在 2023/9/2 20:22, Konrad Dybcio 写道:
On 1.09.2023 16:10, Ziyang Huang wrote:
In pinctrl, the pinconfigs for uart are named "blspX_uartY".
X is the UART ID. Starts from 1.
1-6 are in BLSP Block 1.
7-12 are in BLSP Block 2.
Y is the index of mux config. Starts from 0.
In dts, the serials are also named "blspX_uartY", but with different logic.
X is the BLSP Block ID. Starts from 1.
Y is the uart id inside block.
In "ipq6018.dtsi" and "ipq8074.dtsi", it starts from 1.
But in "ipq5332.dtsi" and "ipq9574.dtsi", it starts from 0.
+-----------------+-----------------+-------------+-----------------+
| Block ID | ID inside Block | dts name | pinconfig name |
| (Starts from 1) | (Starts from 1) | | |
+-----------------+-----------------+-------------+-----------------+
| 1 | 1 | blsp1_uart1 | blsp0_uartY |
| 1 | 2 | blsp1_uart2 | blsp1_uartY |
| 1 | 6 | blsp1_uart6 | blsp5_uartY |
| 2 | 1 | blsp2_uart1 | blsp6_uartY |
| 2 | 6 | blsp2_uart6 | blsp12_uartY |
+-----------------+-----------------+-------------+-----------------+
In "ipq5018.dts", "blsp1_uart1" (dts name) is the first serial (confimed
by the address), So its pinconfig should be "blsp0_uart0" (pinconfig name,
use GPIO 20 and 21) or "blsp0_uart1" (pinconfig name, use GPIO 28 and 29).
Surely only one pair of wires is connected? Why is there an "OR"?
Konrad
Because it is configurable. Please read my previous email.
And these two groups can be connected at same time. This is what u-boot
does. It just like the parallel circuit. So there can be "or/and". lol...
