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arm64: dts: allwinner: a64: Split out data strobe pin from mmc2 pinmux

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The eMMC 5.0 standard introduced the data strobe (DS) pin. This pin is
not used for pre-5.0 data modes, nor is it found on pre-5.0 eMMC chips.
On the A64, this pin is muxed with spi0's MISO pin. If the DS pin is
included in the mmc2 pinmux by default, this wil prevent the usage
of both mmc2 and spi0 together.

Instead, split out the DS pin to a separate pinmux that only gets used
by boards that actually have it wired up. Currently supported ones
include the Bananapi M64 and Pine64 Pinebook. These are fixed up.

Fixes: a3e8f49262 ("arm64: allwinner: a64: Add MMC pinctrl nodes")
Fixes: b8bcf0e1b2 ("arm64: allwinner: add BananaPi-M64 support")
Fixes: df35fbcfa3 ("arm64: dts: allwinner: add support for Pinebook")
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
This commit is contained in:
Chen-Yu Tsai 2018-08-28 18:01:30 +08:00
parent 3e9429efb7
commit fa59dd2ef7
3 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts
View File

@ -151,7 +151,7 @@ brcmf: wifi@1 {
&mmc2 {
pinctrl-names = "default";
pinctrl-0 = <&mmc2_pins>;
pinctrl-0 = <&mmc2_pins>, <&mmc2_ds_pin>;
vmmc-supply = <&reg_dcdc1>;
bus-width = <8>;
non-removable;

2
arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
View File

@ -103,7 +103,7 @@ rtl8723cs: wifi@1 {
&mmc2 {
pinctrl-names = "default";
pinctrl-0 = <&mmc2_pins>;
pinctrl-0 = <&mmc2_pins>, <&mmc2_ds_pin>;
vmmc-supply = <&reg_dcdc1>;
vqmmc-supply = <&reg_eldo1>;
bus-width = <8>;

9
arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
View File

@ -413,7 +413,7 @@ mmc1_pins: mmc1-pins {
};
mmc2_pins: mmc2-pins {
pins = "PC1", "PC5", "PC6", "PC8", "PC9",
pins = "PC5", "PC6", "PC8", "PC9",
"PC10","PC11", "PC12", "PC13",
"PC14", "PC15", "PC16";
function = "mmc2";
@ -421,6 +421,13 @@ mmc2_pins: mmc2-pins {
bias-pull-up;
};
mmc2_ds_pin: mmc2-ds-pin {
pins = "PC1";
function = "mmc2";
drive-strength = <30>;
bias-pull-up;
};
pwm_pin: pwm_pin {
pins = "PD22";
function = "pwm";