From: pierre Kuo <vichy.kuo@gmail.com>
To: gregkh@linuxfoundation.org, rafael@kernel.org
Cc: linux-kernel@vger.kernel.org, pierre Kuo <vichy.kuo@gmail.com>
Subject: [PATCH 2/2] driver core: platform: provide devm_platform_iounremap_resource
Date: Sun, 20 Sep 2020 19:38:08 +0800 [thread overview]
Message-ID: <20200920113808.22223-2-vichy.kuo@gmail.com> (raw)
In-Reply-To: <20200920113808.22223-1-vichy.kuo@gmail.com>
Combine platform_get_resource() and devm_iounremap_resource() to release
the iomem allocated by devm_platform_get_and_ioremap_resource().
Signed-off-by: pierre Kuo <vichy.kuo@gmail.com>
---
drivers/base/platform.c | 24 ++++++++++++++++++++++++
include/linux/platform_device.h | 4 ++++
2 files changed, 28 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index e5d8a0503b4f..e2655c00873f 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -84,6 +84,30 @@ devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
}
EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);
+/**
+ * devm_platform_iounremap_resource - call devm_iounremap_resource() for a
+ * platform device with memory that addr points to.
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @index: resource index
+ * @addr: address to be unmap.
+ */
+void
+devm_platform_iounremap_resource(struct platform_device *pdev,
+ unsigned int index, void __iomem *addr)
+{
+ struct resource *r;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ if (!r)
+ dev_err(&pdev->dev,
+ "MEM resource index %d not found\n", index);
+ else
+ devm_iounremap_resource(&pdev->dev, r, addr);
+}
+EXPORT_SYMBOL_GPL(devm_platform_iounremap_resource);
+
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 77a2aada106d..75da15937679 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -67,6 +67,10 @@ devm_platform_ioremap_resource_wc(struct platform_device *pdev,
extern void __iomem *
devm_platform_ioremap_resource_byname(struct platform_device *pdev,
const char *name);
+extern void
+devm_platform_iounremap_resource(struct platform_device *pdev,
+ unsigned int index,
+ void __iomem *addr);
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 *);
--
2.17.1
next prev parent reply other threads:[~2020-09-20 11:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-20 11:38 [PATCH 1/2] lib: devres: provide devm_iounremap_resource() pierre Kuo
2020-09-20 11:38 ` pierre Kuo [this message]
2020-09-29 6:21 ` [PATCH 2/2] driver core: platform: provide devm_platform_iounremap_resource pierre kuo
2020-10-02 13:45 ` Greg KH
2020-10-04 16:21 ` pierre kuo
2020-10-04 16:47 ` Greg KH
2020-10-05 15:23 ` pierre kuo
2020-10-05 15:31 ` Greg KH
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=20200920113808.22223-2-vichy.kuo@gmail.com \
--to=vichy.kuo@gmail.com \
--cc=gregkh@linuxfoundation.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).