All of lore.kernel.org
 help / color / mirror / Atom feed
From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Jonathan Corbet <corbet@lwn.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Linus Walleij <linus.walleij@linaro.org>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-gpio@vger.kernel.org,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v3 4/8] drivers: platform: provide devm_platform_ioremap_resource_wc()
Date: Sun,  6 Oct 2019 07:39:12 +0200	[thread overview]
Message-ID: <20191006053916.8849-5-brgl@bgdev.pl> (raw)
In-Reply-To: <20191006053916.8849-1-brgl@bgdev.pl>

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Provide a write-combined variant of devm_platform_ioremap_resource().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../driver-api/driver-model/devres.rst        |  1 +
 drivers/base/platform.c                       | 19 ++++++++++++++++++-
 include/linux/platform_device.h               |  3 +++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index e605bb9df6e1..480b78ca3871 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -318,6 +318,7 @@ IOMAP
   devm_ioremap_resource() : checks resource, requests memory region, ioremaps
   devm_ioremap_resource_wc()
   devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device
+  devm_platform_ioremap_resource_wc()
   devm_iounmap()
   pcim_iomap()
   pcim_iomap_regions()	: do request_region() and iomap() on multiple BARs
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index b6c6c7d97d5b..d481b8a7d4fc 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -60,6 +60,7 @@ struct resource *platform_get_resource(struct platform_device *dev,
 }
 EXPORT_SYMBOL_GPL(platform_get_resource);
 
+#ifdef CONFIG_HAS_IOMEM
 /**
  * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
  *				    device
@@ -68,7 +69,6 @@ EXPORT_SYMBOL_GPL(platform_get_resource);
  *        resource management
  * @index: resource index
  */
-#ifdef CONFIG_HAS_IOMEM
 void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
 					     unsigned int index)
 {
@@ -78,6 +78,23 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
 	return devm_ioremap_resource(&pdev->dev, res);
 }
 EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
+
+/**
+ * devm_platform_ioremap_resource_wc - write-combined variant of
+ *                                     devm_platform_ioremap_resource()
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ *        resource management
+ * @index: resource index
+ */
+void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+						unsigned int index)
+{
+	struct resource *res;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, index);
+	return devm_ioremap_resource_wc(&pdev->dev, res);
+}
 #endif /* CONFIG_HAS_IOMEM */
 
 static int __platform_get_irq(struct platform_device *dev, unsigned int num)
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 1b5cec067533..83930790c701 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -57,6 +57,9 @@ platform_find_device_by_driver(struct device *start,
 extern void __iomem *
 devm_platform_ioremap_resource(struct platform_device *pdev,
 			       unsigned int index);
+extern void __iomem *
+devm_platform_ioremap_resource_wc(struct platform_device *pdev,
+				  unsigned int index);
 extern int platform_get_irq(struct platform_device *, unsigned int);
 extern int platform_get_irq_optional(struct platform_device *, unsigned int);
 extern int platform_irq_count(struct platform_device *);
-- 
2.23.0


  parent reply	other threads:[~2019-10-06  5:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-06  5:39 [PATCH v3 0/8] drivers: add new variants of devm_platform_ioremap_resource() Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 1/8] Documentation: devres: add missing entry for devm_platform_ioremap_resource() Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 2/8] lib: devres: prepare devm_ioremap_resource() for more variants Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 3/8] lib: devres: provide devm_ioremap_resource_wc() Bartosz Golaszewski
2019-10-06  5:39 ` Bartosz Golaszewski [this message]
2019-10-06  5:39 ` [PATCH v3 5/8] misc: sram: use devm_platform_ioremap_resource_wc() Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 6/8] drivers: provide devm_platform_ioremap_resource_byname() Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 7/8] gpio: mvebu: use devm_platform_ioremap_resource_byname() Bartosz Golaszewski
2019-10-06  5:39 ` [PATCH v3 8/8] gpio: tegra186: " Bartosz Golaszewski
2019-10-21 15:04 ` [PATCH v3 0/8] drivers: add new variants of devm_platform_ioremap_resource() Bartosz Golaszewski
2019-10-21 15:52   ` Arnd Bergmann
2019-10-21 16:29     ` Bartosz Golaszewski
2019-10-21 19:29       ` Arnd Bergmann
2019-10-30 21:35         ` Christoph Hellwig
2019-10-31  6:41           ` Bartosz Golaszewski
2019-10-31  8:12             ` Bartosz Golaszewski

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191006053916.8849-5-brgl@bgdev.pl \
    --to=brgl@bgdev.pl \
    --cc=arnd@arndb.de \
    --cc=bgolaszewski@baylibre.com \
    --cc=corbet@lwn.net \
    --cc=gregkh@linuxfoundation.org \
    --cc=linus.walleij@linaro.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-gpio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rafael@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.