Skip to content

overlays: Fix sc16is752-spi1 emulation #6996

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
pelwell merged 1 commit into from
Aug 13, 2025
Merged

overlays: Fix sc16is752-spi1 emulation #6996

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion arch/arm/boot/dts/overlays/README
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4543,7 +4543,7 @@ Load: <Deprecated>

Name: sc16is752-spi1
Info: This overlay is now deprecated. Use
"dtoverlay=sc16is75x-spi,sc16is752,spi1-0,..." instead.
"dtoverlay=sc16is75x-spi,sc16is752,spi1-1cs,spi1-0,..." instead.
Load: <Deprecated>


Expand All @@ -4558,6 +4558,8 @@ Params: sc16is750 Device is a SC16IS750 UART (default on)
(boolean, required)
int_pin GPIO used for IRQ (default 24)
xtal On-board crystal frequency (default 14745600)
spi1-1cs A special case to support sc16is752-spi1. Not
intended for general use.


Name: sdhost
Expand Down
6 changes: 1 addition & 5 deletions arch/arm/boot/dts/overlays/overlay_map.dts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -292,16 +292,12 @@
renamed = "sc16is75x-spi,sc16is750,spi0-0";
};

sc16is750-spi1 {
renamed = "sc16is75x-spi,sc16is750,spi1-0";
};

sc16is752-spi0 {
renamed = "sc16is75x-spi,sc16is752,spi0-0";
};

sc16is752-spi1 {
renamed = "sc16is75x-spi,sc16is752,spi1-0";
renamed = "sc16is75x-spi,sc16is752,spi1-1cs,spi1-0";
};

sdhost {
Expand Down
37 changes: 36 additions & 1 deletion arch/arm/boot/dts/overlays/sc16is75x-spi-overlay.dts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,14 +53,48 @@
fragment@3 {
target = <&gpio>;
__overlay__ {
sc16is75x_pins: sc16is75x_pins@24 {
sc16is75x_pins: sc16is75x_pins@18 {
brcm,pins = <24>;
brcm,function = <BCM2835_FSEL_GPIO_IN>;
brcm,pull = <BCM2835_PUD_OFF>;
};
};
};

fragment@4 {
target = <&gpio>;
__dormant__ {
spi1_pins: spi1_pins {
brcm,pins = <19 20 21>;
brcm,function = <3>; /* alt4 */
};

spi1_cs_pins: spi1_cs_pins {
brcm,pins = <18>;
brcm,function = <1>; /* output */
};
};
};

fragment@5 {
target = <&spi1>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins &spi1_cs_pins>;
cs-gpios = <&gpio 18 1>;
status = "okay";
};
};

fragment@6 {
target = <&aux>;
__dormant__ {
status = "okay";
};
};

__overrides__ {
sc16is750 = <&sc16is75x>,"compatible=nxp,sc16is750",
<&sc16is75x>, "name=sc16is750@0";
Expand All @@ -80,6 +114,7 @@
spi1-0 = <0>, "-0",
<&sc16is75x_frag>, "target:0=", <&spi1>,
<&sc16is75x_pins>, "name=sc16is75x_spi1_0_pins";
spi1-1cs = <0>,"+4+5+6";
spi1-1 = <0>, "-0",
<&sc16is75x_frag>, "target:0=", <&spi1>,
<&sc16is75x>, "reg:0=1",
Expand Down
Loading