From patchwork Thu Nov 28 14:55:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1202203 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47P36G0wPTz9s4Y for ; Fri, 29 Nov 2019 03:30:46 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=rasmusvillemoes.dk Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="BNS8YU7z"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47P36F0kfhzDqQP for ; Fri, 29 Nov 2019 03:30:45 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=rasmusvillemoes.dk (client-ip=2a00:1450:4864:20::242; helo=mail-lj1-x242.google.com; envelope-from=linux@rasmusvillemoes.dk; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=rasmusvillemoes.dk Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=rasmusvillemoes.dk header.i=@rasmusvillemoes.dk header.b="BNS8YU7z"; dkim-atps=neutral Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 47P13405TdzDqsd for ; Fri, 29 Nov 2019 01:57:52 +1100 (AEDT) Received: by mail-lj1-x242.google.com with SMTP id e10so19658927ljj.6 for ; Thu, 28 Nov 2019 06:57:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rasmusvillemoes.dk; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gOHk69/KFsExobLE9NJQaGShwXGaUdC/TzJxF/vkfiE=; b=BNS8YU7z/62qBru4p5dWldmGUqPFFFYcSf6UoO5+N8cI1t/eYIwVb93SWj/sJb/aPr CLgKaJzW4T4UJCDV6fxG/mFRQa5+pWEgUVNo9gk6Z/haJ0GbejDd0krX3Tx1ekUBIG7+ Kf0VDKOEyN97OudALHUN6autns8qnyxm/Ncyk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gOHk69/KFsExobLE9NJQaGShwXGaUdC/TzJxF/vkfiE=; b=Boxl8jFIQvAHmEr/iOlfl329NY7zseDtcZZ+wlSA+9Tq/IAjJECFDjsZu+3kSjv8bU Dnuo4pDMaDU0IJmRBKQTn/WefjmMbuDv+qjyDR6d6E55m9/o5MWZfs7/Z6MrYcRdUBeH ppxhMhJA6lJ+1WJwWLxtaqFa30mFDvw6Dq43O+C3ZMsDBnhnamaiCicVN5oGQzUyb9h+ J0TKncq0ZBhuBGAkElHzFAUuvt7yZmT0nIyYPUk9RDge1f5oi7jH8ah6JY2MGyFhggVE guKcvaavAOaOQFfybvakx56j6JHVVML/kEqHqLpce9CRIvJh+dRWdfT6cln/gNg/iG+W Mw5w== X-Gm-Message-State: APjAAAVK6iRhys9bfd0yHHsCmkvsjcTdw0q3uWWEcDUWb1D9NImwGypn mqQUUTCCkmiJyToPBWG0fj6OTw== X-Google-Smtp-Source: APXvYqyIZpDYj/S47jI4BvahQQv0z5TMLaQBBFJjaoxjSz2gIfzyz1ZHAFXq4N7Oyd5IVHNFskfXyA== X-Received: by 2002:a2e:7405:: with SMTP id p5mr19349633ljc.34.1574953067629; Thu, 28 Nov 2019 06:57:47 -0800 (PST) Received: from prevas-ravi.prevas.se ([81.216.59.226]) by smtp.gmail.com with ESMTPSA id u2sm2456803lfl.18.2019.11.28.06.57.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Nov 2019 06:57:47 -0800 (PST) From: Rasmus Villemoes To: Qiang Zhao , Li Yang , Christophe Leroy Subject: [PATCH v6 32/49] serial: ucc_uart: use of_property_read_u32() in ucc_uart_probe() Date: Thu, 28 Nov 2019 15:55:37 +0100 Message-Id: <20191128145554.1297-33-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191128145554.1297-1-linux@rasmusvillemoes.dk> References: <20191128145554.1297-1-linux@rasmusvillemoes.dk> MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Timur Tabi , Rasmus Villemoes , linux-kernel@vger.kernel.org, Scott Wood , linux-serial@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" For this to work correctly on little-endian hosts, don't access the device-tree properties directly in native endianness, but use the of_property_read_u32() helper. Reviewed-by: Timur Tabi Acked-by: Timur Tabi Signed-off-by: Rasmus Villemoes --- drivers/tty/serial/ucc_uart.c | 36 +++++++++++++++-------------------- 1 file changed, 15 insertions(+), 21 deletions(-) diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 313697842e24..c055abf4c919 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1256,10 +1256,10 @@ static int soft_uart_init(struct platform_device *ofdev) static int ucc_uart_probe(struct platform_device *ofdev) { struct device_node *np = ofdev->dev.of_node; - const unsigned int *iprop; /* Integer OF properties */ const char *sprop; /* String OF properties */ struct uart_qe_port *qe_port = NULL; struct resource res; + u32 val; int ret; /* @@ -1290,23 +1290,20 @@ static int ucc_uart_probe(struct platform_device *ofdev) /* Get the UCC number (device ID) */ /* UCCs are numbered 1-7 */ - iprop = of_get_property(np, "cell-index", NULL); - if (!iprop) { - iprop = of_get_property(np, "device-id", NULL); - if (!iprop) { - dev_err(&ofdev->dev, "UCC is unspecified in " - "device tree\n"); + if (of_property_read_u32(np, "cell-index", &val)) { + if (of_property_read_u32(np, "device-id", &val)) { + dev_err(&ofdev->dev, "UCC is unspecified in device tree\n"); ret = -EINVAL; goto out_free; } } - if ((*iprop < 1) || (*iprop > UCC_MAX_NUM)) { - dev_err(&ofdev->dev, "no support for UCC%u\n", *iprop); + if (val < 1 || val > UCC_MAX_NUM) { + dev_err(&ofdev->dev, "no support for UCC%u\n", val); ret = -ENODEV; goto out_free; } - qe_port->ucc_num = *iprop - 1; + qe_port->ucc_num = val - 1; /* * In the future, we should not require the BRG to be specified in the @@ -1350,13 +1347,12 @@ static int ucc_uart_probe(struct platform_device *ofdev) } /* Get the port number, numbered 0-3 */ - iprop = of_get_property(np, "port-number", NULL); - if (!iprop) { + if (of_property_read_u32(np, "port-number", &val)) { dev_err(&ofdev->dev, "missing port-number in device tree\n"); ret = -EINVAL; goto out_free; } - qe_port->port.line = *iprop; + qe_port->port.line = val; if (qe_port->port.line >= UCC_MAX_UART) { dev_err(&ofdev->dev, "port-number must be 0-%u\n", UCC_MAX_UART - 1); @@ -1386,31 +1382,29 @@ static int ucc_uart_probe(struct platform_device *ofdev) } } - iprop = of_get_property(np, "brg-frequency", NULL); - if (!iprop) { + if (of_property_read_u32(np, "brg-frequency", &val)) { dev_err(&ofdev->dev, "missing brg-frequency in device tree\n"); ret = -EINVAL; goto out_np; } - if (*iprop) - qe_port->port.uartclk = *iprop; + if (val) + qe_port->port.uartclk = val; else { /* * Older versions of U-Boot do not initialize the brg-frequency * property, so in this case we assume the BRG frequency is * half the QE bus frequency. */ - iprop = of_get_property(np, "bus-frequency", NULL); - if (!iprop) { + if (of_property_read_u32(np, "bus-frequency", &val)) { dev_err(&ofdev->dev, "missing QE bus-frequency in device tree\n"); ret = -EINVAL; goto out_np; } - if (*iprop) - qe_port->port.uartclk = *iprop / 2; + if (val) + qe_port->port.uartclk = val / 2; else { dev_err(&ofdev->dev, "invalid QE bus-frequency in device tree\n");