Am 25.11.24 um 11:03 schrieb Christoph Stoidner:
Hi Stefan,
On Mo, 2024-11-25 at 10:39 +0100, Stefan Wahren wrote:
Hi Christoph,
Am 25.11.24 um 09:28 schrieb Christoph Stoidner:
Hi Stefan,
On Do, 2024-11-21 at 11:12 +0100, Stefan Wahren wrote:
Hi Christoph,
Am 20.11.24 um 17:31 schrieb Christoph Stoidner:
[...]
diff --git a/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
b/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
index 6897c91f4d..702d86f4e0 100644
--- a/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
+++ b/arch/arm/dts/imx93-phyboard-segin-u-boot.dtsi
@@ -139,6 +139,13 @@
&usdhc1 {
bootph-pre-ram;
bootph-some-ram;
+ /*
+ * Remove pinctrl assignments once they are added to
imx93-
phycore-som.dtsi
+ */
+ pinctrl-names = "default", "state_100mhz",
"state_200mhz";
+ pinctrl-0 = <&pinctrl_usdhc1>;
+ pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
+ pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
};
&usdhc2 {
@@ -215,6 +222,48 @@
MX93_PAD_ENET2_RD3__GPIO4_IO27
0x31e
>;
};
+
+ /*
+ * Remove pinctrl_usdhc1_100mhz and
pinctrl_usdhc1_200mhz
once they
+ * are added to imx93-phycore-som.dtsi
+ */
+ /* need to config the SION for data and cmd pad, refer
to
ERR052021 */
+ pinctrl_usdhc1_100mhz: usdhc1-100mhzgrp {
+ bootph-pre-ram;
+ bootph-some-ram;
+ fsl,pins = <
+ MX93_PAD_SD1_CLK__USDHC1_CLK
0x1
7be
+ MX93_PAD_SD1_CMD__USDHC1_CMD
0x4
000139e
+ MX93_PAD_SD1_DATA0__USDHC1_DATA0
0x4
000138e
+ MX93_PAD_SD1_DATA1__USDHC1_DATA1
0x4
000139e
+ MX93_PAD_SD1_DATA2__USDHC1_DATA2
0x4
00013be
Could you please explain why the pin configuration for 100 MHz of
DATA0
& DATA2 is different from the other data pins?
The difference in the values is due to different drive-strength
settings per pin. The values are the result of measurements we
did for the eMMC interface. There, we adjusted each pin's
drive-strength to get it's best signal quality.
Thanks for the explanation. So you measured also the 200 MHz case?
Because there are no differences between the data pins.
Yes, we measured also for 200 MHz. There the same value was perfect
for all pins.
Great, I'm fine with the whole series.
