From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f53.google.com (mail-wr1-f53.google.com [209.85.221.53]) (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 52E6833ADBA for ; Wed, 6 May 2026 19:34:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778096060; cv=none; b=cQzTh7e4HUyajjkuK7TF5ia0DGBu9bas2WY9wdbVmzB9dh5jBIBJhf7Hh5IlMvY6yQnKz0hDZygL3aqbukfnlbfHJX1PfcMJ3LxbHpkt6W8y5wgK2MY/Jha6NaW5VzVmb+Ao9me11sLS1faKHZxM2OFU0V2dvt2tknKGgmQT3PY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778096060; c=relaxed/simple; bh=OFELZprfvGMngJiiwTNQcz/opzneDKzuYgSzdRQRbGE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UvYEBKUwVRlnQ+uVnFEtmIfjQ0wZpFFV66mtUwah2eHIDxC5siogOCoN2t2pKzpfyoQSG4+NNvd1u1ol0cd+FfUlc/eNeUOYLcUPAKPgH+ARceGw7ChlS3ChXiVQGEmL/qkIiloJ5f7rqlB6xp+1b0pfjcqdaS4Afyd0DURlNmI= 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=BvXIWN0H; arc=none smtp.client-ip=209.85.221.53 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="BvXIWN0H" Received: by mail-wr1-f53.google.com with SMTP id ffacd0b85a97d-43d7645adbdso54217f8f.1 for ; Wed, 06 May 2026 12:34:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1778096051; x=1778700851; 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=BvXIWN0Hp7tcLVz2GNZ2iWw71AB9ju+Hkwm/Ysa1HW05LIcDNUtMnAhfp25GDljgeE isvweMyg4P/aBEQo74H10z2T2qxXr0O6E/+xNti5X7pr9zCX/8Xef4mKMcb8d0EulVOb i25U+16K+5rSbDxKCRAHZh8nk1JtHoFLhEFvzO+kBLAzQHWH4LB6mHbdqIrjQOxhJkvo 2AMvIpgFSTHIKTE8CRGbzBL2ol+WdgD5c3FvK2QNTPDch3zjTWwDBOWK/MimPsCrqk/W aazJ4oHFGB/Z5OwRmjemabRVty/DhLR83ak/6yD08RY3eJw7l5hhTsdTP/UwI8EvXPPc mQqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778096051; x=1778700851; 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=eCh8i3L8iAXZxFMgde+iQzy/QytQfU7i5EHvpP5WYypXPDQHF39eFYdtndy/C7hii9 ItAVTW0+1hX8duXddH6xDXqi52BSPMoIFNE/10aK1Qlp6Xo7LTs7wwDVeQeOYGXb4bdj rkfehNp7cCNYs+Bems7CIguwHNXwpPe9vw546GMDpjn2zjlkVlpFcezxgNaYJs0oSbxU 6OuTAAoclWHzL7jEy+QzsEDot9ElHdZ1FlxCuxRMBOSaYT1/oLBk9Op93/RbTscIeQ4b ppJSycjqrMZz8YRiiQiuPeDUmHm2VzN+p64UBonVtXh56lAXWT2Xipdg9TwnkqSM+R6u Y2Tw== X-Forwarded-Encrypted: i=1; AFNElJ8PnFHOC/FZMxBYXDdzK3TGhFjW/bHNbQDdorsDwsfeEHTniZ5WRu761yqwQk0+z++8p7sPRHkXKum0@vger.kernel.org X-Gm-Message-State: AOJu0YyX1PQef3Qkv6tsQdljQ8xeh2zzKGJcw0+Dw5H61YMCDmmBCO2f rW16VQaN70XYCJqbE89N971AcZ1xl2Mb0IKieJ8juteYCAoV2azbUh49 X-Gm-Gg: AeBDieucIDKSiFlVf9PHFKXBo1PqflRWXk2aYO2Aat5xqdJ42DGNgrzfE6s2PuxVpEE aq8uHO/bfNGS3oUDyEawGuTfOXEZH+82dMQiPQOHgWwGkebmhrcGEdsqlUxXH5oNnBqOFsf77wC n1hfD3MmFu3LoxohqHkUQwvMRFUfMkOwNmcTXKzNlK1gqFqWc+3M/skk8xSXrEg4Wg1ed4zAaaq x9ulY33OuAhV4aT2GYaXlg7Qsx7o/Na/rh9xj5EuLOWk87VP4chJbAoslCv4Gfz+2iRXVCWl3nq YKw8ZB1k9vQmai6Kqu8jjOGKQNTlq93b7Bo9fi2pFQwrXzZANDm+jElp9OThrVAx5fa3kXii91U /gIbGamKd3oAs5YYCe+ojwtu61YJaW/teo48FCkscfR9FOQR/gOQGvzWJAPBaH8kbMk0xh1kDDI qi1vclo7KJ7tbyGt/HxJRdijMP8iKwGb2CAyFgGGq+ciA= X-Received: by 2002:a5d:670f:0:b0:452:75ca:3fab with SMTP id ffacd0b85a97d-45275ca3fe3mr1840819f8f.38.1778096050623; Wed, 06 May 2026 12:34:10 -0700 (PDT) Received: from [192.168.0.2] ([197.250.51.29]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-45055960022sm14895673f8f.26.2026.05.06.12.34.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 May 2026 12:34:10 -0700 (PDT) From: =?utf-8?q?Stefan_D=C3=B6singer?= Date: Wed, 06 May 2026 22:33:21 +0300 Subject: [PATCH v8 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: <20260506-send-v8-4-f1bdf3243b34@gmail.com> References: <20260506-send-v8-0-f1bdf3243b34@gmail.com> In-Reply-To: <20260506-send-v8-0-f1bdf3243b34@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/ZANAwAIAT0TvMhUTxoiAcsmYgBp+5eWEF9Smqy9/+ZqLj+fvYU3rR6MQcKz77DkM QtvC+gIXhWJAk8EAAEIADkWIQRDFvS2qgVbJ5UyXWw9E7zIVE8aIgUCafuXlhsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQPRO8yFRPGiIx/A/+Jj3LBH9tnjU1WCvDlmvuDKP60pwv77H 9cpKC5X8jU9Rk6vURr6BpE8J21cX+UHaMCaKC/Cf+xiQjWpQDugt4fK44PCsOUg6F7a7+jGOWY8 LL8LpnoGzjHW1NVmdbkeIqLE5Z7NBnnIsVb/f1Rm+I/Tw0MN30e9KM5Xfdi4iXUdyMh3pLKzLY3 +USPgYvQz6P341ijtBwuMeYsMccIDefew83LipWaF+qR59w2l/s5dZcZHpWddYo80R+tS5HSACY MDD5qa//5HcW+9N3ya2Syb+bqG6LBe7ydReM1FxRWUPxBmcSSOQSUaBncNAGvKdQmGqfk9EQCrV sveBZA+Gm42mHgoXEghXSHEtf7qtxmr6rIiim6j/+MvLnoruinWXl1ift6t+tNM+wzcbRVXN9QY xxflUe2qn0gUmUOAYSRP5Dp3hnWvMs1BGlVRZ+rRaqDrxGI3MX2KBKDiIjhZR9Mi+j+IdTXdJYe dWE2CP3QhYQ23VqOhadxflZUQTwJi7pdOndO6VpPcW4uMJ0uxIp8RprT04JnghBw8juuFGjogmf qFdCVa2SkLAjHfVIzqLJwt4vQpVMbX3bKKVTOEv4m+UEZUB105F8UckcQ94A4XmVy4NU42WvjmF cGzwd9WYmlmtk1x1/KjQgxjaMnfuCad5XpV0o/9care4lwus9wwc= 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