diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-05-19 21:04:40 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-08-24 14:05:14 +0200 |
| commit | b4e2f6ac1281cd3e066919cc762eef4924e9fcc5 (patch) | |
| tree | 206dacd75e61cebc7c5e0e91b4de73b4e656ce84 /drivers/i2c | |
| parent | c4019b7040eaf88f440ce5212e055a4f19b1b541 (diff) | |
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 4ffe06451081..7b18f31bf6c6 100644 --- 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; |