In the Linux pinctrl binding, the pin configuration nodes don't need to be direct children of the pin controller device (may be grandchildren for example). This behavior is managed with the pinconfig u-class which recursively bind all the sub-node of the pin controller.
But for some binding (when pin configuration is only children of pin controller) that is not necessary. U-Boot can save memory and reduce the number of pinconf instance when this feature is deactivated (for arch stm32mp for example for SPL).
This patch allows to control this feature with a new option CONFIG_PINCONF_RECURSIVE when it is possible for each individual pin controller device.
Signed-off-by: Patrick Delaunay patrick.delaunay@st.com ---
Hi,
Found her a proposal to have a more clear output of "dm tree" command and to reduce the memory footprint of PINCTRL_FULL for the arch stm32mp1 (bdinfo "Early malloc usage" is reduced from 2588 to 2144).
On stm32mp157c-ev1, each pin configuration have one other several sub node "pins"
pinctrl: pin-controller@50002000 { ... adc12_usb_pwr_pins_a: adc12-usb-pwr-pins-0 { pins { pinmux = <STM32_PINMUX('A', 4, ANALOG)>, /* ADC12 in18 */ <STM32_PINMUX('A', 5, ANALOG)>; /* ADC12 in19 */ }; };
cec_pins_a: cec-0 { pins { pinmux = <STM32_PINMUX('A', 15, AF4)>; bias-disable; drive-open-drain; slew-rate = <0>; }; };
cec_pins_sleep_a: cec-sleep-0 { pins { pinmux = <STM32_PINMUX('A', 15, ANALOG)>; /* HDMI_CEC */ }; }; ... ethernet0_rgmii_pins_a: rgmii-0 { pins1 { pinmux = <STM32_PINMUX('G', 5, AF11)>, /* ETH_RGMII_CLK125 */ <STM32_PINMUX('G', 4, AF11)>, /* ETH_RGMII_GTX_CLK */ <STM32_PINMUX('G', 13, AF11)>, /* ETH_RGMII_TXD0 */ <STM32_PINMUX('G', 14, AF11)>, /* ETH_RGMII_TXD1 */ <STM32_PINMUX('C', 2, AF11)>, /* ETH_RGMII_TXD2 */ <STM32_PINMUX('E', 2, AF11)>, /* ETH_RGMII_TXD3 */ <STM32_PINMUX('B', 11, AF11)>, /* ETH_RGMII_TX_CTL */ <STM32_PINMUX('C', 1, AF11)>; /* ETH_MDC */ bias-disable; drive-push-pull; slew-rate = <2>; }; pins2 { pinmux = <STM32_PINMUX('A', 2, AF11)>; /* ETH_MDIO */ bias-disable; drive-push-pull; slew-rate = <0>; }; pins3 { pinmux = <STM32_PINMUX('C', 4, AF11)>, /* ETH_RGMII_RXD0 */ <STM32_PINMUX('C', 5, AF11)>, /* ETH_RGMII_RXD1 */ <STM32_PINMUX('B', 0, AF11)>, /* ETH_RGMII_RXD2 */ <STM32_PINMUX('B', 1, AF11)>, /* ETH_RGMII_RXD3 */ <STM32_PINMUX('A', 1, AF11)>, /* ETH_RGMII_RX_CLK */ <STM32_PINMUX('A', 7, AF11)>; /* ETH_RGMII_RX_CTL */ bias-disable; }; }; ...
before the patch all "pins" subnode are bounded but are unused.
STM32MP> dm tree Class Index Probed Driver Name ----------------------------------------------------------- root 0 [ + ] root_driver root_driver sysreset 0 [ ] syscon_reboot |-- reboot simple_bus 0 [ + ] generic_simple_bus |-- soc serial 0 [ + ] serial_stm32 | |-- serial@40010000 i2c 0 [ ] stm32f7-i2c | |-- i2c@40013000 i2c_generi 0 [ ] stmfx | | `-- stmfx@42 i2c 1 [ ] stm32f7-i2c | |-- i2c@40015000 usb 0 [ ] dwc2-udc-otg | |-- usb-otg@49000000 hwspinlock 0 [ + ] hwspinlock_stm32mp1 | |-- hwspinlock@4c000000 mailbox 0 [ ] stm32_ipcc | |-- mailbox@4c001000 misc 0 [ + ] stm32-rcc | |-- rcc@50000000 clk 0 [ + ] stm32mp1_clk | | |-- stm32mp1_clk reset 0 [ + ] stm32_rcc_reset | | `-- stm32_rcc_reset syscon 0 [ + ] stmp32mp_syscon | |-- pwr@50001000 pmic 0 [ + ] stm32mp_pwr_pmic | | `-- pwr-regulators regulator 0 [ + ] stm32mp_pwr_regulato | | |-- reg11 regulator 1 [ + ] stm32mp_pwr_regulato | | |-- reg18 regulator 2 [ + ] stm32mp_pwr_regulato | | `-- usb33 syscon 1 [ ] syscon | |-- interrupt-controller@5000d000 syscon 2 [ + ] stmp32mp_syscon | |-- syscon@50020000 mtd 0 [ + ] stm32_fmc2_nand | |-- nand-controller@58002000 spi 0 [ ] stm32_qspi | |-- spi@58003000 spi_flash 0 [ ] spi_flash_std | | |-- mx66l51235l@0 spi_flash 1 [ ] spi_flash_std | | `-- mx66l51235l@1 mmc 0 [ + ] stm32_sdmmc2 | |-- sdmmc@58005000 blk 0 [ + ] mmc_blk | | `-- sdmmc@58005000.blk mmc 1 [ + ] stm32_sdmmc2 | |-- sdmmc@58007000 blk 1 [ ] mmc_blk | | `-- sdmmc@58007000.blk eth 0 [ + ] eth_eqos | |-- ethernet@5800a000 usb 0 [ ] ehci_generic | |-- usbh-ehci@5800d000 phy 0 [ ] stm32-usbphyc | |-- usbphyc@5a006000 i2c 2 [ + ] stm32f7-i2c | |-- i2c@5c002000 pmic 1 [ + ] stpmic1_pmic | | `-- stpmic@33 regulator 3 [ + ] stpmic1_buck | | |-- buck1 regulator 4 [ + ] stpmic1_buck | | |-- buck2 regulator 5 [ + ] stpmic1_buck | | |-- buck3 regulator 6 [ + ] stpmic1_buck | | |-- buck4 regulator 7 [ + ] stpmic1_ldo | | |-- ldo1 regulator 8 [ + ] stpmic1_ldo | | |-- ldo2 regulator 9 [ + ] stpmic1_ldo | | |-- ldo3 regulator 10 [ + ] stpmic1_ldo | | |-- ldo4 regulator 11 [ + ] stpmic1_ldo | | |-- ldo5 regulator 12 [ + ] stpmic1_ldo | | |-- ldo6 regulator 13 [ + ] stpmic1_vref_ddr | | |-- vref_ddr regulator 14 [ + ] stpmic1_boost | | |-- boost regulator 15 [ + ] stpmic1_pwr_sw | | |-- pwr_sw1 regulator 16 [ + ] stpmic1_pwr_sw | | |-- pwr_sw2 sysreset 1 [ ] stpmic1-sysreset | | `-- stpmic1-sysreset rtc 0 [ ] rtc-stm32 | |-- rtc@5c004000 misc 1 [ + ] stm32mp_bsec | |-- nvmem@5c005000 pinctrl 0 [ + ] pinctrl_stm32 | |-- pin-controller@50002000 gpio 0 [ + ] gpio_stm32 | | |-- gpio@50002000 gpio 1 [ + ] gpio_stm32 | | |-- gpio@50003000 gpio 2 [ + ] gpio_stm32 | | |-- gpio@50004000 gpio 3 [ + ] gpio_stm32 | | |-- gpio@50005000 gpio 4 [ + ] gpio_stm32 | | |-- gpio@50006000 gpio 5 [ + ] gpio_stm32 | | |-- gpio@50007000 gpio 6 [ + ] gpio_stm32 | | |-- gpio@50008000 gpio 7 [ + ] gpio_stm32 | | |-- gpio@50009000 gpio 8 [ ] gpio_stm32 | | |-- gpio@5000a000 gpio 9 [ ] gpio_stm32 | | |-- gpio@5000b000 gpio 10 [ ] gpio_stm32 | | |-- gpio@5000c000 pinconfig 0 [ ] pinconfig | | |-- adc12-usb-pwr-pins-0 pinconfig 1 [ ] pinconfig | | | `-- pins pinconfig 2 [ ] pinconfig | | |-- cec-0 pinconfig 3 [ ] pinconfig | | | `-- pins pinconfig 4 [ ] pinconfig | | |-- cec-sleep-0 pinconfig 5 [ ] pinconfig | | | `-- pins pinconfig 6 [ ] pinconfig | | |-- cec-1 pinconfig 7 [ ] pinconfig | | | `-- pins pinconfig 8 [ ] pinconfig | | |-- cec-sleep-1 pinconfig 9 [ ] pinconfig | | | `-- pins pinconfig 10 [ + ] pinconfig | | |-- rgmii-0 pinconfig 11 [ ] pinconfig | | | |-- pins1 pinconfig 12 [ ] pinconfig | | | |-- pins2 pinconfig 13 [ ] pinconfig | | | `-- pins3 pinconfig 14 [ ] pinconfig | | |-- rgmii-sleep-0 pinconfig 15 [ ] pinconfig | | | `-- pins1 pinconfig 16 [ + ] pinconfig | | |-- fmc-0 pinconfig 17 [ ] pinconfig | | | |-- pins1 pinconfig 18 [ ] pinconfig | | | `-- pins2 pinconfig 19 [ ] pinconfig | | |-- fmc-sleep-0 pinconfig 20 [ ] pinconfig | | | `-- pins pinconfig 21 [ ] pinconfig | | |-- i2c1-0 pinconfig 22 [ ] pinconfig | | | `-- pins pinconfig 23 [ ] pinconfig | | |-- i2c1-1 pinconfig 24 [ ] pinconfig | | | `-- pins pinconfig 25 [ ] pinconfig | | |-- i2c1-2 pinconfig 26 [ ] pinconfig | | | `-- pins pinconfig 27 [ ] pinconfig | | |-- i2c2-0 pinconfig 28 [ ] pinconfig | | | `-- pins pinconfig 29 [ ] pinconfig | | |-- i2c2-1 pinconfig 30 [ ] pinconfig | | | `-- pins pinconfig 31 [ ] pinconfig | | |-- i2c2-2 pinconfig 32 [ ] pinconfig | | | `-- pins pinconfig 33 [ ] pinconfig | | |-- i2c5-0 pinconfig 34 [ ] pinconfig | | | `-- pins pinconfig 35 [ ] pinconfig | | |-- i2c5-1 pinconfig 36 [ ] pinconfig | | | `-- pins pinconfig 37 [ ] pinconfig | | |-- ltdc-a-0 pinconfig 38 [ ] pinconfig | | | `-- pins pinconfig 39 [ ] pinconfig | | |-- ltdc-a-1 pinconfig 40 [ ] pinconfig | | | `-- pins pinconfig 41 [ ] pinconfig | | |-- ltdc-b-0 pinconfig 42 [ ] pinconfig | | | `-- pins pinconfig 43 [ ] pinconfig | | |-- ltdc-b-1 pinconfig 44 [ ] pinconfig | | | `-- pins pinconfig 45 [ ] pinconfig | | |-- m-can1-0 pinconfig 46 [ ] pinconfig | | | |-- pins1 pinconfig 47 [ ] pinconfig | | | `-- pins2 pinconfig 48 [ ] pinconfig | | |-- m_can1-sleep@0 pinconfig 49 [ ] pinconfig | | | `-- pins pinconfig 50 [ ] pinconfig | | |-- pwm2-0 pinconfig 51 [ ] pinconfig | | | `-- pins pinconfig 52 [ ] pinconfig | | |-- pwm8-0 pinconfig 53 [ ] pinconfig | | | `-- pins pinconfig 54 [ ] pinconfig | | |-- pwm12-0 pinconfig 55 [ ] pinconfig | | | `-- pins pinconfig 56 [ ] pinconfig | | |-- qspi-clk-0 pinconfig 57 [ ] pinconfig | | | `-- pins pinconfig 58 [ ] pinconfig | | |-- qspi-bk1-0 pinconfig 59 [ ] pinconfig | | | |-- pins1 pinconfig 60 [ ] pinconfig | | | `-- pins2 pinconfig 61 [ ] pinconfig | | |-- qspi-bk2-0 pinconfig 62 [ ] pinconfig | | | |-- pins1 pinconfig 63 [ ] pinconfig | | | `-- pins2 pinconfig 64 [ + ] pinconfig | | |-- sdmmc1-b4-0 pinconfig 65 [ ] pinconfig | | | `-- pins pinconfig 66 [ ] pinconfig | | |-- sdmmc1-b4-od-0 pinconfig 67 [ ] pinconfig | | | |-- pins1 pinconfig 68 [ ] pinconfig | | | `-- pins2 pinconfig 69 [ ] pinconfig | | |-- sdmmc1-b4-sleep-0 pinconfig 70 [ ] pinconfig | | | `-- pins pinconfig 71 [ + ] pinconfig | | |-- sdmmc1-dir-0 pinconfig 72 [ ] pinconfig | | | |-- pins1 pinconfig 73 [ ] pinconfig | | | `-- pins2 pinconfig 74 [ ] pinconfig | | |-- sdmmc1-dir-sleep-0 pinconfig 75 [ ] pinconfig | | | `-- pins pinconfig 76 [ ] pinconfig | | |-- sdmmc2-b4-0 pinconfig 77 [ ] pinconfig | | | `-- pins pinconfig 78 [ ] pinconfig | | |-- sdmmc2-d47-0 pinconfig 79 [ ] pinconfig | | | `-- pins pinconfig 80 [ ] pinconfig | | |-- spdifrx-0 pinconfig 81 [ ] pinconfig | | | `-- pins pinconfig 82 [ ] pinconfig | | |-- spdifrx-1 pinconfig 83 [ ] pinconfig | | | `-- pins pinconfig 84 [ ] pinconfig | | |-- spi2-0 pinconfig 85 [ ] pinconfig | | | |-- pins1 pinconfig 86 [ ] pinconfig | | | `-- pins2 pinconfig 87 [ ] pinconfig | | |-- stusb1600-0 pinconfig 88 [ ] pinconfig | | | `-- pins pinconfig 89 [ + ] pinconfig | | |-- uart4-0 pinconfig 90 [ ] pinconfig | | | |-- pins1 pinconfig 91 [ ] pinconfig | | | `-- pins2 pinconfig 92 [ ] pinconfig | | |-- uart4-1 pinconfig 93 [ ] pinconfig | | | |-- pins1 pinconfig 94 [ ] pinconfig | | | `-- pins2 pinconfig 95 [ ] pinconfig | | |-- uart7-0 pinconfig 96 [ ] pinconfig | | | |-- pins1 pinconfig 97 [ ] pinconfig | | | `-- pins2 pinconfig 98 [ ] pinconfig | | `-- usbotg_hs-0 pinconfig 99 [ ] pinconfig | | `-- pins pinctrl 1 [ + ] pinctrl_stm32 | |-- pin-controller-z@54004000 gpio 11 [ + ] gpio_stm32 | | |-- gpio@54004000 pinconfig 100 [ + ] pinconfig | | |-- i2c4-0 pinconfig 101 [ ] pinconfig | | | `-- pins pinconfig 102 [ ] pinconfig | | |-- i2c4-1 pinconfig 103 [ ] pinconfig | | | `-- pins pinconfig 104 [ ] pinconfig | | `-- spi1-0 pinconfig 105 [ ] pinconfig | | |-- pins1 pinconfig 106 [ ] pinconfig | | `-- pins2 ram 0 [ ] stm32mp1_ddr | `-- ddr@5A003000 regulator 17 [ + ] gpio regulator |-- regulator-sd_switch led 0 [ + ] gpio_led |-- led led 1 [ + ] gpio_led | |-- red led 2 [ + ] gpio_led | |-- green led 3 [ + ] gpio_led | |-- orange led 4 [ ] gpio_led | `-- blue clk 1 [ + ] fixed_rate_clock |-- clk-hse clk 2 [ + ] fixed_rate_clock |-- clk-hsi clk 3 [ + ] fixed_rate_clock |-- clk-lse clk 4 [ + ] fixed_rate_clock |-- clk-lsi clk 5 [ + ] fixed_rate_clock `-- clk-csi
With the patch only the needed "pinconfig" instances are kept:
STM32MP> dm tree Class Index Probed Driver Name ----------------------------------------------------------- root 0 [ + ] root_driver root_driver sysreset 0 [ ] syscon_reboot |-- reboot simple_bus 0 [ + ] generic_simple_bus |-- soc serial 0 [ + ] serial_stm32 | |-- serial@40010000 i2c 0 [ ] stm32f7-i2c | |-- i2c@40013000 i2c_generi 0 [ ] stmfx | | `-- stmfx@42 i2c 1 [ ] stm32f7-i2c | |-- i2c@40015000 usb 0 [ ] dwc2-udc-otg | |-- usb-otg@49000000 hwspinlock 0 [ + ] hwspinlock_stm32mp1 | |-- hwspinlock@4c000000 mailbox 0 [ ] stm32_ipcc | |-- mailbox@4c001000 misc 0 [ + ] stm32-rcc | |-- rcc@50000000 clk 0 [ + ] stm32mp1_clk | | |-- stm32mp1_clk reset 0 [ + ] stm32_rcc_reset | | `-- stm32_rcc_reset syscon 0 [ + ] stmp32mp_syscon | |-- pwr@50001000 pmic 0 [ + ] stm32mp_pwr_pmic | | `-- pwr-regulators regulator 0 [ + ] stm32mp_pwr_regulato | | |-- reg11 regulator 1 [ + ] stm32mp_pwr_regulato | | |-- reg18 regulator 2 [ + ] stm32mp_pwr_regulato | | `-- usb33 syscon 1 [ ] syscon | |-- interrupt-controller@5000d000 syscon 2 [ + ] stmp32mp_syscon | |-- syscon@50020000 mtd 0 [ + ] stm32_fmc2_nand | |-- nand-controller@58002000 spi 0 [ ] stm32_qspi | |-- spi@58003000 spi_flash 0 [ ] spi_flash_std | | |-- mx66l51235l@0 spi_flash 1 [ ] spi_flash_std | | `-- mx66l51235l@1 mmc 0 [ + ] stm32_sdmmc2 | |-- sdmmc@58005000 blk 0 [ + ] mmc_blk | | `-- sdmmc@58005000.blk mmc 1 [ + ] stm32_sdmmc2 | |-- sdmmc@58007000 blk 1 [ ] mmc_blk | | `-- sdmmc@58007000.blk eth 0 [ + ] eth_eqos | |-- ethernet@5800a000 usb 0 [ ] ehci_generic | |-- usbh-ehci@5800d000 phy 0 [ ] stm32-usbphyc | |-- usbphyc@5a006000 i2c 2 [ + ] stm32f7-i2c | |-- i2c@5c002000 pmic 1 [ + ] stpmic1_pmic | | `-- stpmic@33 regulator 3 [ + ] stpmic1_buck | | |-- buck1 regulator 4 [ + ] stpmic1_buck | | |-- buck2 regulator 5 [ + ] stpmic1_buck | | |-- buck3 regulator 6 [ + ] stpmic1_buck | | |-- buck4 regulator 7 [ + ] stpmic1_ldo | | |-- ldo1 regulator 8 [ + ] stpmic1_ldo | | |-- ldo2 regulator 9 [ + ] stpmic1_ldo | | |-- ldo3 regulator 10 [ + ] stpmic1_ldo | | |-- ldo4 regulator 11 [ + ] stpmic1_ldo | | |-- ldo5 regulator 12 [ + ] stpmic1_ldo | | |-- ldo6 regulator 13 [ + ] stpmic1_vref_ddr | | |-- vref_ddr regulator 14 [ + ] stpmic1_boost | | |-- boost regulator 15 [ + ] stpmic1_pwr_sw | | |-- pwr_sw1 regulator 16 [ + ] stpmic1_pwr_sw | | |-- pwr_sw2 sysreset 1 [ ] stpmic1-sysreset | | `-- stpmic1-sysreset rtc 0 [ ] rtc-stm32 | |-- rtc@5c004000 misc 1 [ + ] stm32mp_bsec | |-- nvmem@5c005000 pinctrl 0 [ + ] pinctrl_stm32 | |-- pin-controller@50002000 gpio 0 [ + ] gpio_stm32 | | |-- gpio@50002000 gpio 1 [ + ] gpio_stm32 | | |-- gpio@50003000 gpio 2 [ + ] gpio_stm32 | | |-- gpio@50004000 gpio 3 [ + ] gpio_stm32 | | |-- gpio@50005000 gpio 4 [ + ] gpio_stm32 | | |-- gpio@50006000 gpio 5 [ + ] gpio_stm32 | | |-- gpio@50007000 gpio 6 [ + ] gpio_stm32 | | |-- gpio@50008000 gpio 7 [ + ] gpio_stm32 | | |-- gpio@50009000 gpio 8 [ ] gpio_stm32 | | |-- gpio@5000a000 gpio 9 [ ] gpio_stm32 | | |-- gpio@5000b000 gpio 10 [ ] gpio_stm32 | | |-- gpio@5000c000 pinconfig 0 [ ] pinconfig | | |-- adc12-usb-pwr-pins-0 pinconfig 1 [ ] pinconfig | | |-- cec-0 pinconfig 2 [ ] pinconfig | | |-- cec-sleep-0 pinconfig 3 [ ] pinconfig | | |-- cec-1 pinconfig 4 [ ] pinconfig | | |-- cec-sleep-1 pinconfig 5 [ + ] pinconfig | | |-- rgmii-0 pinconfig 6 [ ] pinconfig | | |-- rgmii-sleep-0 pinconfig 7 [ + ] pinconfig | | |-- fmc-0 pinconfig 8 [ ] pinconfig | | |-- fmc-sleep-0 pinconfig 9 [ ] pinconfig | | |-- i2c1-0 pinconfig 10 [ ] pinconfig | | |-- i2c1-1 pinconfig 11 [ ] pinconfig | | |-- i2c1-2 pinconfig 12 [ ] pinconfig | | |-- i2c2-0 pinconfig 13 [ ] pinconfig | | |-- i2c2-1 pinconfig 14 [ ] pinconfig | | |-- i2c2-2 pinconfig 15 [ ] pinconfig | | |-- i2c5-0 pinconfig 16 [ ] pinconfig | | |-- i2c5-1 pinconfig 17 [ ] pinconfig | | |-- ltdc-a-0 pinconfig 18 [ ] pinconfig | | |-- ltdc-a-1 pinconfig 19 [ ] pinconfig | | |-- ltdc-b-0 pinconfig 20 [ ] pinconfig | | |-- ltdc-b-1 pinconfig 21 [ ] pinconfig | | |-- m-can1-0 pinconfig 22 [ ] pinconfig | | |-- m_can1-sleep@0 pinconfig 23 [ ] pinconfig | | |-- pwm2-0 pinconfig 24 [ ] pinconfig | | |-- pwm8-0 pinconfig 25 [ ] pinconfig | | |-- pwm12-0 pinconfig 26 [ ] pinconfig | | |-- qspi-clk-0 pinconfig 27 [ ] pinconfig | | |-- qspi-bk1-0 pinconfig 28 [ ] pinconfig | | |-- qspi-bk2-0 pinconfig 29 [ + ] pinconfig | | |-- sdmmc1-b4-0 pinconfig 30 [ ] pinconfig | | |-- sdmmc1-b4-od-0 pinconfig 31 [ ] pinconfig | | |-- sdmmc1-b4-sleep-0 pinconfig 32 [ + ] pinconfig | | |-- sdmmc1-dir-0 pinconfig 33 [ ] pinconfig | | |-- sdmmc1-dir-sleep-0 pinconfig 34 [ ] pinconfig | | |-- sdmmc2-b4-0 pinconfig 35 [ ] pinconfig | | |-- sdmmc2-d47-0 pinconfig 36 [ ] pinconfig | | |-- spdifrx-0 pinconfig 37 [ ] pinconfig | | |-- spdifrx-1 pinconfig 38 [ ] pinconfig | | |-- spi2-0 pinconfig 39 [ ] pinconfig | | |-- stusb1600-0 pinconfig 40 [ + ] pinconfig | | |-- uart4-0 pinconfig 41 [ ] pinconfig | | |-- uart4-1 pinconfig 42 [ ] pinconfig | | |-- uart7-0 pinconfig 43 [ ] pinconfig | | `-- usbotg_hs-0 pinctrl 1 [ + ] pinctrl_stm32 | |-- pin-controller-z@54004000 gpio 11 [ + ] gpio_stm32 | | |-- gpio@54004000 pinconfig 44 [ + ] pinconfig | | |-- i2c4-0 pinconfig 45 [ ] pinconfig | | |-- i2c4-1 pinconfig 46 [ ] pinconfig | | `-- spi1-0 ram 0 [ ] stm32mp1_ddr | `-- ddr@5A003000 regulator 17 [ + ] gpio regulator |-- regulator-sd_switch led 0 [ + ] gpio_led |-- led led 1 [ + ] gpio_led | |-- red led 2 [ + ] gpio_led | |-- green led 3 [ + ] gpio_led | |-- orange led 4 [ ] gpio_led | `-- blue clk 1 [ + ] fixed_rate_clock |-- clk-hse clk 2 [ + ] fixed_rate_clock |-- clk-hsi clk 3 [ + ] fixed_rate_clock |-- clk-lse clk 4 [ + ] fixed_rate_clock |-- clk-lsi clk 5 [ + ] fixed_rate_clock `-- clk-csi
drivers/pinctrl/Kconfig | 25 +++++++++++++++++++++++++ drivers/pinctrl/pinctrl-uclass.c | 2 ++ 2 files changed, 27 insertions(+)
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index a0ac167..deee924 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -59,6 +59,22 @@ config PINCONF This option enables pin configuration through the generic pinctrl framework.
+config PINCONF_RECURSIVE + bool "Support recursive binding for pin configuration nodes" + depends on PINCTRL_FULL + default n if ARCH_STM32MP + default y + help + In the Linux pinctrl binding, the pin configuration nodes need not be + direct children of the pin controller device (may be grandchildren for + example). It is define is each individual pin controller device. + Say Y here if you want to keep this behavior with the pinconfig + u-class: all sub are recursivelly bounded. + If the option is disabled, this behavior is deactivated and only + the direct children of pin controller will be assumed as pin + configuration; you can save memory footprint when this feature is + no needed. + config SPL_PINCTRL bool "Support pin controllers in SPL" depends on SPL && SPL_DM @@ -104,6 +120,15 @@ config SPL_PINCONF This option is an SPL-variant of the PINCONF option. See the help of PINCONF for details.
+config SPL_PINCONF_RECURSIVE + bool "Support recursive binding for pin configuration nodes in SPL" + depends on SPL_PINCTRL_FULL + default n if ARCH_STM32MP + default y + help + This option is an SPL-variant of the PINCONF_RECURSIVE option. + See the help of PINCONF_RECURSIVE for details. + if PINCTRL || SPL_PINCTRL
config PINCTRL_AR933X diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c index 5b1cd29..bf799a7 100644 --- a/drivers/pinctrl/pinctrl-uclass.c +++ b/drivers/pinctrl/pinctrl-uclass.c @@ -151,7 +151,9 @@ static int pinconfig_post_bind(struct udevice *dev)
UCLASS_DRIVER(pinconfig) = { .id = UCLASS_PINCONFIG, +#if CONFIG_IS_ENABLED(PINCONFIG_RECURSIVE) .post_bind = pinconfig_post_bind, +#endif .name = "pinconfig", };