From patchwork Fri Nov 8 13:00:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1191881 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (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 478h7K0spqz9s4Y for ; Sat, 9 Nov 2019 00:33:49 +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="HJOJZkxw"; dkim-atps=neutral Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 478h7H3GfWzF57C for ; Sat, 9 Nov 2019 00:33:47 +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::142; helo=mail-lf1-x142.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="HJOJZkxw"; dkim-atps=neutral Received: from mail-lf1-x142.google.com (mail-lf1-x142.google.com [IPv6:2a00:1450:4864:20::142]) (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 478gQD2cNqzF6qJ for ; Sat, 9 Nov 2019 00:01:40 +1100 (AEDT) Received: by mail-lf1-x142.google.com with SMTP id m6so4421115lfl.3 for ; Fri, 08 Nov 2019 05:01:40 -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=KU/n1Q/VNXJbWwIQys/qt9rGcT4PXz5RLqrj6x2UwvM=; b=HJOJZkxwDS0medOsmpThvkVAMPgReePyoCZfeE53ipRTRMDB0W6c5pAuf6ddW16YzH bTOd+bBAagLh5RkQgulpK6Rx2eot8KegFwHr4WplwoCtgkFmTv4Kl1wWcO7q9ySV5I6z pMMrXUWvpVqVoyCYDeiFszP4vKVSXYmeRZehM= 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=KU/n1Q/VNXJbWwIQys/qt9rGcT4PXz5RLqrj6x2UwvM=; b=rfB5cfr9SeNKR5pe+njomnvM2ZvoZhnjWMg/f6BpM7deNUCggNJVbAu7ZQsgE7AD/2 Pl1GLWIhR7QiG7a16MM35iYHZOv6l2Oo3xq/cQH7Wo5IjNCCUR0vJeuXcuztdLo1ZoQp twFeuSMrimdOmbMMdxYsRJYSk5FI3KdD8eqJQtj2fD12Ma+CYSK0kFVui0VgZhBdM/8P w7a4U4k4dILv8imdwvz2aTx7HIz3N5QQitLE5nhqdnWKAkLc73kspFb+O/zWF9Zyr6DM jigwLGzYdg1nvB7dLaugmhCPsbxnmglAxszk7A9mQXYlIlmf/kS6s5LmoCWPufQ1z9DJ Ovsw== X-Gm-Message-State: APjAAAXcBttVj2vI4hx20+BdI21tSGJvIECYdNfIrOU309JTMppRsqNk 6KQEEeuS0JxP/0iqwIlsB4llMw== X-Google-Smtp-Source: APXvYqwV1QSJeo2zO51t+HaG52pdBxkjO72k8ABUQOFAqLzD+fyt+4MoIaNvkXvy8mC20ecsyTXyqQ== X-Received: by 2002:a19:5e53:: with SMTP id z19mr6167585lfi.111.1573218096769; Fri, 08 Nov 2019 05:01:36 -0800 (PST) Received: from prevas-ravi.prevas.se ([81.216.59.226]) by smtp.gmail.com with ESMTPSA id d28sm2454725lfn.33.2019.11.08.05.01.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2019 05:01:36 -0800 (PST) From: Rasmus Villemoes To: Qiang Zhao , Li Yang , Christophe Leroy Subject: [PATCH v4 07/47] soc: fsl: qe: qe.c: guard use of pvr_version_is() with CONFIG_PPC32 Date: Fri, 8 Nov 2019 14:00:43 +0100 Message-Id: <20191108130123.6839-8-linux@rasmusvillemoes.dk> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191108130123.6839-1-linux@rasmusvillemoes.dk> References: <20191108130123.6839-1-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: Scott Wood , Rasmus Villemoes , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Commit e5c5c8d23fef (soc/fsl/qe: only apply QE_General4 workaround on affected SoCs) introduced use of pvr_version_is(), saying The QE_General4 workaround is only valid for the MPC832x and MPC836x SoCs. The other SoCs that embed a QUICC engine are not affected by this hardware bug and thus can use the computed divisors (this was successfully tested on the T1040). I'm reading the above as saying that the errata does not apply to the ARM-based SOCs with QUICC engine. In any case, use of pvr_version_is() must be guarded by CONFIG_PPC32 before we can remove the PPC32 dependency from CONFIG_QUICC_ENGINE, so introduce qe_general4_errata() to keep the necessary #ifdeffery localized to a trivial helper. Signed-off-by: Rasmus Villemoes --- drivers/soc/fsl/qe/qe.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 85737e6f5b62..1d8aa62c7ddf 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -197,6 +197,14 @@ EXPORT_SYMBOL(qe_get_brg_clk); #define PVR_VER_836x 0x8083 #define PVR_VER_832x 0x8084 +static bool qe_general4_errata(void) +{ +#ifdef CONFIG_PPC32 + return pvr_version_is(PVR_VER_836x) || pvr_version_is(PVR_VER_832x); +#endif + return false; +} + /* Program the BRG to the given sampling rate and multiplier * * @brg: the BRG, QE_BRG1 - QE_BRG16 @@ -223,7 +231,7 @@ int qe_setbrg(enum qe_clock brg, unsigned int rate, unsigned int multiplier) /* Errata QE_General4, which affects some MPC832x and MPC836x SOCs, says that the BRG divisor must be even if you're not using divide-by-16 mode. */ - if (pvr_version_is(PVR_VER_836x) || pvr_version_is(PVR_VER_832x)) + if (qe_general4_errata()) if (!div16 && (divisor & 1) && (divisor > 3)) divisor++;