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charset="utf-8" From: Clark Wang LPSPI transfer max speed is half of the root clock. Increase the root clock speed to support faster data transmission. And update the parent clock of all i2c/spi with IMX8ULP_CLK_FROSC_DIV2 which could produce accurate clock for i2c/spi usage. Reviewed-by: Haibo Chen Reviewed-by: Jun Li Signed-off-by: Clark Wang Signed-off-by: Peng Fan --- arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/d= ts/freescale/imx8ulp.dtsi index 54ccf31896b7..6eeeacb2f931 100644 --- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi @@ -226,7 +226,7 @@ lpi2c4: i2c@29370000 { <&pcc3 IMX8ULP_CLK_LPI2C4>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc3 IMX8ULP_CLK_LPI2C4>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; @@ -239,7 +239,7 @@ lpi2c5: i2c@29380000 { <&pcc3 IMX8ULP_CLK_LPI2C5>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc3 IMX8ULP_CLK_LPI2C5>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; @@ -272,8 +272,8 @@ lpspi4: spi@293b0000 { <&pcc3 IMX8ULP_CLK_LPSPI4>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc3 IMX8ULP_CLK_LPSPI4>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; - assigned-clock-rates =3D <16000000>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; + assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; =20 @@ -287,8 +287,8 @@ lpspi5: spi@293c0000 { <&pcc3 IMX8ULP_CLK_LPSPI5>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc3 IMX8ULP_CLK_LPSPI5>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; - assigned-clock-rates =3D <16000000>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; + assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; }; @@ -315,7 +315,7 @@ lpi2c6: i2c@29840000 { <&pcc4 IMX8ULP_CLK_LPI2C6>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc4 IMX8ULP_CLK_LPI2C6>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; @@ -328,7 +328,7 @@ lpi2c7: i2c@29850000 { <&pcc4 IMX8ULP_CLK_LPI2C7>; clock-names =3D "per", "ipg"; assigned-clocks =3D <&pcc4 IMX8ULP_CLK_LPI2C7>; - assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents =3D <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates =3D <48000000>; status =3D "disabled"; }; --=20 2.37.1