From patchwork Thu Aug 3 11:06:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 9878723 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 17C08603B4 for ; Thu, 3 Aug 2017 11:07:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC919288AA for ; Thu, 3 Aug 2017 11:07:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D7E6B288B2; Thu, 3 Aug 2017 11:07:18 +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=ham 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 0EABF288AA for ; Thu, 3 Aug 2017 11:07:16 +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: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:In-Reply-To: References:List-Owner; bh=48i9IcDy3pCxQ2TSP96czOsnCBxlhlPycnuzdLanTuA=; b=tVo HR0cWfeHRfQFCzG4hwh6Nl/UWNsmMsDEXLIHgqXaFJg/Vnc3/XBP2ZJO3J9/+JSUW/m5z+EgdiqYG YYvnJflwN0v0KxjCPr/2qsd5u5Kb4QqeoEX0KxY7R74Dw8wgvHNZxA/IyTSSAiCsMeO/h7ZB0+vSt eawZ4l6t8VQyQlq0zH6DvpbhkElCsS2nJfwGsyWXkTDODBP+Xfl/MQkxDuxaDHIoQyQUQlajhb2zA mGEfD8Y7Uvb5MV83+jxNHXpgtKDus/RJp8KYXYl/REkwSrQOGxCp4geJBzk+rbCTOqelmvoKf9cwT 2ycWE1ORda0hcPPY8KIp8eXM5Y3t5ww==; 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 1ddDyG-0004kr-Ht; Thu, 03 Aug 2017 11:07:16 +0000 Received: from conuserg-11.nifty.com ([210.131.2.78]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1ddDyC-0004ij-3h for linux-arm-kernel@lists.infradead.org; Thu, 03 Aug 2017 11:07:15 +0000 Received: from pug.e01.socionext.com (p14092-ipngnfx01kyoto.kyoto.ocn.ne.jp [153.142.97.92]) (authenticated) by conuserg-11.nifty.com with ESMTP id v73B6HhF004110; Thu, 3 Aug 2017 20:06:18 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-11.nifty.com v73B6HhF004110 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1501758378; bh=ev58seReQfwfAUei673mCmx5Y4mnX6uVjCAxjOuRkHQ=; h=From:To:Cc:Subject:Date:From; b=25SP+tfd573dOszWVwdVnN6YQJxpg7pAZUTjl6idMuPXquaGANnuUj1O8yCiQ7OSK 8DdLWRzsPYBUgPo/CGw4Zxg0DiBcv31konXHR5itYWN0Fm5+h2LnvI3Rpb/I0MPbUJ QXdDL1/gyXrSkPK7w0flOf1m6ItBdhZq0Wtoxbw4wYE4XKRQ0wmAtaLGI4W2rrZa13 SWLBTjtO5pl7fkEEmpXP6A4WgZPaNP2VZRcwhmBNO07QITQCc+JE9LqzI61iDY8Xz4 Wrthv9BqP3wbOLkdCyRGtjweQrcyGa01mZch+UgXz6VkEacOjb00r2F/ITabOh3++A 5ELl6ty0FGOqw== X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-gpio@vger.kernel.org Subject: [PATCH] gpio: uniphier: add UniPhier GPIO controller driver Date: Thu, 3 Aug 2017 20:06:11 +0900 Message-Id: <1501758371-25316-1-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170803_040712_500164_EE93C94E X-CRM114-Status: GOOD ( 24.66 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Masahiro Yamada , Linus Walleij , linux-kernel@vger.kernel.org, Jassi Brar , Rob Herring , Masami Hiramatsu , linux-arm-kernel@lists.infradead.org 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 This GPIO controller device is used on UniPhier SoCs. Signed-off-by: Masahiro Yamada --- .../devicetree/bindings/gpio/gpio-uniphier.txt | 41 ++ MAINTAINERS | 1 + drivers/gpio/Kconfig | 7 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-uniphier.c | 595 +++++++++++++++++++++ include/dt-bindings/gpio/uniphier-gpio.h | 18 + 6 files changed, 663 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-uniphier.txt create mode 100644 drivers/gpio/gpio-uniphier.c create mode 100644 include/dt-bindings/gpio/uniphier-gpio.h diff --git a/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt b/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt new file mode 100644 index 000000000000..59af5bdb5035 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt @@ -0,0 +1,41 @@ +UniPhier GPIO controller + +Required properties: +- compatible: Should be one of the following: + "socionext,uniphier-ld4-gpio" - for LD4 SoC + "socionext,uniphier-pro4-gpio" - for Pro4 SoC + "socionext,uniphier-sld8-gpio" - for sLD8 SoC + "socionext,uniphier-pro5-gpio" - for Pro5 SoC + "socionext,uniphier-pxs2-gpio" - for PXs2/LD6b SoC + "socionext,uniphier-ld11-gpio" - for LD11 SoC + "socionext,uniphier-ld20-gpio" - for LD20 SoC + "socionext,uniphier-pxs3-gpio" - for PXs3 SoC +- reg: Specifies offset and length of the register set for the device. +- gpio-controller: Marks the device node as a GPIO controller. +- #gpio-cells: Should be 2. The first cell is the pin number and the second + cell is used to specify optional parameters +- interrupt-controller: Marks the device node as an interrupt controller +- #interrupt-cells: Should be 2. The first cell defines the interrupt number. + The second cell bits[3:0] is used to specify trigger type as follows: + 1 = low-to-high edge triggered + 2 = high-to-low edge triggered + 4 = active high level-sensitive + 8 = active low level-sensitive + Valid combinations are 1, 2, 3, 4, 8. +- gpio-ranges: Mapping to pin controller pins (as described in gpio.txt) + +Optional properties: +- gpio-ranges-group-names: Used for named gpio ranges (as described in gpio.txt) + +Example: + gpio: gpio@55000000 { + compatible = "socionext,uniphier-pro4-gpio"; + reg = <0x55000000 0x200>; + interrupt-parent = <&aidet>; + interrupt-controller; + #interrupt-cells = <2>; + gpio-controller; + #gpio-cells = <3>; + gpio-ranges = <&pinctrl 0 0 0>; + gpio-ranges-group-names = "gpio_range"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 26b3d10b7344..7b0dce1c75e8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1992,6 +1992,7 @@ F: arch/arm/mm/cache-uniphier.c F: arch/arm64/boot/dts/socionext/ F: drivers/bus/uniphier-system-bus.c F: drivers/clk/uniphier/ +F: drivers/gpio/gpio-uniphier.c F: drivers/i2c/busses/i2c-uniphier* F: drivers/irqchip/irq-uniphier-aidet.c F: drivers/pinctrl/uniphier/ diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 461d6fc3688b..5f6d2e984bb6 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -465,6 +465,13 @@ config GPIO_TZ1090_PDC help Say yes here to support Toumaz Xenif TZ1090 PDC GPIOs. +config GPIO_UNIPHIER + tristate "UniPhier GPIO support" + depends on ARCH_UNIPHIER + depends on OF_GPIO + help + Say yes here to support UniPhier GPIOs. + config GPIO_VF610 def_bool y depends on ARCH_MXC && SOC_VF610 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index a9fda6c55113..1de9fdb8cff9 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -129,6 +129,7 @@ obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o obj-$(CONFIG_GPIO_TZ1090) += gpio-tz1090.o obj-$(CONFIG_GPIO_TZ1090_PDC) += gpio-tz1090-pdc.o obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o +obj-$(CONFIG_GPIO_UNIPHIER) += gpio-uniphier.o obj-$(CONFIG_GPIO_VF610) += gpio-vf610.o obj-$(CONFIG_GPIO_VIPERBOARD) += gpio-viperboard.o obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o diff --git a/drivers/gpio/gpio-uniphier.c b/drivers/gpio/gpio-uniphier.c new file mode 100644 index 000000000000..dcb9c16c8408 --- /dev/null +++ b/drivers/gpio/gpio-uniphier.c @@ -0,0 +1,595 @@ +/* + * Copyright (C) 2017 Socionext Inc. + * Author: Masahiro Yamada + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define UNIPHIER_GPIO_BANK_MASK \ + GENMASK((UNIPHIER_GPIO_LINES_PER_BANK) - 1, 0) + +#define UNIPHIER_GPIO_IRQ_NUM 24 + +#define UNIPHIER_GPIO_PORT_DATA 0x0 /* data */ +#define UNIPHIER_GPIO_PORT_DIR 0x4 /* direction (1:in, 0:out) */ +#define UNIPHIER_GPIO_IRQ_EN 0x90 /* irq enable */ +#define UNIPHIER_GPIO_IRQ_MODE 0x94 /* irq mode (1: both edge) */ +#define UNIPHIER_GPIO_IRQ_FLT_EN 0x98 /* noise filter enable */ +#define UNIPHIER_GPIO_IRQ_FLT_CYC 0x9c /* noise filter clock cycle */ + +struct uniphier_gpio_socdata { + unsigned int ngpio; + bool (*is_valid_irq)(unsigned int hwirq); + bool (*is_input_only)(unsigned int offset); +}; + +struct uniphier_gpio_priv { + struct gpio_chip chip; + struct irq_chip irq_chip; + struct irq_domain *irq_domain; + const struct uniphier_gpio_socdata *socdata; + void __iomem *regs; + spinlock_t lock; + u32 saved_vals[0]; +}; + +static unsigned int uniphier_gpio_bank_to_reg(unsigned int bank) +{ + unsigned int reg; + + reg = (bank + 1) * 8; + + /* + * Unfortunately, the GPIO port registers are not contiguous because + * offset 0x90-0x9f is used for IRQ. Add 0x10 when crossing the region. + */ + if (reg >= UNIPHIER_GPIO_IRQ_EN) + reg += 0x10; + + return reg; +} + +static void uniphier_gpio_get_bank_and_mask(unsigned int offset, + unsigned int *bank, u32 *mask) +{ + *bank = offset / UNIPHIER_GPIO_LINES_PER_BANK; + *mask = BIT(offset % UNIPHIER_GPIO_LINES_PER_BANK); +} + +static void uniphier_gpio_reg_update(struct uniphier_gpio_priv *priv, + unsigned int reg, u32 mask, u32 val) +{ + unsigned long flags; + u32 tmp; + + spin_lock_irqsave(&priv->lock, flags); + tmp = readl(priv->regs + reg); + tmp &= ~mask; + tmp |= mask & val; + writel(tmp, priv->regs + reg); + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void uniphier_gpio_bank_write(struct gpio_chip *chip, unsigned int bank, + unsigned int reg, u32 mask, u32 val) +{ + struct uniphier_gpio_priv *priv = gpiochip_get_data(chip); + + if (!mask) + return; + + uniphier_gpio_reg_update(priv, uniphier_gpio_bank_to_reg(bank) + reg, + mask, val); +} + +static void uniphier_gpio_offset_write(struct gpio_chip *chip, + unsigned int offset, unsigned int reg, + int val) +{ + unsigned int bank; + u32 mask; + + uniphier_gpio_get_bank_and_mask(offset, &bank, &mask); + + uniphier_gpio_bank_write(chip, bank, reg, mask, val ? mask : 0); +} + +static int uniphier_gpio_offset_read(struct gpio_chip *chip, + unsigned int offset, unsigned int reg) +{ + struct uniphier_gpio_priv *priv = gpiochip_get_data(chip); + unsigned int bank, reg_offset; + u32 mask; + + uniphier_gpio_get_bank_and_mask(offset, &bank, &mask); + reg_offset = uniphier_gpio_bank_to_reg(bank) + reg; + + return !!(readl(priv->regs + reg_offset) & mask); +} + +static int uniphier_gpio_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + return uniphier_gpio_offset_read(chip, offset, UNIPHIER_GPIO_PORT_DIR); +} + +static int uniphier_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + uniphier_gpio_offset_write(chip, offset, UNIPHIER_GPIO_PORT_DIR, 1); + + return 0; +} + +static int uniphier_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int val) +{ + struct uniphier_gpio_priv *priv = gpiochip_get_data(chip); + + if (priv->socdata->is_input_only && + priv->socdata->is_input_only(offset)) { + dev_err(chip->parent, "GPIO%d is input only port\n", offset); + return -EINVAL; + } + + uniphier_gpio_offset_write(chip, offset, UNIPHIER_GPIO_PORT_DATA, val); + uniphier_gpio_offset_write(chip, offset, UNIPHIER_GPIO_PORT_DIR, 0); + + return 0; +} + +static int uniphier_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + return uniphier_gpio_offset_read(chip, offset, UNIPHIER_GPIO_PORT_DATA); +} + +static void uniphier_gpio_set(struct gpio_chip *chip, + unsigned int offset, int val) +{ + uniphier_gpio_offset_write(chip, offset, UNIPHIER_GPIO_PORT_DATA, val); +} + +static void uniphier_gpio_set_multiple(struct gpio_chip *chip, + unsigned long *mask, unsigned long *bits) +{ + unsigned int bank, shift, bank_mask, bank_bits; + int i; + + for (i = 0; i < chip->ngpio; i += UNIPHIER_GPIO_LINES_PER_BANK) { + bank = i / UNIPHIER_GPIO_LINES_PER_BANK; + shift = i % BITS_PER_LONG; + bank_mask = (mask[BIT_WORD(i)] >> shift) & + UNIPHIER_GPIO_BANK_MASK; + bank_bits = bits[BIT_WORD(i)] >> shift; + + uniphier_gpio_bank_write(chip, bank, UNIPHIER_GPIO_PORT_DATA, + bank_mask, bank_bits); + } +} + +static int uniphier_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct irq_fwspec fwspec; + + if (offset < UNIPHIER_GPIO_IRQ_OFFSET) + return -ENXIO; + + fwspec.fwnode = of_node_to_fwnode(chip->parent->of_node); + fwspec.param_count = 2; + fwspec.param[0] = offset - UNIPHIER_GPIO_IRQ_OFFSET; + fwspec.param[1] = IRQ_TYPE_NONE; + + return irq_create_fwspec_mapping(&fwspec); +} + +static void uniphier_gpio_irq_mask(struct irq_data *data) +{ + struct uniphier_gpio_priv *priv = data->chip_data; + u32 mask = BIT(data->hwirq); + + uniphier_gpio_reg_update(priv, UNIPHIER_GPIO_IRQ_EN, mask, 0); + + return irq_chip_mask_parent(data); +} + +static void uniphier_gpio_irq_unmask(struct irq_data *data) +{ + struct uniphier_gpio_priv *priv = data->chip_data; + u32 mask = BIT(data->hwirq); + + uniphier_gpio_reg_update(priv, UNIPHIER_GPIO_IRQ_EN, mask, mask); + + return irq_chip_unmask_parent(data); +} + +static int uniphier_gpio_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct uniphier_gpio_priv *priv = data->chip_data; + u32 mask = BIT(data->hwirq); + u32 val = 0; + + if (type == IRQ_TYPE_EDGE_BOTH) { + val = mask; + type = IRQ_TYPE_EDGE_FALLING; + } + + uniphier_gpio_reg_update(priv, UNIPHIER_GPIO_IRQ_MODE, mask, val); + /* To enable both edge detection, the noise filter must be enabled. */ + uniphier_gpio_reg_update(priv, UNIPHIER_GPIO_IRQ_FLT_EN, mask, val); + + return irq_chip_set_type_parent(data, type); +} + +static int uniphier_gpio_irq_translate(struct irq_domain *domain, + struct irq_fwspec *fwspec, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + + if (WARN_ON(fwspec->param_count < 2)) + return -EINVAL; + + *out_hwirq = fwspec->param[0]; + *out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static const u32 uniphier_gpio_irq_parent_hwirqs[] = { + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, + 186, 187, 188, 189, 190, 249, 250, 251, +}; + +static int uniphier_gpio_irq_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + struct uniphier_gpio_priv *priv = domain->host_data; + irq_hw_number_t hwirq; + unsigned int type; + int i, ret; + + ret = uniphier_gpio_irq_translate(domain, arg, &hwirq, &type); + if (ret) + return ret; + + if (!priv->socdata->is_valid_irq(hwirq)) + return -ENXIO; + + for (i = 0; i < nr_irqs; i++) { + struct irq_fwspec parent_fwspec; + + ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq, + &priv->irq_chip, priv); + if (ret) + return ret; + + if (hwirq >= ARRAY_SIZE(uniphier_gpio_irq_parent_hwirqs)) + return -EINVAL; + + /* parent is UniPhier AIDET */ + parent_fwspec.fwnode = domain->parent->fwnode; + parent_fwspec.param_count = 2; + parent_fwspec.param[0] = uniphier_gpio_irq_parent_hwirqs[hwirq]; + parent_fwspec.param[1] = type; + + ret = irq_domain_alloc_irqs_parent(domain, virq, 1, + &parent_fwspec); + if (ret) + return ret; + + virq++; + hwirq++; + } + + return 0; +} + +static void uniphier_gpio_irq_activate(struct irq_domain *domain, + struct irq_data *data) +{ + struct uniphier_gpio_priv *priv = domain->host_data; + struct gpio_chip *chip = &priv->chip; + + gpiochip_lock_as_irq(chip, data->hwirq + UNIPHIER_GPIO_IRQ_OFFSET); +} + +static void uniphier_gpio_irq_deactivate(struct irq_domain *domain, + struct irq_data *data) +{ + struct uniphier_gpio_priv *priv = domain->host_data; + struct gpio_chip *chip = &priv->chip; + + gpiochip_unlock_as_irq(chip, data->hwirq + UNIPHIER_GPIO_IRQ_OFFSET); +} + +static const struct irq_domain_ops uniphier_gpio_irq_ops = { + .alloc = uniphier_gpio_irq_alloc, + .free = irq_domain_free_irqs_common, + .activate = uniphier_gpio_irq_activate, + .deactivate = uniphier_gpio_irq_deactivate, + .translate = uniphier_gpio_irq_translate, +}; + +static void uniphier_gpio_hw_init(struct uniphier_gpio_priv *priv) +{ + /* + * To detect both edge interrupts, the noise filter must be enabled. + * This filter is intended to remove the noise from the irq lines. + * It does not work for GPIO input, so GPIO debounce is not supported. + * Unfortunately, the filter period is shared among all irq lines. + * Just choose a sensible period here. + */ + writel(0xff, priv->regs + UNIPHIER_GPIO_IRQ_FLT_CYC); +} + +static int uniphier_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *parent_np; + struct irq_domain *parent_domain; + struct uniphier_gpio_priv *priv; + const struct uniphier_gpio_socdata *data; + struct gpio_chip *chip; + struct irq_chip *irq_chip; + struct resource *regs; + unsigned int nregs; + int ret; + + parent_np = of_irq_find_parent(dev->of_node); + if (!parent_np) + return -ENXIO; + + parent_domain = irq_find_host(parent_np); + of_node_put(parent_np); + if (!parent_domain) + return -EPROBE_DEFER; + + BUILD_BUG_ON(ARRAY_SIZE(uniphier_gpio_irq_parent_hwirqs) > + UNIPHIER_GPIO_IRQ_NUM); + + data = of_device_get_match_data(dev); + if (WARN_ON(!data || !data->is_valid_irq)) + return -EINVAL; + + nregs = DIV_ROUND_UP(data->ngpio, UNIPHIER_GPIO_LINES_PER_BANK) * 2 + 3; + priv = devm_kzalloc(dev, + sizeof(*priv) + sizeof(priv->saved_vals[0]) * nregs, + GFP_KERNEL); + if (!priv) + return -ENOMEM; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->regs = devm_ioremap_resource(dev, regs); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + spin_lock_init(&priv->lock); + priv->socdata = data; + + chip = &priv->chip; + chip->label = dev_name(dev); + chip->parent = dev; + chip->request = gpiochip_generic_request; + chip->free = gpiochip_generic_free; + chip->get_direction = uniphier_gpio_get_direction; + chip->direction_input = uniphier_gpio_direction_input; + chip->direction_output = uniphier_gpio_direction_output; + chip->get = uniphier_gpio_get; + chip->set = uniphier_gpio_set; + chip->set_multiple = uniphier_gpio_set_multiple; + chip->to_irq = uniphier_gpio_to_irq; + chip->base = -1; + chip->ngpio = data->ngpio; + + irq_chip = &priv->irq_chip; + irq_chip->name = dev_name(dev); + irq_chip->irq_mask = uniphier_gpio_irq_mask; + irq_chip->irq_unmask = uniphier_gpio_irq_unmask; + irq_chip->irq_eoi = irq_chip_eoi_parent; + irq_chip->irq_set_type = uniphier_gpio_irq_set_type; + + uniphier_gpio_hw_init(priv); + + ret = devm_gpiochip_add_data(dev, chip, priv); + if (ret) + return ret; + + priv->irq_domain = irq_domain_add_hierarchy(parent_domain, 0, + UNIPHIER_GPIO_IRQ_NUM, + dev->of_node, + &uniphier_gpio_irq_ops, + priv); + if (!priv->irq_domain) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + + return 0; +} + +static int uniphier_gpio_remove(struct platform_device *pdev) +{ + struct uniphier_gpio_priv *priv = platform_get_drvdata(pdev); + + irq_domain_remove(priv->irq_domain); + + return 0; +} + +static int __maybe_unused uniphier_gpio_suspend(struct device *dev) +{ + struct uniphier_gpio_priv *priv = dev_get_drvdata(dev); + u32 *val = priv->saved_vals; + unsigned int reg; + int i; + + for (i = 0; i < priv->chip.ngpio; i += UNIPHIER_GPIO_LINES_PER_BANK) { + reg = uniphier_gpio_bank_to_reg(i); + + *val++ = readl(priv->regs + reg + UNIPHIER_GPIO_PORT_DATA); + *val++ = readl(priv->regs + reg + UNIPHIER_GPIO_PORT_DIR); + } + + *val++ = readl(priv->regs + UNIPHIER_GPIO_IRQ_EN); + *val++ = readl(priv->regs + UNIPHIER_GPIO_IRQ_MODE); + *val++ = readl(priv->regs + UNIPHIER_GPIO_IRQ_FLT_EN); + + return 0; +} + +static int __maybe_unused uniphier_gpio_resume(struct device *dev) +{ + struct uniphier_gpio_priv *priv = dev_get_drvdata(dev); + const u32 *val = priv->saved_vals; + unsigned int reg; + int i; + + for (i = 0; i < priv->chip.ngpio; i += UNIPHIER_GPIO_LINES_PER_BANK) { + reg = uniphier_gpio_bank_to_reg(i); + + writel(*val++, priv->regs + reg + UNIPHIER_GPIO_PORT_DATA); + writel(*val++, priv->regs + reg + UNIPHIER_GPIO_PORT_DIR); + } + + writel(*val++, priv->regs + UNIPHIER_GPIO_IRQ_EN); + writel(*val++, priv->regs + UNIPHIER_GPIO_IRQ_MODE); + writel(*val++, priv->regs + UNIPHIER_GPIO_IRQ_FLT_EN); + + uniphier_gpio_hw_init(priv); + + return 0; +} + +static const struct dev_pm_ops uniphier_gpio_pm_ops = { + SET_LATE_SYSTEM_SLEEP_PM_OPS(uniphier_gpio_suspend, + uniphier_gpio_resume) +}; + +static bool uniphier_ld4_gpio_is_valid_irq(unsigned int hwirq) +{ + return hwirq < 16 && hwirq != 13; +} + +static const struct uniphier_gpio_socdata uniphier_ld4_gpio_data = { + .ngpio = 136, + .is_valid_irq = uniphier_ld4_gpio_is_valid_irq, +}; + +static bool uniphier_pro4_gpio_is_valid_irq(unsigned int hwirq) +{ + return hwirq < 21; +} + +static const struct uniphier_gpio_socdata uniphier_pro4_gpio_data = { + .ngpio = 248, + .is_valid_irq = uniphier_pro4_gpio_is_valid_irq, +}; + +static bool uniphier_pxs2_gpio_is_valid_irq(unsigned int hwirq) +{ + return hwirq < 24; +} + +static const struct uniphier_gpio_socdata uniphier_pxs2_gpio_data = { + .ngpio = 232, + .is_valid_irq = uniphier_pxs2_gpio_is_valid_irq, +}; + +static bool uniphier_ld11_gpio_is_input_only(unsigned int offset) +{ + return offset >= 144 && offset <= 151; +} + +static const struct uniphier_gpio_socdata uniphier_ld11_gpio_data = { + .ngpio = 200, + .is_valid_irq = uniphier_pxs2_gpio_is_valid_irq, + .is_input_only = uniphier_ld11_gpio_is_input_only, +}; + +static const struct uniphier_gpio_socdata uniphier_ld20_gpio_data = { + .ngpio = 205, + .is_valid_irq = uniphier_pxs2_gpio_is_valid_irq, + .is_input_only = uniphier_ld11_gpio_is_input_only, +}; + +static bool uniphier_pxs3_gpio_is_input_only(unsigned int offset) +{ + return offset >= 144 && offset <= 161; +} + +static const struct uniphier_gpio_socdata uniphier_pxs3_gpio_data = { + .ngpio = 286, + .is_valid_irq = uniphier_pxs2_gpio_is_valid_irq, + .is_input_only = uniphier_pxs3_gpio_is_input_only, +}; + +static const struct of_device_id uniphier_gpio_match[] = { + { + .compatible = "socionext,uniphier-ld4-gpio", + .data = &uniphier_ld4_gpio_data, + }, + { + .compatible = "socionext,uniphier-pro4-gpio", + .data = &uniphier_pro4_gpio_data, + }, + { + .compatible = "socionext,uniphier-sld8-gpio", + .data = &uniphier_ld4_gpio_data, + }, + { + .compatible = "socionext,uniphier-pro5-gpio", + .data = &uniphier_pro4_gpio_data, + }, + { + .compatible = "socionext,uniphier-pxs2-gpio", + .data = &uniphier_pxs2_gpio_data, + }, + { + .compatible = "socionext,uniphier-ld11-gpio", + .data = &uniphier_ld11_gpio_data, + }, + { + .compatible = "socionext,uniphier-ld20-gpio", + .data = &uniphier_ld20_gpio_data, + }, + { + .compatible = "socionext,uniphier-pxs3-gpio", + .data = &uniphier_pxs3_gpio_data, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, uniphier_gpio_match); + +static struct platform_driver uniphier_gpio_driver = { + .probe = uniphier_gpio_probe, + .remove = uniphier_gpio_remove, + .driver = { + .name = "uniphier-gpio", + .of_match_table = uniphier_gpio_match, + .pm = &uniphier_gpio_pm_ops, + }, +}; +module_platform_driver(uniphier_gpio_driver); + +MODULE_AUTHOR("Masahiro Yamada "); +MODULE_DESCRIPTION("UniPhier GPIO driver"); +MODULE_LICENSE("GPL"); diff --git a/include/dt-bindings/gpio/uniphier-gpio.h b/include/dt-bindings/gpio/uniphier-gpio.h new file mode 100644 index 000000000000..9f0ad174f61c --- /dev/null +++ b/include/dt-bindings/gpio/uniphier-gpio.h @@ -0,0 +1,18 @@ +/* + * Copyright (C) 2017 Socionext Inc. + * Author: Masahiro Yamada + */ + +#ifndef _DT_BINDINGS_GPIO_UNIPHIER_H +#define _DT_BINDINGS_GPIO_UNIPHIER_H + +#define UNIPHIER_GPIO_LINES_PER_BANK 8 + +#define UNIPHIER_GPIO_IRQ_OFFSET ((UNIPHIER_GPIO_LINES_PER_BANK) * 15) + +#define UNIPHIER_GPIO_PORT(bank, line) \ + ((UNIPHIER_GPIO_LINES_PER_BANK) * (bank) + (line)) + +#define UNIPHIER_GPIO_IRQ(n) ((UNIPHIER_GPIO_IRQ_OFFSET) + (n)) + +#endif /* _DT_BINDINGS_GPIO_UNIPHIER_H */