Commit f46b54cc authored by Renius Chen's avatar Renius Chen Committed by Ulf Hansson
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mmc: sdhci-pci-gli: Enable short circuit protection mechanism of GL9755 



Short circuit protection mechanism of GL9755 is disabled by HW default
setting. Enable short circuit protection to prevent GL9755 from being
damaged by short circuit or over current.

Signed-off-by: default avatarRenius Chen <reniuschengl@gmail.com>
Link: https://lore.kernel.org/r/20210225111307.62975-1-reniuschengl@gmail.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent f410ee0a

drivers/mmc/host/sdhci-pci-gli.c

+8 −0
Original line number Diff line number Diff line
@@ -123,6 +123,9 @@ 
#define PCI_GLI_9755_PLLSSC        0x68

#define   PCI_GLI_9755_PLLSSC_PPM    GENMASK(15, 0)



#define PCI_GLI_9755_SerDes  0x70

#define PCI_GLI_9755_SCP_DIS   BIT(19)



#define GLI_MAX_TUNING_LOOP 40



/* Genesys Logic chipset */
@@ -547,6 +550,11 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot) 
	value &= ~PCI_GLI_9755_DMACLK;

	pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value);



	/* enable short circuit protection */

	pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &value);

	value &= ~PCI_GLI_9755_SCP_DIS;

	pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value);



	gl9755_wt_off(pdev);

}