Commit c1f300ea authored Nov 02, 2016 by Venkat Gopalakrishnan Committed by Subhash Jadavani Nov 24, 2016

scsi: ufs: perform full reset at initialization



The phy initialization sequence assumes a POR state but
the bootloaders can leave PHY at an already initialized
state, hence there could potentially be issues with the
initialization from ufs driver. Perform a full reset to
start from a power on reset state. Also a reset is
required by the UFS hardware programming guide.

Change-Id: I0118b0d3013166aeec0bb0bc0ef181e48998e758
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>

parent 6a714c1b

drivers/scsi/ufs/ufshcd.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -9419,6 +9419,9 @@ int ufshcd_init(struct ufs_hba hba, void __iomem mmio_base, unsigned int irq)
		goto exit_gating;
		}

		/* Reset controller to power on reset (POR) state */
		ufshcd_vops_full_reset(hba);

		/* Host controller enable */
		err = ufshcd_hba_enable(hba);
		if (err) {