add hym8563 alarm can work when system suspend

diff --git a/arch/arm/mach-rk2818/board-infoit50.c b/arch/arm/mach-rk2818/board-infoit50.c
index 3fee09d264ada2ef77980f06bc25d3818731030f..f7def7840bdbd1668934c2eb15fc1bd68ae5a1c8 100755 (executable)
--- a/arch/arm/mach-rk2818/board-infoit50.c
+++ b/arch/arm/mach-rk2818/board-infoit50.c
@@ -553,6 +553,7 @@ static struct i2c_board_info __initdata board_i2c1_devices[] = {
                .type                   = "rtc_hym8563",
                .addr           = 0x51,
                .flags                  = 0,
+               .irq            = RK2818_PIN_PA4,
        },
 #endif
 #if defined (CONFIG_FM_QN8006)

diff --git a/drivers/rtc/rtc-HYM8563.c b/drivers/rtc/rtc-HYM8563.c
index ba665d921b9032a3c8302aebd230cda528bf0f17..ab2500de8b318db6f0481159a8e39c6aa50be50c 100644 (file)
--- a/drivers/rtc/rtc-HYM8563.c
+++ b/drivers/rtc/rtc-HYM8563.c
@@ -26,6 +26,13 @@
 #define DBG(x...)
 #endif
 #define RTC_SPEED      100 * 1000
+
+struct hym8563 {
+       int irq_num;
+       struct i2c_client *client;
+       struct work_struct work;        
+};
+
 static int hym8563_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[], unsigned len)
 {
        int ret; 
@@ -181,6 +188,7 @@ static int hym8563_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *tm)
 {
        struct i2c_client *client = to_i2c_client(dev);
        u8 regs[4] = { 0, };
+       
        hym8563_i2c_read_regs(client, RTC_A_MIN, regs, 4);
        regs[0] = 0x0;
        hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
@@ -192,6 +200,7 @@ static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
        struct i2c_client *client = to_i2c_client(dev);
        u8 regs[4] = { 0, };
        u8 mon_day;
+       
        regs[0] = 0x0;
        hym8563_i2c_set_regs(client, RTC_CTL2, regs, 1);
        mon_day = rtc_month_days((tm->time.tm_mon), tm->time.tm_year + 1900);
@@ -280,6 +289,26 @@ static int hym8563_rtc_proc(struct device *dev, struct seq_file *seq)
 #define hym8563_rtc_proc NULL
 #endif
 
+static irqreturn_t hym8563_wakeup_irq(int irq, void *dev_id)
+{      
+       struct hym8563 *hym8563 = (struct hym8563 *)dev_id;
+       DBG("Enter::%s %d\n",__FUNCTION__,__LINE__);
+       disable_irq_nosync(irq);
+       schedule_work(&hym8563->work);
+       return IRQ_HANDLED;
+}
+static void hym8563_work_func(struct work_struct *work)
+{      
+       struct hym8563 *hym8563 = container_of(work, struct hym8563, work);
+       struct i2c_client *client = hym8563->client;
+       u8 data;
+       DBG("Enter::%s %d\n",__FUNCTION__,__LINE__);
+       hym8563_i2c_read_regs(client, RTC_CTL2, &data, 1);
+       data &= ~AF;
+       hym8563_i2c_set_regs(client, RTC_CTL2, &data, 1);
+       enable_irq(hym8563->irq_num);
+}
+
 static const struct rtc_class_ops hym8563_rtc_ops = {
        .read_time      = hym8563_rtc_read_time,
        .set_time       = hym8563_rtc_set_time,
@@ -292,6 +321,7 @@ static const struct rtc_class_ops hym8563_rtc_ops = {
 static int __devinit  hym8563_probe(struct i2c_client *client,const struct i2c_device_id *id)
 {
        int rc = 0;
+       struct hym8563 *hym8563;
        struct rtc_device *rtc = NULL;
        struct rtc_time tm_read, tm = {
        .tm_wday = 4,
@@ -305,6 +335,12 @@ static int __devinit  hym8563_probe(struct i2c_client *client,const struct i2c_d
        
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                return -ENODEV;
+               
+       hym8563 = kzalloc(sizeof(struct hym8563), GFP_KERNEL);
+       if (!hym8563) {
+               return -ENOMEM;
+       }
+               
        rtc = rtc_device_register(client->name, &client->dev,
                                  &hym8563_rtc_ops, THIS_MODULE);
        if (IS_ERR(rtc)) {
@@ -312,6 +348,7 @@ static int __devinit  hym8563_probe(struct i2c_client *client,const struct i2c_d
                rtc = NULL;
                goto exit;
        }
+       hym8563->client = client;
        hym8563_init_device(client);
        hym8563_read_datetime(client, &tm_read);        //read time from hym8563
        
@@ -319,6 +356,23 @@ static int __devinit  hym8563_probe(struct i2c_client *client,const struct i2c_d
        {
                hym8563_set_time(client, &tm);  //initialize the hym8563 
        }       
+       
+       if(gpio_request(client->irq, "rtc gpio"))
+       {
+               dev_err(&client->dev, "gpio request fail\n");
+               gpio_free(client->irq);
+               goto exit;
+       }
+       
+       hym8563->irq_num = gpio_to_irq(client->irq);
+       gpio_pull_updown(client->irq,GPIOPullUp);
+       if(request_irq(hym8563->irq_num, hym8563_wakeup_irq,IRQF_TRIGGER_FALLING,NULL,hym8563) <0)      
+       {
+               printk("unable to request rtc irq\n");
+               goto exit;
+       }       
+       enable_irq_wake(hym8563->irq_num);
+       INIT_WORK(&hym8563->work, hym8563_work_func);
        return 0;
 
 exit: