diff options
| author | Anurag Dutta <a-dutta@ti.com> | 2024-11-27 13:26:44 +0530 |
|---|---|---|
| committer | Nishanth Menon <nm@ti.com> | 2025-01-02 10:19:59 -0600 |
| commit | 6b51892b31fe83fe7cc8cf69e4bf7721cf08951b (patch) | |
| tree | 4477cfd2a891731fc14f38d301c2f4a4a72c0570 | |
| parent | b48888c9c4af15fcaa57076aeff6c48c90809bc5 (diff) | |
arm64: dts: ti: k3-j7200: Add node to disable loopback connection
CTRLMMR_MCU_SPI1_CTRL register controls if MCU_SPI1 is directly
connected to SPI3 in the MAIN Domain (default) or if MCU_SPI1
and SPI3 are independently pinned out. By default, the field
SPI1_LINKDIS (Bit 0) is set to 0h. In order to disable the direct
connection, the SPI1_LINKDIS (Bit 0) needs to be set to 1h. Model
this functionality as a "reg-mux" device and based on the idle-state
property, enable/disable the connection bewtween MCU_SPI1 and MAIN_SPI3.
The register field description has been referred from J7200 TRM [1]
(Table 5-517. CTRLMMR_MCU_SPI1_CTRL Register Field Descriptions).
[1] https://www.ti.com/lit/pdf/spruiu1
Signed-off-by: Anurag Dutta <a-dutta@ti.com>
Link: https://lore.kernel.org/r/20241127075644.210759-1-a-dutta@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>
| -rw-r--r-- | arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts | 4 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts index db43e7e10b76..f684ce6ad9ad 100644 --- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts @@ -409,6 +409,10 @@ <J7200_SERDES0_LANE2_QSGMII_LANE1>, <J7200_SERDES0_LANE3_IP4_UNUSED>; }; +&mcu_spi1 { + mux-controls = <&spi1_linkdis 0>; +}; + &usb_serdes_mux { idle-states = <1>; /* USB0 to SERDES lane 3 */ bootph-all; diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi index 6a8453865874..56ab144fea07 100644 --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi @@ -184,6 +184,13 @@ reg = <0x4040 0x4>; #phy-cells = <1>; }; + + spi1_linkdis: mux-controller@4060 { + compatible = "reg-mux"; + reg = <0x4060 0x4>; + #mux-control-cells = <1>; + mux-reg-masks = <0x0 0x1>; + }; }; wkup_conf: bus@43000000 { |