scripts/genpinctrl: Remove mode for default (non-F1) config

Due to inference of mode for default configurations, mode
should not be set unless it specifies a specific signal variant.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

scripts/genpinctrl/stm32-pinctrl-config.yaml

@@ -11,10 +11,12 @@
 #     be as precise as possible. Note that it needs to be escaped here in the
 #     configuration file.
 #
-#   - mode (mandatory): Mode setting (analog, alternate). Mode needs to
+#   - mode (optional): Mode setting (analog, alternate). Mode needs to
 #     be set according to the following rules:
 #       * Pin operates in analog configuration: analog
 #       * Pin operates in alternate function configuration: alternate
+#     In default case, mode could be infered from CubeMX SoC description files
+#     and can be omitted.
 #
 #   - bias (optional): Bias setting (disable, pull-up, pull-down). Equivalent to
 #     "disable" (a.k.a floating) if not set.
@@ -33,167 +35,133 @@
 ---
 - name: ADC_IN / ADC_INN / ADC_INP
   match: "^ADC(?:\\d+)?_IN[NP]?\\d+$"
-  mode: analog
 
 - name: CAN_RX
   match: "^CAN\\d*_RX$"
-  mode: alternate
   bias: pull-up
 
 - name: CAN_TX
   match: "^CAN\\d*_TX$"
-  mode: alternate
 
 - name: DAC_OUT
   match: "^DAC(?:\\d+)?_OUT\\d+$"
-  mode: analog
 
 - name: ETH_COL
   match: "^ETH_COL$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_CRS
   match: "^ETH_CRS$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_CRS_DV
   match: "^ETH_CRS_DV$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_MDC
   match: "^ETH_MDC$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_MDIO
   match: "^ETH_MDIO$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_PPS_OUT
   match: "^ETH_PPS_OUT$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_REF_CLK
   match: "^ETH_REF_CLK$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RX_CLK
   match: "^ETH_RX_CLK$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RX_DV
   match: "^ETH_RX_DV$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RX_ER
   match: "^ETH_RX_ER$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RXD0
   match: "^ETH_RXD0$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RXD1
   match: "^ETH_RXD1$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RXD2
   match: "^ETH_RXD2$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_RXD3
   match: "^ETH_RXD3$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TX_CLK
   match: "^ETH_TX_CLK$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TX_EN
   match: "^ETH_TX_EN$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TXD0
   match: "^ETH_TXD0$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TXD1
   match: "^ETH_TXD1$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TXD2
   match: "^ETH_TXD2$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: ETH_TXD3
   match: "^ETH_TXD3$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: FDCAN_RX
   match: "^FDCAN\\d+_RX$"
-  mode: alternate
 
 - name: FDCAN_TX
   match: "^FDCAN\\d+_TX$"
-  mode: alternate
 
 - name: I2C_SCL
   match: "^I2C\\d+_SCL$"
-  mode: alternate
   drive: open-drain
   bias: pull-up
 
 - name: I2C_SDA
   match: "^I2C\\d+_SDA$"
-  mode: alternate
   drive: open-drain
   bias: pull-up
 
 - name: I2S_CK
   match: "^I2S\\d+_CK$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: I2S_WS
   match: "^I2S\\d+_WS$"
-  mode: alternate
 
 - name: I2S_SD
   match: "^I2S\\d+_SD$"
-  mode: alternate
 
 - name: SDMMC
   match: "^SDMMC\\d+_(?:CK)?(?:CKIN)?(?:CDIR)?(?:CMD)?(?:D\\d+)?(?:D0DIR)?(?:D123DIR)?$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: SPI_MISO
   match: "^SPI\\d+_MISO$"
-  mode: alternate
   bias: pull-down
 
 - name: SPI_MOSI
   match: "^SPI\\d+_MOSI$"
-  mode: alternate
   bias: pull-down
 
 # NOTE: The SPI_SCK pins speed must be set to very-high-speed to avoid last data
@@ -201,51 +169,40 @@
 # peripheral (ref. ES0182 Rev 12, 2.5.12, p. 22).
 - name: SPI_SCK
   match: "^SPI\\d+_SCK$"
-  mode: alternate
   slew-rate: very-high-speed
 
 - name: SPI_NSS
   match: "^SPI\\d+_NSS$"
-  mode: alternate
   bias: pull-up
 
 - name: TIM_CH / TIM_CHN
   match: "^TIM\\d+_CH\\d+N?$"
-  mode: alternate
 
 - name: UART_CTS / USART_CTS / LPUART_CTS
   match: "^(?:LP)?US?ART\\d+_CTS$"
-  mode: alternate
   drive: open-drain
   bias: pull-up
 
 - name: UART_RTS / USART_RTS / LPUART_RTS
   match: "^(?:LP)?US?ART\\d+_RTS$"
-  mode: alternate
   drive: open-drain
   bias: pull-up
 
 - name: UART_TX / USART_TX / LPUART_TX
   match: "^(?:LP)?US?ART\\d+_TX$"
-  mode: alternate
   bias: pull-up
 
 - name: UART_RX / USART_RX / LPUART_RX
   match: "^(?:LP)?US?ART\\d+_RX$"
-  mode: alternate
 
 - name: USB_OTG_FS
   match: "^USB_OTG_FS_(?:DM)?(?:DP)?(?:SOF)?(?:ID)?(?:VBUS)?$"
-  mode: alternate
 
 - name: USB_OTG_HS
   match: "^USB_OTG_HS_(?:DM)?(?:DP)?(?:SOF)?(?:ID)?(?:VBUS)?$"
-  mode: alternate
 
 - name: USB_OTG_HS_ULPI
   match: "^USB_OTG_HS_ULPI_(?:DIR)?(?:STP)?(?:NXT)?(?:D\\d+)?$"
-  mode: alternate
 
 - name: USB
   match: "^USB_(?:DM)?(?:DP)?(?:NOE)?$"
-  mode: alternate