mmc: sdhci-pci-gli: GL9767: Fix low power mode in the SD Express process

commit c4dedaaeb3f78d3718e9c1b1e4d972a6b99073cd upstream.

When starting the SD Express process, the low power negotiation mode will
be disabled, so we need to re-enable it after switching back to SD mode.

Fixes: 0e92aec2efa0 ("mmc: sdhci-pci-gli: Add support SD Express card for GL9767")
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Cc: stable@vger.kernel.org
Message-ID: <20241025060017.1663697-2-benchuanggli@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 4c89ecd22ea1eb035e625e9d90e725d85c40590c..11c404374d79da2a1842488ab59ff182349457d7 100644 (file)
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -1078,6 +1078,9 @@ static int gl9767_init_sd_express(struct mmc_host *mmc, struct mmc_ios *ios)
                sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);
        }
 
+       pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);
+       value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF;
+       pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);
        gl9767_vhs_read(pdev);
 
        return 0;