Re: [PATCH 01/14] ata: ahci-platform: add reset control support and the flag to specify using reset

From: Sergei Shtylyov
Date: Wed Aug 22 2018 - 05:34:36 EST


On 8/22/2018 10:36 AM, Kunihiko Hayashi wrote:

Add support to get and control a list of resets for the device
as optional and shared. These resets must be kept de-asserted until
the device is enabled.

This is specified as shared because some SoCs like UniPhier series
have common reset controls with all ahci controller instances.

However, according to Thierry's view,
some hardware-specific drivers already use their own resets,
and the common reset make a path to occur double controls of resets.

Now this add the flag to ahci_platform_get_resources() indicating
whether to use the resources, currently resets only, and existing
drivers set 0 to this flags.

Suggested-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>

diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index 1b0a17b..eaedca5f 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -30,7 +30,7 @@ void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv);
int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
struct ahci_host_priv *ahci_platform_get_resources(
- struct platform_device *pdev);
+ struct platform_device *pdev, unsigned int flags);

That breaks all the users of this API. You should fix the callers in this same patch to avoid breakage.


MBR, Sergei