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authorLinus Torvalds <torvalds@linux-foundation.org>2015-07-11 11:24:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-11 11:24:15 -0700
commite49251988b10e8787baa5f3d8ffd154e003f0963 (patch)
tree71f4b8a8dea7dc17f78ee0368d855a6f14ca1298
parent8a7b8ff41ddc811f3e06d0bf6892bc3e2b1764b7 (diff)
parent4f001fd30145a6a8f72f9544c982cfd3dcb7c6df (diff)
downloadop-kernel-dev-e49251988b10e8787baa5f3d8ffd154e003f0963.zip
op-kernel-dev-e49251988b10e8787baa5f3d8ffd154e003f0963.tar.gz
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang: "Mostly slight adjusments for new drivers, but also one core fix for which finally the dependencies are now available as well" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: Mark instantiated device nodes with OF_POPULATE i2c: jz4780: Fix return value if probe fails i2c: xgene-slimpro: Fix missing mbox_free_channel call in probe error path i2c: I2C_MT65XX should depend on HAS_DMA
-rw-r--r--drivers/i2c/busses/Kconfig1
-rw-r--r--drivers/i2c/busses/i2c-jz4780.c15
-rw-r--r--drivers/i2c/busses/i2c-xgene-slimpro.c1
-rw-r--r--drivers/i2c/i2c-core.c16
4 files changed, 25 insertions, 8 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 35ac237..577d58d 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -633,6 +633,7 @@ config I2C_MPC
config I2C_MT65XX
tristate "MediaTek I2C adapter"
depends on ARCH_MEDIATEK || COMPILE_TEST
+ depends on HAS_DMA
help
This selects the MediaTek(R) Integrated Inter Circuit bus driver
for MT65xx and MT81xx.
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c
index 19b2d68..f325663 100644
--- a/drivers/i2c/busses/i2c-jz4780.c
+++ b/drivers/i2c/busses/i2c-jz4780.c
@@ -764,12 +764,15 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
if (IS_ERR(i2c->clk))
return PTR_ERR(i2c->clk);
- clk_prepare_enable(i2c->clk);
+ ret = clk_prepare_enable(i2c->clk);
+ if (ret)
+ return ret;
- if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
- &clk_freq)) {
+ ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
+ &clk_freq);
+ if (ret) {
dev_err(&pdev->dev, "clock-frequency not specified in DT");
- return clk_freq;
+ goto err;
}
i2c->speed = clk_freq / 1000;
@@ -790,10 +793,8 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
i2c->irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(&pdev->dev, i2c->irq, jz4780_i2c_irq, 0,
dev_name(&pdev->dev), i2c);
- if (ret) {
- ret = -ENODEV;
+ if (ret)
goto err;
- }
ret = i2c_add_adapter(&i2c->adap);
if (ret < 0) {
diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c
index dcca707..1c9cb65 100644
--- a/drivers/i2c/busses/i2c-xgene-slimpro.c
+++ b/drivers/i2c/busses/i2c-xgene-slimpro.c
@@ -419,6 +419,7 @@ static int xgene_slimpro_i2c_probe(struct platform_device *pdev)
rc = i2c_add_adapter(adapter);
if (rc) {
dev_err(&pdev->dev, "Adapter registeration failed\n");
+ mbox_free_channel(ctx->mbox_chan);
return rc;
}
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 069a41f..e6d4935 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1012,6 +1012,8 @@ EXPORT_SYMBOL_GPL(i2c_new_device);
*/
void i2c_unregister_device(struct i2c_client *client)
{
+ if (client->dev.of_node)
+ of_node_clear_flag(client->dev.of_node, OF_POPULATED);
device_unregister(&client->dev);
}
EXPORT_SYMBOL_GPL(i2c_unregister_device);
@@ -1320,8 +1322,11 @@ static void of_i2c_register_devices(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
- for_each_available_child_of_node(adap->dev.of_node, node)
+ for_each_available_child_of_node(adap->dev.of_node, node) {
+ if (of_node_test_and_set_flag(node, OF_POPULATED))
+ continue;
of_i2c_register_device(adap, node);
+ }
}
static int of_dev_node_match(struct device *dev, void *data)
@@ -1853,6 +1858,11 @@ static int of_i2c_notify(struct notifier_block *nb, unsigned long action,
if (adap == NULL)
return NOTIFY_OK; /* not for us */
+ if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) {
+ put_device(&adap->dev);
+ return NOTIFY_OK;
+ }
+
client = of_i2c_register_device(adap, rd->dn);
put_device(&adap->dev);
@@ -1863,6 +1873,10 @@ static int of_i2c_notify(struct notifier_block *nb, unsigned long action,
}
break;
case OF_RECONFIG_CHANGE_REMOVE:
+ /* already depopulated? */
+ if (!of_node_check_flag(rd->dn, OF_POPULATED))
+ return NOTIFY_OK;
+
/* find our device by node */
client = of_find_i2c_device_by_node(rd->dn);
if (client == NULL)
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