scsi: ufs-cdns: Add support for UFSHCI with M31 PHY
This patch adds an additional PHY initialization, required for M31 PHY when used with Cadence UFS HC. A new compatible string has been added for this purpose. [mkp: nuke superfluous status return] Signed-off-by: Jan Kotas <jank@cadence.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -17,7 +17,8 @@
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#include "ufshcd-pltfrm.h"
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#include "ufshcd-pltfrm.h"
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#define CDNS_UFS_REG_HCLKDIV 0xFC
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#define CDNS_UFS_REG_HCLKDIV 0xFC
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#define CDNS_UFS_REG_PHY_XCFGD1 0x113C
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/**
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/**
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* Sets HCLKDIV register value based on the core_clk
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* Sets HCLKDIV register value based on the core_clk
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@ -77,11 +78,66 @@ static int cdns_ufs_setup_clocks(struct ufs_hba *hba, bool on,
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return cdns_ufs_set_hclkdiv(hba);
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return cdns_ufs_set_hclkdiv(hba);
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}
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}
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static struct ufs_hba_variant_ops cdns_pltfm_hba_vops = {
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/**
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* cdns_ufs_init - performs additional ufs initialization
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* @hba: host controller instance
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*
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* Returns status of initialization
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*/
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static int cdns_ufs_init(struct ufs_hba *hba)
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{
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int status = 0;
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if (hba->vops && hba->vops->phy_initialization)
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status = hba->vops->phy_initialization(hba);
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return status;
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}
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/**
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* cdns_ufs_m31_16nm_phy_initialization - performs m31 phy initialization
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* @hba: host controller instance
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*
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* Always returns 0
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*/
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static int cdns_ufs_m31_16nm_phy_initialization(struct ufs_hba *hba)
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{
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u32 data;
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/* Increase RX_Advanced_Min_ActivateTime_Capability */
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data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1);
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data |= BIT(24);
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ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1);
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return 0;
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}
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static const struct ufs_hba_variant_ops cdns_ufs_pltfm_hba_vops = {
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.name = "cdns-ufs-pltfm",
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.name = "cdns-ufs-pltfm",
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.setup_clocks = cdns_ufs_setup_clocks,
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.setup_clocks = cdns_ufs_setup_clocks,
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};
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};
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static const struct ufs_hba_variant_ops cdns_ufs_m31_16nm_pltfm_hba_vops = {
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.name = "cdns-ufs-pltfm",
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.init = cdns_ufs_init,
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.setup_clocks = cdns_ufs_setup_clocks,
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.phy_initialization = cdns_ufs_m31_16nm_phy_initialization,
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};
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static const struct of_device_id cdns_ufs_of_match[] = {
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{
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.compatible = "cdns,ufshc",
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.data = &cdns_ufs_pltfm_hba_vops,
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},
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{
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.compatible = "cdns,ufshc-m31-16nm",
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.data = &cdns_ufs_m31_16nm_pltfm_hba_vops,
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},
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{ },
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};
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MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);
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/**
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/**
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* cdns_ufs_pltfrm_probe - probe routine of the driver
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* cdns_ufs_pltfrm_probe - probe routine of the driver
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* @pdev: pointer to platform device handle
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* @pdev: pointer to platform device handle
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@ -91,10 +147,15 @@ static struct ufs_hba_variant_ops cdns_pltfm_hba_vops = {
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static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
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static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
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{
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{
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int err;
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int err;
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const struct of_device_id *of_id;
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struct ufs_hba_variant_ops *vops;
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struct device *dev = &pdev->dev;
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struct device *dev = &pdev->dev;
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of_id = of_match_node(cdns_ufs_of_match, dev->of_node);
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vops = (struct ufs_hba_variant_ops *)of_id->data;
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/* Perform generic probe */
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/* Perform generic probe */
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err = ufshcd_pltfrm_init(pdev, &cdns_pltfm_hba_vops);
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err = ufshcd_pltfrm_init(pdev, vops);
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if (err)
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if (err)
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dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
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dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
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@ -115,13 +176,6 @@ static int cdns_ufs_pltfrm_remove(struct platform_device *pdev)
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return 0;
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return 0;
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}
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}
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static const struct of_device_id cdns_ufs_of_match[] = {
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{ .compatible = "cdns,ufshc" },
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{},
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};
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MODULE_DEVICE_TABLE(of, cdns_ufs_of_match);
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static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
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static const struct dev_pm_ops cdns_ufs_dev_pm_ops = {
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.suspend = ufshcd_pltfrm_suspend,
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.suspend = ufshcd_pltfrm_suspend,
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.resume = ufshcd_pltfrm_resume,
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.resume = ufshcd_pltfrm_resume,
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