| Message ID | 20221124170649.63851-5-adrian.hunter@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: sdhci: Fix voltage switch delay | expand |
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 79a50d461ee4..19e0cb7add94 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2442,8 +2442,11 @@ void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) host->drv_type = ios->drv_type; } - /* Re-enable SD Clock */ - host->ops->set_clock(host, host->clock); + if (ios->clock) { + clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL); + clk |= SDHCI_CLOCK_CARD_EN; + sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); + } } else sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); }
SDHCI has separate controls for the internal clock and enabling the clock signal to the card. The card clock signal was disabled via SDHCI_CLOCK_CARD_EN to avoid glitches on the clock line. It is not necessary to reset the internal clock to re-enable it. Instead re-enable by re-asserting SDHCI_CLOCK_CARD_EN. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- drivers/mmc/host/sdhci.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)