Commit 82d437e6 authored by Serge Semin's avatar Serge Semin Committed by Damien Le Moal

ata: libahci_platform: Convert to using platform devm-ioremap methods

Currently the IOMEM AHCI registers space is mapped by means of the
two functions invocation: platform_get_resource() is used to get the very
first memory resource and devm_ioremap_resource() is called to remap that
resource. Device-managed kernel API provides a handy wrapper to perform
the same in single function call: devm_platform_ioremap_resource().

While at it seeing many AHCI platform drivers rely on having the AHCI CSR
space marked with "ahci" name let's first try to find and remap the CSR
IO-mem with that name and only if it fails fallback to getting the very
first registers space platform resource.
Signed-off-by: default avatarSerge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarDamien Le Moal <damien.lemoal@opensource.wdc.com>
parent 2ea4d52a
...@@ -402,8 +402,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev, ...@@ -402,8 +402,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
devres_add(dev, hpriv); devres_add(dev, hpriv);
hpriv->mmio = devm_ioremap_resource(dev, /*
platform_get_resource(pdev, IORESOURCE_MEM, 0)); * If the DT provided an "ahci" named resource, use it. Otherwise,
* fallback to using the default first resource for the device node.
*/
if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahci"))
hpriv->mmio = devm_platform_ioremap_resource_byname(pdev, "ahci");
else
hpriv->mmio = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hpriv->mmio)) { if (IS_ERR(hpriv->mmio)) {
rc = PTR_ERR(hpriv->mmio); rc = PTR_ERR(hpriv->mmio);
goto err_out; goto err_out;
......
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