From patchwork Mon Oct 30 06:22:18 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Jeffery X-Patchwork-Id: 831891 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3yQPZm0kd3z9sNx for ; Mon, 30 Oct 2017 17:24:16 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=aj.id.au header.i=@aj.id.au header.b="MOss02V0"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="MqC5PIPM"; 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 3yQPZl6BkYzDrcv for ; Mon, 30 Oct 2017 17:24:15 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=aj.id.au header.i=@aj.id.au header.b="MOss02V0"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="MqC5PIPM"; dkim-atps=neutral X-Original-To: linux-aspeed@lists.ozlabs.org Delivered-To: linux-aspeed@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=aj.id.au (client-ip=66.111.4.28; helo=out4-smtp.messagingengine.com; envelope-from=andrew@aj.id.au; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=aj.id.au header.i=@aj.id.au header.b="MOss02V0"; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="MqC5PIPM"; dkim-atps=neutral Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3yQPYg0QGHzDrcj; Mon, 30 Oct 2017 17:23:19 +1100 (AEDT) Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id 1434220CA6; Mon, 30 Oct 2017 02:23:17 -0400 (EDT) Received: from frontend2 ([10.202.2.161]) by compute4.internal (MEProxy); Mon, 30 Oct 2017 02:23:17 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aj.id.au; h=cc :date:from:in-reply-to:message-id:references:subject:to :x-me-sender:x-me-sender:x-sasl-enc; s=fm1; bh=bFr4nZKuaZM2a1Je9 /6jj05bVXQb0VIVZDUXUld1eSc=; b=MOss02V05WvMfEzLkDyp2fcc275zxoenb wcIYWvCEqTLNX3f2NeYQhtXoYoqgSjeOm7mIt4GedmtA1eWIlGTTmzgfGoAy3yDA Q8yjYu1WKmsL2r+emDrZuYoX0tHclX0/0HeYmnb65JzXgSylF5mlgWWc/IqrHLtz +xODzw51lyJ39OQVWIBh6cYe3xWkRxfLDGaqvELTUgIsEmKDbKMr7fap6ONtQXa0 bXDnwvsLJpRADZ6m4dIy36ehL818IOp8NWwXPRguzauBzh6X2HxThDTxsNraBKje NqCQcCOT5ghInP3lTdHxQeohOFjjpmbHJ/arXdikX0zeNwL+gYCHg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:date:from:in-reply-to:message-id :references:subject:to:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=bFr4nZKuaZM2a1Je9/6jj05bVXQb0VIVZDUXUld1eSc=; b=MqC5PIPM NVxthKFw2VOc9yLe9R99z0mO3O25VMZp9vEvLZLlJCiHtDknk0xtXUxH8lDBPutT 4+23Qe19S5t19uSe97Cq4zBZUoUMI21pPLLBNgUduOR3W7RSuYbfjrMpbEeRCjoC GJFDPsUs49hPeST4TcUR+iPHk+BOfouJ+Pgo6NH+cJskfW1pyNaeTanW5YjL0yQ0 is3qpvOTwL4JmFi7kgIW4UExQTW+1eQL8oJfzE1/BYHl+eUFEWIrR7qfPaEQIhkJ YNb5FRXpTANL82Bgdm0brpDG6uGhGvhh4FkMIN1T2yVJzDfRUBYQl0gRSY6VrVBB ox3eA902lfTnCQ== X-ME-Sender: Received: from keelia.au.ibm.com (unknown [203.0.153.9]) by mail.messagingengine.com (Postfix) with ESMTPA id 97D66247F0; Mon, 30 Oct 2017 02:23:11 -0400 (EDT) From: Andrew Jeffery To: linux-gpio@vger.kernel.org Subject: [PATCH v2 2/2] gpio: aspeed: Add support for reset tolerance Date: Mon, 30 Oct 2017 16:52:18 +1030 Message-Id: <20171030062218.27005-3-andrew@aj.id.au> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171030062218.27005-1-andrew@aj.id.au> References: <20171030062218.27005-1-andrew@aj.id.au> X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, ryan_chen@aspeedtech.com, linux-aspeed@lists.ozlabs.org, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, ldewangan@nvidia.com, ckeepax@opensource.wolfsonmicro.com, frowand.list@gmail.com, openbmc@lists.ozlabs.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Use the new pinconf parameter for state persistence to expose the associated capability of the Aspeed GPIO controller. Signed-off-by: Andrew Jeffery --- drivers/gpio/gpio-aspeed.c | 39 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 37 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c index 00dc1c020198..3125dcb9211d 100644 --- a/drivers/gpio/gpio-aspeed.c +++ b/drivers/gpio/gpio-aspeed.c @@ -60,6 +60,7 @@ struct aspeed_gpio_bank { uint16_t val_regs; uint16_t irq_regs; uint16_t debounce_regs; + uint16_t tolerance_regs; const char names[4][3]; }; @@ -70,48 +71,56 @@ static const struct aspeed_gpio_bank aspeed_gpio_banks[] = { .val_regs = 0x0000, .irq_regs = 0x0008, .debounce_regs = 0x0040, + .tolerance_regs = 0x001c, .names = { "A", "B", "C", "D" }, }, { .val_regs = 0x0020, .irq_regs = 0x0028, .debounce_regs = 0x0048, + .tolerance_regs = 0x003c, .names = { "E", "F", "G", "H" }, }, { .val_regs = 0x0070, .irq_regs = 0x0098, .debounce_regs = 0x00b0, + .tolerance_regs = 0x00ac, .names = { "I", "J", "K", "L" }, }, { .val_regs = 0x0078, .irq_regs = 0x00e8, .debounce_regs = 0x0100, + .tolerance_regs = 0x00fc, .names = { "M", "N", "O", "P" }, }, { .val_regs = 0x0080, .irq_regs = 0x0118, .debounce_regs = 0x0130, + .tolerance_regs = 0x012c, .names = { "Q", "R", "S", "T" }, }, { .val_regs = 0x0088, .irq_regs = 0x0148, .debounce_regs = 0x0160, + .tolerance_regs = 0x015c, .names = { "U", "V", "W", "X" }, }, { .val_regs = 0x01E0, .irq_regs = 0x0178, .debounce_regs = 0x0190, + .tolerance_regs = 0x018c, .names = { "Y", "Z", "AA", "AB" }, }, { - .val_regs = 0x01E8, - .irq_regs = 0x01A8, + .val_regs = 0x01e8, + .irq_regs = 0x01a8, .debounce_regs = 0x01c0, + .tolerance_regs = 0x01bc, .names = { "AC", "", "", "" }, }, }; @@ -534,6 +543,30 @@ static int aspeed_gpio_setup_irqs(struct aspeed_gpio *gpio, return 0; } +static int aspeed_gpio_reset_tolerance(struct gpio_chip *chip, + unsigned int offset, bool enable) +{ + struct aspeed_gpio *gpio = gpiochip_get_data(chip); + const struct aspeed_gpio_bank *bank; + unsigned long flags; + u32 val; + + bank = to_bank(offset); + + spin_lock_irqsave(&gpio->lock, flags); + val = readl(gpio->base + bank->tolerance_regs); + + if (enable) + val |= GPIO_BIT(offset); + else + val &= ~GPIO_BIT(offset); + + writel(val, gpio->base + bank->tolerance_regs); + spin_unlock_irqrestore(&gpio->lock, flags); + + return 0; +} + static int aspeed_gpio_request(struct gpio_chip *chip, unsigned int offset) { if (!have_gpio(gpiochip_get_data(chip), offset)) @@ -771,6 +804,8 @@ static int aspeed_gpio_set_config(struct gpio_chip *chip, unsigned int offset, param == PIN_CONFIG_DRIVE_OPEN_SOURCE) /* Return -ENOTSUPP to trigger emulation, as per datasheet */ return -ENOTSUPP; + else if (param == PIN_CONFIG_PERSIST_STATE) + return aspeed_gpio_reset_tolerance(chip, offset, arg); return -ENOTSUPP; }