[PATCH V2 6/6] arm64: dts: imx8ulp: increase the clock speed of LPSPI
From: Peng Fan (OSS) <hidden>
Date: 2022-08-31 14:25:36
Also in:
linux-arm-kernel, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Clark Wang <xiaoning.wang@nxp.com> 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 <haibo.chen@nxp.com> Reviewed-by: Jun Li <redacted> Signed-off-by: Clark Wang <xiaoning.wang@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com> --- 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/dts/freescale/imx8ulp.dtsi
index d95c0e9b15d6..06ce5f19aa8a 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi@@ -224,7 +224,7 @@ lpi2c4: i2c@29370000 { <&pcc3 IMX8ULP_CLK_LPI2C4>; clock-names = "per", "ipg"; assigned-clocks = <&pcc3 IMX8ULP_CLK_LPI2C4>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates = <48000000>; status = "disabled"; };
@@ -237,7 +237,7 @@ lpi2c5: i2c@29380000 { <&pcc3 IMX8ULP_CLK_LPI2C5>; clock-names = "per", "ipg"; assigned-clocks = <&pcc3 IMX8ULP_CLK_LPI2C5>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates = <48000000>; status = "disabled"; };
@@ -270,8 +270,8 @@ lpspi4: spi@293b0000 { <&pcc3 IMX8ULP_CLK_LPSPI4>; clock-names = "per", "ipg"; assigned-clocks = <&pcc3 IMX8ULP_CLK_LPSPI4>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; - assigned-clock-rates = <16000000>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; + assigned-clock-rates = <48000000>; status = "disabled"; };
@@ -285,8 +285,8 @@ lpspi5: spi@293c0000 { <&pcc3 IMX8ULP_CLK_LPSPI5>; clock-names = "per", "ipg"; assigned-clocks = <&pcc3 IMX8ULP_CLK_LPSPI5>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; - assigned-clock-rates = <16000000>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; + assigned-clock-rates = <48000000>; status = "disabled"; }; };
@@ -313,7 +313,7 @@ lpi2c6: i2c@29840000 { <&pcc4 IMX8ULP_CLK_LPI2C6>; clock-names = "per", "ipg"; assigned-clocks = <&pcc4 IMX8ULP_CLK_LPI2C6>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates = <48000000>; status = "disabled"; };
@@ -326,7 +326,7 @@ lpi2c7: i2c@29850000 { <&pcc4 IMX8ULP_CLK_LPI2C7>; clock-names = "per", "ipg"; assigned-clocks = <&pcc4 IMX8ULP_CLK_LPI2C7>; - assigned-clock-parents = <&cgc1 IMX8ULP_CLK_XBAR_DIVBUS>; + assigned-clock-parents = <&cgc1 IMX8ULP_CLK_FROSC_DIV2>; assigned-clock-rates = <48000000>; status = "disabled"; };
--
2.37.1