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 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 = "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";
};
@@ -239,7 +239,7 @@ 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";
};
@@ -272,8 +272,8 @@ 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";
};
@@ -287,8 +287,8 @@ 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";
};
};
@@ -315,7 +315,7 @@ 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";
};
@@ -328,7 +328,7 @@ 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
