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arm64: dts: meson-g12b-odroid-n2: add SPIFC controller node 

Add disabled SPIFC controller node with instruction on how to enable
it while lowering capabilities of the eMMC controller from 8bits bus
width to 4bits bus width, it's data pins 4 to 7 being shared with
the SPI NOR controller pins.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200313090713.15147-5-narmstrong@baylibre.com
This commit is contained in:
Neil Armstrong 2020-03-13 10:07:13 +01:00 committed by Kevin Hilman
parent 0e1610e726
commit a084eaf309
1 changed files with 21 additions and 0 deletions
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21
arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
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@ -451,6 +451,27 @@
vqmmc-supply = <&flash_1v8>;
};
/*
* EMMC_D4, EMMC_D5, EMMC_D6 and EMMC_D7 pins are shared between SPI NOR pins
* and eMMC Data 4 to 7 pins.
* Replace emmc_data_8b_pins to emmc_data_4b_pins from sd_emmc_c pinctrl-0,
* and change bus-width to 4 then spifc can be enabled.
* The SW1 slide should also be set to the correct position.
*/
&spifc {
status = "disabled";
pinctrl-0 = <&nor_pins>;
pinctrl-names = "default";
mx25u64: spi-flash@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "mxicy,mx25u6435f", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <104000000>;
};
};
&tdmif_b {
status = "okay";
};