[] [Add auxadc 32k clk]
[Description]
Add auxadc 32k clk
[Release-log]
N/A
Change-Id: I5703432e8ddfaf7f14a85e53ce6db1d5212c6cc5
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4860995
diff --git a/target/linux/mediatek/patches-5.4/500-auxadc-add-auxadc-32k-clk.patch b/target/linux/mediatek/patches-5.4/500-auxadc-add-auxadc-32k-clk.patch
new file mode 100644
index 0000000..dc0dd2f
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/500-auxadc-add-auxadc-32k-clk.patch
@@ -0,0 +1,68 @@
+diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
+index 2449d91..b8a43eb 100644
+--- a/drivers/iio/adc/mt6577_auxadc.c
++++ b/drivers/iio/adc/mt6577_auxadc.c
+@@ -42,6 +42,7 @@ struct mtk_auxadc_compatible {
+ struct mt6577_auxadc_device {
+ void __iomem *reg_base;
+ struct clk *adc_clk;
++ struct clk *adc_32k_clk;
+ struct mutex lock;
+ const struct mtk_auxadc_compatible *dev_comp;
+ };
+@@ -214,6 +215,12 @@ static int __maybe_unused mt6577_auxadc_resume(struct device *dev)
+ return ret;
+ }
+
++ ret = clk_prepare_enable(adc_dev->adc_32k_clk);
++ if (ret) {
++ pr_err("failed to enable auxadc clock\n");
++ return ret;
++ }
++
+ mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+ MT6577_AUXADC_PDN_EN, 0);
+ mdelay(MT6577_AUXADC_POWER_READY_MS);
+@@ -228,6 +235,8 @@ static int __maybe_unused mt6577_auxadc_suspend(struct device *dev)
+
+ mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+ 0, MT6577_AUXADC_PDN_EN);
++
++ clk_disable_unprepare(adc_dev->adc_32k_clk);
+ clk_disable_unprepare(adc_dev->adc_clk);
+
+ return 0;
+@@ -272,6 +281,17 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
+ return ret;
+ }
+
++ adc_dev->adc_32k_clk = devm_clk_get(&pdev->dev, "32k");
++ if (IS_ERR(adc_dev->adc_32k_clk)) {
++ dev_err(&pdev->dev, "failed to get auxadc 32k clock\n");
++ } else {
++ ret = clk_prepare_enable(adc_dev->adc_32k_clk);
++ if (ret) {
++ dev_err(&pdev->dev, "failed to enable auxadc 32k clock\n");
++ return ret;
++ }
++ }
++
+ adc_clk_rate = clk_get_rate(adc_dev->adc_clk);
+ if (!adc_clk_rate) {
+ ret = -EINVAL;
+@@ -301,6 +321,7 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
+ mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+ 0, MT6577_AUXADC_PDN_EN);
+ err_disable_clk:
++ clk_disable_unprepare(adc_dev->adc_32k_clk);
+ clk_disable_unprepare(adc_dev->adc_clk);
+ return ret;
+ }
+@@ -315,6 +336,7 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
+ mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+ 0, MT6577_AUXADC_PDN_EN);
+
++ clk_disable_unprepare(adc_dev->adc_32k_clk);
+ clk_disable_unprepare(adc_dev->adc_clk);
+
+ return 0;