diff options
| author | Yaniv Gardi <ygardi@codeaurora.org> | 2016-03-10 16:37:05 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-03-15 02:04:45 +0100 |
| commit | 54b879b76ea253105505f840bd842c1927c9e380 (patch) | |
| tree | d0caf219520b92c99979ed7558d40099a97cfe4e /drivers/scsi/ufs/ufshcd-pltfrm.c | |
| parent | sg: fix dxferp in from_to case (diff) | |
| download | linux-54b879b76ea253105505f840bd842c1927c9e380.tar.xz linux-54b879b76ea253105505f840bd842c1927c9e380.zip | |
scsi: ufs-qcom: add number of lanes per direction
Different platform may have different number of lanes
for the UFS link.
Add parameter to device tree specifying how many lanes
should be configured for the UFS link.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd-pltfrm.c')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd-pltfrm.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c index d2a7b127b05c..718f12e09885 100644 --- a/drivers/scsi/ufs/ufshcd-pltfrm.c +++ b/drivers/scsi/ufs/ufshcd-pltfrm.c @@ -40,6 +40,8 @@ #include "ufshcd.h" #include "ufshcd-pltfrm.h" +#define UFSHCD_DEFAULT_LANES_PER_DIRECTION 2 + static int ufshcd_parse_clock_info(struct ufs_hba *hba) { int ret = 0; @@ -277,6 +279,21 @@ void ufshcd_pltfrm_shutdown(struct platform_device *pdev) } EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown); +static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba) +{ + struct device *dev = hba->dev; + int ret; + + ret = of_property_read_u32(dev->of_node, "lanes-per-direction", + &hba->lanes_per_direction); + if (ret) { + dev_dbg(hba->dev, + "%s: failed to read lanes-per-direction, ret=%d\n", + __func__, ret); + hba->lanes_per_direction = UFSHCD_DEFAULT_LANES_PER_DIRECTION; + } +} + /** * ufshcd_pltfrm_init - probe routine of the driver * @pdev: pointer to Platform device handle @@ -331,6 +348,8 @@ int ufshcd_pltfrm_init(struct platform_device *pdev, pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); + ufshcd_init_lanes_per_dir(hba); + err = ufshcd_init(hba, mmio_base, irq); if (err) { dev_err(dev, "Initialization failed\n"); |