| Message ID | 20211206142929.26729-1-marten.lindahl@axis.com |
|---|---|
| Headers | show |
| Series | Add ARTPEC-8 support to DWMMC controller | expand |
On 06/12/2021 15:29, Mårten Lindahl wrote: > The ARTPEC-8 SoC has a DWMMC controller that is compatible with the > Exynos 7 version v2.70a. The main differences from Exynos 7 is that it > does not support HS400 and has extended data read timeout. > > Add compatibility string "axis,artpec8-dw-mshc" for ARTPEC-8. > > Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com> > --- > > v2: > - Change compatible string vendor prefix > > Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt > index 0419a63f73a0..753e9d7d8956 100644 > --- a/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt > +++ b/Documentation/devicetree/bindings/mmc/exynos-dw-mshc.txt > @@ -22,6 +22,8 @@ Required Properties: > specific extensions. > - "samsung,exynos7-dw-mshc-smu": for controllers with Samsung Exynos7 > specific extensions having an SMU. > + - "axis,artpec8-dw-mshc": for controllers with ARTPEC-8 specific > + extensions. > > * samsung,dw-mshc-ciu-div: Specifies the divider value for the card interface > unit (ciu) clock. This property is applicable only for Exynos5 SoC's and > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Best regards, Krzysztof
Hi! The ARTPEC-8 SoC has a DWMMC controller that is compatible with the Exynos 7 version v2.70a. The main differences from Exynos 7 is that it does not support HS400 and has an extended data read timeout. To run this controller we need to add compatibility for ARTPEC-8, because we need a quirk to separate the configuration of the TMOUT register from the non ARTPEC-8 versions. This patchset is dependent on 2 changes that has been added to the mmc git next branch, but has not yet been merged to mainline: Patch 2 of this patchset depends on commit 0e6f2c4c2072b ("mmc: dw_mmc: add common capabilities to replace caps"). Patch 3 of this patchset depends on commit d5bc33487eab3 ("mmc: dw_mmc: Allow lower TMOUT value than maximum"). Kind regards Mårten Lindahl Changes in v2: - Change compatible string vendor prefix - Removed unnecessary comment - Change 1<<0 to BIT(0) Mårten Lindahl (4): dt-bindings: mmc: exynos-dw-mshc: Add support for ARTPEC-8 mmc: dw_mmc-exynos: Add support for ARTPEC-8 mmc: dw_mmc: Add quirk for extended data read timeout mmc: dw_mmc: Do not wait for DTO in case of error .../bindings/mmc/exynos-dw-mshc.txt | 2 + drivers/mmc/host/dw_mmc-exynos.c | 52 +++++++++++++++---- drivers/mmc/host/dw_mmc.c | 41 +++++++++++++-- drivers/mmc/host/dw_mmc.h | 6 +++ 4 files changed, 86 insertions(+), 15 deletions(-)