From patchwork Thu Aug 16 12:13:15 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 1331101 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id BCDCA40210 for ; Thu, 16 Aug 2012 12:13:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754140Ab2HPMNL (ORCPT ); Thu, 16 Aug 2012 08:13:11 -0400 Received: from na3sys009aog114.obsmtp.com ([74.125.149.211]:52445 "EHLO na3sys009aog114.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753855Ab2HPMNK (ORCPT ); Thu, 16 Aug 2012 08:13:10 -0400 Received: from mail-ob0-f174.google.com ([209.85.214.174]) (using TLSv1) by na3sys009aob114.postini.com ([74.125.148.12]) with SMTP ID DSNKUCzj1cqZsIwukPY7YhlLk/e6RZb41dhC@postini.com; Thu, 16 Aug 2012 05:13:10 PDT Received: by obbuo13 with SMTP id uo13so4143677obb.33 for ; Thu, 16 Aug 2012 05:13:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=2ibyZ8jfROTC0fJhNs4fI7xxX4eqbI5HiEaSkedBkJM=; b=jdhrLd5rlgEYIk+vnz8UFaWN5bgpMVBO0+sA1JYscZHO+XS4f082wgLqX/fYeQar/p 9feWKdDxVm3CKcY7Ky7WuZacJwiDqIMwWewebG1MqTpMZlZxnq22uliImtkrj2JJVky3 pcdr0Zbg+MxOndrHHBz39SC0kaIobadwl6dYzPSuHqXKRTgQzV1RvvJWqGr7hUrTukbN teq7SbfDQj10NrnI6ss9hEqVF5okXJiEROZDBNAipOKstQQIg26cwyoeIdId3J/ecar0 s3R64JfCByBpQvNSZNvvnQ8DePEMuMfyK2u6gLgsAXC09TGEj96JlMpoRu1DQYDHez00 JIYg== Received: by 10.182.110.37 with SMTP id hx5mr729025obb.48.1345119189307; Thu, 16 Aug 2012 05:13:09 -0700 (PDT) Received: from barack.emea.dhcp.ti.com (dragon.ti.com. [192.94.94.33]) by mx.google.com with ESMTPS id o4sm2858363oef.11.2012.08.16.05.13.06 (version=SSLv3 cipher=OTHER); Thu, 16 Aug 2012 05:13:08 -0700 (PDT) From: Peter Ujfalusi To: Samuel Ortiz , Grant Likely , Linus Walleij Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, devicetree-discuss@lists.ozlabs.org, peter.ujfalusi@ti.com, Sergio Aguirre Subject: [PATCH v2 3/3] gpio: Add basic support for TWL6040 GPOs Date: Thu, 16 Aug 2012 15:13:15 +0300 Message-Id: <1345119195-7490-4-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.7.8.6 In-Reply-To: <1345119195-7490-1-git-send-email-peter.ujfalusi@ti.com> References: <1345119195-7490-1-git-send-email-peter.ujfalusi@ti.com> X-Gm-Message-State: ALoCoQkMOxHRWM4uyIgfs7pLSjXty6kG/xvO1I9iFfUoPn5KL7/F+MjZ5irzOsg5H/B0eJruFpuP Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org TWL6040 provides GPO lines to be used for controlling external devices.The number of lines different between versions: twl6040 have 3 GPO while TWL6041 have 1. Signed-off-by: Sergio Aguirre Signed-off-by: Peter Ujfalusi Acked-by: Linus Walleij --- drivers/gpio/Kconfig | 7 ++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-twl6040.c | 137 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 145 insertions(+), 0 deletions(-) create mode 100644 drivers/gpio/gpio-twl6040.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index b16c8a7..f74633e 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -402,6 +402,13 @@ config GPIO_TWL4030 Say yes here to access the GPIO signals of various multi-function power management chips from Texas Instruments. +config GPIO_TWL6040 + tristate "TWL6040 GPO" + depends on TWL6040_CORE + help + Say yes here to access the GPO signals of twl6040 + audio chip from Texas Instruments. + config GPIO_WM831X tristate "WM831x GPIOs" depends on MFD_WM831X diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 153cace..f857b46 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -67,6 +67,7 @@ obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o +obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o diff --git a/drivers/gpio/gpio-twl6040.c b/drivers/gpio/gpio-twl6040.c new file mode 100644 index 0000000..dd58e8b --- /dev/null +++ b/drivers/gpio/gpio-twl6040.c @@ -0,0 +1,137 @@ +/* + * Access to GPOs on TWL6040 chip + * + * Copyright (C) 2012 Texas Instruments, Inc. + * + * Authors: + * Sergio Aguirre + * Peter Ujfalusi + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct gpio_chip twl6040gpo_chip; + +static int twl6040gpo_get(struct gpio_chip *chip, unsigned offset) +{ + struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent); + int ret = 0; + + ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL); + if (ret < 0) + return ret; + + return (ret >> offset) & 1; +} + +static int twl6040gpo_direction_out(struct gpio_chip *chip, unsigned offset, + int value) +{ + /* This only drives GPOs, and can't change direction */ + return 0; +} + +static void twl6040gpo_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct twl6040 *twl6040 = dev_get_drvdata(chip->dev->parent); + int ret; + u8 gpoctl; + + ret = twl6040_reg_read(twl6040, TWL6040_REG_GPOCTL); + if (ret < 0) + return; + + if (value) + gpoctl = ret | (1 << offset); + else + gpoctl = ret & ~(1 << offset); + + twl6040_reg_write(twl6040, TWL6040_REG_GPOCTL, gpoctl); +} + +static struct gpio_chip twl6040gpo_chip = { + .label = "twl6040", + .owner = THIS_MODULE, + .get = twl6040gpo_get, + .direction_output = twl6040gpo_direction_out, + .set = twl6040gpo_set, + .can_sleep = 1, +}; + +/*----------------------------------------------------------------------*/ + +static int __devinit gpo_twl6040_probe(struct platform_device *pdev) +{ + struct twl6040_gpo_data *pdata = pdev->dev.platform_data; + struct device *twl6040_core_dev = pdev->dev.parent; + struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev); + int ret; + + if (pdata) + twl6040gpo_chip.base = pdata->gpio_base; + else + twl6040gpo_chip.base = -1; + + if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0) + twl6040gpo_chip.ngpio = 3; /* twl6040 have 3 GPO */ + else + twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */ + + twl6040gpo_chip.dev = &pdev->dev; +#ifdef CONFIG_OF_GPIO + twl6040gpo_chip.of_node = twl6040_core_dev->of_node; +#endif + + ret = gpiochip_add(&twl6040gpo_chip); + if (ret < 0) { + dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret); + twl6040gpo_chip.ngpio = 0; + } + + return ret; +} + +static int __devexit gpo_twl6040_remove(struct platform_device *pdev) +{ + return gpiochip_remove(&twl6040gpo_chip); +} + +/* Note: this hardware lives inside an I2C-based multi-function device. */ +MODULE_ALIAS("platform:twl6040-gpo"); + +static struct platform_driver gpo_twl6040_driver = { + .driver = { + .name = "twl6040-gpo", + .owner = THIS_MODULE, + }, + .probe = gpo_twl6040_probe, + .remove = gpo_twl6040_remove, +}; + +module_platform_driver(gpo_twl6040_driver); + +MODULE_AUTHOR("Texas Instruments, Inc."); +MODULE_DESCRIPTION("GPO interface for TWL6040"); +MODULE_LICENSE("GPL");