overlays: Rename pi3- overlays to be less model-specific (#3052)

Rename the various pi3- overlays to be more generic, listing
the devices they apply to in the README. The original names are
retained for backwards compatibility as files that just include
the new versions - the README marks them as being deprecated.

See: raspberrypi/firmware#1174

Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

arch/arm/boot/dts/overlays/Makefile

@@ -1,6 +1,7 @@
 # Overlays for the Raspberry Pi platform
 
 dtbo-$(CONFIG_ARCH_BCM2835) += \
+	act-led.dtbo \
 	adau1977-adc.dtbo \
 	adau7002-simple.dtbo \
 	ads1015.dtbo \
@@ -26,6 +27,8 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	dht11.dtbo \
 	dionaudio-loco.dtbo \
 	dionaudio-loco-v2.dtbo \
+	disable-bt.dtbo \
+	disable-wifi.dtbo \
 	dpi18.dtbo \
 	dpi24.dtbo \
 	draws.dtbo \
@@ -91,6 +94,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	media-center.dtbo \
 	midi-uart0.dtbo \
 	midi-uart1.dtbo \
+	miniuart-bt.dtbo \
 	mmc.dtbo \
 	mpu6050.dtbo \
 	mz61581.dtbo \

arch/arm/boot/dts/overlays/README

@@ -180,14 +180,16 @@ Params:
 
         act_led_activelow       Set to "on" to invert the sense of the LED
                                 (default "off")
-                                N.B. For Pi3 see pi3-act-led overlay.
+                                N.B. For Pi 3B, 3B+, 3A+ and 4B, use the act-led
+                                overlay.
 
         act_led_gpio            Set which GPIO to use for the activity LED
                                 (in case you want to connect it to an external
                                 device)
                                 (default "16" on a non-Plus board, "47" on a
                                 Plus or Pi 2)
-                                N.B. For Pi3 see pi3-act-led overlay.
+                                N.B. For Pi 3B, 3B+, 3A+ and 4B, use the act-led
+                                overlay.
 
         pwr_led_trigger
         pwr_led_activelow
@@ -205,6 +207,23 @@ Params:
         and the other i2c baudrate parameters.
 
 
+Name:   act-led
+Info:   Pi 3B, 3B+, 3A+ and 4B use a GPIO expander to drive the LEDs which can
+        only be accessed from the VPU. There is a special driver for this with a
+        separate DT node, which has the unfortunate consequence of breaking the
+        act_led_gpio and act_led_activelow dtparams.
+        This overlay changes the GPIO controller back to the standard one and
+        restores the dtparams.
+Load:   dtoverlay=act-led,<param>=<val>
+Params: activelow               Set to "on" to invert the sense of the LED
+                                (default "off")
+
+        gpio                    Set which GPIO to use for the activity LED
+                                (in case you want to connect it to an external
+                                device)
+                                REQUIRED
+
+
 Name:   adau1977-adc
 Info:   Overlay for activation of ADAU1977 ADC codec over I2C for control
         and I2S for data.
@@ -509,6 +528,21 @@ Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
                                 that does not result in clipping/distortion!)
 
 
+Name:   disable-bt
+Info:   Disable onboard Bluetooth on Pi 3B, 3B+, 3A+, 4B and Zero W, restoring
+        UART0/ttyAMA0 over GPIOs 14 & 15.
+        N.B. To disable the systemd service that initialises the modem so it
+        doesn't use the UART, use 'sudo systemctl disable hciuart'.
+Load:   dtoverlay=disable-bt
+Params: <None>
+
+
+Name:   disable-wifi
+Info:   Disable onboard WiFi on Pi 3B, 3B+, 3A+, 4B and Zero W.
+Load:   dtoverlay=disable-wifi
+Params: <None>
+
+
 Name:   dpi18
 Info:   Overlay for a generic 18-bit DPI display
         This uses GPIOs 0-21 (so no I2C, uart etc.), and activates the output
@@ -1447,6 +1481,20 @@ Load:   dtoverlay=midi-uart1
 Params: <None>
 
 
+Name:   miniuart-bt
+Info:   Switch the onboard Bluetooth function on Pi 3B, 3B+, 3A+, 4B and Zero W
+        to use the mini-UART (ttyS0) and restore UART0/ttyAMA0 over GPIOs 14 &
+        15. Note that this may reduce the maximum usable baudrate.
+        N.B. It is also necessary to edit /lib/systemd/system/hciuart.service
+        and replace ttyAMA0 with ttyS0, unless using Raspbian or another
+        distribution with udev rules that create /dev/serial0 and /dev/serial1,
+        in which case use /dev/serial1 instead because it will always be
+        correct. Furthermore, you must also set core_freq and core_freq_min to
+        the same value in config.txt or the miniuart will not work.
+Load:   dtoverlay=miniuart-bt
+Params: <None>
+
+
 Name:   mmc
 Info:   Selects the bcm2835-mmc SD/MMC driver, optionally with overclock
 Load:   dtoverlay=mmc,<param>=<val>
@@ -1509,48 +1557,27 @@ Params: panel                   Display panel (required):
 
 
 Name:   pi3-act-led
-Info:   Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
-        from the VPU. There is a special driver for this with a separate DT
-        node, which has the unfortunate consequence of breaking the
-        act_led_gpio and act_led_activelow dtparams.
-        This overlay changes the GPIO controller back to the standard one and
-        restores the dtparams.
-Load:   dtoverlay=pi3-act-led,<param>=<val>
-Params: activelow               Set to "on" to invert the sense of the LED
-                                (default "off")
-
-        gpio                    Set which GPIO to use for the activity LED
-                                (in case you want to connect it to an external
-                                device)
-                                REQUIRED
+Info:   This overlay has been renamed act-led, keeping pi3-act-led as an alias
+        for backwards compatibility.
+Load:   <Deprecated>
 
 
 Name:   pi3-disable-bt
-Info:   Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
-        N.B. To disable the systemd service that initialises the modem so it
-        doesn't use the UART, use 'sudo systemctl disable hciuart'.
-Load:   dtoverlay=pi3-disable-bt
-Params: <None>
+Info:   This overlay has been renamed disable-bt, keeping pi3-disable-bt as an
+        alias for backwards compatibility.
+Load:   <Deprecated>
 
 
 Name:   pi3-disable-wifi
-Info:   Disable Pi3 onboard WiFi
-Load:   dtoverlay=pi3-disable-wifi
-Params: <None>
+Info:   This overlay has been renamed disable-wifi, keeping pi3-disable-wifi as
+        an alias for backwards compatibility.
+Load:   <Deprecated>
 
 
 Name:   pi3-miniuart-bt
-Info:   Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
-        UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
-        usable baudrate.
-        N.B. It is also necessary to edit /lib/systemd/system/hciuart.service
-        and replace ttyAMA0 with ttyS0, unless you have a system with udev rules
-        that create /dev/serial0 and /dev/serial1, in which case use
-        /dev/serial1 instead because it will always be correct. Furthermore,
-        you must also set core_freq=250 in config.txt or the miniuart will not
-        work.
-Load:   dtoverlay=pi3-miniuart-bt
-Params: <None>
+Info:   This overlay has been renamed miniuart-bt, keeping pi3-miniuart-bt as
+        an alias for backwards compatibility.
+Load:   <Deprecated>
 
 
 Name:   pibell

arch/arm/boot/dts/overlays/act-led-overlay.dts

@@ -0,0 +1,27 @@
+/dts-v1/;
+/plugin/;
+
+/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
+   from the VPU. There is a special driver for this with a separate DT node,
+   which has the unfortunate consequence of breaking the act_led_gpio and
+   act_led_activelow dtparams.
+
+   This overlay changes the GPIO controller back to the standard one and
+   restores the dtparams.
+*/
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&act_led>;
+		frag0: __overlay__ {
+			gpios = <&gpio 0 0>;
+		};
+	};
+
+	__overrides__ {
+		gpio = <&frag0>,"gpios:4";
+		activelow = <&frag0>,"gpios:8";
+	};
+};

arch/arm/boot/dts/overlays/disable-bt-overlay.dts

@@ -0,0 +1,55 @@
+/dts-v1/;
+/plugin/;
+
+/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
+   To disable the systemd service that initialises the modem so it doesn't use
+   the UART:
+
+       sudo systemctl disable hciuart
+*/
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&uart1>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&uart0>;
+		__overlay__ {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&uart0_pins>;
+		__overlay__ {
+			brcm,pins;
+			brcm,function;
+			brcm,pull;
+		};
+	};
+
+	fragment@3 {
+		target = <&bt_pins>;
+		__overlay__ {
+			brcm,pins;
+			brcm,function;
+			brcm,pull;
+		};
+	};
+
+	fragment@4 {
+		target-path = "/aliases";
+		__overlay__ {
+			serial0 = "/soc/serial@7e201000";
+			serial1 = "/soc/serial@7e215040";
+		};
+	};
+};

arch/arm/boot/dts/overlays/disable-wifi-overlay.dts

@@ -0,0 +1,20 @@
+/dts-v1/;
+/plugin/;
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&mmc>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+
+	fragment@1 {
+		target = <&mmcnr>;
+		__overlay__ {
+			status = "disabled";
+		};
+	};
+};

arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts

@@ -0,0 +1,74 @@
+/dts-v1/;
+/plugin/;
+
+/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
+   UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
+   usable baudrate.
+
+   It is also necessary to edit /lib/systemd/system/hciuart.service and
+   replace ttyAMA0 with ttyS0, unless you have a system with udev rules
+   that create /dev/serial0 and /dev/serial1, in which case use /dev/serial1
+   instead because it will always be correct.
+
+   If cmdline.txt uses the alias serial0 to refer to the user-accessable port
+   then the firmware will replace with the appropriate port whether or not
+   this overlay is used.
+*/
+
+/{
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&uart0>;
+		__overlay__ {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart0_pins>;
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target = <&uart1>;
+		__overlay__ {
+			pinctrl-names = "default";
+			pinctrl-0 = <&uart1_pins &bt_pins &fake_bt_cts>;
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&uart0_pins>;
+		__overlay__ {
+			brcm,pins;
+			brcm,function;
+			brcm,pull;
+		};
+	};
+
+	fragment@3 {
+		target = <&uart1_pins>;
+		__overlay__ {
+			brcm,pins = <32 33>;
+			brcm,function = <2>; /* alt5=UART1 */
+			brcm,pull = <0 2>;
+		};
+	};
+
+	fragment@4 {
+		target = <&gpio>;
+		__overlay__ {
+			fake_bt_cts: fake_bt_cts {
+				brcm,pins = <31>;
+				brcm,function = <1>; /* output */
+			};
+		};
+	};
+
+	fragment@5 {
+		target-path = "/aliases";
+		__overlay__ {
+			serial0 = "/soc/serial@7e201000";
+			serial1 = "/soc/serial@7e215040";
+		};
+	};
+};

arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts

@@ -1,27 +1 @@
-/dts-v1/;
-/plugin/;
-
-/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
-   from the VPU. There is a special driver for this with a separate DT node,
-   which has the unfortunate consequence of breaking the act_led_gpio and
-   act_led_activelow dtparams.
-
-   This overlay changes the GPIO controller back to the standard one and
-   restores the dtparams.
-*/
-
-/{
-	compatible = "brcm,bcm2835";
-
-	fragment@0 {
-		target = <&act_led>;
-		frag0: __overlay__ {
-			gpios = <&gpio 0 0>;
-		};
-	};
-
-	__overrides__ {
-		gpio = <&frag0>,"gpios:4";
-		activelow = <&frag0>,"gpios:8";
-	};
-};
+#include "act-led-overlay.dts"