imx8mq: phycore-imx8mp

[Teresa Remmet]

Hello Heiko,

Am Donnerstag, den 25.02.2021, 14:46 +0100 schrieb Heiko Schocher:
> Hello Peng, Teresa,
> 
> I am just trying to get linux-stable 5.10.y kernel with current
> mainline
> U-Boot on the pyhcore imx8mp board up and running, and fail detecting
> sd
> card on usdhc2 in linux.
> 
> With U-Boot 2021.01 *same* kernel image/dts detects fine the sd card
> on
> usdhc2. So I have no idea, why kernel is here dependent on U-Boot
> setup!
> Which is also a bug I think ...
> 
> @Peng: Now started a small git bisect in U-Boot tree and your commit
> 
> cf8842bc29 - arm: dts: imx8mp: sync dts from Linux Kernel
> 
> poped up... with the commit before:
> 
> 374866a724 - imx8m: clock: add type of set_clk_eqos
> 
> the phycore imx8mp board boots fine linux kernel and kernel detects
> sd card...
> 
> Attention: The phytec board support came later into u-boot tree with
> commit:
> 
> c661c511e9 - board: phytec: imx8mp: Add PHYTEC phyCORE-i.MX8MP
> support
> 
> So the board support patch was pending on the list and not tested
> with
> your patches I think...

yes, there where not.

> 
> Any ideas, what could be the problem?

So far I was able to narrow it down to the changes done in the 
clock-controller at 30380000 node of arch/arm/dts/imx8mp.dtsi:

--- a/arch/arm/dts/imx8mp.dtsi
+++ b/arch/arm/dts/imx8mp.dtsi
@@ -383,6 +383,22 @@
                                                  <&clk
IMX8MP_CLK_IPG_AUDIO_ROOT>,
                                                  <&clk
IMX8MP_AUDIO_PLL1>,
                                                  <&clk
IMX8MP_AUDIO_PLL2>;
+                               assigned-clock-parents = <&clk
IMX8MP_SYS_PLL1_800M>,
+                                                        <&clk
IMX8MP_ARM_PLL_OUT>,
+                                                        <&clk
IMX8MP_SYS_PLL2_1000M>,
+                                                        <&clk
IMX8MP_SYS_PLL1_800M>,
+                                                        <&clk
IMX8MP_SYS_PLL2_500M>,
+                                                        <&clk
IMX8MP_SYS_PLL1_800M>,
+                                                        <&clk
IMX8MP_SYS_PLL1_800M>;
+                               assigned-clock-rates = <0>, <0>,
+                                                      <1000000000>,
+                                                      <800000000>,
+                                                      <500000000>,
+                                                      <400000000>,
+                                                      <800000000>,
+                                                      <400000000>,
+                                                      <393216000>,
+                                                      <361267200>;

If I remove this part again it is booting. 

Regards,
Teresa

> 
> Thanks!
> 
> bye,
> Heiko