From patchwork Sun Jun 12 06:54:35 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshinori Sato X-Patchwork-Id: 9171399 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 D214660574 for ; Sun, 12 Jun 2016 06:58:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C2C1825D97 for ; Sun, 12 Jun 2016 06:58:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B7CE827C0C; Sun, 12 Jun 2016 06:58:36 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63EF125D97 for ; Sun, 12 Jun 2016 06:58:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932629AbcFLGzG (ORCPT ); Sun, 12 Jun 2016 02:55:06 -0400 Received: from mail2.asahi-net.or.jp ([202.224.39.198]:8960 "EHLO mail2.asahi-net.or.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751242AbcFLGyn (ORCPT ); Sun, 12 Jun 2016 02:54:43 -0400 Received: from sa76r4 (y081184.ppp.asahi-net.or.jp [118.243.81.184]) by mail2.asahi-net.or.jp (Postfix) with ESMTP id 6E7A319BD1; Sun, 12 Jun 2016 15:54:40 +0900 (JST) Received: from localhost (localhost [127.0.0.1]) by sa76r4 (Postfix) with ESMTP id 6692712A7D; Sun, 12 Jun 2016 15:54:40 +0900 (JST) X-Virus-Scanned: Debian amavisd-new at sa76r4.localdomain Received: from sa76r4 ([127.0.0.1]) by localhost (sa76r4.localdomain [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id h33Y54t2nTOV; Sun, 12 Jun 2016 15:54:40 +0900 (JST) Received: by sa76r4 (Postfix, from userid 1000) id 324B112A86; Sun, 12 Jun 2016 15:54:40 +0900 (JST) From: Yoshinori Sato To: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Cc: Yoshinori Sato Subject: [PATCH v2 17/17] sh: landisk CPLD interrupt controller driver Date: Sun, 12 Jun 2016 15:54:35 +0900 Message-Id: <1465714475-24111-18-git-send-email-ysato@users.sourceforge.jp> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1465714475-24111-1-git-send-email-ysato@users.sourceforge.jp> References: <1465714475-24111-1-git-send-email-ysato@users.sourceforge.jp> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Yoshinori Sato --- .../interrupt-controller/iodata-landisk.txt | 28 +++++++++ drivers/irqchip/irq-io-landisk.c | 72 ++++++++++++++++++++++ 2 files changed, 100 insertions(+) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt create mode 100644 drivers/irqchip/irq-io-landisk.c diff --git a/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt new file mode 100644 index 0000000..d398538 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/iodata-landisk.txt @@ -0,0 +1,28 @@ +DT bindings for the I/O DATA HDL-U interrupt controller + +Required properties: + + - compatible: has to be "iodata,landisk-intc". + + - reg: Base address and length of interrupt controller register. + + - interrupt-controller: Identifies the node as an interrupt controller. + + - #interrupt-cells: has to be <2>: an interrupt index and flags, as defined + in interrupts.txt in this directory. + + - interrupt-map: Interrupt mapping on parent controller. + +Example +------- + + cpldintc: cpld@b0000000 { + compatible = "iodata,landisk-intc"; + #interrupt-cells = <2>; + interrupt-controller; + reg = <0xb0000000 8>; + interrupt-map=<0 &shintc 0 0>, <1 &shintc 1 0>, + <2 &shintc 2 0>, <3 &shintc 3 0>, + <4 &shintc 4 0>, <5 &shintc 5 0>, + <6 &shintc 6 0>, <7 &shintc 7 0>; + }; diff --git a/drivers/irqchip/irq-io-landisk.c b/drivers/irqchip/irq-io-landisk.c new file mode 100644 index 0000000..973c4fb --- /dev/null +++ b/drivers/irqchip/irq-io-landisk.c @@ -0,0 +1,72 @@ +/* + * IO-DATA LANDISK CPLD IRQ driver + * + * Copyright 2016 Yoshinori Sato + */ + +#include +#include +#include +#include +#include +#include +#include + +static void landisk_mask_irq(struct irq_data *data) +{ + u8 mask = __raw_readb(data->chip_data + 5); + + mask &= !(1 << (data->irq - 5)); + __raw_writeb(mask, data->chip_data + 5); +} + +static void landisk_unmask_irq(struct irq_data *data) +{ + u8 mask = __raw_readb(data->chip_data + 5); + + mask |= (1 << (data->irq - 5)); + __raw_writeb(mask, data->chip_data + 5); +} + +static struct irq_chip cpld_irq_chip = { + .name = "LANDISK-CPLD", + .irq_unmask = landisk_unmask_irq, + .irq_mask = landisk_mask_irq, +}; + +static int cpld_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hw_irq_num) +{ + irq_set_chip_and_handler(virq, &cpld_irq_chip, + handle_simple_irq); + irq_set_chip_data(virq, d->host_data); + + return 0; +} + +static struct irq_domain_ops irq_ops = { + .xlate = irq_domain_xlate_twocell, + .map = cpld_map, +}; + +static int __init landisk_intc_of_init(struct device_node *intc, + struct device_node *parent) +{ + struct irq_domain *domain, *pdomain; + int num_irqpin; + void *baseaddr; + + baseaddr = of_iomap(intc, 0); + pdomain = irq_find_host(parent); + of_get_property(intc, "interrupt-map", &num_irqpin); + num_irqpin /= sizeof(u32) * 3; + domain = irq_domain_create_hierarchy(pdomain, 0, num_irqpin, + of_node_to_fwnode(intc), + &irq_ops, baseaddr); + if (!domain) + panic"%s: unable to create IRQ domain\n", intc->full_name); + irq_domain_associate_many(domain, 0, 0, 8); + return 0; +} + +IRQCHIP_DECLARE(cpld_intc, "iodata,landisk-intc", landisk_intc_of_init);