From 2f50ec585830c6119421966a6b269f192f327a54 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Mon, 11 Apr 2022 14:33:14 +0200 Subject: [PATCH 1/3] Update device-tree.adoc Fix the primary uart according to uart.adoc. --- documentation/asciidoc/computers/configuration/device-tree.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/documentation/asciidoc/computers/configuration/device-tree.adoc b/documentation/asciidoc/computers/configuration/device-tree.adoc index 89c9fb68e..d41bb8712 100644 --- a/documentation/asciidoc/computers/configuration/device-tree.adoc +++ b/documentation/asciidoc/computers/configuration/device-tree.adoc @@ -980,7 +980,7 @@ This sets an (exclusive) limit to the loaded device tree. By default the device If non-zero, turn on some extra logging for the firmware's device tree processing. `enable_uart` -Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then enable_uart defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies core_freq=250 (unless force_turbo=1). In some cases this is a performance hit, so it is off by default. +Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3/4 or Zero W, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then enable_uart defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies core_freq=250 (unless force_turbo=1). In some cases this is a performance hit, so it is off by default. `overlay_prefix` Specifies a subdirectory/prefix from which to load overlays - defaults to "overlays/". Note the trailing "/". If desired you can add something after the final "/" to add a prefix to each file, although this is not likely to be needed. From e9b444809f38d631cd54c9bb6ca4db17d4b80659 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Mon, 11 Apr 2022 15:39:10 +0200 Subject: [PATCH 2/3] Update documentation/asciidoc/computers/configuration/device-tree.adoc Co-authored-by: RuffaloLavoisier --- documentation/asciidoc/computers/configuration/device-tree.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/documentation/asciidoc/computers/configuration/device-tree.adoc b/documentation/asciidoc/computers/configuration/device-tree.adoc index d41bb8712..e38ae2692 100644 --- a/documentation/asciidoc/computers/configuration/device-tree.adoc +++ b/documentation/asciidoc/computers/configuration/device-tree.adoc @@ -980,7 +980,7 @@ This sets an (exclusive) limit to the loaded device tree. By default the device If non-zero, turn on some extra logging for the firmware's device tree processing. `enable_uart` -Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3/4 or Zero W, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then enable_uart defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies core_freq=250 (unless force_turbo=1). In some cases this is a performance hit, so it is off by default. +Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3, 4 and Zero W, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then `enable_uart` defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies `core_freq=250` (unless `force_turbo=1`). In some cases this is a performance hit, so it is off by default. `overlay_prefix` Specifies a subdirectory/prefix from which to load overlays - defaults to "overlays/". Note the trailing "/". If desired you can add something after the final "/" to add a prefix to each file, although this is not likely to be needed. From eebd347bd6b480f4ac69fdadb7c3a4a6e96de140 Mon Sep 17 00:00:00 2001 From: Stefan Agner Date: Tue, 12 Apr 2022 16:39:20 +0200 Subject: [PATCH 3/3] Update documentation/asciidoc/computers/configuration/device-tree.adoc --- documentation/asciidoc/computers/configuration/device-tree.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/documentation/asciidoc/computers/configuration/device-tree.adoc b/documentation/asciidoc/computers/configuration/device-tree.adoc index e38ae2692..7a961173c 100644 --- a/documentation/asciidoc/computers/configuration/device-tree.adoc +++ b/documentation/asciidoc/computers/configuration/device-tree.adoc @@ -980,7 +980,7 @@ This sets an (exclusive) limit to the loaded device tree. By default the device If non-zero, turn on some extra logging for the firmware's device tree processing. `enable_uart` -Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3, 4 and Zero W, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then `enable_uart` defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies `core_freq=250` (unless `force_turbo=1`). In some cases this is a performance hit, so it is off by default. +Enable the primary/console xref:configuration.adoc#configuring-uarts[UART] (ttyS0 on a Raspberry Pi 3, 4, 400, Zero W and Zero 2 W, ttyAMA0 otherwise - unless swapped with an overlay such as miniuart-bt). If the primary UART is ttyAMA0 then `enable_uart` defaults to 1 (enabled), otherwise it defaults to 0 (disabled). This is because it is necessary to stop the core frequency from changing which would make ttyS0 unusable, so `enable_uart=1` implies `core_freq=250` (unless `force_turbo=1`). In some cases this is a performance hit, so it is off by default. `overlay_prefix` Specifies a subdirectory/prefix from which to load overlays - defaults to "overlays/". Note the trailing "/". If desired you can add something after the final "/" to add a prefix to each file, although this is not likely to be needed.