Hello,
Am 08.06.2024 um 16:38 schrieb Heiko Stuebner:
Am Donnerstag, 6. Juni 2024, 15:13:20 CEST schrieb Space Meyer:
On 02.06.2024 22:20, Sebastian Kropatsch wrote:
Some RK3588 boards are still using this property, the following quote
is from rk3588-tiger-haikou.dts for example:
&sdmmc {
/* while the same pin, sdmmc_det does not detect card changes */
cd-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_LOW>;
I am unsure as to whether this comment from the quote might apply for
the CM3588 as well. Please let me know if you are able to tell :-)
I don't quite understand this. However GPIO0_A4 *is* routed to the micro
sd CD according to the NAS schematic, page 16 around A5.
for the actual sdmmc_det functionality ... possibly some pinconfig thing?
I.e. pull-whatever settings?
I have no idea. I just removed the "cd-gpios" line in v2 due to a
suggestion by Jonas Karlman and then stumbled over this comment.
So I'm not sure whether to include or not include this property
for the CM3588 NAS since I don't know the consequences.
Probably in the end it doesn't even matter :)
+ vcc_3v3_pcie30: regulator-vcc-3v3-pcie30 {
+ compatible = "regulator-fixed";
+ regulator-name = "vcc_3v3_pcie30";
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ vin-supply = <&vcc_5v0_sys>;
+ };
These are 4 seperate regulators according to the schematic. However, as
they are all fixed, idk if they should be split or kept like this.
personally, I really like the power-diagram to match schematics.
I.e. $debugfs/regulator/regulator_summary will produce a really nice
graph of all the system's regulators, so it's definitly nice if the
hirarchy matches. Also prevents head-scratching later on ;-)
These are indeed 4 different regulators according to the schematic.[1]
But they don't have any pin to control them separately. I can
duplicate them 4 times if that's the preferred practice.
But matching the schematics won't be possible either way, since
e.g. there is only one single 5v regulator acc. to the schematic
(vcc_5v0_sys), but vcc_5v0_host_20, vcc_5v0_host_30, vbus_5v0_typec
and so on are needed since each device has a different control pin
to enable its power. Or is there a better way to solve this while
having only one 5v regulator node but still being able to set the
control pins separately for the different USB ports?
Cheers,
Sebastian
[1]
https://wiki.friendlyelec.com/wiki/images/1/15/CM3588_NAS_SDK_2309_SCH.PDF
