I am trying to port U-Boot to a new product based on a Renesas RZ/G2M (rcar-gen3). We're have this working with Renesas' version from 2018.09, but I am trying to integrate it with U-Boot 2020.07-rc4
What's happening is that it seems like all GPIO are failing to be requested, so things like regulator-gpio fail, reset-gpios, etc. all return errors.
The dm tree and gpio status commands all appear to show gpio banks are enumerating, but since nothing can use the GPIO's it seems like the common thread is the gpio driver for the rcar3.
I was hoping someone might have some thoughts of things I could try or investigate. In order to properly set the voltage for the MMC card, I need "regulator-gpio" to operate correctly.
The gpio regulator node looks like:
vccq_sdhi0: regulator-vccq-sdhi0 { compatible = "regulator-gpio";
regulator-name = "SDHI0 VccQ"; regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>;
gpios = <&gpio6 30 GPIO_ACTIVE_HIGH>; gpios-states = <1>; states = <3300000 1>, <1800000 0>; regulator-always-on; };
Log Below with some debugging turned on.
U-Boot 2020.07-rc4-00060-g9cb895203a-dirty (Jun 18 2020 - 15:27:00 -0500)
CPU: Renesas Electronics R8A7796 rev 2.1 Model: Beacon Embedded Works RZ/G2M Development Kit DRAM: 3.9 GiB Bank #0: 0x048000000 - 0x0bfffffff, 1.9 GiB Bank #1: 0x600000000 - 0x67fffffff, 2 GiB
MMC: gpio_request_tail: dm_gpio_requestf failed gpio_request_tail: Node 'regulator-vccq-sdhi0', property 'gpios', failed to request GPIO index 0: -19 regulator gpio - not found! Error: -19gpio_request_tail: Node 'regulator-vccq-sdhi0', property 'enable-gpios', failed to request GPIO index 0: -2 gpio@e6055400: set_value: error: gpio gpio@e605540030 not reserved Can't set regulator-gpio : regulator-vccq-sdhi0 gpio to: 1 gpio_request_tail: Node 'regulator0', property 'gpio', failed to request GPIO index 0: -2 sd@ee100000: 0, sd@ee160000: 1 Loading Environment from MMC... gpio_request_tail: Node 'regulator1', property 'gpio', failed to request GPIO index 0: -2 OK In: serial@e6e88000 Out: serial@e6e88000 Err: serial@e6e88000 Net: gpio_request_tail: dm_gpio_requestf failed gpio_request_tail: Node 'ethernet-phy@0', property 'reset-gpios', failed to request GPIO index 0: -19 gpio@e6052000: set_value: error: gpio gpio@e605200010 not reserved gpio@e6052000: set_value: error: gpio gpio@e605200010 not reserved
Error: ethernet@e6800000 address not set. No ethernet found.
Hit any key to stop autoboot: 0 =>