openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

mmc: sdhci-cadence: override spec version 

The datasheet of the IP (sd4hc) says it is compiatible with SDHCI v4,
but the spec version field in the version register is read as 2
(i.e. SDHCI_SPEC_300) based on the RTL provided by Cadence.

Socionext did not fix it up when it integrated the IP into the SoCs.
So, it is working as SDHCI v3.

It is not a real problem because there is no difference in the program
flow in sdhci.c between SDHCI_SPEC_300/400, but set the real version
just in case.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masahiro Yamada 2019-08-29 19:49:28 +09:00 committed by Ulf Hansson
parent 8784edc8fa
commit 12a632e60a
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/host/sdhci-cadence.c
View File

@ -340,6 +340,7 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
unsigned int nr_phy_params;
int ret;
struct device *dev = &pdev->dev;
static const u16 version = SDHCI_SPEC_400 << SDHCI_SPEC_VER_SHIFT;
clk = devm_clk_get(dev, NULL);
if (IS_ERR(clk))
@ -369,6 +370,7 @@ static int sdhci_cdns_probe(struct platform_device *pdev)
host->mmc_host_ops.hs400_enhanced_strobe =
sdhci_cdns_hs400_enhanced_strobe;
sdhci_enable_v4_mode(host);
__sdhci_read_caps(host, &version, NULL, NULL);
sdhci_get_of_property(pdev);