mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-04 02:25:58 +00:00
57b4ca4235
The UART controllers in most Rockchip SoCs are part of power domains that are always powered on. These always powered on power domains have typically not been described in the device tree. Because these power domains have been left out of the device tree there has not been any real need to properly describe the UART controllers power domain of Rockchip SoCs. On Rockchip RK3528 the UART controllers are spread out among the described PD_RKVENC, PD_VO and PD_VPU power domains. However, one UART controller belong to an undescribed always powered on power domain. Add support to describe an optional power-domains for the UART controllers. Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20250723085654.2273324-5-jonas@kwiboo.se Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
193 lines
4.5 KiB
YAML
193 lines
4.5 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/serial/snps-dw-apb-uart.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Synopsys DesignWare ABP UART
|
|
|
|
maintainers:
|
|
- Rob Herring <robh@kernel.org>
|
|
|
|
allOf:
|
|
- $ref: serial.yaml#
|
|
- $ref: rs485.yaml#
|
|
|
|
- if:
|
|
properties:
|
|
compatible:
|
|
items:
|
|
- {}
|
|
- const: renesas,rzn1-uart
|
|
- const: snps,dw-apb-uart
|
|
then:
|
|
properties:
|
|
dmas: false
|
|
dma-names: false
|
|
|
|
- if:
|
|
properties:
|
|
compatible:
|
|
contains:
|
|
const: starfive,jh7110-uart
|
|
then:
|
|
properties:
|
|
resets:
|
|
minItems: 2
|
|
else:
|
|
properties:
|
|
resets:
|
|
maxItems: 1
|
|
|
|
properties:
|
|
compatible:
|
|
oneOf:
|
|
- items:
|
|
- const: renesas,r9a06g032-uart
|
|
- const: renesas,rzn1-uart
|
|
- const: snps,dw-apb-uart
|
|
- items:
|
|
- const: renesas,r9a06g032-uart
|
|
- const: renesas,rzn1-uart
|
|
- items:
|
|
- enum:
|
|
- brcm,bcm11351-dw-apb-uart
|
|
- brcm,bcm21664-dw-apb-uart
|
|
- rockchip,px30-uart
|
|
- rockchip,rk1808-uart
|
|
- rockchip,rk3036-uart
|
|
- rockchip,rk3066-uart
|
|
- rockchip,rk3128-uart
|
|
- rockchip,rk3188-uart
|
|
- rockchip,rk3288-uart
|
|
- rockchip,rk3308-uart
|
|
- rockchip,rk3328-uart
|
|
- rockchip,rk3368-uart
|
|
- rockchip,rk3399-uart
|
|
- rockchip,rk3528-uart
|
|
- rockchip,rk3562-uart
|
|
- rockchip,rk3568-uart
|
|
- rockchip,rk3576-uart
|
|
- rockchip,rk3588-uart
|
|
- rockchip,rv1108-uart
|
|
- rockchip,rv1126-uart
|
|
- sophgo,sg2044-uart
|
|
- starfive,jh7100-hsuart
|
|
- starfive,jh7100-uart
|
|
- starfive,jh7110-uart
|
|
- const: snps,dw-apb-uart
|
|
- const: snps,dw-apb-uart
|
|
|
|
reg:
|
|
maxItems: 1
|
|
|
|
interrupts:
|
|
maxItems: 1
|
|
|
|
clock-frequency: true
|
|
|
|
clocks:
|
|
minItems: 1
|
|
maxItems: 2
|
|
|
|
clock-names:
|
|
items:
|
|
- const: baudclk
|
|
- const: apb_pclk
|
|
|
|
dmas:
|
|
maxItems: 2
|
|
|
|
dma-names:
|
|
items:
|
|
- const: tx
|
|
- const: rx
|
|
|
|
snps,uart-16550-compatible:
|
|
description: reflects the value of UART_16550_COMPATIBLE configuration
|
|
parameter. Define this if your UART does not implement the busy functionality.
|
|
type: boolean
|
|
|
|
power-domains:
|
|
maxItems: 1
|
|
|
|
resets:
|
|
minItems: 1
|
|
maxItems: 2
|
|
|
|
reg-shift: true
|
|
|
|
reg-io-width: true
|
|
|
|
dcd-override:
|
|
description: Override the DCD modem status signal. This signal will
|
|
always be reported as active instead of being obtained from the modem
|
|
status register. Define this if your serial port does not use this
|
|
pin.
|
|
type: boolean
|
|
|
|
dsr-override:
|
|
description: Override the DTS modem status signal. This signal will
|
|
always be reported as active instead of being obtained from the modem
|
|
status register. Define this if your serial port does not use this
|
|
pin.
|
|
type: boolean
|
|
|
|
cts-override:
|
|
description: Override the CTS modem status signal. This signal will
|
|
always be reported as active instead of being obtained from the modem
|
|
status register. Define this if your serial port does not use this
|
|
pin.
|
|
type: boolean
|
|
|
|
ri-override:
|
|
description: Override the RI modem status signal. This signal will always
|
|
be reported as inactive instead of being obtained from the modem status
|
|
register. Define this if your serial port does not use this pin.
|
|
type: boolean
|
|
|
|
required:
|
|
- compatible
|
|
- reg
|
|
|
|
unevaluatedProperties: false
|
|
|
|
examples:
|
|
- |
|
|
serial@80230000 {
|
|
compatible = "snps,dw-apb-uart";
|
|
reg = <0x80230000 0x100>;
|
|
clock-frequency = <3686400>;
|
|
interrupts = <10>;
|
|
reg-shift = <2>;
|
|
reg-io-width = <4>;
|
|
dcd-override;
|
|
dsr-override;
|
|
cts-override;
|
|
ri-override;
|
|
};
|
|
|
|
- |
|
|
// Example with one clock:
|
|
serial@80230000 {
|
|
compatible = "snps,dw-apb-uart";
|
|
reg = <0x80230000 0x100>;
|
|
clocks = <&baudclk>;
|
|
interrupts = <10>;
|
|
reg-shift = <2>;
|
|
reg-io-width = <4>;
|
|
};
|
|
|
|
- |
|
|
// Example with two clocks:
|
|
serial@80230000 {
|
|
compatible = "snps,dw-apb-uart";
|
|
reg = <0x80230000 0x100>;
|
|
clocks = <&baudclk>, <&apb_pclk>;
|
|
clock-names = "baudclk", "apb_pclk";
|
|
interrupts = <10>;
|
|
reg-shift = <2>;
|
|
reg-io-width = <4>;
|
|
};
|
|
...
|