From d9175bbd5d6e4477e5ecd6e8e98a626d5bde34ea Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Sat, 26 Aug 2023 22:26:37 +0100 Subject: [PATCH] mediatek: i2c: mt65xx: allow optional pmic clock Using the I2C host controller on the MT7981 SoC requires 4 clocks to be enabled. One of them, the pmic clk, is only enabled in case 'mediatek,have-pmic' is also set which has other consequences which are not desired in this case. Allow defining a pmic clk even in case the 'mediatek,have-pmic' propterty is not present and the bus is not used to connect to a pmic, but may still require to enable the pmic clock. Signed-off-by: Daniel Golle (cherry picked from commit 2544dc34f2a6e5721096ee62efa66d36d45b2dd1) --- ...i2c-mt65xx-allow-optional-pmic-clock.patch | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 target/linux/mediatek/patches-5.15/855-i2c-mt65xx-allow-optional-pmic-clock.patch diff --git a/target/linux/mediatek/patches-5.15/855-i2c-mt65xx-allow-optional-pmic-clock.patch b/target/linux/mediatek/patches-5.15/855-i2c-mt65xx-allow-optional-pmic-clock.patch new file mode 100644 index 0000000000..69cc155d8d --- /dev/null +++ b/target/linux/mediatek/patches-5.15/855-i2c-mt65xx-allow-optional-pmic-clock.patch @@ -0,0 +1,45 @@ +From 3bf827929a44c17bfb1bf1000b143c02ce26a929 Mon Sep 17 00:00:00 2001 +From: Daniel Golle +Date: Sat, 26 Aug 2023 21:56:51 +0100 +Subject: [PATCH] i2c: mt65xx: allow optional pmic clock + +Using the I2C host controller on the MT7981 SoC requires 4 clocks to +be enabled. One of them, the pmic clk, is only enabled in case +'mediatek,have-pmic' is also set which has other consequences which +are not desired in this case. + +Allow defining a pmic clk even in case the 'mediatek,have-pmic' propterty +is not present and the bus is not used to connect to a pmic, but may +still require to enable the pmic clock. + +Signed-off-by: Daniel Golle +--- + drivers/i2c/busses/i2c-mt65xx.c | 12 ++++++++---- + 1 file changed, 8 insertions(+), 4 deletions(-) + +--- a/drivers/i2c/busses/i2c-mt65xx.c ++++ b/drivers/i2c/busses/i2c-mt65xx.c +@@ -1444,15 +1444,19 @@ static int mtk_i2c_probe(struct platform + if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk)) + return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_ARB].clk); + ++ i2c->clocks[I2C_MT65XX_CLK_PMIC].clk = devm_clk_get_optional(&pdev->dev, "pmic"); ++ if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk)) { ++ dev_err(&pdev->dev, "cannot get pmic clock\n"); ++ return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk); ++ } ++ + if (i2c->have_pmic) { +- i2c->clocks[I2C_MT65XX_CLK_PMIC].clk = devm_clk_get(&pdev->dev, "pmic"); +- if (IS_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk)) { ++ if (!i2c->clocks[I2C_MT65XX_CLK_PMIC].clk) { + dev_err(&pdev->dev, "cannot get pmic clock\n"); +- return PTR_ERR(i2c->clocks[I2C_MT65XX_CLK_PMIC].clk); ++ return -ENODEV; + } + speed_clk = I2C_MT65XX_CLK_PMIC; + } else { +- i2c->clocks[I2C_MT65XX_CLK_PMIC].clk = NULL; + speed_clk = I2C_MT65XX_CLK_MAIN; + } + -- 2.30.2