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

benchuanggli · storulf · commit c4dedaaeb3f7 · 2024-10-28T12:30:27.000+01:00
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: 0e92aec ("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>
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
@@ -1068,6 +1068,9 @@ 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;

Original file line number	Diff line number	Diff line change
`@@ -1068,6 +1068,9 @@ static int gl9767_init_sd_express(struct mmc_host mmc, struct mmc_ios ios)`
`1068`	`1068`	`sdhci_writew(host, value, SDHCI_CLOCK_CONTROL);`
`1069`	`1069`	`}`
`1070`	`1070`
	`1071`	`+ pci_read_config_dword(pdev, PCIE_GLI_9767_CFG, &value);`
	`1072`	`+ value &= ~PCIE_GLI_9767_CFG_LOW_PWR_OFF;`
	`1073`	`+ pci_write_config_dword(pdev, PCIE_GLI_9767_CFG, value);`
`1071`	`1074`	`gl9767_vhs_read(pdev);`
`1072`	`1075`
`1073`	`1076`	`return 0;`