i2c: apply DT flags when probing

Check for slave and 10-bit flags when probing and mark the client when
found. Improve the address validity check, too

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 4ffe064..7b18f31 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -27,6 +27,7 @@
    I2C slave support (c) 2014 by Wolfram Sang <wsa@sang-engineering.com>
  */
 
+#include <dt-bindings/i2c/i2c.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
@@ -1288,7 +1289,8 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap,
        struct i2c_client *result;
        struct i2c_board_info info = {};
        struct dev_archdata dev_ad = {};
-       const __be32 *addr;
+       const __be32 *addr_be;
+       u32 addr;
        int len;
 
        dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name);
@@ -1299,20 +1301,31 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap,
                return ERR_PTR(-EINVAL);
        }
 
-       addr = of_get_property(node, "reg", &len);
-       if (!addr || (len < sizeof(*addr))) {
+       addr_be = of_get_property(node, "reg", &len);
+       if (!addr_be || (len < sizeof(*addr_be))) {
                dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
                        node->full_name);
                return ERR_PTR(-EINVAL);
        }
 
-       info.addr = be32_to_cpup(addr);
-       if (info.addr > (1 << 10) - 1) {
+       addr = be32_to_cpup(addr_be);
+       if (addr & I2C_TEN_BIT_ADDRESS) {
+               addr &= ~I2C_TEN_BIT_ADDRESS;
+               info.flags |= I2C_CLIENT_TEN;
+       }
+
+       if (addr & I2C_OWN_SLAVE_ADDRESS) {
+               addr &= ~I2C_OWN_SLAVE_ADDRESS;
+               info.flags |= I2C_CLIENT_SLAVE;
+       }
+
+       if (i2c_check_addr_validity(addr, info.flags)) {
                dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
                        info.addr, node->full_name);
                return ERR_PTR(-EINVAL);
        }
 
+       info.addr = addr;
        info.of_node = of_node_get(node);
        info.archdata = &dev_ad;