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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C8C8BC433EF for ; Thu, 24 Feb 2022 16:13:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+nHmigAt/oMmhiaypg8548ZuTz1aDPBLuzvqwihzrlA=; b=c7ngFhPbsPhKHT qjOlRAEOnNmCynwUIGinvMjgymapv+MjLWoxWbJbiabZ3VpYvtnZJJXYuqGFdJSGqMoMl2YkfQWGu GMEnts2s0kAlLNQAEJhYm2uoWKnipEJemxgZ80kTKESo199zYKoc5mU99Qi/g9WqGEaaSxVxP14Bu c6/5oHtSKsdalFY9wiNwIWoZNyv0JGIttvBlBVduGxXtOHjUesEyhK3oMOzZ2Cu/QyFRLHpHRDH1i KI8AYImtNlciOpCO1QA/+mWxqA9/KGrn3jyGSdeD5+xBDDRrYU4PP4A39phVs/llbuou1GMPTAuaz 8srACvhc9Dn8jqTG5z1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNGiv-001UrD-JD; Thu, 24 Feb 2022 16:12:09 +0000 Received: from ssl.serverraum.org ([176.9.125.105]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNGhU-001US5-3V for linux-arm-kernel@lists.infradead.org; Thu, 24 Feb 2022 16:10:45 +0000 Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 4753F223ED; Thu, 24 Feb 2022 17:10:38 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1645719038; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QfIDQa6FJTFwfCIXNvNQ6T+ZpBTS7tbFcvelBvUPgsA=; b=YVLvsrlFhhYpizdRGZmET0UpkAklb9xkIMvO2paxqpe2GjSdlE887eVqs/Q6HCIKvNf3Ms LgGr3gZICJWIZJ6/6UQ1yKa44oNQf3jcgHb12oAbcj6ZxS3XhvEFwUVDYZYSC12xM6mp+X Vh4MeZlvNbbGJixj6wszqCU/oki0yF8= From: Michael Walle To: Lars Povlsen , Steen Hegelund , Linus Walleij Cc: UNGLinuxDriver@microchip.com, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Colin Foster , Michael Walle Subject: [PATCH v1 2/5] pinctrl: microchip-sgpio: don't do RMW for interrupt ack register Date: Thu, 24 Feb 2022 17:10:18 +0100 Message-Id: <20220224161021.2197263-3-michael@walle.cc> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220224161021.2197263-1-michael@walle.cc> References: <20220224161021.2197263-1-michael@walle.cc> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220224_081040_387933_45941CB8 X-CRM114-Status: GOOD ( 12.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The interrupt ack register has the usual "write one to clear" semantics. No read-modify-write is required here. This is also a preparation patch to change the sgpio_clrsetbits() to use regmap_update_bits() which don't write the value if it is not changed. Signed-off-by: Michael Walle --- drivers/pinctrl/pinctrl-microchip-sgpio.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/pinctrl/pinctrl-microchip-sgpio.c b/drivers/pinctrl/pinctrl-microchip-sgpio.c index b43302cc188a..31c4401f725e 100644 --- a/drivers/pinctrl/pinctrl-microchip-sgpio.c +++ b/drivers/pinctrl/pinctrl-microchip-sgpio.c @@ -640,7 +640,14 @@ static void microchip_sgpio_irq_unmask(struct irq_data *data) static void microchip_sgpio_irq_ack(struct irq_data *data) { - microchip_sgpio_irq_setreg(data, REG_INT_ACK, false); + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct sgpio_bank *bank = gpiochip_get_data(chip); + unsigned int gpio = irqd_to_hwirq(data); + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(bank->priv, gpio, &addr); + + sgpio_writel(bank->priv, BIT(addr.port), REG_INT_ACK, addr.bit); } static int microchip_sgpio_irq_set_type(struct irq_data *data, unsigned int type) -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel