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mmc: sdhci: Let drivers define their DMA mask

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Add host operation ->set_dma_mask() so that drivers can define their own
DMA masks.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Cc: stable@vger.kernel.org # v4.15 +
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2019-09-23 12:08:09 +02:00 committed by Ulf Hansson
parent 121bd08b02
commit 4ee7dde4c7
2 changed files with 5 additions and 8 deletions
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12
drivers/mmc/host/sdhci.c
View file

@ -3781,18 +3781,14 @@ int sdhci_setup_host(struct sdhci_host *host)
host->flags &= ~SDHCI_USE_ADMA;
}
/*
* It is assumed that a 64-bit capable device has set a 64-bit DMA mask
* and *must* do 64-bit DMA. A driver has the opportunity to change
* that during the first call to ->enable_dma(). Similarly
* SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
* implement.
*/
if (sdhci_can_64bit_dma(host))
host->flags |= SDHCI_USE_64_BIT_DMA;
if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
ret = sdhci_set_dma_mask(host);
if (host->ops->set_dma_mask)
ret = host->ops->set_dma_mask(host);
else
ret = sdhci_set_dma_mask(host);
if (!ret && host->ops->enable_dma)
ret = host->ops->enable_dma(host);

1
drivers/mmc/host/sdhci.h
View file

@ -622,6 +622,7 @@ struct sdhci_ops {
u32 (*irq)(struct sdhci_host *host, u32 intmask);
int (*set_dma_mask)(struct sdhci_host *host);
int (*enable_dma)(struct sdhci_host *host);
unsigned int (*get_max_clock)(struct sdhci_host *host);
unsigned int (*get_min_clock)(struct sdhci_host *host);