From patchwork Sat Mar 1 16:45:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Carlo Caione X-Patchwork-Id: 3747681 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 D91179F35F for ; Sat, 1 Mar 2014 16:49:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B7C9A20374 for ; Sat, 1 Mar 2014 16:49:15 +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 425E020364 for ; Sat, 1 Mar 2014 16:49:14 +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 1WJn46-0005dD-8w; Sat, 01 Mar 2014 16:47:07 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WJn3e-0003OX-DY; Sat, 01 Mar 2014 16:46:38 +0000 Received: from mail-ee0-f54.google.com ([74.125.83.54]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WJn38-0003JR-QT for linux-arm-kernel@lists.infradead.org; Sat, 01 Mar 2014 16:46:10 +0000 Received: by mail-ee0-f54.google.com with SMTP id c41so3023265eek.13 for ; Sat, 01 Mar 2014 08:45:44 -0800 (PST) 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=bCD9lPMbD9YqxdXsSsiVDR4/LDItv1apLs4GoBli7dI=; b=jyrfYp9oGDTXClo1JUibUqRzkgnrtyObrg0gdVbN6i8/rVi3fDKWn8ZURp5/XTKWN/ tmwjpNIfuK+ErT0j5zhyxDjT8D4Huwnuq4IMnKddUBvCkSTJR86Uo4WVl5z5ILFOd1R2 YdkDTXh1lciN4yj5HxA0FJDPcLJlM/syThH30NCG2F5GWbaK0WfkvpXbPpaLWFFi70aO YCVRgp4niarsF5N2oGpnqEs1+37LjJI801DkDpwf0QtETM/jQej223wAC0236XZNtHFj DYIKeT2ZFjayIEUUGgEFPWKzngtfVCOI+aUoyUPAd0a1Uyv1aN6vxFrdq4z1+2cFzeaw Eb/A== X-Received: by 10.15.75.66 with SMTP id k42mr29383883eey.2.1393692344686; Sat, 01 Mar 2014 08:45:44 -0800 (PST) Received: from localhost.fastwebnet.it (2-238-57-164.ip242.fastwebnet.it. [2.238.57.164]) by mx.google.com with ESMTPSA id a2sm25441488eem.18.2014.03.01.08.45.42 for (version=TLSv1.2 cipher=AES128-GCM-SHA256 bits=128/128); Sat, 01 Mar 2014 08:45:43 -0800 (PST) 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, lee.jones@linaro.org, devicetree@vger.kernel.org, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-doc@vger.kernel.org, lgirdwood@gmail.com, broonie@kernel.org Subject: [PATCH 4/7] input: misc: Add driver for AXP20x Power Enable Key Date: Sat, 1 Mar 2014 17:45:49 +0100 Message-Id: <1393692352-10839-5-git-send-email-carlo@caione.org> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1393692352-10839-1-git-send-email-carlo@caione.org> References: <1393692352-10839-1-git-send-email-carlo@caione.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140301_114607_133602_93FF55A7 X-CRM114-Status: GOOD ( 21.56 ) X-Spam-Score: 0.5 (/) 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=-1.1 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=no 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 --- arch/arm/configs/sunxi_defconfig | 2 + drivers/input/misc/Kconfig | 11 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/axp20x-pek.c | 265 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 279 insertions(+) create mode 100644 drivers/input/misc/axp20x-pek.c diff --git a/arch/arm/configs/sunxi_defconfig b/arch/arm/configs/sunxi_defconfig index f8aa7e6..d59c826 100644 --- a/arch/arm/configs/sunxi_defconfig +++ b/arch/arm/configs/sunxi_defconfig @@ -39,6 +39,8 @@ CONFIG_SUN4I_EMAC=y # CONFIG_NET_VENDOR_STMICRO is not set # CONFIG_NET_VENDOR_WIZNET is not set # CONFIG_WLAN is not set +CONFIG_INPUT_MISC=y +CONFIG_INPUT_AXP20X_PEK=y CONFIG_SERIAL_8250=y CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_8250_NR_UARTS=8 diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 5f4967d..c9438ac 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -384,6 +384,17 @@ 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 0ebfb6d..41d5403 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -49,6 +49,7 @@ 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..799275d --- /dev/null +++ b/drivers/input/misc/axp20x-pek.c @@ -0,0 +1,265 @@ +/* + * 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) + +static const char const *startup_time[] = { "128mS", "3S" , "1S", "2S" }; +static const char const *shutdown_time[] = { "4S", "6S" , "8S", "10S" }; + +struct axp20x_pek { + struct axp20x_dev *axp20x; + struct input_dev *input; + int irq_dbr; + int irq_dbf; +}; + +struct axp20x_pek_ext_attr { + const char const **str; + unsigned int mask; +}; + +static struct axp20x_pek_ext_attr axp20x_pek_startup_ext_attr = { + .str = startup_time, + .mask = AXP20X_PEK_STARTUP_MASK, +}; + +static struct axp20x_pek_ext_attr axp20x_pek_shutdown_ext_attr = { + .str = 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; +} + +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; + int cnt = 0; + + 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 == i) + cnt += sprintf(buf + cnt, "[%s] ", axp20x_ea->str[i]); + else + cnt += sprintf(buf + cnt, "%s ", axp20x_ea->str[i]); + } + + cnt += sprintf(buf + cnt, "\n"); + + return cnt; +} + +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]; + int ret, i; + size_t len; + + 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'; + + for (i = 0; i < 4; i++) { + if (!strcmp(val_str, axp20x_ea->str[i])) { + ret = regmap_update_bits(axp20x_pek->axp20x->regmap, + AXP20X_PEK_KEY, + axp20x_ea->mask, i); + if (ret != 0) + return -EINVAL; + return count; + } + } + + return -EINVAL; +} + +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(shutdown, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr), + &axp20x_pek_shutdown_ext_attr +}; + +static struct attribute *dev_attrs[] = { + &axp20x_dev_attr_startup.attr.attr, + &axp20x_dev_attr_shutdown.attr.attr, + NULL, +}; + +static struct attribute_group dev_attr_group = { + .attrs = dev_attrs, +}; + +static const struct attribute_group *dev_attr_groups[] = { + &dev_attr_group, + NULL, +}; + +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_threaded_irq(&pdev->dev, axp20x_pek->irq_dbr, + NULL, axp20x_pek_irq, 0, + "axp20x-pek-dbr", idev); + if (error) { + dev_err(axp20x->dev, "Failed to request dbr IRQ#%d: %d\n", + axp20x_pek->irq_dbr, error); + + return error; + } + + error = devm_request_threaded_irq(&pdev->dev, axp20x_pek->irq_dbf, + NULL, axp20x_pek_irq, 0, + "axp20x-pek-dbf", idev); + if (error) { + dev_err(axp20x->dev, "Failed to request dbf IRQ#%d: %d\n", + axp20x_pek->irq_dbf, error); + return error; + } + + idev->dev.groups = dev_attr_groups; + 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 int axp20x_pek_remove(struct platform_device *pdev) +{ + struct axp20x_pek *axp20x_pek = platform_get_drvdata(pdev); + + input_unregister_device(axp20x_pek->input); + + return 0; +} + +static const struct of_device_id axp20x_pek_match[] = { + { .compatible = "x-powers,axp20x-pek", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, axp20x_pek_match); + +static struct platform_driver axp20x_pek_driver = { + .probe = axp20x_pek_probe, + .remove = axp20x_pek_remove, + .driver = { + .name = "axp20x-pek", + .owner = THIS_MODULE, + .of_match_table = axp20x_pek_match, + }, +}; +module_platform_driver(axp20x_pek_driver); + +MODULE_DESCRIPTION("axp20x Power Button"); +MODULE_AUTHOR("Carlo Caione "); +MODULE_LICENSE("GPL");