[PATCH] mmc: sdhci-pci-gli: Add Genesys Logic GL9768 support

[Ben Chuang]

From: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>

The GL9768 is the successor to the GL9767 and uses a compatible
register layout. Reuse the GL9767 driver for the GL9768 by adding
the GL9768 PCI device ID to the device ID table.

Clear bits 2 and 3 in the SD Express control register at offset
0x940 when the driver initializes the device. This clears both
bits to zero, matching the GL9767 default configuration.

Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
---
 drivers/mmc/host/sdhci-pci-core.c | 1 +
 drivers/mmc/host/sdhci-pci-gli.c  | 7 +++++++
 drivers/mmc/host/sdhci-pci.h      | 1 +
 3 files changed, 9 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index a9000f3bd419..db0417238131 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -1959,6 +1959,7 @@ static const struct pci_device_id pci_ids[] = {
 	SDHCI_PCI_DEVICE(GLI, 9755, gl9755),
 	SDHCI_PCI_DEVICE(GLI, 9763E, gl9763e),
 	SDHCI_PCI_DEVICE(GLI, 9767, gl9767),
+	SDHCI_PCI_DEVICE(GLI, 9768, gl9767),
 	SDHCI_PCI_DEVICE_CLASS(AMD, SYSTEM_SDHCI, PCI_CLASS_MASK, amd),
 	/* Generic SD host controller */
 	{PCI_DEVICE_CLASS(SYSTEM_SDHCI, PCI_CLASS_MASK)},
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index b55618566d65..66452ed8cd8a 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -245,6 +245,8 @@
 #define PCIE_GLI_9767_SD_EXPRESS_CTL			0x940
 #define   PCIE_GLI_9767_SD_EXPRESS_CTL_SDEI_EXE		  BIT(0)
 #define   PCIE_GLI_9767_SD_EXPRESS_CTL_SD_EXPRESS_MODE	  BIT(1)
+#define   PCIE_GLI_9767_SD_EXPRESS_CTL_DETECT_1		  BIT(2)
+#define   PCIE_GLI_9767_SD_EXPRESS_CTL_DETECT_2		  BIT(3)
 
 #define PCIE_GLI_9767_SD_DATA_MULTI_CTL				0x944
 #define   PCIE_GLI_9767_SD_DATA_MULTI_CTL_SELECT_UHS2		  BIT(5)
@@ -1354,6 +1356,11 @@ static void gl9767_hw_setting(struct sdhci_pci_slot *slot)
 		 PCIE_GLI_9767_SCR_CORE_PWR_D3_OFF;
 	pci_write_config_dword(pdev, PCIE_GLI_9767_SCR, value);
 
+	pci_read_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, &value);
+	value &= ~(PCIE_GLI_9767_SD_EXPRESS_CTL_DETECT_1 |
+		   PCIE_GLI_9767_SD_EXPRESS_CTL_DETECT_2);
+	pci_write_config_dword(pdev, PCIE_GLI_9767_SD_EXPRESS_CTL, value);
+
 	gl9767_vhs_read(pdev);
 }
 
diff --git a/drivers/mmc/host/sdhci-pci.h b/drivers/mmc/host/sdhci-pci.h
index f38f0bd4165c..bcae29f8d8da 100644
--- a/drivers/mmc/host/sdhci-pci.h
+++ b/drivers/mmc/host/sdhci-pci.h
@@ -81,6 +81,7 @@
 #define PCI_DEVICE_ID_GLI_9750		0x9750
 #define PCI_DEVICE_ID_GLI_9763E		0xe763
 #define PCI_DEVICE_ID_GLI_9767		0x9767
+#define PCI_DEVICE_ID_GLI_9768		0x9768
 
 /*
  * PCI device class and mask

base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.56.0