From patchwork Wed Aug 2 08:40:17 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Yan X-Patchwork-Id: 9876253 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 38F4F6037D for ; Wed, 2 Aug 2017 08:41:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 276292879E for ; Wed, 2 Aug 2017 08:41:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1BFFE28779; Wed, 2 Aug 2017 08:41:07 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CBB5628795 for ; Wed, 2 Aug 2017 08:41:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=cKccFS1w30qR5+FqzfU3dWMcEvAfdZiPpW4JYC3KGx0=; b=DRj5epLScueKHsK6XEf+yqlx3v h4PWZQ8T+r6QY7n5PUEWBtdVsYsQJ4RL2Va6QsEN8x5kMIwVvrzjFDtY7gaE2HCCMpNpibCKm6/Zt vd2cveHVgXupegV8n0KraGNQHdQCZo64B5mCddZI/BAFDyErzdtSZ7Rh3k8QG+hV0z+Z0ti5xCVJu uhhFtLF4kIcHr63K1gC+pn5zXo717KspZWbiNen2+4O1xc+ZYj1Rabm8QYFLQtM87oJni0/ie8r6W bMM77RjtE38XxI08nxFYbi4JlcnSy3h2YBHMyJ2+PVhEODwahjTye2Bu0xN18GjxaEftyWgS7VSb5 xAa1/M1A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dcpDF-0005LX-EE; Wed, 02 Aug 2017 08:41:05 +0000 Received: from regular1.263xmail.com ([211.150.99.134]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dcpCy-00057v-Ja; Wed, 02 Aug 2017 08:40:52 +0000 Received: from andy.yan?rock-chips.com (unknown [192.168.167.192]) by regular1.263xmail.com (Postfix) with ESMTP id 84FB1810B; Wed, 2 Aug 2017 16:40:24 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id 9E223308; Wed, 2 Aug 2017 16:40:23 +0800 (CST) X-RL-SENDER: andy.yan@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: andy.yan@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: yxj@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 314687USR82; Wed, 02 Aug 2017 16:40:25 +0800 (CST) From: Andy Yan To: heiko@sntech.de Subject: [PATCH v2 10/23] pinctrl: rockchip: add schmitt input mode support for rv1108 Date: Wed, 2 Aug 2017 16:40:17 +0800 Message-Id: <1501663217-12255-1-git-send-email-andy.yan@rock-chips.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1501662303-11687-1-git-send-email-andy.yan@rock-chips.com> References: <1501662303-11687-1-git-send-email-andy.yan@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170802_014050_659751_EDB1A8CA X-CRM114-Status: UNSURE ( 7.67 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-gpio@vger.kernel.org, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Andy Yan , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Some pins like i2c SCL/SDA need the schmitt input function to avoid crosstalk problems. Signed-off-by: Andy Yan Reviewed-by: Heiko Stuebner --- Changes in v2: None drivers/pinctrl/pinctrl-rockchip.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c index e831647..868cb9c 100644 --- a/drivers/pinctrl/pinctrl-rockchip.c +++ b/drivers/pinctrl/pinctrl-rockchip.c @@ -1084,6 +1084,36 @@ static void rv1108_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank, *bit *= RV1108_DRV_BITS_PER_PIN; } +#define RV1108_SCHMITT_PMU_OFFSET 0x30 +#define RV1108_SCHMITT_GRF_OFFSET 0x388 +#define RV1108_SCHMITT_BANK_STRIDE 8 +#define RV1108_SCHMITT_PINS_PER_GRF_REG 16 +#define RV1108_SCHMITT_PINS_PER_PMU_REG 8 + +static int rv1108_calc_schmitt_reg_and_bit(struct rockchip_pin_bank *bank, + int pin_num, + struct regmap **regmap, + int *reg, u8 *bit) +{ + struct rockchip_pinctrl *info = bank->drvdata; + int pins_per_reg; + + if (bank->bank_num == 0) { + *regmap = info->regmap_pmu; + *reg = RV1108_SCHMITT_PMU_OFFSET; + pins_per_reg = RV1108_SCHMITT_PINS_PER_PMU_REG; + } else { + *regmap = info->regmap_base; + *reg = RV1108_SCHMITT_GRF_OFFSET; + pins_per_reg = RV1108_SCHMITT_PINS_PER_GRF_REG; + *reg += (bank->bank_num - 1) * RV1108_SCHMITT_BANK_STRIDE; + } + *reg += ((pin_num / pins_per_reg) * 4); + *bit = pin_num % pins_per_reg; + + return 0; +} + #define RK2928_PULL_OFFSET 0x118 #define RK2928_PULL_PINS_PER_REG 16 #define RK2928_PULL_BANK_STRIDE 8 @@ -3017,6 +3047,7 @@ static struct rockchip_pin_ctrl rv1108_pin_ctrl = { .pmu_mux_offset = 0x0, .pull_calc_reg = rv1108_calc_pull_reg_and_bit, .drv_calc_reg = rv1108_calc_drv_reg_and_bit, + .schmitt_calc_reg = rv1108_calc_schmitt_reg_and_bit, }; static struct rockchip_pin_bank rk2928_pin_banks[] = {