diff options
author | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2014-10-28 22:36:02 +0200 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2015-02-21 12:12:58 +0900 |
commit | 4edb763a4caa7df6f60d132674c276bcf9135d72 (patch) | |
tree | bc4ba7875ba6bfbbea3ef2c48bbf2fc75eb669cf | |
parent | 7f4270494946e86c1bdbd9d17161dc785c17c361 (diff) |
i2c/of: Factor out Devicetree registration code
Dynamically inserting i2c client device nodes requires the use
of a single device registration method. Factor out the loop body of
of_i2c_register_devices() so that it can be called for individual
device_nodes instead of for all the children of a node.
Note: The diff of this commit looks far more complicated than it
actually is due the indentation being changed for a large block of code.
When viewed using the diff -w flag to ignore whitespace changes it can
be seen that the change is actually quite simple.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[grant.likely: Made new function static and removed changes to header]
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Wolfram Sang <wsa@the-dreams.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-i2c@vger.kernel.org
(cherry picked from commit a430a3455f2c48995e06b359a82a1109a419e9ef)
Signed-off-by: Mark Brown <broonie@kernel.org>
Conflicts:
drivers/i2c/i2c-core.c
-rw-r--r-- | drivers/i2c/i2c-core.c | 97 |
1 files changed, 52 insertions, 45 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index c00292aa5221..7620b0564baf 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -49,6 +49,7 @@ #include <linux/pm_runtime.h> #include <linux/acpi.h> #include <asm/uaccess.h> +#include <linux/err.h> #include "i2c-core.h" @@ -963,63 +964,69 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter) /* OF support code */ #if IS_ENABLED(CONFIG_OF) -static void internal_of_i2c_register_devices(struct i2c_adapter *adap) +static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, + struct device_node *node) { - void *result; - struct device_node *node; + struct i2c_client *result; + struct i2c_board_info info = {}; + struct dev_archdata dev_ad = {}; + const __be32 *addr; + int len; - /* Only register child devices if the adapter has a node pointer set */ - if (!adap->dev.of_node) - return; + dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); - dev_dbg(&adap->dev, "of_i2c: walking child nodes\n"); + if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { + dev_err(&adap->dev, "of_i2c: modalias failure on %s\n", + node->full_name); + return ERR_PTR(-EINVAL); + } - for_each_available_child_of_node(adap->dev.of_node, node) { - struct i2c_board_info info = {}; - struct dev_archdata dev_ad = {}; - const __be32 *addr; - int len; + addr = of_get_property(node, "reg", &len); + if (!addr || (len < sizeof(int))) { + dev_err(&adap->dev, "of_i2c: invalid reg on %s\n", + node->full_name); + return ERR_PTR(-EINVAL); + } - dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); + info.addr = be32_to_cpup(addr); + if (info.addr > (1 << 10) - 1) { + dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n", + info.addr, node->full_name); + return ERR_PTR(-EINVAL); + } - if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { - dev_err(&adap->dev, "of_i2c: modalias failure on %s\n", - node->full_name); - continue; - } + info.irq = irq_of_parse_and_map(node, 0); + info.of_node = of_node_get(node); + info.archdata = &dev_ad; - addr = of_get_property(node, "reg", &len); - if (!addr || (len < sizeof(int))) { - dev_err(&adap->dev, "of_i2c: invalid reg on %s\n", - node->full_name); - continue; - } + if (of_get_property(node, "wakeup-source", NULL)) + info.flags |= I2C_CLIENT_WAKE; - info.addr = be32_to_cpup(addr); - if (info.addr > (1 << 10) - 1) { - dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n", - info.addr, node->full_name); - continue; - } + request_module("%s%s", I2C_MODULE_PREFIX, info.type); - info.irq = irq_of_parse_and_map(node, 0); - info.of_node = of_node_get(node); - info.archdata = &dev_ad; + result = i2c_new_device(adap, &info); + if (result == NULL) { + dev_err(&adap->dev, "of_i2c: Failure registering %s\n", + node->full_name); + of_node_put(node); + irq_dispose_mapping(info.irq); + return ERR_PTR(-EINVAL); + } + return result; +} + +static void internal_of_i2c_register_devices(struct i2c_adapter *adap) +{ + struct device_node *node; - if (of_get_property(node, "wakeup-source", NULL)) - info.flags |= I2C_CLIENT_WAKE; + /* Only register child devices if the adapter has a node pointer set */ + if (!adap->dev.of_node) + return; - request_module("%s%s", I2C_MODULE_PREFIX, info.type); + dev_dbg(&adap->dev, "of_i2c: walking child nodes\n"); - result = i2c_new_device(adap, &info); - if (result == NULL) { - dev_err(&adap->dev, "of_i2c: Failure registering %s\n", - node->full_name); - of_node_put(node); - irq_dispose_mapping(info.irq); - continue; - } - } + for_each_available_child_of_node(adap->dev.of_node, node) + of_i2c_register_device(adap, node); } static int of_dev_node_match(struct device *dev, void *data) |