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| author | Andrew Jeffery <andrew@aj.id.au> | 2019-08-07 10:06:29 +0930 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-09-11 15:58:39 +0200 |
| commit | bb7b8ec62dfb9b255027c3a54d01f12fc3bd1d2c (patch) | |
| tree | 125383ed1c1deb7c757ba1a3144d53aea38fdce7 /drivers/mmc/host/Kconfig | |
| parent | 7a7e55f416b63ebd85b69974bb3a6f4a10158982 (diff) | |
| download | linux-bb7b8ec62dfb9b255027c3a54d01f12fc3bd1d2c.tar.gz linux-bb7b8ec62dfb9b255027c3a54d01f12fc3bd1d2c.tar.bz2 linux-bb7b8ec62dfb9b255027c3a54d01f12fc3bd1d2c.zip | |
mmc: sdhci-of-aspeed: Add support for the ASPEED SD controller
Add a minimal driver for ASPEED's SD controller, which exposes two
SDHCIs.
The ASPEED design implements a common register set for the SDHCIs, and
moves some of the standard configuration elements out to this common
area (e.g. 8-bit mode, and card detect configuration which is not
currently supported).
The SD controller has a dedicated hardware interrupt that is shared
between the slots. The common register set exposes information on which
slot triggered the interrupt; early revisions of the patch introduced an
irqchip for the register, but reality is it doesn't behave as an
irqchip, and the result fits awkwardly into the irqchip APIs. Instead
I've taken the simple approach of using the IRQ as a shared IRQ with
some minor performance impact for the second slot.
Ryan was the original author of the patch - I've taken his work and
massaged it to drop the irqchip support and rework the devicetree
integration. The driver has been smoke tested under qemu against a
minimal SD controller model and lightly tested on an ast2500-evb.
Signed-off-by: Ryan Chen <ryanchen.aspeed@gmail.com>
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/Kconfig')
| -rw-r--r-- | drivers/mmc/host/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 14d89a108edd..0f8a230de2f3 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -154,6 +154,18 @@ config MMC_SDHCI_OF_ARASAN If unsure, say N. +config MMC_SDHCI_OF_ASPEED + tristate "SDHCI OF support for the ASPEED SDHCI controller" + depends on MMC_SDHCI_PLTFM + depends on OF + help + This selects the ASPEED Secure Digital Host Controller Interface. + + If you have a controller with this interface, say Y or M here. You + also need to enable an appropriate bus interface. + + If unsure, say N. + config MMC_SDHCI_OF_AT91 tristate "SDHCI OF support for the Atmel SDMMC controller" depends on MMC_SDHCI_PLTFM |