From: Clark Wang <xiaoning.wang@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Jun Li <jun.li@xxxxxxx>
Signed-off-by: Clark Wang <xiaoning.wang@xxxxxxx>
Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
---
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
