From: Furong Xu <xfr@outlook.com>
Date: Fri, 16 Dec 2022 13:13:37 +0000 (+0800)
Subject: mediatek: enable sel_clk for spi-mt65xx
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=335c1e7cfdfd477a1106ca05c96ff8949ecd953f;p=openwrt%2Fstaging%2Frmilecki.git

mediatek: enable sel_clk for spi-mt65xx

Without explicitly enabling sel_clk, clk_disable_unused() will disable
it when boot is done, causing CPU hang on SPI1 register access on MT7986.
Explicitly enable sel_clk to make SPI1 functional.

Signed-off-by: Furong Xu <xfr@outlook.com>
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
---

diff --git a/target/linux/mediatek/patches-5.15/930-spi-mt65xx-enable-sel-clk.patch b/target/linux/mediatek/patches-5.15/930-spi-mt65xx-enable-sel-clk.patch
new file mode 100644
index 00000000000..904f2ef3a2f
--- /dev/null
+++ b/target/linux/mediatek/patches-5.15/930-spi-mt65xx-enable-sel-clk.patch
@@ -0,0 +1,29 @@
+--- a/drivers/spi/spi-mt65xx.c
++++ b/drivers/spi/spi-mt65xx.c
+@@ -1223,10 +1223,16 @@ static int mtk_spi_probe(struct platform
+ 		goto err_disable_spi_hclk;
+ 	}
+ 
++	ret = clk_prepare_enable(mdata->sel_clk);
++	if (ret < 0) {
++		dev_err(&pdev->dev, "failed to enable sel_clk (%d)\n", ret);
++		goto err_disable_spi_clk;
++	}
++
+ 	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
+ 	if (ret < 0) {
+ 		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
+-		goto err_disable_spi_clk;
++		goto err_disable_spi_sel_clk;
+ 	}
+ 
+ 	mdata->spi_clk_hz = clk_get_rate(mdata->spi_clk);
+@@ -1277,6 +1283,8 @@ static int mtk_spi_probe(struct platform
+ 
+ err_disable_runtime_pm:
+ 	pm_runtime_disable(&pdev->dev);
++err_disable_spi_sel_clk:
++	clk_disable_unprepare(mdata->sel_clk);
+ err_disable_spi_clk:
+ 	clk_disable_unprepare(mdata->spi_clk);
+ err_disable_spi_hclk: