From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kim, HeungJun" Subject: [PATCH 3/3] input: keyboard: MCS5080: support led blink when it's touched. Date: Mon, 15 Nov 2010 13:33:30 +0900 Message-ID: <4CE0B81A.9030501@samsung.com> Reply-To: riverful.kim@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset=EUC-KR Content-Transfer-Encoding: 7BIT Return-path: Received: from mailout1.samsung.com ([203.254.224.24]:59485 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757500Ab0KOEdc (ORCPT ); Sun, 14 Nov 2010 23:33:32 -0500 Received: from epmmp2 (mailout1.samsung.com [203.254.224.24]) by mailout1.samsung.com (Oracle Communications Messaging Exchange Server 7u4-19.01 64bit (built Sep 7 2010)) with ESMTP id <0LBW00CNWSNU41D0@mailout1.samsung.com> for linux-input@vger.kernel.org; Mon, 15 Nov 2010 13:33:30 +0900 (KST) Received: from TNRNDGASPAPP1.tn.corp.samsungelectronics.net ([165.213.149.150]) by mmp2.samsung.com (iPlanet Messaging Server 5.2 Patch 2 (built Jul 14 2004)) with ESMTPA id <0LBW00FAESNV0V@mmp2.samsung.com> for linux-input@vger.kernel.org; Mon, 15 Nov 2010 13:33:31 +0900 (KST) Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: linux-input@vger.kernel.org, dmitry.torokhov@gmail.com, kyungmin.park@samsung.com This patch supports touchkey led blinking. The touchkey led lights on as soon as it touched. After LED_TIME, the led lights-off. Signed-off-by: Heungjun Kim Signed-off-by: Kyungmin Park --- drivers/input/keyboard/mcs_touchkey.c | 39 +++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-) diff --git a/drivers/input/keyboard/mcs_touchkey.c b/drivers/input/keyboard/mcs_touchkey.c index 931b28c..e3fd31f 100644 --- a/drivers/input/keyboard/mcs_touchkey.c +++ b/drivers/input/keyboard/mcs_touchkey.c @@ -19,6 +19,7 @@ #include #include #include +#include /* MCS5000 Touchkey */ #define MCS5000_TOUCHKEY_STATUS 0x04 @@ -32,6 +33,8 @@ #define MCS5080_TOUCHKEY_FW 0x01 #define MCS5080_TOUCHKEY_BASE_VAL 0x1 +#define LED_TIME 500 + enum mcs_touchkey_type { MCS5000_TOUCHKEY, MCS5080_TOUCHKEY, @@ -46,6 +49,8 @@ struct mcs_touchkey_chip { struct mcs_touchkey_data { void (*poweron)(int); + struct delayed_work work; + int suspended; struct i2c_client *client; struct input_dev *input_dev; @@ -55,6 +60,30 @@ struct mcs_touchkey_data { unsigned short keycodes[]; }; +static void mcs_touchkey_led(struct mcs_touchkey_data *data, int on) +{ + unsigned char buf; + + if (data->suspended) + return; + + if (on) + buf = 0x1; + else + buf = 0x2; + i2c_master_send(data->client, &buf, 1); +} + +static void mcs_touchkey_work(struct work_struct *work) +{ + struct delayed_work *dw = to_delayed_work(work); + struct mcs_touchkey_data *data; + + data = container_of(dw, struct mcs_touchkey_data, work); + + mcs_touchkey_led(data, 0); +} + static irqreturn_t mcs_touchkey_interrupt(int irq, void *dev_id) { struct mcs_touchkey_data *data = dev_id; @@ -89,6 +118,14 @@ static irqreturn_t mcs_touchkey_interrupt(int irq, void *dev_id) input_report_key(input, data->key_code, pressed); input_sync(input); + if (pressed) { + cancel_work_sync(&data->work.work); + mcs_touchkey_led(data, 1); + } else { + if (!delayed_work_pending(&data->work)) + schedule_delayed_work(&data->work, msecs_to_jiffies(LED_TIME)); + } + dev_dbg(&client->dev, "key %d %d %s\n", data->key_val, data->key_code, pressed ? "pressed" : "released"); @@ -173,6 +210,8 @@ static int __devinit mcs_touchkey_probe(struct i2c_client *client, if (pdata->poweron) data->poweron = pdata->poweron; + INIT_DELAYED_WORK(&data->work, mcs_touchkey_work); + error = request_threaded_irq(client->irq, NULL, mcs_touchkey_interrupt, IRQF_TRIGGER_FALLING, client->dev.driver->name, data); if (error) { -- 1.7.0.4