diff options
Diffstat (limited to 'drivers/ata/ahci_ceva.c')
| -rw-r--r-- | drivers/ata/ahci_ceva.c | 41 |
1 files changed, 38 insertions, 3 deletions
diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c index b10fd4c8c853..50b56cd0039d 100644 --- a/drivers/ata/ahci_ceva.c +++ b/drivers/ata/ahci_ceva.c @@ -12,6 +12,7 @@ #include <linux/module.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/reset.h> #include "ahci.h" /* Vendor Specific Register Offsets */ @@ -87,6 +88,7 @@ struct ceva_ahci_priv { u32 axicc; bool is_cci_enabled; int flags; + struct reset_control *rst; }; static unsigned int ceva_ahci_read_id(struct ata_device *dev, @@ -202,13 +204,46 @@ static int ceva_ahci_probe(struct platform_device *pdev) cevapriv->ahci_pdev = pdev; + cevapriv->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, + NULL); + if (IS_ERR(cevapriv->rst)) + dev_err_probe(&pdev->dev, PTR_ERR(cevapriv->rst), + "failed to get reset\n"); + hpriv = ahci_platform_get_resources(pdev, 0); if (IS_ERR(hpriv)) return PTR_ERR(hpriv); - rc = ahci_platform_enable_resources(hpriv); - if (rc) - return rc; + if (!cevapriv->rst) { + rc = ahci_platform_enable_resources(hpriv); + if (rc) + return rc; + } else { + int i; + + rc = ahci_platform_enable_clks(hpriv); + if (rc) + return rc; + /* Assert the controller reset */ + reset_control_assert(cevapriv->rst); + + for (i = 0; i < hpriv->nports; i++) { + rc = phy_init(hpriv->phys[i]); + if (rc) + return rc; + } + + /* De-assert the controller reset */ + reset_control_deassert(cevapriv->rst); + + for (i = 0; i < hpriv->nports; i++) { + rc = phy_power_on(hpriv->phys[i]); + if (rc) { + phy_exit(hpriv->phys[i]); + return rc; + } + } + } if (of_property_read_bool(np, "ceva,broken-gen2")) cevapriv->flags = CEVA_FLAG_BROKEN_GEN2; |