lp8727_charger: Add supported i2c functionality check routine

lp8727 i2c r/w functions are based on SMBUS I2C BLOCK. So the driver needs to
check whether i2c bus supports this functionality or not.

Signed-off-by: Woogyom Kim <milo.kim@ti.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c
index 2a649e0..a7e5cc2 100644 (file)
--- a/drivers/power/lp8727_charger.c
+++ b/drivers/power/lp8727_charger.c
@@ -425,6 +425,9 @@ static int lp8727_probe(struct i2c_client *cl, const struct i2c_device_id *id)
        struct lp8727_chg *pchg;
        int ret;
 
+       if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
+               return -EIO;
+
        pchg = kzalloc(sizeof(*pchg), GFP_KERNEL);
        if (!pchg)
                return -ENOMEM;