On 1.09.2023 16:10, Ziyang Huang wrote:
In pinctrl, the pinconfigs for uart are named "blspX_uartY".Surely only one pair of wires is connected? Why is there an "OR"?
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).
Konrad