From patchwork Wed Aug 13 16:16:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Grygorii Strashko X-Patchwork-Id: 4719481 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5BC1FC0338 for ; Wed, 13 Aug 2014 15:34:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 36C4B2012F for ; Wed, 13 Aug 2014 15:34:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 117D1201BC for ; Wed, 13 Aug 2014 15:34:22 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XHaXS-0003p5-DK; Wed, 13 Aug 2014 15:32:34 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XHaXI-0003fM-Af for linux-arm-kernel@lists.infradead.org; Wed, 13 Aug 2014 15:32:24 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id s7DFVxZq002204; Wed, 13 Aug 2014 10:31:59 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s7DFVxqu017759; Wed, 13 Aug 2014 10:31:59 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Wed, 13 Aug 2014 10:31:59 -0500 Received: from localhost (dlep60.itg.ti.com [157.170.170.21]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s7DFVwN6028935; Wed, 13 Aug 2014 10:31:59 -0500 From: Grygorii Strashko To: Linus Walleij , , , Subject: [PATCH 1/4] gpio: syscon: add soc specific callback to assign output value Date: Wed, 13 Aug 2014 19:16:19 +0300 Message-ID: <1407946582-20927-2-git-send-email-grygorii.strashko@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1407946582-20927-1-git-send-email-grygorii.strashko@ti.com> References: <1407946582-20927-1-git-send-email-grygorii.strashko@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140813_083224_454093_A5A61536 X-CRM114-Status: UNSURE ( 9.84 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -5.7 (-----) Cc: Alexandre Courbot , Grygorii Strashko , Rob Herring , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some SoCs (like Keystone) may require to perform special sequence of operations to assign output GPIO value, so default implementation of .set() callback from gpio-syscon driver can't be used. Hence, add optional, SoC specific callback to assign output gpio value. Signed-off-by: Grygorii Strashko --- drivers/gpio/gpio-syscon.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c index 30884fb..03b4699 100644 --- a/drivers/gpio/gpio-syscon.c +++ b/drivers/gpio/gpio-syscon.c @@ -37,6 +37,8 @@ * dat_bit_offset: Offset (in bits) to the first GPIO bit. * dir_bit_offset: Optional offset (in bits) to the first bit to switch * GPIO direction (Used with GPIO_SYSCON_FEAT_DIR flag). + * set: HW specific callback to assigns output value + * for signal "offset" */ struct syscon_gpio_data { @@ -45,6 +47,8 @@ struct syscon_gpio_data { unsigned int bit_count; unsigned int dat_bit_offset; unsigned int dir_bit_offset; + void (*set)(struct gpio_chip *chip, + unsigned offset, int value); }; struct syscon_gpio_priv { @@ -77,6 +81,11 @@ static void syscon_gpio_set(struct gpio_chip *chip, unsigned offset, int val) struct syscon_gpio_priv *priv = to_syscon_gpio(chip); unsigned int offs = priv->data->dat_bit_offset + offset; + if (priv->data->set) { + priv->data->set(chip, offset, val); + return; + } + regmap_update_bits(priv->syscon, (offs / SYSCON_REG_BITS) * SYSCON_REG_SIZE, BIT(offs % SYSCON_REG_BITS),