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GET /api/1.2/patches/2207115/?format=api
{ "id": 2207115, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2207115/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260309023234.640209-1-daniel@0x0f.com/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/1.2/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260309023234.640209-1-daniel@0x0f.com>", "list_archive_url": null, "date": "2026-03-09T02:32:34", "name": "serial: goldfish: Add DEBUG_UART support", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "8c67f6d26e1c2438830af75e197faaef4a3c7713", "submitter": { "id": 74011, "url": "http://patchwork.ozlabs.org/api/1.2/people/74011/?format=api", "name": "Daniel Palmer", "email": "daniel@0x0f.com" }, "delegate": { "id": 14103, "url": "http://patchwork.ozlabs.org/api/1.2/users/14103/?format=api", "username": "spectrum", "first_name": "Angelo", "last_name": "Dureghello", "email": "sysamfw@gmail.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260309023234.640209-1-daniel@0x0f.com/mbox/", "series": [ { "id": 494936, "url": "http://patchwork.ozlabs.org/api/1.2/series/494936/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=494936", "date": "2026-03-09T02:32:34", "name": "serial: goldfish: Add DEBUG_UART support", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/494936/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2207115/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2207115/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=0x0f.com header.i=@0x0f.com header.a=rsa-sha256\n header.s=google header.b=LgUFo6Nh;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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a=rsa-sha256; c=relaxed/relaxed;\n d=0x0f.com; s=google; t=1773023593; x=1773628393; darn=lists.denx.de;\n h=content-transfer-encoding:mime-version:message-id:date:subject:cc\n :to:from:from:to:cc:subject:date:message-id:reply-to;\n bh=Tr0GZ6OYcnyElUR8KXyH//zJbM8C3Lpxzg5eES+9eh0=;\n b=LgUFo6NhOw/bwXZopg+olQlrCydPLA+FwdpTtUGJEQZ5PuvfTM9VZ8LSJ0dVbs6rrp\n ClFR6Kt5sHPcYYabMyQ3ykl+r4qO5nZ6pj606Yh0K0qwFBx4zHyiH9nBDObmxaVvtGsS\n wvqYrweFhJB0QGEXyox+e8DS/r/F6cqn1EmVM=", "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20230601; t=1773023593; x=1773628393;\n h=content-transfer-encoding:mime-version:message-id:date:subject:cc\n :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date\n :message-id:reply-to;\n bh=Tr0GZ6OYcnyElUR8KXyH//zJbM8C3Lpxzg5eES+9eh0=;\n b=QnrOiuOnmt/ud99eQgiwkZSfvr19pyT7m1tAqUGxyztTfvqcuvVk6CJl4pN+ukr2Yc\n rc8erPpr5jScidN8kSrl39uTyUrchhcydlj8i8dQO4zabCD2eyZgsQBssGOnLJPbUSTq\n 4oGVMawfL677NYgvFZTCf8NzerKS0PhCyXYrFOtDovn52WdSsBvQbhqQ2gFqSffr1SvB\n 4/hK3LGKHtC+u4LC6rfwpIDdSiVdhlPWBz+sx5tvLmY+hTkFZpaQwlf83GIC3b7yBdoR\n 1vIjKsLWT4DquVCGnAabC7WOqsFIJbOtQCv4q5TSOAIb1qsncYvVUTb+H7d2C9H4cFvY\n IGLg==", "X-Gm-Message-State": "AOJu0Yybj2m50RU/krcsOsJUxp4+bUbJFMTQoTKsG3bOBw7QsLlOl+gG\n BhIwo6TrFUdb3aiv8ekxeZMTzXt+pusAA2i+QKWI5j8bdZwIV0hg8tchI6ZVxgW3+nE=", "X-Gm-Gg": "ATEYQzxwV1Oyz6miL2v8xx23yeTTBWZ7RqqjM2sntBt6UyJsPyRZ7vDXcE4BWDlBdUG\n B+TxxQ3l43hw5VmhOE/R9jHVTbK+siJ+2kb5KSmYTtHNnvmQxd7LnR6+uJdxuXcYbxlU4rNoLT9\n gTdl46kZ/HJCxIYnvh/wy+k/cRNBAzpsMkxHMfHL0GWUJhjdKvvXJ3/9KamOteEbSyHQzXRcVfj\n EKP/aG9SbS62rwre2O6Q6VNcp8/iB/VH5HvtGtRxdazGqwFlbdanHSHRXNX0ISs7GUW/t7kymHO\n M5LbpV802jYQIQML7cLBdNJYIPgC5ER9U57ExQrNRiHVyy8j7xpHgOpWd/2eFBhKFv1tH3DKvvA\n 8MQ4wTXJq9Is/qfts0eO7JcSVnbVgnZMLx3O1CmNCiQSzXbuFb/6x/6uU5bC7tsphnnogxT0xsT\n fSKbwQDn6WXmQd25pqt9o4VtLgQ3a3GMPdcyUg1qDM1XnBUiEXkHNAZ7H0Tf1gJErVCiUOE7sSc\n fPR", "X-Received": "by 2002:a17:90b:1dcb:b0:359:85b0:4023 with SMTP id\n 98e67ed59e1d1-359be394911mr7475029a91.16.1773023593339;\n Sun, 08 Mar 2026 19:33:13 -0700 (PDT)", "From": "Daniel Palmer <daniel@0x0f.com>", "To": "visitorckw@gmail.com", "Cc": "u-boot@lists.denx.de,\n\tDaniel Palmer <daniel@0x0f.com>", "Subject": "[PATCH] serial: goldfish: Add DEBUG_UART support", "Date": "Mon, 9 Mar 2026 11:32:34 +0900", "Message-ID": "<20260309023234.640209-1-daniel@0x0f.com>", "X-Mailer": "git-send-email 2.51.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "Add debug support for the goldfish tty so it can be used for\nearly debugging. This will be really useful when adding support\nfor relocation etc.\n\nSigned-off-by: Daniel Palmer <daniel@0x0f.com>\n---\n doc/board/emulation/qemu-m68k.rst | 10 ++++++++++\n drivers/serial/Kconfig | 8 ++++++++\n drivers/serial/serial_goldfish.c | 18 ++++++++++++++++++\n 3 files changed, 36 insertions(+)", "diff": "diff --git a/doc/board/emulation/qemu-m68k.rst b/doc/board/emulation/qemu-m68k.rst\nindex 6c4de54cf6a8..2f2e6bd6444a 100644\n--- a/doc/board/emulation/qemu-m68k.rst\n+++ b/doc/board/emulation/qemu-m68k.rst\n@@ -31,6 +31,16 @@ The minimal QEMU command line to get U-Boot up and running is:\n Note that the `-nographic` option is used to redirect the console to stdio,\n which connects to the emulated Goldfish TTY device.\n \n+Debugging U-Boot\n+----------------\n+\n+If you need early debugging output enable `CONFIG_DEBUG_UART_GOLDFISH`.\n+The base address for the UART can be found by activating the QEMU monitor,\n+running `info qtree`, and then looking for the goldfish tty device and\n+taking the mmio address.\n+\n+Baud rate doesn't matter.\n+\n Hardware Support\n ----------------\n The following QEMU virt peripherals are supported in U-Boot:\ndiff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig\nindex b84cb9ec781d..f6a696e6c94c 100644\n--- a/drivers/serial/Kconfig\n+++ b/drivers/serial/Kconfig\n@@ -510,6 +510,14 @@ config DEBUG_UART_XTENSA_SEMIHOSTING\n \t start up driver model. The driver will be available until the real\n \t driver model serial is running.\n \n+config DEBUG_UART_GOLDFISH\n+\tbool \"Goldfish TTY\"\n+\thelp\n+\t Select this to enable the debug UART using the Goldfish TTY driver.\n+\t This provides basic serial output from the console without needing to\n+\t start up driver model. The driver will be available until the real\n+\t driver model serial is running.\n+\n endchoice\n \n config DEBUG_UART_BASE\ndiff --git a/drivers/serial/serial_goldfish.c b/drivers/serial/serial_goldfish.c\nindex 4ac2cfb62315..58c494918786 100644\n--- a/drivers/serial/serial_goldfish.c\n+++ b/drivers/serial/serial_goldfish.c\n@@ -115,3 +115,21 @@ U_BOOT_DRIVER(serial_goldfish) = {\n \t.priv_auto = sizeof(struct goldfish_tty_priv),\n \t.flags\t= DM_FLAG_PRE_RELOC,\n };\n+\n+#ifdef CONFIG_DEBUG_UART_GOLDFISH\n+\n+#include <debug_uart.h>\n+\n+static inline void _debug_uart_init(void)\n+{\n+}\n+\n+static inline void _debug_uart_putc(int ch)\n+{\n+\tvoid *base = (void *)CONFIG_DEBUG_UART_BASE;\n+\n+\t__raw_writel(ch, base + GOLDFISH_TTY_PUT_CHAR);\n+}\n+\n+DEBUG_UART_FUNCS\n+#endif\n", "prefixes": [] }