diff options
Diffstat (limited to 'drivers/ata/libahci_platform.c')
| -rw-r--r-- | drivers/ata/libahci_platform.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c index 341d0ef82cbd..46a762442dc5 100644 --- a/drivers/ata/libahci_platform.c +++ b/drivers/ata/libahci_platform.c @@ -25,6 +25,7 @@ #include <linux/phy/phy.h> #include <linux/pm_runtime.h> #include <linux/of_platform.h> +#include <linux/reset.h> #include "ahci.h" static void ahci_host_stop(struct ata_host *host); @@ -195,7 +196,8 @@ EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators); * following order: * 1) Regulator * 2) Clocks (through ahci_platform_enable_clks) - * 3) Phys + * 3) Resets + * 4) Phys * * If resource enabling fails at any point the previous enabled resources * are disabled in reverse order. @@ -215,12 +217,19 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv) if (rc) goto disable_regulator; - rc = ahci_platform_enable_phys(hpriv); + rc = reset_control_deassert(hpriv->rsts); if (rc) goto disable_clks; + rc = ahci_platform_enable_phys(hpriv); + if (rc) + goto disable_resets; + return 0; +disable_resets: + reset_control_assert(hpriv->rsts); + disable_clks: ahci_platform_disable_clks(hpriv); @@ -239,12 +248,15 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_resources); * following order: * 1) Phys * 2) Clocks (through ahci_platform_disable_clks) - * 3) Regulator + * 3) Resets + * 4) Regulator */ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv) { ahci_platform_disable_phys(hpriv); + reset_control_assert(hpriv->rsts); + ahci_platform_disable_clks(hpriv); ahci_platform_disable_regulators(hpriv); @@ -340,7 +352,7 @@ static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port, * 2) regulator for controlling the targets power (optional) * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node, * or for non devicetree enabled platforms a single clock - * 4) phys (optional) + * 4) phys (optional) * * RETURNS: * The allocated ahci_host_priv on success, otherwise an ERR_PTR value @@ -393,6 +405,12 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev) hpriv->clks[i] = clk; } + hpriv->rsts = devm_reset_control_array_get_optional_shared(dev); + if (IS_ERR(hpriv->rsts)) { + rc = PTR_ERR(hpriv->rsts); + goto err_out; + } + hpriv->nports = child_nodes = of_get_child_count(dev->of_node); /* |