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| author | Grant Likely <grant.likely@secretlab.ca> | 2010-06-08 07:48:18 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-07-05 16:14:52 -0600 |
| commit | 9fd049927ccba1c1d0343239b82f28c4e07fb95d (patch) | |
| tree | e7d86e42e2643e1376c102f00c0e76d14cf65f86 /drivers/of | |
| parent | 4f0ddcb020ef8afae65b4edb9aeb4a42ab74f4cf (diff) | |
| download | linux-3.10-9fd049927ccba1c1d0343239b82f28c4e07fb95d.tar.gz linux-3.10-9fd049927ccba1c1d0343239b82f28c4e07fb95d.tar.bz2 linux-3.10-9fd049927ccba1c1d0343239b82f28c4e07fb95d.zip | |
of/i2c: Generalize OF support
This patch cleans up the i2c OF support code to make it selectable by
all architectures and allow for automatic registration of i2c devices.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/of/of_i2c.c | 50 |
2 files changed, 30 insertions, 22 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 097f42aebe9..80dd6318db6 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -26,7 +26,7 @@ config OF_GPIO config OF_I2C def_tristate I2C - depends on (PPC_OF || MICROBLAZE) && I2C + depends on OF && !SPARC && I2C help OpenFirmware I2C accessors diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c index ab6522c8e4f..0a694debd22 100644 --- a/drivers/of/of_i2c.c +++ b/drivers/of/of_i2c.c @@ -14,57 +14,65 @@ #include <linux/i2c.h> #include <linux/of.h> #include <linux/of_i2c.h> +#include <linux/of_irq.h> #include <linux/module.h> -void of_register_i2c_devices(struct i2c_adapter *adap, - struct device_node *adap_node) +void of_i2c_register_devices(struct i2c_adapter *adap) { void *result; struct device_node *node; - for_each_child_of_node(adap_node, node) { + /* Only register child devices if the adapter has a node pointer set */ + if (!adap->dev.of_node) + return; + + dev_dbg(&adap->dev, "of_i2c: walking child nodes\n"); + + for_each_child_of_node(adap->dev.of_node, node) { struct i2c_board_info info = {}; struct dev_archdata dev_ad = {}; const __be32 *addr; int len; - if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) + dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); + + 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; + } addr = of_get_property(node, "reg", &len); - if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) { - printk(KERN_ERR - "of-i2c: invalid i2c device entry\n"); + if (!addr || (len < sizeof(int))) { + dev_err(&adap->dev, "of_i2c: invalid reg on %s\n", + node->full_name); continue; } - info.irq = irq_of_parse_and_map(node, 0); - 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; + } - info.of_node = node; + info.irq = irq_of_parse_and_map(node, 0); + info.of_node = of_node_get(node); info.archdata = &dev_ad; request_module("%s", info.type); result = i2c_new_device(adap, &info); if (result == NULL) { - printk(KERN_ERR - "of-i2c: Failed to load driver for %s\n", - info.type); + dev_err(&adap->dev, "of_i2c: Failure registering %s\n", + node->full_name); + of_node_put(node); irq_dispose_mapping(info.irq); continue; } - - /* - * Get the node to not lose the dev_archdata->of_node. - * Currently there is no way to put it back, as well as no - * of_unregister_i2c_devices() call. - */ - of_node_get(node); } } -EXPORT_SYMBOL(of_register_i2c_devices); +EXPORT_SYMBOL(of_i2c_register_devices); static int of_dev_node_match(struct device *dev, void *data) { |