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| author | Neil Armstrong <narmstrong@baylibre.com> | 2019-05-27 14:43:05 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-06-10 17:11:09 +0200 |
| commit | 5a46b6fa0f33c2ca7a8432a0a48e1bf4a71fcc9f (patch) | |
| tree | 3e71f4231fd458200515d4f29bbd734da0b545ce /Documentation/devicetree/bindings/mmc | |
| parent | mmc: meson-gx-mmc: update with SPDX Licence identifier (diff) | |
| download | linux-5a46b6fa0f33c2ca7a8432a0a48e1bf4a71fcc9f.tar.xz linux-5a46b6fa0f33c2ca7a8432a0a48e1bf4a71fcc9f.zip | |
dt-bindings: mmc: meson-gx: add dram-access-quirk property
On the Amlogic G12A SoC family, (only) the SDIO controller has a bug which
makes any DRAM access from the MMC controller fail.
Add the amlogic,dram-access-quirk property so signal this particular
controller has this bug and needs a quirk to work properly.
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt index 13e70409e8ac..ccc5358db131 100644 --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt @@ -22,6 +22,10 @@ Required properties: clock rate requested by the MMC core. - resets : phandle of the internal reset line +Optional properties: +- amlogic,dram-access-quirk: set when controller's internal DMA engine cannot access the + DRAM memory, like on the G12A dedicated SDIO controller. + Example: sd_emmc_a: mmc@70000 { |