From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED03EC0044C for ; Wed, 31 Oct 2018 23:35:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B300C20664 for ; Wed, 31 Oct 2018 23:35:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="vzqhX4CG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B300C20664 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730517AbeKAIf6 (ORCPT ); Thu, 1 Nov 2018 04:35:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:58734 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730242AbeKAIJI (ORCPT ); Thu, 1 Nov 2018 04:09:08 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 16A0E2081B; Wed, 31 Oct 2018 23:08:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541027336; bh=xXl0T0UaSbTCJv8rNceggG65O/Iizv3+FBKTy9tKiOc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vzqhX4CGIQNMSAd8zsyLPoRl9uTIYquEVHZtm5NwjCtdgdotxm6oeXuUNvPtsSfpc +PbOd2D0phdorlkuQUTj34XbaQ7IOGUw9aMVrEEXtjViV3C3tUjf1qOJ6SjgG6i4Rk SuuXl6q3WcNZU/n9R6IlzfN3NBrfvGE6DJvF/rUM= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Justin Chen , Linus Walleij , Sasha Levin Subject: [PATCH AUTOSEL 4.18 067/126] gpio: brcmstb: allow 0 width GPIO banks Date: Wed, 31 Oct 2018 19:06:55 -0400 Message-Id: <20181031230754.29029-67-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181031230754.29029-1-sashal@kernel.org> References: <20181031230754.29029-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Justin Chen [ Upstream commit bfba223dcc4548632d8f3bfd15690a86d4c68504 ] Sometimes we have empty banks within the GPIO block. This commit allows proper handling of 0 width GPIO banks. We handle 0 width GPIO banks by incrementing the bank and number of GPIOs, but not initializing them. This will mean a call into the non-existent GPIOs will return an error. Also remove "GPIO registered" dev print. This information is misleading since the incremented banks and gpio_base do not reflect the actual GPIOs that get initialized. We leave this information out since it is already printed with dev_dbg. Signed-off-by: Justin Chen Acked-by: Florian Fainelli Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- drivers/gpio/gpio-brcmstb.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c index 16c7f9f49416..af936dcca659 100644 --- a/drivers/gpio/gpio-brcmstb.c +++ b/drivers/gpio/gpio-brcmstb.c @@ -664,6 +664,18 @@ static int brcmstb_gpio_probe(struct platform_device *pdev) struct brcmstb_gpio_bank *bank; struct gpio_chip *gc; + /* + * If bank_width is 0, then there is an empty bank in the + * register block. Special handling for this case. + */ + if (bank_width == 0) { + dev_dbg(dev, "Width 0 found: Empty bank @ %d\n", + num_banks); + num_banks++; + gpio_base += MAX_GPIO_PER_BANK; + continue; + } + bank = devm_kzalloc(dev, sizeof(*bank), GFP_KERNEL); if (!bank) { err = -ENOMEM; @@ -740,9 +752,6 @@ static int brcmstb_gpio_probe(struct platform_device *pdev) goto fail; } - dev_info(dev, "Registered %d banks (GPIO(s): %d-%d)\n", - num_banks, priv->gpio_base, gpio_base - 1); - if (priv->parent_wake_irq && need_wakeup_event) pm_wakeup_event(dev, 0); -- 2.17.1