From patchwork Fri Apr 11 09:38:08 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Carlo Caione X-Patchwork-Id: 3966961 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A0B1C9F374 for ; Fri, 11 Apr 2014 09:37:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 957F5207FB for ; Fri, 11 Apr 2014 09:37:14 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 617B4207FA for ; Fri, 11 Apr 2014 09:37:13 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WYXtT-0000WC-Tc; Fri, 11 Apr 2014 09:37:08 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WYXtR-0008Qe-IK; Fri, 11 Apr 2014 09:37:05 +0000 Received: from bombadil.infradead.org ([2001:1868:205::9]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WYXtF-0008PS-F6 for linux-arm-kernel@merlin.infradead.org; Fri, 11 Apr 2014 09:36:56 +0000 Received: from mail-ee0-f42.google.com ([74.125.83.42]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WYXtD-0001CZ-Ga for linux-arm-kernel@lists.infradead.org; Fri, 11 Apr 2014 09:36:52 +0000 Received: by mail-ee0-f42.google.com with SMTP id d17so3923120eek.29 for ; Fri, 11 Apr 2014 02:36:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=0tXYE7OawHdhhYUX+ORqsuglioGTd0lPUv+mooQE45I=; b=D2Z9MeNetdFatyy2o46w4/CjMI5/c4ZypHFXQiywL8Z48qPmJHXTZkWY9sYg2ftLJ2 1heFYdrc5QzBpalNMLiGjtpc7sVHTWLB1sU5uxFQUYWPmX3ZOTQLVLSkkPoLmy3zwQQQ DA1y5uiBqHnLdmkAF5SD81lhbEe+76hdAq8xO8QAfXj6VuTl3nUGBzgL01UmSMMU2D14 Zns+ZllQOMj5CGEMry6EgG0aQrnm4nhS2+6NY9Wugq7YRMuWUbY5jp5MvLwq87mru+lA CU2e29V3kUxWOCiO7YIUxMxH9y3zbsb9aOaYScU+Rwx8qxHMON8x+IGO6OII3NSdUuUB 04cg== X-Received: by 10.14.214.198 with SMTP id c46mr27845482eep.29.1397208989205; Fri, 11 Apr 2014 02:36:29 -0700 (PDT) Received: from localhost-002.homenet.telecomitalia.it (host43-8-static.10-188-b.business.telecomitalia.it. [188.10.8.43]) by mx.google.com with ESMTPSA id l42sm16344939eew.19.2014.04.11.02.36.26 for (version=TLSv1.2 cipher=AES128-GCM-SHA256 bits=128/128); Fri, 11 Apr 2014 02:36:28 -0700 (PDT) From: Carlo Caione To: linux-arm-kernel@lists.infradead.org, linux-sunxi@googlegroups.com, maxime.ripard@free-electrons.com, hdegoede@redhat.com, emilio@elopez.com.ar, wens@csie.org, sameo@linux.intel.com, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-doc@vger.kernel.org, lgirdwood@gmail.com, broonie@kernel.org, lee.jones@linaro.org, boris.brezillon@free-electrons.com Subject: [PATCH v4 4/9] input: misc: Add driver for AXP20x Power Enable Key Date: Fri, 11 Apr 2014 11:38:08 +0200 Message-Id: <1397209093-10077-5-git-send-email-carlo@caione.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1397209093-10077-1-git-send-email-carlo@caione.org> References: <1397209093-10077-1-git-send-email-carlo@caione.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140411_023651_852988_3861DB16 X-CRM114-Status: GOOD ( 22.03 ) X-Spam-Score: -0.7 (/) Cc: Carlo Caione X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch add support for the Power Enable Key found on MFD AXP202 and AXP209. Besides the basic support for the button, the driver adds two entries in sysfs to configure the time delay for power on/off. Signed-off-by: Carlo Caione --- drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/axp20x-pek.c | 261 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 273 insertions(+) create mode 100644 drivers/input/misc/axp20x-pek.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 7904ab0..87244fb 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -393,6 +393,17 @@ config INPUT_RETU_PWRBUTTON To compile this driver as a module, choose M here. The module will be called retu-pwrbutton. +config INPUT_AXP20X_PEK + tristate "X-Powers AXP20X power button driver" + depends on MFD_AXP20X + help + Say Y here if you want to enable power key reporting via the + AXP20X PMIC. + + To compile this driver as a module, choose M here. The module will + be called axp20x-pek. + + config INPUT_TWL4030_PWRBUTTON tristate "TWL4030 Power button Driver" depends on TWL4030_CORE diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index cda71fc..624abf5 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -50,6 +50,7 @@ obj-$(CONFIG_INPUT_POWERMATE) += powermate.o obj-$(CONFIG_INPUT_PWM_BEEPER) += pwm-beeper.o obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o +obj-$(CONFIG_INPUT_AXP20X_PEK) += axp20x-pek.o obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c new file mode 100644 index 0000000..a9112bd --- /dev/null +++ b/drivers/input/misc/axp20x-pek.c @@ -0,0 +1,261 @@ +/* + * axp20x power button driver. + * + * Copyright (C) 2013 Carlo Caione + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + * + * 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 AXP20X_PEK_STARTUP_MASK (0xc0) +#define AXP20X_PEK_SHUTDOWN_MASK (0x03) + +struct axp20x_pek { + struct axp20x_dev *axp20x; + struct input_dev *input; + int irq_dbr; + int irq_dbf; +}; + +struct axp20x_time { + unsigned int time; + unsigned int idx; +}; + +static const struct axp20x_time startup_time[] = { + { .time = 128, .idx = 0 }, + { .time = 1000, .idx = 2 }, + { .time = 3000, .idx = 1 }, + { .time = 2000, .idx = 3 }, +}; + +static const struct axp20x_time shutdown_time[] = { + { .time = 4000, .idx = 0 }, + { .time = 6000, .idx = 1 }, + { .time = 8000, .idx = 2 }, + { .time = 10000, .idx = 3 }, +}; + +struct axp20x_pek_ext_attr { + const struct axp20x_time *p_time; + unsigned int mask; +}; + +static struct axp20x_pek_ext_attr axp20x_pek_startup_ext_attr = { + .p_time = startup_time, + .mask = AXP20X_PEK_STARTUP_MASK, +}; + +static struct axp20x_pek_ext_attr axp20x_pek_shutdown_ext_attr = { + .p_time = shutdown_time, + .mask = AXP20X_PEK_SHUTDOWN_MASK, +}; + +static struct axp20x_pek_ext_attr *get_axp_ext_attr(struct device_attribute *attr) +{ + return container_of(attr, struct dev_ext_attribute, attr)->var; +} + +static ssize_t axp20x_show_ext_attr(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev); + struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr); + unsigned int val; + int ret, i; + + ret = regmap_read(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY, &val); + if (ret != 0) + return ret; + + val &= axp20x_ea->mask; + val >>= ffs(axp20x_ea->mask) - 1; + + for (i = 0; i < 4; i++) + if (val == axp20x_ea->p_time[i].idx) + val = axp20x_ea->p_time[i].time; + + return sprintf(buf, "%ums\n", val); +} + +static ssize_t axp20x_store_ext_attr(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev); + struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr); + char val_str[20]; + size_t len; + int ret, i; + unsigned int val, idx = 0; + unsigned int best_err = UINT_MAX; + + val_str[sizeof(val_str) - 1] = '\0'; + strncpy(val_str, buf, sizeof(val_str) - 1); + len = strlen(val_str); + + if (len && val_str[len - 1] == '\n') + val_str[len - 1] = '\0'; + + ret = kstrtouint(val_str, 10, &val); + if (ret) + return ret; + + for (i = 3; i >= 0; i--) { + unsigned int err; + + err = abs(axp20x_ea->p_time[i].time - val); + if (err < best_err) { + best_err = err; + idx = axp20x_ea->p_time[i].idx; + } + + if (!err) + break; + } + + idx <<= ffs(axp20x_ea->mask) - 1; + ret = regmap_update_bits(axp20x_pek->axp20x->regmap, + AXP20X_PEK_KEY, + axp20x_ea->mask, idx); + if (ret != 0) + return -EINVAL; + return count; +} + +static struct dev_ext_attribute axp20x_dev_attr_startup = { + .attr = __ATTR(startup, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr), + .var = &axp20x_pek_startup_ext_attr +}; + +static struct dev_ext_attribute axp20x_dev_attr_shutdown = { + .attr = __ATTR(shutdown, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr), + .var = &axp20x_pek_shutdown_ext_attr +}; + +static irqreturn_t axp20x_pek_irq(int irq, void *pwr) +{ + struct input_dev *idev = pwr; + struct axp20x_pek *axp20x_pek = input_get_drvdata(idev); + + if (irq == axp20x_pek->irq_dbr) + input_report_key(idev, KEY_POWER, true); + else if (irq == axp20x_pek->irq_dbf) + input_report_key(idev, KEY_POWER, false); + + input_sync(idev); + + return IRQ_HANDLED; +} + +static int axp20x_pek_probe(struct platform_device *pdev) +{ + struct axp20x_pek *axp20x_pek; + struct axp20x_dev *axp20x; + struct input_dev *idev; + int error; + + axp20x_pek = devm_kzalloc(&pdev->dev, sizeof(struct axp20x_pek), + GFP_KERNEL); + if (!axp20x_pek) + return -ENOMEM; + + axp20x_pek->axp20x = dev_get_drvdata(pdev->dev.parent); + axp20x = axp20x_pek->axp20x; + + axp20x_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR"); + if (axp20x_pek->irq_dbr < 0) { + dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n", + axp20x_pek->irq_dbr); + return axp20x_pek->irq_dbr; + } + axp20x_pek->irq_dbr = regmap_irq_get_virq(axp20x->regmap_irqc, + axp20x_pek->irq_dbr); + + axp20x_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF"); + if (axp20x_pek->irq_dbf < 0) { + dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n", + axp20x_pek->irq_dbf); + return axp20x_pek->irq_dbf; + } + axp20x_pek->irq_dbf = regmap_irq_get_virq(axp20x->regmap_irqc, + axp20x_pek->irq_dbf); + + axp20x_pek->input = devm_input_allocate_device(&pdev->dev); + if (!axp20x_pek->input) + return -ENOMEM; + + idev = axp20x_pek->input; + + idev->name = "axp20x-pek"; + idev->phys = "m1kbd/input2"; + idev->dev.parent = &pdev->dev; + + input_set_capability(idev, EV_KEY, KEY_POWER); + + input_set_drvdata(idev, axp20x_pek); + + error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbr, + axp20x_pek_irq, 0, + "axp20x-pek-dbr", idev); + if (error < 0) { + dev_err(axp20x->dev, "Failed to request dbr IRQ#%d: %d\n", + axp20x_pek->irq_dbr, error); + + return error; + } + + error = devm_request_any_context_irq(&pdev->dev, axp20x_pek->irq_dbf, + axp20x_pek_irq, 0, + "axp20x-pek-dbf", idev); + if (error < 0) { + dev_err(axp20x->dev, "Failed to request dbf IRQ#%d: %d\n", + axp20x_pek->irq_dbf, error); + return error; + } + + + if (device_create_file(&pdev->dev, &axp20x_dev_attr_startup.attr) || + device_create_file(&pdev->dev, &axp20x_dev_attr_shutdown.attr)) + return -ENODEV; + + error = input_register_device(idev); + if (error) { + dev_err(axp20x->dev, "Can't register input device: %d\n", error); + return error; + } + + platform_set_drvdata(pdev, axp20x_pek); + + return 0; +} + +static struct platform_driver axp20x_pek_driver = { + .probe = axp20x_pek_probe, + .driver = { + .name = "axp20x-pek", + .owner = THIS_MODULE, + }, +}; +module_platform_driver(axp20x_pek_driver); + +MODULE_DESCRIPTION("axp20x Power Button"); +MODULE_AUTHOR("Carlo Caione "); +MODULE_LICENSE("GPL");