From patchwork Mon Jun 10 08:42:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 10984375 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9D1014C0 for ; Mon, 10 Jun 2019 08:43:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BAC3E2876D for ; Mon, 10 Jun 2019 08:43:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AEB4528774; Mon, 10 Jun 2019 08:43:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4CFB728767 for ; Mon, 10 Jun 2019 08:43:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388664AbfFJIm6 (ORCPT ); Mon, 10 Jun 2019 04:42:58 -0400 Received: from mail-wr1-f68.google.com ([209.85.221.68]:47047 "EHLO mail-wr1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388352AbfFJImU (ORCPT ); Mon, 10 Jun 2019 04:42:20 -0400 Received: by mail-wr1-f68.google.com with SMTP id n4so8208268wrw.13 for ; Mon, 10 Jun 2019 01:42:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qYq7mFFCoR+D5QhtdnXfa7L63GrDNr+4aaRo7anMzNg=; b=HAQGPWUrBC+m/uOp1ExdylTBwwXMRfgop11L7pNji5XWXcPZW+6ErRLi511mBcytaZ W3UqLkpw33YmjBArJFkiHuEHbOEyKduZ+bAn1mEZaUDLiIz0ME6BhyAqU9BZvH7w4t+c rfxKHG3Vi1cDONkuWZlhKKSyjl21utH0TeuiZXwU6bY4c5DqQm23B1Ij/Kf+CFiZQdZS 1IreLq1aIZRV0ksEv4kfk4qGpXympkIsPxtlWW9qyKWS8h1amE5syenHSK7Z1CX4qH63 7iKFPjYSg8pCpTER+gxm8AcOcrvXC8eg15KcJ/txMHz4kDbhbyfiQ5AM02XS+7GT4M7B 8oMA== 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; bh=qYq7mFFCoR+D5QhtdnXfa7L63GrDNr+4aaRo7anMzNg=; b=kC+bITW3r0rWUEACv1s+8LAKjHaj+8Qzh5nJy0nl/zEqzKvAqwAmpG3PCxV9foYYBv Q90R1lBHlxqy/sZe9oHLroGreJfUUc+GCwPQ9EpdVOU0/G1tgB3+8lc/MNf1WpHRWRj5 11QdRM2gJz4mCMKvizxt46EJ1mY8loZAXkR48Y0wOr9Y9sqMSHWsoPhLAMqObrs6BsMO laSeJEnyDFzEKuOYNsGKrBdUVI8oDsgNJRNYwBv4jhzqihX6EiI6p9CJgckKf/7jehj0 1JmOPc1aly5K5L/HnkiFT93hJjbKYnVRHNh1t04k51MlP+1TsE+1g9D0SQ0FLP1rIlWk DaBQ== X-Gm-Message-State: APjAAAVI0GERr6Ka1GF/FUFnQD2fthefgZrRY8vXTfxhhP6FKfqGzL1x 6S/GTlRw86Fl92jU16q8GLlBXQ== X-Google-Smtp-Source: APXvYqzd94XuV2bw5qRr4c4SqMDr5KX6F6dDBrqoRThTieNRJaWBshe3NLdMg2h1vW6jj1+Btr9Plg== X-Received: by 2002:adf:ed41:: with SMTP id u1mr28476611wro.162.1560156138478; Mon, 10 Jun 2019 01:42:18 -0700 (PDT) Received: from localhost.localdomain ([2.31.167.229]) by smtp.gmail.com with ESMTPSA id a125sm9929670wmf.42.2019.06.10.01.42.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Jun 2019 01:42:18 -0700 (PDT) From: Lee Jones To: alokc@codeaurora.org, andy.gross@linaro.org, david.brown@linaro.org, wsa+renesas@sang-engineering.com, bjorn.andersson@linaro.org, linus.walleij@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, ard.biesheuvel@linaro.org, jlhugo@gmail.com, linux-i2c@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-gpio@vger.kernel.org, linux-usb@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lee Jones Subject: [PATCH v3 3/8] pinctrl: msm: Add ability for drivers to supply a reserved GPIO list Date: Mon, 10 Jun 2019 09:42:08 +0100 Message-Id: <20190610084213.1052-3-lee.jones@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190610084213.1052-1-lee.jones@linaro.org> References: <20190610084213.1052-1-lee.jones@linaro.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When booting MSM based platforms with Device Tree or some ACPI implementations, it is possible to provide a list of reserved pins via the 'gpio-reserved-ranges' and 'gpios' properties respectively. However some ACPI tables are not populated with this information, thus it has to come from a knowledgable device driver instead. Here we provide the MSM common driver with additional support to parse this informtion and correctly populate the widely used 'valid_mask'. Signed-off-by: Lee Jones Reviewed-by: Bjorn Andersson --- drivers/pinctrl/qcom/pinctrl-msm.c | 18 ++++++++++++++++++ drivers/pinctrl/qcom/pinctrl-msm.h | 1 + 2 files changed, 19 insertions(+) diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c index ee8119879c4c..3ac740b36508 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.c +++ b/drivers/pinctrl/qcom/pinctrl-msm.c @@ -607,8 +607,23 @@ static int msm_gpio_init_valid_mask(struct gpio_chip *chip) int ret; unsigned int len, i; unsigned int max_gpios = pctrl->soc->ngpios; + const int *reserved = pctrl->soc->reserved_gpios; u16 *tmp; + /* Driver provided reserved list overrides DT and ACPI */ + if (reserved) { + bitmap_fill(chip->valid_mask, max_gpios); + for (i = 0; reserved[i] >= 0; i++) { + if (i >= max_gpios || reserved[i] >= max_gpios) { + dev_err(pctrl->dev, "invalid list of reserved GPIOs\n"); + return -EINVAL; + } + clear_bit(reserved[i], chip->valid_mask); + } + + return 0; + } + /* The number of GPIOs in the ACPI tables */ len = ret = device_property_read_u16_array(pctrl->dev, "gpios", NULL, 0); @@ -964,6 +979,9 @@ static void msm_gpio_irq_handler(struct irq_desc *desc) static bool msm_gpio_needs_valid_mask(struct msm_pinctrl *pctrl) { + if (pctrl->soc->reserved_gpios) + return true; + return device_property_read_u16_array(pctrl->dev, "gpios", NULL, 0) > 0; } diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h b/drivers/pinctrl/qcom/pinctrl-msm.h index c12048e54a6f..23b93ae92269 100644 --- a/drivers/pinctrl/qcom/pinctrl-msm.h +++ b/drivers/pinctrl/qcom/pinctrl-msm.h @@ -121,6 +121,7 @@ struct msm_pinctrl_soc_data { bool pull_no_keeper; const char *const *tiles; unsigned int ntiles; + const int *reserved_gpios; }; extern const struct dev_pm_ops msm_pinctrl_dev_pm_ops;