After commit 89a5e15bcb ("gpio/mmc/of: Respect polarity in the device
tree") SD cards are not detected anymore.
The CD GPIO is "active low" on the EC-100. The MMC dt-bindings specify:
"[...] using the "cd-inverted" property means, that the CD line is active
high, i.e. it is high, when a card is inserted".
Fix the description of the SD card by marking it as GPIO_ACTIVE_LOW and
drop the "cd-inverted" property. This makes the definition consistent
with the existing dt-bindings and fixes the check whether an SD card is
inserted.
Fixes: bbedc1f1d9 ("ARM: dts: meson8b: Add support for the Endless Mini (EC-100)")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
The Endless Mini (EC-100) is a grapefruit-sized computer based on the
Amlogic Meson8b (S805) SoC which comes in two variants.
Both variants have in common:
- Amlogic Meson8b (S805) SoC
- two USB 2.0 ports on the rear, one one the front (connected to the SoC
through an internal hub)
- 3.5mm Stereo out and MIC combo port
- HDMI and CVBS output
- 5V power supply (rated at 3A / 15W)
- an internal embedded micro-controller (called "EC") which implements a
"breathing" effect for the LED and allows shutting down (powering off)
the whole device
- 10/100 Mbit/s Ethernet using an IC Plus IP101A/G PHY (note: the website
incorrectly lists a Gigabit Ethernet port)
- the CPU voltage is regulated using a PWM regulator. The GPL sources of
the EC-100 are using a PWM value of 0x1c0000 for 0.86V and a PWM value
of 0x00001c for 1.14V. When using the XTAL (24MHz) as input this
translates into a PWM period of 1148ns with 0.86V using a duty cycle of
100% and 1.14V using a duty cycle of 0%.
The main differences are:
- the main indicator for the variant is the RAM size: the "cheaper"
variant has 1 GB of RAM, while the more expensive one comes with 2GB
- the storage size differs: 24 GB vs 32 GB
- the "1 GB RAM" variant has Ethernet connectivity only, while the "2 GB"
variant has a Realtek RTL8723BS SDIO chip which adds 802.11b/g/n wifi
and Bluetooth 4.0 support
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
