On the MK808 only a microSD slot is connected with the SDMMC Host Controller,
so remove the cap-mmc-highspeed property from the &mmc0 node.
Signed-off-by: Johan Jonker <redacted>
---
arch/arm/boot/dts/rk3066a-mk808.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/rk3066a-mk808.dts b/arch/arm/boot/dts/rk3066a-mk808.dts
index 9790bc63b..b67f5cb51 100644
--- a/arch/arm/boot/dts/rk3066a-mk808.dts
+++ b/arch/arm/boot/dts/rk3066a-mk808.dts
@@ -123,7 +123,6 @@
&mmc0 {
bus-width = <4>;
- cap-mmc-highspeed;
cap-sd-highspeed;
vmmc-supply = <&vcc_sd>;
status = "okay";--
2.20.1
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On 2021-08-20 14:19, Johan Jonker wrote:
On the MK808 only a microSD slot is connected with the SDMMC Host Controller,
so remove the cap-mmc-highspeed property from the &mmc0 node.
Why, does it do any harm? It's perfectly possible to connect a
full-sized card to a microSD slot with an adapter. I came across my old
SDIO WiFi card a while back and tried it that way for a giggle, but
unfortunately it turned out not to be a chipset supported by any
upstream driver.
Robin.
quoted hunk
Signed-off-by: Johan Jonker <redacted>
---
arch/arm/boot/dts/rk3066a-mk808.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/rk3066a-mk808.dts b/arch/arm/boot/dts/rk3066a-mk808.dts
index 9790bc63b..b67f5cb51 100644
--- a/arch/arm/boot/dts/rk3066a-mk808.dts
+++ b/arch/arm/boot/dts/rk3066a-mk808.dts
@@ -123,7 +123,6 @@
&mmc0 {
bus-width = <4>;
- cap-mmc-highspeed;
cap-sd-highspeed;
vmmc-supply = <&vcc_sd>;
status = "okay";
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On 8/20/21 4:17 PM, Robin Murphy wrote:
On 2021-08-20 14:19, Johan Jonker wrote:
quoted
On the MK808 only a microSD slot is connected with the SDMMC Host
Controller,
so remove the cap-mmc-highspeed property from the &mmc0 node.
Why, does it do any harm?
Harm not. Example rk3066 u-boot:
quoted
quoted
quoted
sd_select_mode_and_width
sd card: widths [4, 1, ] modes [MMC legacy, SD High Speed (50MHz), UHS
SDR12 (25MHz), UHS SDR25 (50MHz), ]
host: widths [4, 1, ] modes [MMC legacy, MMC High Speed (26MHz), SD
High Speed (50MHz), MMC High Speed (52MHz), ]
trying mode SD High Speed (50MHz) width 4 (at 50 MHz)
I would say only advertise host capabilities that are under normal
circumstances occur. How realistic is it to use a TF/Micro SD TO SD Card
Extension Cable Adapter (giggle) for a deprecated mmc card?
Johan
It's perfectly possible to connect a
full-sized card to a microSD slot with an adapter. I came across my old
SDIO WiFi card a while back and tried it that way for a giggle, but
unfortunately it turned out not to be a chipset supported by any
upstream driver.
Robin.
quoted
Signed-off-by: Johan Jonker <redacted>
---
arch/arm/boot/dts/rk3066a-mk808.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/rk3066a-mk808.dts
b/arch/arm/boot/dts/rk3066a-mk808.dts
index 9790bc63b..b67f5cb51 100644
--- a/arch/arm/boot/dts/rk3066a-mk808.dts
+++ b/arch/arm/boot/dts/rk3066a-mk808.dts
&mmc0 {
bus-width = <4>;
- cap-mmc-highspeed;
cap-sd-highspeed;
vmmc-supply = <&vcc_sd>;
status = "okay";
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On 2021-08-20 15:41, Johan Jonker wrote:
On 8/20/21 4:17 PM, Robin Murphy wrote:
quoted
On 2021-08-20 14:19, Johan Jonker wrote:
quoted
On the MK808 only a microSD slot is connected with the SDMMC Host
Controller,
so remove the cap-mmc-highspeed property from the &mmc0 node.
Why, does it do any harm?
Harm not. Example rk3066 u-boot:
quoted
quoted
quoted
quoted
sd_select_mode_and_width
sd card: widths [4, 1, ] modes [MMC legacy, SD High Speed (50MHz), UHS
SDR12 (25MHz), UHS SDR25 (50MHz), ]
host: widths [4, 1, ] modes [MMC legacy, MMC High Speed (26MHz), SD
High Speed (50MHz), MMC High Speed (52MHz), ]
trying mode SD High Speed (50MHz) width 4 (at 50 MHz)
I would say only advertise host capabilities that are under normal
circumstances occur. How realistic is it to use a TF/Micro SD TO SD Card
Extension Cable Adapter (giggle) for a deprecated mmc card?
Well, if you want a far more realistic example:
https://www.hardkernel.com/shop/emmc-module-reader-board-for-os-upgrade/
Who are we to dictate what "normal circumstances" are, and what do we
gain by removing support for modes that could work fine and at least be
useful to someone on occasion?
Robin.
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