From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wg0-x229.google.com ([2a00:1450:400c:c00::229]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UFCfa-0007VK-Pe for barebox@lists.infradead.org; Tue, 12 Mar 2013 00:02:20 +0000 Received: by mail-wg0-f41.google.com with SMTP id ds1so2701859wgb.0 for ; Mon, 11 Mar 2013 17:02:16 -0700 (PDT) From: Vicente Bergas Date: Tue, 12 Mar 2013 01:01:23 +0100 Message-Id: <1363046484-24946-1-git-send-email-vicencb@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 2/4] twl6030: add power button as an input key To: s.hauer@pengutronix.de, barebox@lists.infradead.org Cc: Vicente Bergas Done as suggested. Thanks for the suggestion. Signed-off-by: Vicente Bergas --- drivers/input/Kconfig | 7 +++ drivers/input/Makefile | 1 + drivers/input/twl6030_pwrbtn.c | 112 +++++++++++++++++++++++++++++++++++++++++ include/twl6030_pwrbtn.h | 9 ++++ 4 files changed, 129 insertions(+) create mode 100644 drivers/input/twl6030_pwrbtn.c create mode 100644 include/twl6030_pwrbtn.h diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig index a6f1f47..3d9016b 100644 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -38,4 +38,11 @@ config KEYBOARD_QT1070 Say Y here if you want to use Atmel AT42QT1070 QTouch Sensor chip as input device. +config KEYBOARD_TWL6030 + tristate "TWL6030 power button" + depends on MFD_TWL6030 + select POLLER + help + Say Y here if you want to use TWL6030 power button as a key. + endmenu diff --git a/drivers/input/Makefile b/drivers/input/Makefile index d042980..b9bcc82 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o +obj-$(CONFIG_KEYBOARD_TWL6030) += twl6030_pwrbtn.o obj-$(CONFIG_KEYBOARD_IMX_KEYPAD) += imx_keypad.o obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o diff --git a/drivers/input/twl6030_pwrbtn.c b/drivers/input/twl6030_pwrbtn.c new file mode 100644 index 0000000..ec6cf7f --- /dev/null +++ b/drivers/input/twl6030_pwrbtn.c @@ -0,0 +1,112 @@ +/* + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct twl6030_pwrbtn_internal_data { + int code; + u8 previous_state; + struct twl6030 *twl6030; + struct kfifo *recv_fifo; + struct console_device cdev; + struct poller_struct poller; +}; + +#define PWR_PWRON_IRQ (1 << 0) + +static void ic2_key_poller(struct poller_struct *poller) +{ + struct twl6030_pwrbtn_internal_data *idata = container_of( + poller, struct twl6030_pwrbtn_internal_data, poller); + u8 val; + + if (twl6030_reg_read(idata->twl6030, TWL6030_PMCM_HW, &val)) { + dev_err(idata->cdev.dev, "reading i2c\n"); + return; + } + val = !(val & PWR_PWRON_IRQ); + if (val != idata->previous_state && val) { + kfifo_put(idata->recv_fifo, (u_char *)&idata->code, + sizeof(int)); + dev_dbg(idata->cdev.dev, "pressed power button as %d\n", + idata->code); + } + idata->previous_state = val; +} + +static int twl6030_pwrbtn_tstc(struct console_device *cdev) +{ + struct twl6030_pwrbtn_internal_data *idata = container_of( + cdev, struct twl6030_pwrbtn_internal_data, cdev); + + return kfifo_len(idata->recv_fifo) ? 1 : 0; +} + +static int twl6030_pwrbtn_getc(struct console_device *cdev) +{ + int code = 0; + struct twl6030_pwrbtn_internal_data *idata = container_of( + cdev, struct twl6030_pwrbtn_internal_data, cdev); + + kfifo_get(idata->recv_fifo, (u_char *)&code, sizeof(int)); + return code; +} + +static int __init twl6030_pwrbtn_probe(struct device_d *dev) +{ + struct twl6030_pwrbtn_internal_data *idata; + struct twl6030_pwrbtn_platform_data *pdata; + + pdata = dev->platform_data; + if (!pdata) { + dev_err(dev, "missing platform_data\n"); + return -ENODEV; + } + + idata = xzalloc(sizeof(struct twl6030_pwrbtn_internal_data)); + if (!idata) { + dev_err(dev, "out of memory allocating idata\n"); + return -ENOMEM; + } + + idata->recv_fifo = kfifo_alloc(sizeof(int)); + if (!idata->recv_fifo) { + dev_err(dev, "out of memory allocating kfifo\n"); + free(idata); + return -ENOMEM; + } + + idata->code = pdata->code; + idata->twl6030 = twl6030_get(); + idata->poller.func = ic2_key_poller; + + dev->type_data = &idata->cdev; + idata->cdev.dev = dev; + idata->cdev.f_caps = CONSOLE_STDIN; + idata->cdev.tstc = twl6030_pwrbtn_tstc; + idata->cdev.getc = twl6030_pwrbtn_getc; + console_register(&idata->cdev); + + return poller_register(&idata->poller); +} + +static struct driver_d twl6030_pwrbtn_driver = { + .name = "twl6030_pwrbtn", + .probe = twl6030_pwrbtn_probe, +}; +device_platform_driver(twl6030_pwrbtn_driver); diff --git a/include/twl6030_pwrbtn.h b/include/twl6030_pwrbtn.h new file mode 100644 index 0000000..c4e13d1 --- /dev/null +++ b/include/twl6030_pwrbtn.h @@ -0,0 +1,9 @@ +#ifndef _TWL6030_PWRBTN_H +#define _TWL6030_PWRBTN_H + +struct twl6030_pwrbtn_platform_data { + /* key code */ + int code; +}; + +#endif -- 1.8.1.5 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox