2020-03-15 09:52:03

by Katsuhiro Suzuki

Subject: [PATCH] ARM: dts: rockchip: use DMA channels for UARTs for RK3288

This patch enables to use DMAC for all UARTs that are connected to
dmac_peri core for Rochchip RK3288.

Only uart2 is connected different DMAC (dmac_bus_s) so keep current
settings on this patch.

Signed-off-by: Katsuhiro Suzuki <[email protected]>
---
arch/arm/boot/dts/rk3288.dtsi | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
index 8bcb4a51682e..e9f8a44f5f2a 100644
--- a/arch/arm/boot/dts/rk3288.dtsi
+++ b/arch/arm/boot/dts/rk3288.dtsi
@@ -420,6 +420,8 @@ uart0: serial@ff180000 {
reg-io-width = <4>;
clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>;
clock-names = "baudclk", "apb_pclk";
+ dmas = <&dmac_peri 1>, <&dmac_peri 2>;
+ dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&uart0_xfer>;
status = "disabled";
@@ -433,6 +435,8 @@ uart1: serial@ff190000 {
reg-io-width = <4>;
clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
clock-names = "baudclk", "apb_pclk";
+ dmas = <&dmac_peri 3>, <&dmac_peri 4>;
+ dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&uart1_xfer>;
status = "disabled";
@@ -459,6 +463,8 @@ uart3: serial@ff1b0000 {
reg-io-width = <4>;
clocks = <&cru SCLK_UART3>, <&cru PCLK_UART3>;
clock-names = "baudclk", "apb_pclk";
+ dmas = <&dmac_peri 7>, <&dmac_peri 8>;
+ dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&uart3_xfer>;
status = "disabled";
@@ -472,6 +478,8 @@ uart4: serial@ff1c0000 {
reg-io-width = <4>;
clocks = <&cru SCLK_UART4>, <&cru PCLK_UART4>;
clock-names = "baudclk", "apb_pclk";
+ dmas = <&dmac_peri 9>, <&dmac_peri 10>;
+ dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&uart4_xfer>;
status = "disabled";
--
2.25.1

2020-03-17 00:30:26

by Heiko Stuebner

Subject: Re: [PATCH] ARM: dts: rockchip: use DMA channels for UARTs for RK3288

Am Sonntag, 15. M?rz 2020, 10:51:15 CET schrieb Katsuhiro Suzuki:
> This patch enables to use DMAC for all UARTs that are connected to
> dmac_peri core for Rochchip RK3288.
>
> Only uart2 is connected different DMAC (dmac_bus_s) so keep current
> settings on this patch.
>
> Signed-off-by: Katsuhiro Suzuki <[email protected]>

applied for 5.7

Thanks
Heiko