1.8 V)
Group2: Impedance
- 50/40/33/25 ohms (at 1.8 V)
Group3: Impedance
- 150/75/37.5/25 ohms (at 3.3 V)
- 130/65/33/22 ohms (at 1.8 V)
Group4: Impedance
- 110/55/30/20 ohms (at 1.8 V)
- 150/75/38/25 ohms (at 1.2 V)
'renesas-rzv2h,output-impedance' property as documented which can be
[1, 2, 4, 6] indicates x Value strength.
As the power rail information cannot be available very early in the
boot process as 'renesas-rzv2h,output-impedance' property is added
instead of reusing output-impedance-ohms property.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
.../pinctrl/renesas,rzg2l-pinctrl.yaml | 22 +++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
index 881e992adca3..77f4fc7f4a21 100644
--- a/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
@@ -26,6 +26,7 @@ properties:
- renesas,r9a07g043-pinctrl # RZ/G2UL{Type-1,Type-2} and RZ/Five
- renesas,r9a07g044-pinctrl # RZ/G2{L,LC}
- renesas,r9a08g045-pinctrl # RZ/G3S
+ - renesas,r9a09g057-pinctrl # RZ/V2H(P)
- items:
- enum:
@@ -66,10 +67,14 @@ properties:
maxItems: 1
resets:
- items:
- - description: GPIO_RSTN signal
- - description: GPIO_PORT_RESETN signal
- - description: GPIO_SPARE_RESETN signal
+ oneOf:
+ - items:
+ - description: GPIO_RSTN signal
+ - description: GPIO_PORT_RESETN signal
+ - description: GPIO_SPARE_RESETN signal
+ - items:
+ - description: PFC main reset
+ - description: Reset for the control register related to WDTUDFCA and WDTUDFFCM pins
additionalProperties:
anyOf:
@@ -111,6 +116,15 @@ additionalProperties:
output-high: true
output-low: true
line-name: true
+ renesas-rzv2h,output-impedance:
+ description: |
+ Output impedance for pins on RZ/V2H(P) SoC.
+ x1: Corresponds to 0 in IOLH register.
+ x2: Corresponds to 1 in IOLH register.
+ x4: Corresponds to 2 in IOLH register.
+ x6: Corresponds to 3 in IOLH register.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2, 4, 6]
- type: object
additionalProperties:
--
2.34.1
