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authorYicong Yang <yangyicong@hisilicon.com>2021-04-08 14:17:17 +0300
committerWolfram Sang <wsa@kernel.org>2021-04-10 22:53:49 +0300
commit07740c92ae57ca21204f1e0c6f59272cdf3190cc (patch)
tree3dabbe4ca22818052082e66a9fd208fa5dc446bc /drivers/i2c/i2c-core-base.c
parent2375843b50d6139b82648499daaad2034576905b (diff)
downloadlinux-07740c92ae57ca21204f1e0c6f59272cdf3190cc.tar.xz
i2c: core: add managed function for adding i2c adapters
Some I2C controller drivers will only unregister the I2C adapter in their .remove() callback, which can be done by simply using a managed variant to add the I2C adapter. So add the managed functions for adding the I2C adapter. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/i2c-core-base.c')
-rw-r--r--drivers/i2c/i2c-core-base.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index c81cc9a09877..c4c28b585b50 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1693,6 +1693,32 @@ void i2c_del_adapter(struct i2c_adapter *adap)
}
EXPORT_SYMBOL(i2c_del_adapter);
+static void devm_i2c_del_adapter(void *adapter)
+{
+ i2c_del_adapter(adapter);
+}
+
+/**
+ * devm_i2c_add_adapter - device-managed variant of i2c_add_adapter()
+ * @dev: managing device for adding this I2C adapter
+ * @adapter: the adapter to add
+ * Context: can sleep
+ *
+ * Add adapter with dynamic bus number, same with i2c_add_adapter()
+ * but the adapter will be auto deleted on driver detach.
+ */
+int devm_i2c_add_adapter(struct device *dev, struct i2c_adapter *adapter)
+{
+ int ret;
+
+ ret = i2c_add_adapter(adapter);
+ if (ret)
+ return ret;
+
+ return devm_add_action_or_reset(dev, devm_i2c_del_adapter, adapter);
+}
+EXPORT_SYMBOL_GPL(devm_i2c_add_adapter);
+
static void i2c_parse_timing(struct device *dev, char *prop_name, u32 *cur_val_p,
u32 def_val, bool use_def)
{