* [PATCH v2 0/2] drivers: new helper for ioremapping memory resources
@ 2019-02-20 11:12 Bartosz Golaszewski
2019-02-20 11:12 ` [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource() Bartosz Golaszewski
` (2 more replies)
0 siblings, 3 replies; 9+ messages in thread
From: Bartosz Golaszewski @ 2019-02-20 11:12 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rafael J . Wysocki, Keerthy, Linus Walleij,
Andy Shevchenko
Cc: linux-kernel, linux-gpio, Bartosz Golaszewski
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
There are currently 1200+ instances of using platform_get_resource()
and devm_ioremap_resource() together in the kernel tree. It's a minor
redundancy, but consolidation is always good.
The first patch in this series adds a wrapper for these two calls and
the second uses it in a driver I could test.
If accepted I'll prepare a coccinelle script that'll make it easier
to convert all users.
v1 -> v2:
- EXPORT_SYMBOL() -> EXPORT_SYMBOL_GPL()
Bartosz Golaszewski (2):
drivers: provide devm_platform_ioremap_resource()
gpio: davinci: use devm_platform_ioremap_resource()
drivers/base/platform.c | 18 ++++++++++++++++++
drivers/gpio/gpio-davinci.c | 4 +---
include/linux/platform_device.h | 3 +++
3 files changed, 22 insertions(+), 3 deletions(-)
--
2.20.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-20 11:12 [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Bartosz Golaszewski
@ 2019-02-20 11:12 ` Bartosz Golaszewski
2019-02-20 11:16 ` Greg Kroah-Hartman
2019-02-20 11:12 ` [PATCH v2 2/2] gpio: davinci: use devm_platform_ioremap_resource() Bartosz Golaszewski
2019-02-20 12:04 ` [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Andy Shevchenko
2 siblings, 1 reply; 9+ messages in thread
From: Bartosz Golaszewski @ 2019-02-20 11:12 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rafael J . Wysocki, Keerthy, Linus Walleij,
Andy Shevchenko
Cc: linux-kernel, linux-gpio, Bartosz Golaszewski
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
There are currently 1200+ instances of using platform_get_resource()
and devm_ioremap_resource() together in the kernel tree.
This patch wraps these two calls in a single helper. Thanks to that
we don't have to declare a local variable for struct resource * and can
omit the redundant argument for resource type. We also have one
function call less.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/base/platform.c | 18 ++++++++++++++++++
include/linux/platform_device.h | 3 +++
2 files changed, 21 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1c958eb33ef4..f82691e1c26c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -79,6 +79,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource);
+/**
+ * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
+ * device
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource managemend
+ * @index: resource index
+ */
+void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
+ unsigned int index)
+{
+ struct resource *res;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ return devm_ioremap_resource(&pdev->dev, res);
+}
+EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
+
/**
* platform_get_irq - get an IRQ for a device
* @dev: platform device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index c7c081dc6034..b126b73ed8ef 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -52,6 +52,9 @@ extern struct device platform_bus;
extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
+extern void __iomem *
+devm_platform_ioremap_resource(struct platform_device *pdev,
+ unsigned int index);
extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *);
extern struct resource *platform_get_resource_byname(struct platform_device *,
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v2 2/2] gpio: davinci: use devm_platform_ioremap_resource()
2019-02-20 11:12 [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Bartosz Golaszewski
2019-02-20 11:12 ` [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource() Bartosz Golaszewski
@ 2019-02-20 11:12 ` Bartosz Golaszewski
2019-02-20 12:04 ` [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Andy Shevchenko
2 siblings, 0 replies; 9+ messages in thread
From: Bartosz Golaszewski @ 2019-02-20 11:12 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rafael J . Wysocki, Keerthy, Linus Walleij,
Andy Shevchenko
Cc: linux-kernel, linux-gpio, Bartosz Golaszewski
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Use the new helper that wraps the calls to platform_get_resource() and
devm_ioremap_resource() together.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
drivers/gpio/gpio-davinci.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c
index bdb29e51b417..188b8e5c8e67 100644
--- a/drivers/gpio/gpio-davinci.c
+++ b/drivers/gpio/gpio-davinci.c
@@ -198,7 +198,6 @@ static int davinci_gpio_probe(struct platform_device *pdev)
struct davinci_gpio_controller *chips;
struct davinci_gpio_platform_data *pdata;
struct device *dev = &pdev->dev;
- struct resource *res;
pdata = davinci_gpio_get_pdata(pdev);
if (!pdata) {
@@ -236,8 +235,7 @@ static int davinci_gpio_probe(struct platform_device *pdev)
if (!chips)
return -ENOMEM;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- gpio_base = devm_ioremap_resource(dev, res);
+ gpio_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(gpio_base))
return PTR_ERR(gpio_base);
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-20 11:12 ` [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource() Bartosz Golaszewski
@ 2019-02-20 11:16 ` Greg Kroah-Hartman
2019-02-20 11:21 ` Bartosz Golaszewski
0 siblings, 1 reply; 9+ messages in thread
From: Greg Kroah-Hartman @ 2019-02-20 11:16 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Rafael J . Wysocki, Keerthy, Linus Walleij, Andy Shevchenko,
linux-kernel, linux-gpio, Bartosz Golaszewski
On Wed, Feb 20, 2019 at 12:12:39PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> There are currently 1200+ instances of using platform_get_resource()
> and devm_ioremap_resource() together in the kernel tree.
>
> This patch wraps these two calls in a single helper. Thanks to that
> we don't have to declare a local variable for struct resource * and can
> omit the redundant argument for resource type. We also have one
> function call less.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-20 11:16 ` Greg Kroah-Hartman
@ 2019-02-20 11:21 ` Bartosz Golaszewski
2019-02-20 12:15 ` Greg Kroah-Hartman
0 siblings, 1 reply; 9+ messages in thread
From: Bartosz Golaszewski @ 2019-02-20 11:21 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Rafael J . Wysocki, Keerthy, Linus Walleij, Andy Shevchenko,
Linux Kernel Mailing List, open list:GPIO SUBSYSTEM,
Bartosz Golaszewski
śr., 20 lut 2019 o 12:16 Greg Kroah-Hartman
<gregkh@linuxfoundation.org> napisał(a):
>
> On Wed, Feb 20, 2019 at 12:12:39PM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> >
> > There are currently 1200+ instances of using platform_get_resource()
> > and devm_ioremap_resource() together in the kernel tree.
> >
> > This patch wraps these two calls in a single helper. Thanks to that
> > we don't have to declare a local variable for struct resource * and can
> > omit the redundant argument for resource type. We also have one
> > function call less.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>
Should this go through the driver-core tree?
Bart
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 0/2] drivers: new helper for ioremapping memory resources
2019-02-20 11:12 [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Bartosz Golaszewski
2019-02-20 11:12 ` [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource() Bartosz Golaszewski
2019-02-20 11:12 ` [PATCH v2 2/2] gpio: davinci: use devm_platform_ioremap_resource() Bartosz Golaszewski
@ 2019-02-20 12:04 ` Andy Shevchenko
2 siblings, 0 replies; 9+ messages in thread
From: Andy Shevchenko @ 2019-02-20 12:04 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Greg Kroah-Hartman, Rafael J . Wysocki, Keerthy, Linus Walleij,
linux-kernel, linux-gpio, Bartosz Golaszewski
On Wed, Feb 20, 2019 at 12:12:38PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> There are currently 1200+ instances of using platform_get_resource()
> and devm_ioremap_resource() together in the kernel tree. It's a minor
> redundancy, but consolidation is always good.
>
> The first patch in this series adds a wrapper for these two calls and
> the second uses it in a driver I could test.
>
> If accepted I'll prepare a coccinelle script that'll make it easier
> to convert all users.
>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> v1 -> v2:
> - EXPORT_SYMBOL() -> EXPORT_SYMBOL_GPL()
>
> Bartosz Golaszewski (2):
> drivers: provide devm_platform_ioremap_resource()
> gpio: davinci: use devm_platform_ioremap_resource()
>
> drivers/base/platform.c | 18 ++++++++++++++++++
> drivers/gpio/gpio-davinci.c | 4 +---
> include/linux/platform_device.h | 3 +++
> 3 files changed, 22 insertions(+), 3 deletions(-)
>
> --
> 2.20.1
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-20 11:21 ` Bartosz Golaszewski
@ 2019-02-20 12:15 ` Greg Kroah-Hartman
2019-02-21 9:53 ` Bartosz Golaszewski
0 siblings, 1 reply; 9+ messages in thread
From: Greg Kroah-Hartman @ 2019-02-20 12:15 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Rafael J . Wysocki, Keerthy, Linus Walleij, Andy Shevchenko,
Linux Kernel Mailing List, open list:GPIO SUBSYSTEM,
Bartosz Golaszewski
On Wed, Feb 20, 2019 at 12:21:26PM +0100, Bartosz Golaszewski wrote:
> śr., 20 lut 2019 o 12:16 Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> napisał(a):
> >
> > On Wed, Feb 20, 2019 at 12:12:39PM +0100, Bartosz Golaszewski wrote:
> > > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> > >
> > > There are currently 1200+ instances of using platform_get_resource()
> > > and devm_ioremap_resource() together in the kernel tree.
> > >
> > > This patch wraps these two calls in a single helper. Thanks to that
> > > we don't have to declare a local variable for struct resource * and can
> > > omit the redundant argument for resource type. We also have one
> > > function call less.
> > >
> > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> >
> > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> >
>
> Should this go through the driver-core tree?
No need, put it through the tree for patch 2/2.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-20 12:15 ` Greg Kroah-Hartman
@ 2019-02-21 9:53 ` Bartosz Golaszewski
2019-02-21 12:06 ` Linus Walleij
0 siblings, 1 reply; 9+ messages in thread
From: Bartosz Golaszewski @ 2019-02-21 9:53 UTC (permalink / raw)
To: Linus Walleij
Cc: Rafael J . Wysocki, Keerthy, Andy Shevchenko,
Linux Kernel Mailing List, open list:GPIO SUBSYSTEM,
Bartosz Golaszewski, Greg Kroah-Hartman
śr., 20 lut 2019 o 13:15 Greg Kroah-Hartman
<gregkh@linuxfoundation.org> napisał(a):
>
> On Wed, Feb 20, 2019 at 12:21:26PM +0100, Bartosz Golaszewski wrote:
> > śr., 20 lut 2019 o 12:16 Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> napisał(a):
> > >
> > > On Wed, Feb 20, 2019 at 12:12:39PM +0100, Bartosz Golaszewski wrote:
> > > > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> > > >
> > > > There are currently 1200+ instances of using platform_get_resource()
> > > > and devm_ioremap_resource() together in the kernel tree.
> > > >
> > > > This patch wraps these two calls in a single helper. Thanks to that
> > > > we don't have to declare a local variable for struct resource * and can
> > > > omit the redundant argument for resource type. We also have one
> > > > function call less.
> > > >
> > > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> > >
> > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > >
> >
> > Should this go through the driver-core tree?
>
> No need, put it through the tree for patch 2/2.
>
> thanks,
>
> greg k-h
Linus,
can you take the two patches for v5.1?
Bart
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource()
2019-02-21 9:53 ` Bartosz Golaszewski
@ 2019-02-21 12:06 ` Linus Walleij
0 siblings, 0 replies; 9+ messages in thread
From: Linus Walleij @ 2019-02-21 12:06 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Rafael J . Wysocki, Keerthy, Andy Shevchenko,
Linux Kernel Mailing List, open list:GPIO SUBSYSTEM,
Bartosz Golaszewski, Greg Kroah-Hartman
On Thu, Feb 21, 2019 at 10:53 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> > > Should this go through the driver-core tree?
> >
> > No need, put it through the tree for patch 2/2.
> >
> > thanks,
> >
> > greg k-h
>
> Linus,
>
> can you take the two patches for v5.1?
Yup both merged to the GPIO tree, thanks!
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 9+ messages in thread
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2019-02-20 11:12 [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Bartosz Golaszewski
2019-02-20 11:12 ` [PATCH v2 1/2] drivers: provide devm_platform_ioremap_resource() Bartosz Golaszewski
2019-02-20 11:16 ` Greg Kroah-Hartman
2019-02-20 11:21 ` Bartosz Golaszewski
2019-02-20 12:15 ` Greg Kroah-Hartman
2019-02-21 9:53 ` Bartosz Golaszewski
2019-02-21 12:06 ` Linus Walleij
2019-02-20 11:12 ` [PATCH v2 2/2] gpio: davinci: use devm_platform_ioremap_resource() Bartosz Golaszewski
2019-02-20 12:04 ` [PATCH v2 0/2] drivers: new helper for ioremapping memory resources Andy Shevchenko
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