From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f54.google.com (mail-wm1-f54.google.com [209.85.128.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0472E425CC9 for ; Wed, 29 Apr 2026 19:14:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777490072; cv=none; b=GQSVVHR9Bnrmjce20+YUWEVZQn4nWBt12jonLMBHeiD9CIHfSDG7LdsOG+pTL4g8QWlG38Qs5Tphi5cghxAKXbFRhzOHM4GL+JBGRlDWo/i5VTXaJVOX4brgnNT4/pbWeigekhXyW71alkUmmyni5VuHpw+wJvPPFmX+30qSXfc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777490072; c=relaxed/simple; bh=OFELZprfvGMngJiiwTNQcz/opzneDKzuYgSzdRQRbGE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=JpYX0k2PQmC+QS0mi4rMq5AOw3cxZbL+IT2U3sxT+QGI5R8uIV5tPiU+fJ/m0ELcNGd1P81AitSgcqYVjEd9imvPrEOHyOEVoqQvYAhS32gOIatfbhq4SzoPu3NCKFw3RvldzaxtwojGWucSYSnnGr4xW2avQXw4EtqsysjSYW4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=G/zf9yje; arc=none smtp.client-ip=209.85.128.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="G/zf9yje" Received: by mail-wm1-f54.google.com with SMTP id 5b1f17b1804b1-48a7fe4f40bso1149185e9.0 for ; Wed, 29 Apr 2026 12:14:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1777490067; x=1778094867; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=LkcOvOZZBBJ6rw+XBoAkJNNzNDgTfzBSBc4KLO3hr2I=; b=G/zf9yjeagLTiNgf6bSM5KSNQ0D+WwKDjEJ3VqR7j9DHbqEiBQvyY/HM+JybJ9aAda hV1Oy5POy/usigKepZknhPQZSTn8/LJvuqH2unBNhRQ3ISFmqpf/fKhqwkKJ1dLB/Mp4 sC+2eSLACT0K5xyc42hE76dl1+NncI8Dq48NBDCaM+pf1ugOFExwd+nUJtf8PYKb2Kim 1gjydcXHwAzl8L6ziKlAxp0fKe/LiR3hXUX7lNlRzX3mb03zxVsioCvXiszgG7m4GeKD JzOoMP+zjoEWC+9wIKXmmUP6V86MAOBDpuvTAtMU3d8Q9VCT/AX5lmHs2EKHUWJUsL3/ UK7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777490067; x=1778094867; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=LkcOvOZZBBJ6rw+XBoAkJNNzNDgTfzBSBc4KLO3hr2I=; b=KlmS+lMhnmZcsfoXKwzEy2yr80Sybv+iTVO2fZsziqqhHfp08JhRVEb9OSe9VY8CBD L4mPUH+uwWHlg7VAa27ww5t295zh4XOmPcVA/mmP2JcJSE1K6NHR6K/oILTK0FL1RVvI laOkKa7pcZXsTL6iVpYKVc2jSBnZHzyiZTaxaScuwojVBsB6PDjn8q9V6Rs0GNoJj5ZO YZBe05/l+JXgBjLpMa1EsOByVaHNApOSPz5G4w8UQ9AzmSJaRFINaKug5vcWFtSoz4mX SIeGbge5+GDUPriIdZrE8csv2NHYmF4PhLkmaun+7ASejTcNmSJwEScU321w6N7OJwcQ TSwA== X-Forwarded-Encrypted: i=1; AFNElJ8RGh3syuLa/JHsX/jZFdZ+gFXH8hEaJQl3Aw4WYT3cORxFAUdVlFy43T1IYppPN813Wz6sG6tYKbt2@vger.kernel.org X-Gm-Message-State: AOJu0YwCtrMBVAWzbZ6g66wqzlXaZ1WPOVfi/B4D0PRm8yJO/frsBbou W7rppx3T5ALHKf+QEghdcs8fpQNf65n5NwY62opupZA7eSGpewWTyZIJ X-Gm-Gg: AeBDietkO8rU13OYOKzm/21EMJDwn9Aim2pxMGx+0QcdXAjAeblt3fDyf5ogXSzIgTX jKiPAv1sdlJbBRTCKu8Hl8F1XNRLwKrrTM1bAGDRDc2Au8jXmZwVNFjFE1QFbAHRKPZkGOd4Wtq R9ALzt+p1Cc+33DLVjqWt6j6FjDmxsN59U+mUE6lcStA9aeofYUEsxNw2rtZOc+7yuqkhEzAbG6 1CuG9Rh//hdKcc61atV6ZIaDFNCqiIiKy+E5nM5T4VClAiSf/Z7pTJUc1l2bZFjHk+H7Egyn2lr We+uFw3mmWqPKTJ9HLK4tDsou1faDypMnhXdKjY41s+78EH/zVO/v8CYe7qBATWM1/7xCmciJZe j6dVWXerCf2+/5RRbw/OHmvQp+ddPAHsxA4A/qvaSuHqG6zieE0q+XRhd1kUn62aTT+f9ZHFVA/ 6REE+oEMm7vQsf+EOxAcFI1Fk1HrQZZraOAsqB53+nH7o= X-Received: by 2002:a05:600c:c4ac:b0:48a:72ab:f88c with SMTP id 5b1f17b1804b1-48a7b531966mr84488605e9.17.1777490066947; Wed, 29 Apr 2026 12:14:26 -0700 (PDT) Received: from [192.168.0.2] ([197.250.51.50]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a7c316d7esm23315005e9.24.2026.04.29.12.14.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 12:14:26 -0700 (PDT) From: =?utf-8?q?Stefan_D=C3=B6singer?= Date: Wed, 29 Apr 2026 22:13:15 +0300 Subject: [PATCH v7 4/6] amba/serial: amba-pl011: Bring back zx29 UART support Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260429-send-v7-4-b432e00d2db8@gmail.com> References: <20260429-send-v7-0-b432e00d2db8@gmail.com> In-Reply-To: <20260429-send-v7-0-b432e00d2db8@gmail.com> To: Jonathan Corbet , Shuah Khan , Russell King , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Arnd Bergmann , Krzysztof Kozlowski , Alexandre Belloni , Linus Walleij , Drew Fustini , Greg Kroah-Hartman , Jiri Slaby Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, soc@lists.linux.dev, linux-serial@vger.kernel.org, =?utf-8?q?Stefan_D=C3=B6singer?= X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=2247; i=stefandoesinger@gmail.com; h=from:subject:message-id; bh=OFELZprfvGMngJiiwTNQcz/opzneDKzuYgSzdRQRbGE=; b=owEBiQJ2/ZANAwAIAT0TvMhUTxoiAcsmYgBp8lh1w5z33TZAF5+1T30Qwz8S7JO6ytEAYV3FR q8rCJM03hqJAk8EAAEIADkWIQRDFvS2qgVbJ5UyXWw9E7zIVE8aIgUCafJYdRsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQPRO8yFRPGiK9qA/8DlDCl2L85oAjJdHuvdMuhm2cJ1nBxA2 avmcsgKIetHjmqNpP2zk44VFNS0dvdbyQb6XCWZlJSB57i/DMG7Nrsa7S64wEgA8Y+6D5Qghn2+ 5t5t45tmsS9zRNhQ5D2L65vq+NlrBjMsLJkgTM7LqY/pa0eu4en+6m1yHzsCR4bSsNUNvUGRqUS cilD+V8lYukNNOVNqI+N4hLap2VQ7Imy2OiCfb2pYMMKrHCQWTI0ddPGoK96O3iS3lhPpapDw8e IfSUgNKcut7khIXfSbo9XjinyTCVA/c+1YtZGccPu1QaBY/BJUVCmtXQkrMUkdJbZbLSrZZqLTV WwYoEqc4ncyISaPD0WKxhMReXZgOPltignhMr+V1pFTgAifaBDcjkUX9ntUWkzhVHFikhfxXHSf MiAyq2OacP6I6AnNKaoZ7D+7qRZzrNaMIsha2atpd+e+ZfyzyFQWIdGNinY1g3XxrI4OmkCXf9d 3kGa4F+MPE6ixR4HZTp+D0Uxk2UM5tE5CKOnZjBgU8ujQ/3yRIIRT3vgOs5Xp1HFMDkHmnTKeW+ QnQ2JAVva/sKSGsFSLkndoiiTS8H/gfPrPP+XFjTXkEX6rrfeRhdqWW82AJNEvKloPoUWF40y3s cquVgQ4HLe54W/tgOpl04w/5zr4hv6CyqdSxxvBnxer7zeoY+O5U= X-Developer-Key: i=stefandoesinger@gmail.com; a=openpgp; fpr=4F9C2C8728019633893EBBB98CB81F9A72BBA155 This is based on code removed in commit 89d4f98ae90d ("ARM: remove zte zx platform"). I did not bring back the zx29-uart .compatible as the arm,primecell-periphid does the job. Reviewed-by: Linus Walleij Signed-off-by: Stefan Dösinger --- Changes since v4: Use ZTE's JEDEC ID instead of 0xfe for the DT-Provided AMBA ID. --- drivers/tty/serial/amba-pl011.c | 42 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 7f17d288c807..f24cc403d9e0 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -216,6 +216,38 @@ static struct vendor_data vendor_st = { .get_fifosize = get_fifosize_st, }; +static const u16 pl011_zte_offsets[REG_ARRAY_SIZE] = { + [REG_DR] = ZX_UART011_DR, + [REG_FR] = ZX_UART011_FR, + [REG_LCRH_RX] = ZX_UART011_LCRH, + [REG_LCRH_TX] = ZX_UART011_LCRH, + [REG_IBRD] = ZX_UART011_IBRD, + [REG_FBRD] = ZX_UART011_FBRD, + [REG_CR] = ZX_UART011_CR, + [REG_IFLS] = ZX_UART011_IFLS, + [REG_IMSC] = ZX_UART011_IMSC, + [REG_RIS] = ZX_UART011_RIS, + [REG_MIS] = ZX_UART011_MIS, + [REG_ICR] = ZX_UART011_ICR, + [REG_DMACR] = ZX_UART011_DMACR, +}; + +static unsigned int get_fifosize_zte(struct amba_device *dev) +{ + return 16; +} + +static struct vendor_data vendor_zte = { + .reg_offset = pl011_zte_offsets, + .access_32b = true, + .ifls = UART011_IFLS_RX4_8 | UART011_IFLS_TX4_8, + .fr_busy = ZX_UART01x_FR_BUSY, + .fr_dsr = ZX_UART01x_FR_DSR, + .fr_cts = ZX_UART01x_FR_CTS, + .fr_ri = ZX_UART011_FR_RI, + .get_fifosize = get_fifosize_zte, +}; + /* Deals with DMA transactions */ struct pl011_dmabuf { @@ -3081,6 +3113,16 @@ static const struct amba_id pl011_ids[] = { .mask = 0x00ffffff, .data = &vendor_st, }, + { + /* This is an invented ID. The actual hardware that contains + * these ZTE UARTs (zx29 boards) has no AMBA PIDs stored. ZTE + * JEDEC ID (ignoring banks) and the "011" part number as used + * by ARM. + */ + .id = 0x0008c011, + .mask = 0x000fffff, + .data = &vendor_zte, + }, { 0, 0 }, }; -- 2.53.0