From patchwork Thu Dec 22 17:24:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 9485401 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 AB6FC601D2 for ; Thu, 22 Dec 2016 17:28:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9A9C226220 for ; Thu, 22 Dec 2016 17:28:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F71F28434; Thu, 22 Dec 2016 17:28:22 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1293326220 for ; Thu, 22 Dec 2016 17:28:14 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK77p-0001em-QO; Thu, 22 Dec 2016 17:25:53 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK77a-0001PD-Jv for linux-arm-kernel@lists.infradead.org; Thu, 22 Dec 2016 17:25:40 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id A42992070D; Thu, 22 Dec 2016 18:25:17 +0100 (CET) Received: from localhost (83.146.29.93.rev.sfr.net [93.29.146.83]) by mail.free-electrons.com (Postfix) with ESMTPSA id 75180206EB; Thu, 22 Dec 2016 18:25:17 +0100 (CET) From: Gregory CLEMENT To: Linus Walleij , linux-gpio@vger.kernel.org Subject: [PATCH 3/6] pinctrl: armada-37xx: Add gpio support Date: Thu, 22 Dec 2016 18:24:58 +0100 Message-Id: <20161222172501.16121-4-gregory.clement@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20161222172501.16121-1-gregory.clement@free-electrons.com> References: <20161222172501.16121-1-gregory.clement@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161222_092539_047187_D40B1C5B X-CRM114-Status: GOOD ( 15.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Petazzoni , Andrew Lunn , Jason Cooper , Hua Jing , Omri Itach , Nadav Haklai , Victor Gu , Gregory CLEMENT , Terry Zhou , Marcin Wojtas , Wilson Ding , linux-arm-kernel@lists.infradead.org, Sebastian Hesselbarth MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP GPIO management is pretty simple and is part of the same IP than the pin controller for the Armada 37xx SoCs. This patch adds the GPIO support to the pinctrl-armada-37xx.c file, it also allows sharing common functions between the gpiolib and the pinctrl drivers. Signed-off-by: Gregory CLEMENT --- drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 113 ++++++++++++++++++++++++++-- 1 file changed, 106 insertions(+), 7 deletions(-) diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c index 021bfe793af3..4d9571b49ad1 100644 --- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -10,6 +10,7 @@ * without any warranty of any kind, whether express or implied. */ +#include #include #include #include @@ -24,6 +25,8 @@ #include "../pinctrl-utils.h" #define OUTPUT_EN 0x0 +#define INPUT_VAL 0x10 +#define OUTPUT_VAL 0x18 #define OUTPUT_CTL 0x20 #define SELECTION 0x30 @@ -60,6 +63,7 @@ struct armada_37xx_pinctrl { struct regmap *regmap; struct armada_37xx_pin_data *data; struct device *dev; + struct gpio_chip gpio_chip; struct pinctrl_desc pctl; struct pinctrl_dev *pctl_dev; struct armada_37xx_pin_group *groups; @@ -297,9 +301,10 @@ static int armada_37xx_pmx_set(struct pinctrl_dev *pctldev, return armada_37xx_pmx_set_by_name(pctldev, name, grp); } -static int armada_37xx_pmx_direction_input(struct armada_37xx_pinctrl *info, - unsigned int offset) +static int armada_37xx_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) { + struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); unsigned int reg = OUTPUT_EN; unsigned int mask; @@ -312,11 +317,28 @@ static int armada_37xx_pmx_direction_input(struct armada_37xx_pinctrl *info, return regmap_update_bits(info->regmap, reg, mask, 0); } +static int armada_37xx_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); + unsigned int reg = OUTPUT_EN; + unsigned int val, mask; + + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + reg += sizeof(u32); + } + mask = BIT(offset); + + regmap_read(info->regmap, reg, &val); + return (val & mask) == 0; +} -static int armada_37xx_pmx_direction_output(struct armada_37xx_pinctrl *info, - unsigned int offset, int value) +static int armada_37xx_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) { + struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); unsigned int reg = OUTPUT_EN; unsigned int mask; @@ -329,19 +351,54 @@ static int armada_37xx_pmx_direction_output(struct armada_37xx_pinctrl *info, return regmap_update_bits(info->regmap, reg, mask, mask); } +static int armada_37xx_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); + unsigned int reg = INPUT_VAL; + unsigned int val, mask; + + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + reg += sizeof(u32); + } + mask = BIT(offset); + + regmap_read(info->regmap, reg, &val); + + return (val & mask) != 0; +} + +static void armada_37xx_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct armada_37xx_pinctrl *info = gpiochip_get_data(chip); + unsigned int reg = OUTPUT_VAL; + unsigned int mask, val; + + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + reg += sizeof(u32); + } + mask = BIT(offset); + val = value ? mask : 0; + + regmap_update_bits(info->regmap, reg, mask, val); +} + static int armada_37xx_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int offset, bool input) { struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *chip = range->gc; dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n", offset, range->name, offset, input ? "input" : "output"); if (input) - armada_37xx_pmx_direction_input(info, offset); + armada_37xx_gpio_direction_input(chip, offset); else - armada_37xx_pmx_direction_output(info, offset, 0); + armada_37xx_gpio_direction_output(chip, offset, 0); return 0; } @@ -371,6 +428,39 @@ static const struct pinmux_ops armada_37xx_pmx_ops = { .gpio_set_direction = armada_37xx_pmx_gpio_set_direction, }; +static const struct gpio_chip armada_37xx_gpiolib_chip = { + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .set = armada_37xx_gpio_set, + .get = armada_37xx_gpio_get, + .get_direction = armada_37xx_gpio_get_direction, + .direction_input = armada_37xx_gpio_direction_input, + .direction_output = armada_37xx_gpio_direction_output, + .owner = THIS_MODULE, +}; + +static int armada_37xx_gpiolib_register(struct platform_device *pdev, + struct armada_37xx_pinctrl *info) +{ + struct gpio_chip *gc; + int ret; + + info->gpio_chip = armada_37xx_gpiolib_chip; + + gc = &info->gpio_chip; + gc->ngpio = info->data->nr_pins; + gc->parent = &pdev->dev; + gc->base = -1; + gc->of_node = info->dev->of_node; + gc->label = info->data->name; + + ret = gpiochip_add_data(gc, info); + if (ret) + return ret; + + return 0; +} + static int _add_function(struct armada_37xx_pmx_func *funcs, int *funcsize, const char *name) { @@ -551,7 +641,7 @@ static int armada_37xx_pinctrl_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct regmap *regmap; - int ret; + int ret, pinbase = global_pin; info = devm_kzalloc(dev, sizeof(struct armada_37xx_pinctrl), GFP_KERNEL); @@ -570,10 +660,19 @@ static int armada_37xx_pinctrl_probe(struct platform_device *pdev) match = of_match_node(armada_37xx_pinctrl_of_match, np); info->data = (struct armada_37xx_pin_data *)match->data; + ret = armada_37xx_gpiolib_register(pdev, info); + if (ret) + return ret; + ret = armada_37xx_pinctrl_register(pdev, info); if (ret) return ret; + ret = gpiochip_add_pin_range(&info->gpio_chip, dev_name(dev), 0, + pinbase, info->data->nr_pins); + if (ret) + return ret; + platform_set_drvdata(pdev, info); return 0;