From 2d0736c7b363c96f24929f136834b99fc95a9450 Mon Sep 17 00:00:00 2001 From: Nitin Rawat Date: Tue, 17 Mar 2020 18:09:41 +0530 Subject: [PATCH] scsi: ufs: Read device tree to find UFS's Vccq2 voltage level This change allows selecting the UFS Vccq2 voltage level by setting the UFS's entry vccq2-voltage-level in the device tree. If UFS's Vccq2 voltage level setting is not found in the device tree, use default values provided by the driver. Change-Id: Ibe9223e717e63b9edde95b272aaf142e7cf81672 Signed-off-by: Nitin Rawat --- drivers/scsi/ufs/ufshcd-pltfrm.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c index c91023e57194..e6f38c6b89f3 100644 --- a/drivers/scsi/ufs/ufshcd-pltfrm.c +++ b/drivers/scsi/ufs/ufshcd-pltfrm.c @@ -178,8 +178,21 @@ static int ufshcd_populate_vreg(struct device *dev, const char *name, vreg->min_uV = UFS_VREG_VCCQ_MIN_UV; vreg->max_uV = UFS_VREG_VCCQ_MAX_UV; } else if (!strcmp(name, "vccq2")) { +#if defined(CONFIG_SCSI_UFSHCD_QTI) + prop = of_get_property(np, "vccq2-voltage-level", &len); + if (!prop || (len != (2 * sizeof(__be32)))) { + dev_warn(dev, "%s vccq2-voltage-level property.\n", + prop ? "invalid format" : "no"); + vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV; + vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV; + } else { + vreg->min_uV = be32_to_cpup(&prop[0]); + vreg->max_uV = be32_to_cpup(&prop[1]); + } +#else vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV; vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV; +#endif } goto out;