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 699313ED5D4 for ; Thu, 16 Apr 2026 20:20:04 +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=1776370810; cv=none; b=URLeT2Y92PB4eaAIE8LSoe5Le3nnraEb/hkhPYpEJHR4RLpT35oZkI9nOI50SFrxaAWXafG30yABUAAZMcXm1YwzJjzolG50gj+UI2afB0ZK4Id3tko5najsivbz47oWoArb0atouGRVExN3vDt4U7Tiea4WUwfPtbUxAX3amOs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776370810; c=relaxed/simple; bh=zqX6tFIGEUCVaeZF4QkxvcJ5oMEM87X0rHqUfEPpl/g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Jd1M52bgfQmk/A1QyjJXqzYiaUrQXj8DmcH0c+VblzWH+zNXoeFuXHR+Kxz0Fmw8Oj2TAqXL4IVZqWel+LgOL/UIudog5ICfONFJLJ0iHobCPI3GeNwlhl1FcuyIQEcS4W4h2CjBj+HCmtQtYAuGaSN78qXTyAfMxKTsVCqqkn0= 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=P0a2Szwp; 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="P0a2Szwp" Received: by mail-wr1-f53.google.com with SMTP id ffacd0b85a97d-43eb012ac4fso1082428f8f.0 for ; Thu, 16 Apr 2026 13:20:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1776370797; x=1776975597; 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=0T03nzSg8o1Xiwn3g5TYhAqMiuGuUlEI3maXBZPCdug=; b=P0a2Szwpe0CY2ZBY/PbJg9rlM3HNnwwWXuEDn707qh1gjAEjqS4OmbcIKNIUZo0A0S 0SWQmqpn0puXhUuqm3IDXlCDSzSOIxitF4CPIE3Ai9eYeQMCDB6bey3+u9sh+0BiaxWl TCLitHHx2HcDZb5juR7rOkXe0n95nbVfzkfu8uVX80lQp6cBIQ0U9GEoU33HID36J/HB yB4DTe2RYfgTdYAgkhmfgX/WkPfraCL+EVkII0Q8KuvbnOC+yPab4MppZUhScBSIiBz9 vllyYoLlnP/uDsz/RB3sO0gPNw38Kfk22eHv+Zq9x7zVvUacMIRKgdXmzcutxkv+bMBd C4pQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776370797; x=1776975597; 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=0T03nzSg8o1Xiwn3g5TYhAqMiuGuUlEI3maXBZPCdug=; b=dN6tCWXDib95URmwpQc0tXJ4FJwXqyuDp1FMXcE9JIBba3+kAB37G8qqOfrgwEGjF+ oh2dp/ubkeeRrtFakj34NyqDfFvxEgVXFe7uxaBdEUIMGT42i4MArCaoPjdRdJ8igcfC nHFh1cwuODLhupY6ZXYGx78t0qcE0OlJ1dMIOMPLvyReO1RimIpDIc1tJ4eB3kzlQeRM ySTQHZ+tYq+Aj7s4HTRpeq8aiaGGNHhccomFiNYqCPDiVLcSaO6EfHPOtqTKMHKkzxAs EVRLIGHRGuEvk2CMib2zIg13nhTGvPtwJg0BKVDYLmdvFRryVLOzXixjt2HMzl2RIBA3 N2sA== X-Gm-Message-State: AOJu0YwSrlsiuTI5GJadlTV+DN969tIWaR4Qq/IjDeoXVM3fE2tMGAei aejSEw2T0HCUJy8wQE+GMOCx8ZCI+A35COLFWv+cjHAyw/Cpi8g58Psq X-Gm-Gg: AeBDieu97xfz51mmoSMARlFW6e+m+mzDC04ZwMFJmdzCG6m58Epe/HVVZxqfXoyThGd apSD5n1CDQ5o3jKaRdGVq2+SHj5qMioylv7QG8s4pykiadPgI+pCrdX/pWhiufRN1r0jcHJK6zR VZiwtpcdr7U6uEWy4cFJ9mZXWuPxERgBMx6NhhWtrh6EKRcvzp3ojmC4Dk+Bhgy6m+2Cwm0cm4i Dsd43mDNNmw88PsMl9l1m0udoPTlelbq6wzyoHF152tVwWdC1ecC/1RSEZ7wZo6Ec3fGJFxduOK n7erLSKpM9qJB/FLi3yt2M4KT/NZRXEaHPXl9H9CjE+6sSZPT2B/K7y6bq2cGWeMfqQyN3ZfatZ K00bk87yJGZ5JuBxpv7whi13YfIe1U4/P8m8qvC2jIleh2bNzd0YyEnLdtjQPSF4XHGbPoBKuRT 7ISV/Uc+PYcf6MbstLHD5wpYixH58CU44ZlWo6Cd461yaSjQ== X-Received: by 2002:a05:6000:18a5:b0:43e:a69b:d810 with SMTP id ffacd0b85a97d-43fe169d563mr1185520f8f.38.1776370796893; Thu, 16 Apr 2026 13:19:56 -0700 (PDT) Received: from [192.168.0.2] ([197.250.227.196]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43ead35c026sm16180624f8f.15.2026.04.16.13.19.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Apr 2026 13:19:56 -0700 (PDT) From: =?utf-8?q?Stefan_D=C3=B6singer?= Date: Thu, 16 Apr 2026 23:19:14 +0300 Subject: [PATCH v4 6/8] ARM: zte: Bring back zx29 UART support Precedence: bulk X-Mailing-List: linux-doc@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: <20260416-send-v4-6-e19d02b944ec@gmail.com> References: <20260416-send-v4-0-e19d02b944ec@gmail.com> In-Reply-To: <20260416-send-v4-0-e19d02b944ec@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=2641; i=stefandoesinger@gmail.com; h=from:subject:message-id; bh=zqX6tFIGEUCVaeZF4QkxvcJ5oMEM87X0rHqUfEPpl/g=; b=owEBiQJ2/ZANAwAIAT0TvMhUTxoiAcsmYgBp4URLOAzH1tDsqAQM6YsZ7GEyIYJznmL2L8uIk nhr3jf9n4yJAk8EAAEIADkWIQRDFvS2qgVbJ5UyXWw9E7zIVE8aIgUCaeFESxsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIACgkQPRO8yFRPGiKx/w/8DjeLetUi3csxyMsp3tA2IS2LYDPYepk nusCL8dln6bs70+ADwKi4Y4a31RnjheChLnfNcfosGcDQiO00EXr5uP5c/PRGfl/oOLslI3uOkZ 5VY/xxMT5nuqII8In4qpDumJhiEStbYx3EUYZ7+Zwh+4UUtnxVKpqcPnhoHKucrfETgSCykXo2Q fUsaAnCy4JQ+S1pkPa2kE52QzqYRhV9wEFf2vsQcpfdlObUuxtjl/xhYeKy8SRNhx57Odec5vuj 9sqRIke/0799ZtihtMrHMDSvmpZiR6Ea4u9Hl1/5LOt903k8E1iUF9a2NYnSPmnMmYJLPdQ4UPj n6vlHIJpXlkxFYN23/W3YU5+gEGY+hvL1dALjmwmvQclDe5HCyDmkU/ZrSi3rtVbvAr+wQ8Dxgf Jkh6iEbGRGRZG549PgjH+uCDgF7+hWCNTE9uJt49lFe0lXkrmgmrZMNmlq06L8vcluLTaAbnK6D +5xHw2T2tcuviAmrV6ovuLi4/UaECUyZbSKiMTH/0sqTUFMHATLO9iLwWt3zR5u6Pf75BYOGnjb dV1GlpeL86CeIaFTQ93V1GoEQIlS8tM0E9PHNxgC/O3ZarpJIRT5Mf1XyFWVRlWb5DSC51YcHw7 Xu+XbvZWPNUuqTHq1jDa3p2c2w+UZqjTtBqmK2pyHU42ZwVkbn0c= 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. Signed-off-by: Stefan Dösinger --- drivers/tty/serial/amba-pl011.c | 37 +++++++++++++++++++++++++++++++++++++ include/linux/amba/bus.h | 6 ++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 7f17d288c807..858a0edd3e3b 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 +3113,11 @@ static const struct amba_id pl011_ids[] = { .mask = 0x00ffffff, .data = &vendor_st, }, + { + .id = AMBA_LINUX_ID(0x00, 0x1, 0xffe), + .mask = 0x00ffffff, + .data = &vendor_zte, + }, { 0, 0 }, }; diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index 9946276aff73..854c962d70f5 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -103,8 +103,14 @@ enum amba_vendor { AMBA_VENDOR_ST = 0x80, AMBA_VENDOR_QCOM = 0x51, AMBA_VENDOR_LSI = 0xb6, + AMBA_VENDOR_LINUX = 0xfe, /* This value is not official */ }; +/* This is used to generate pseudo-ID for AMBA device */ +#define AMBA_LINUX_ID(conf, rev, part) \ + (((conf) & 0xff) << 24 | ((rev) & 0xf) << 20 | \ + AMBA_VENDOR_LINUX << 12 | ((part) & 0xfff)) + extern const struct bus_type amba_bustype; #define to_amba_device(d) container_of_const(d, struct amba_device, dev) -- 2.52.0