From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
To: Damien Le Moal <damien.lemoal@opensource.wdc.com>,
Hans de Goede <hdegoede@redhat.com>, Jens Axboe <axboe@kernel.dk>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Serge Semin <fancer.lancer@gmail.com>,
Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
Rob Herring <robh+dt@kernel.org>, <linux-ide@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>
Subject: [PATCH v3 06/23] ata: libahci_platform: Convert to using platform devm-ioremap methods
Date: Thu, 12 May 2022 02:17:53 +0300 [thread overview]
Message-ID: <20220511231810.4928-7-Sergey.Semin@baikalelectronics.ru> (raw)
In-Reply-To: <20220511231810.4928-1-Sergey.Semin@baikalelectronics.ru>
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: Serge Semin <Sergey.Semin@baikalelectronics.ru>
---
Changelog v2:
- Check whether there is "ahhi" reg resource before using the
devm_platform_ioremap_resource_byname() method in order to prevent a
false error message printed in the log (@Damien)
- Slightly update the patch title due to the change above and to be more
specific that the platform device managed methods are utilized.
---
drivers/ata/libahci_platform.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index f7f9bfcfc164..8c9fbcc3043b 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -404,8 +404,14 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
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)) {
rc = PTR_ERR(hpriv->mmio);
goto err_out;
--
2.35.1
next prev parent reply other threads:[~2022-05-11 23:18 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-11 23:17 [PATCH v3 00/23] ata: ahci: Add DWC/Baikal-T1 AHCI SATA support Serge Semin
2022-05-11 23:17 ` [PATCH v3 01/23] dt-bindings: ata: ahci-platform: Drop dma-coherent property declaration Serge Semin
2022-05-12 6:14 ` Hannes Reinecke
2022-05-17 18:58 ` Rob Herring
2022-05-21 9:22 ` Serge Semin
2022-05-24 14:57 ` Rob Herring
2022-05-25 10:01 ` Serge Semin
2022-05-11 23:17 ` [PATCH v3 02/23] dt-bindings: ata: ahci-platform: Detach common AHCI bindings Serge Semin
2022-05-12 6:19 ` Hannes Reinecke
2022-05-12 11:51 ` Serge Semin
2022-05-17 19:10 ` Rob Herring
2022-05-22 15:02 ` Serge Semin
2022-05-24 15:19 ` Rob Herring
2022-05-27 10:10 ` Serge Semin
2022-06-01 0:51 ` Rob Herring
2022-05-11 23:17 ` [PATCH v3 03/23] dt-bindings: ata: ahci-platform: Clarify common AHCI props constraints Serge Semin
2022-05-12 6:21 ` Hannes Reinecke
2022-05-12 12:01 ` Serge Semin
2022-05-12 8:11 ` Sergei Shtylyov
2022-05-12 12:04 ` Serge Semin
2022-05-17 19:14 ` Rob Herring
2022-05-22 15:08 ` Serge Semin
2022-05-11 23:17 ` [PATCH v3 04/23] dt-bindings: ata: sata: Extend number of SATA ports Serge Semin
2022-05-12 6:23 ` Hannes Reinecke
2022-05-17 19:15 ` Rob Herring
2022-05-11 23:17 ` [PATCH v3 05/23] ata: libahci_platform: Explicitly set rc on devres_alloc failure Serge Semin
2022-05-12 6:27 ` Hannes Reinecke
2022-05-12 10:32 ` Damien Le Moal
2022-05-12 12:31 ` Serge Semin
2022-05-11 23:17 ` Serge Semin [this message]
2022-05-12 6:31 ` [PATCH v3 06/23] ata: libahci_platform: Convert to using platform devm-ioremap methods Hannes Reinecke
2022-05-11 23:17 ` [PATCH v3 07/23] ata: libahci_platform: Convert to using devm bulk clocks API Serge Semin
2022-05-12 6:31 ` Hannes Reinecke
2022-05-12 18:32 ` kernel test robot
2022-05-11 23:17 ` [PATCH v3 08/23] ata: libahci_platform: Add function returning a clock-handle by id Serge Semin
2022-05-12 6:32 ` Hannes Reinecke
2022-05-12 14:26 ` Serge Semin
2022-05-13 9:32 ` Damien Le Moal
2022-05-13 13:31 ` Serge Semin
2022-05-11 23:17 ` [PATCH v3 09/23] ata: libahci_platform: Sanity check the DT child nodes number Serge Semin
2022-05-12 6:34 ` Hannes Reinecke
2022-05-12 8:24 ` Sergei Shtylyov
2022-05-12 14:40 ` Serge Semin
2022-05-11 23:17 ` [PATCH v3 10/23] ata: libahci_platform: Parse ports-implemented property in resources getter Serge Semin
2022-05-12 6:48 ` Hannes Reinecke
2022-05-12 14:31 ` Serge Semin
2022-05-11 23:17 ` [PATCH v3 11/23] ata: libahci_platform: Introduce reset assertion/deassertion methods Serge Semin
2022-05-12 6:54 ` Hannes Reinecke
2022-05-11 23:17 ` [PATCH v3 12/23] dt-bindings: ata: ahci: Add platform capability properties Serge Semin
2022-05-12 6:56 ` Hannes Reinecke
2022-05-17 19:20 ` Rob Herring
2022-05-22 17:43 ` Serge Semin
2022-05-11 23:18 ` [PATCH v3 13/23] ata: libahci: Extend port-cmd flags set with port capabilities Serge Semin
2022-05-12 6:57 ` Hannes Reinecke
2022-05-12 15:05 ` Serge Semin
2022-05-13 8:22 ` Sergei Shtylyov
2022-05-13 12:13 ` Serge Semin
2022-05-11 23:18 ` [PATCH v3 14/23] ata: libahci: Discard redundant force_port_map parameter Serge Semin
2022-05-12 7:00 ` Hannes Reinecke
2022-05-11 23:18 ` [PATCH v3 15/23] ata: libahci: Don't read AHCI version twice in the save-config method Serge Semin
2022-05-12 7:00 ` Hannes Reinecke
2022-05-11 23:18 ` [PATCH v3 16/23] ata: ahci: Convert __ahci_port_base to accepting hpriv as arguments Serge Semin
2022-05-12 7:08 ` Hannes Reinecke
2022-05-11 23:18 ` [PATCH v3 17/23] ata: ahci: Introduce firmware-specific caps initialization Serge Semin
2022-05-12 7:05 ` Hannes Reinecke
2022-05-12 15:54 ` Serge Semin
2022-05-11 23:18 ` [PATCH v3 18/23] dt-bindings: ata: ahci: Add DWC AHCI SATA controller DT schema Serge Semin
2022-05-12 7:08 ` Hannes Reinecke
2022-05-17 20:04 ` Rob Herring
2022-05-22 17:51 ` Serge Semin
2022-05-11 23:18 ` [PATCH v3 19/23] ata: ahci: Add DWC AHCI SATA controller support Serge Semin
2022-05-12 7:09 ` Hannes Reinecke
2022-05-11 23:18 ` [PATCH v3 20/23] dt-bindings: ata: ahci: Add Baikal-T1 AHCI SATA controller DT schema Serge Semin
2022-05-12 7:10 ` Hannes Reinecke
2022-05-17 20:13 ` Rob Herring
2022-05-22 20:49 ` Serge Semin
2022-05-24 15:33 ` Rob Herring
2022-05-27 10:55 ` Serge Semin
2022-05-11 23:18 ` [PATCH v3 21/23] ata: ahci-dwc: Add platform-specific quirks support Serge Semin
2022-05-12 7:12 ` Hannes Reinecke
2022-05-12 16:29 ` Serge Semin
2022-05-14 0:30 ` kernel test robot
2022-05-11 23:18 ` [PATCH v3 22/23] ata: ahci-dwc: Add Baikal-T1 AHCI SATA interface support Serge Semin
2022-05-12 7:13 ` Hannes Reinecke
2022-05-11 23:18 ` [PATCH v3 23/23] MAINTAINERS: Add maintainers for DWC AHCI SATA driver Serge Semin
2022-05-12 7:16 ` Hannes Reinecke
2022-05-12 16:47 ` Serge Semin
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