[openwrt/openwrt] lantiq: use more devm for i2c

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/44824f0b787b13e2f2fccc58256b2c42fa3f9f5d

commit 44824f0b787b13e2f2fccc58256b2c42fa3f9f5d
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Fri Oct 18 19:08:02 2024 -0700

    lantiq: use more devm for i2c
    
    i2c_add_numbered_adapter is the wrong function to use here. It requires
    setting nr to some value, otherwise it behaves the same as
    i2c_add_adapter. nr is not set.
    
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/16825
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 .../0031-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch   | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/target/linux/lantiq/patches-6.6/0031-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch b/target/linux/lantiq/patches-6.6/0031-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch
index 235e48f6de..1f2f5139d6 100644
--- a/target/linux/lantiq/patches-6.6/0031-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch
+++ b/target/linux/lantiq/patches-6.6/0031-I2C-MIPS-lantiq-add-FALC-ON-i2c-bus-master.patch
@@ -47,7 +47,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
  obj-$(CONFIG_I2C_MESON)		+= i2c-meson.o
 --- /dev/null
 +++ b/drivers/i2c/busses/i2c-lantiq.c
-@@ -0,0 +1,745 @@
+@@ -0,0 +1,742 @@
 +
 +/*
 + * Lantiq I2C bus adapter
@@ -658,7 +658,9 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
 +	}
 +
 +	init_completion(&priv->cmd_complete);
-+	mutex_init(&priv->mutex);
++	ret = devm_mutex_init(&pdev->dev, &priv->mutex);
++	if (ret)
++		return ret;
 +
 +	priv->membase = devm_platform_ioremap_resource(pdev, 0);
 +	if (IS_ERR(priv->membase))
@@ -719,7 +721,7 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
 +	clk_activate(priv->clk_gate);
 +
 +	/* add our adapter to the i2c stack */
-+	ret = i2c_add_numbered_adapter(adap);
++	ret = devm_i2c_add_adapter(&pdev->dev, adap);
 +	if (ret) {
 +		dev_err(&pdev->dev, "can't register I2C adapter\n");
 +		goto out;
@@ -737,7 +739,6 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
 +	ret = ltq_i2c_hw_init(adap);
 +	if (ret) {
 +		dev_err(&pdev->dev, "can't configure adapter\n");
-+		i2c_del_adapter(adap);
 +		platform_set_drvdata(pdev, NULL);
 +		goto out;
 +	} else {
@@ -762,10 +763,6 @@ Signed-off-by: John Crispin <blogic at openwrt.org>
 +	/* power down the core */
 +	clk_deactivate(priv->clk_gate);
 +
-+	/* remove driver */
-+	i2c_del_adapter(&priv->adap);
-+	kfree(priv);
-+
 +	dev_dbg(&pdev->dev, "removed\n");
 +	platform_set_drvdata(pdev, NULL);
 +