rk3288:pmic:ricoh619:slove read id error for first time

diff --git a/drivers/mfd/ricoh619.c b/drivers/mfd/ricoh619.c
index 94a6f52d5ddcd70ed9628651c476d5de79f6e8bc..f03ada60cd5e19c196d538b6581266273bce04a2 100755 (executable)
--- a/drivers/mfd/ricoh619.c
+++ b/drivers/mfd/ricoh619.c
@@ -811,6 +811,7 @@ static int ricoh619_i2c_probe(struct i2c_client *client,
        struct ricoh619_platform_data *pdata;
        int ret;
        uint8_t control;
+       int i=0;
         printk("%s,line=%d\n", __func__,__LINE__);
 
        ricoh619 = devm_kzalloc(&client->dev,sizeof(struct ricoh619), GFP_KERNEL);
@@ -824,8 +825,22 @@ static int ricoh619_i2c_probe(struct i2c_client *client,
 
        ret = ricoh619_read(ricoh619->dev, 0x36, &control);
        if ((ret <0) || (control < 0) || (control == 0xff) || (control == 0) ){
-               printk(KERN_INFO "The device is not ricoh619 %08x %d\n",control,ret);
-               goto err;
+               if (ret <0){
+                       printk(KERN_INFO "The device is not ricoh619 %08x %d\n",control,ret);
+                       goto err;
+               }
+               else{
+                       do{
+                               ret = ricoh619_read(ricoh619->dev, 0x36, &control);
+                               i += 1;
+                               printk(KERN_INFO "##################:read ricoh619 0x36 error retry %08x %d\n",control,ret);
+                       }while( ((control == 0xff) || (control == 0) ) && (i < 10));
+                       if ((control == 0xff) || (control == 0) ){
+                               ret = -ENXIO;   
+                               printk(KERN_INFO "##################The device is not ricoh619 %08x %d\n",control,ret);
+                               goto err;
+                       }
+               }
        }
 
        ret = ricoh619_pre_init(ricoh619);