The (Qseven) BIOS_DISABLE signal on the RK3399-Q7 (Puma) keeps the eMMC and SPI in reset initially and we need to write a GPIO to turn them on before continuing the boot-up.
This adds the DTS entries for the additional regulator and makes pinctrl and gpio3 available during SPL. It also adds a hook to the spl_board_init() to ensure that the regulator gets probed and enabled.
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com ---
arch/arm/dts/rk3399-puma.dtsi | 23 +++++++++++++++++++++++ board/theobroma-systems/puma_rk3399/puma-rk3399.c | 10 ++++++++++ 2 files changed, 33 insertions(+)
diff --git a/arch/arm/dts/rk3399-puma.dtsi b/arch/arm/dts/rk3399-puma.dtsi index edb9424..85e00ec 100644 --- a/arch/arm/dts/rk3399-puma.dtsi +++ b/arch/arm/dts/rk3399-puma.dtsi @@ -90,6 +90,24 @@ }; };
+ /* + * The Qseven BIOS_DISABLE signal on the RK3399-Q7 keeps the on-module + * eMMC and SPI flash powered-down initially (in fact it keeps the + * reset signal asserted). Even though it is an enable signal, we + * model this as a regulator. + */ + bios_enable: bios_enable { + compatible = "regulator-fixed"; + u-boot,dm-pre-reloc; + regulator-name = "bios_enable"; + enable-active-low; + gpio = <&gpio3 29 GPIO_ACTIVE_HIGH>; + regulator-always-on; + regulator-boot-on; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; + vccadc_ref: vccadc-ref { compatible = "regulator-fixed"; regulator-name = "vcc1v8_sys"; @@ -523,10 +541,15 @@ status = "okay"; };
+&gpio3 { + u-boot,dm-pre-reloc; +}; + &pinctrl { /* Pins that are not explicitely used by any devices */ pinctrl-names = "default"; pinctrl-0 = <&puma_pin_hog>; + hog { puma_pin_hog: puma_pin_hog { rockchip,pins = diff --git a/board/theobroma-systems/puma_rk3399/puma-rk3399.c b/board/theobroma-systems/puma_rk3399/puma-rk3399.c index cc572b5..b49fa66 100644 --- a/board/theobroma-systems/puma_rk3399/puma-rk3399.c +++ b/board/theobroma-systems/puma_rk3399/puma-rk3399.c @@ -34,6 +34,16 @@ int board_init(void)
void spl_board_init(void) { + int ret; + + /* + * Turning the eMMC and SPI back on (if disabled via the Qseven + * BIOS_ENABLE) signal is done through a always-on regulator). + */ + ret = regulators_enable_boot_on(false); + if (ret) + debug("%s: Cannot enable boot on regulator\n", __func__); + preloader_console_init(); return; }