* Re: [PATCH v3 1/2] drivers: provide devm_platform_request_irq()
@ 2020-05-27 18:45 Markus Elfring
0 siblings, 0 replies; 5+ messages in thread
From: Markus Elfring @ 2020-05-27 18:45 UTC (permalink / raw)
To: Dejin Zheng, kernel-janitors, linux-doc, linux-i2c
Cc: linux-kernel, Coccinelle, Greg Kroah-Hartman, Grygorii Strashko,
Jonathan Corbet, Michal Simek, Linus Walleij, Wolfram Sang,
Wolfram Sang
> It will call devm_request_irq() after platform_get_irq() function
> in many drivers, sometimes, it is not right for the error handling
> of these two functions in some drivers. so provide this function
> to simplify the driver.
I recommend to improve also this change description.
How do you think about a wording variant like the following?
The function “devm_request_irq” is called after the
function “platform_get_irq” in many drivers.
The exception handling is incomplete there sometimes.
Thus add a corresponding wrapper function for the simplification
of the drivers.
Will a companion script for the semantic patch language (Coccinelle software)
become helpful for further support of collateral evolution?
Regards,
Markus
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3 1/2] drivers: provide devm_platform_request_irq()
2020-07-17 14:59 ` Greg KH
@ 2020-07-17 15:06 ` Dejin Zheng
0 siblings, 0 replies; 5+ messages in thread
From: Dejin Zheng @ 2020-07-17 15:06 UTC (permalink / raw)
To: Greg KH
Cc: corbet, michal.simek, wsa+renesas, linus.walleij, linux-doc,
linux-i2c, linux-kernel, Wolfram Sang
On Fri, Jul 17, 2020 at 04:59:46PM +0200, Greg KH wrote:
> On Fri, Jul 17, 2020 at 10:30:30PM +0800, Dejin Zheng wrote:
> > On Wed, May 27, 2020 at 10:26:10PM +0800, Dejin Zheng wrote:
> > Hi Jonathan, Greg, Rafael, Linus, Michal and Wolfram:
> >
> > Could you help me review this patch if you have free time?
>
> It's not anywhere in queue, sorry, please resend it?
>
Ok, I will resend it. Thanks very much!
BR,
Dejin
> thanks,
>
> greg k-h
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3 1/2] drivers: provide devm_platform_request_irq()
2020-07-17 14:30 ` Dejin Zheng
@ 2020-07-17 14:59 ` Greg KH
2020-07-17 15:06 ` Dejin Zheng
0 siblings, 1 reply; 5+ messages in thread
From: Greg KH @ 2020-07-17 14:59 UTC (permalink / raw)
To: Dejin Zheng
Cc: corbet, michal.simek, wsa+renesas, linus.walleij, linux-doc,
linux-i2c, linux-kernel, Wolfram Sang
On Fri, Jul 17, 2020 at 10:30:30PM +0800, Dejin Zheng wrote:
> On Wed, May 27, 2020 at 10:26:10PM +0800, Dejin Zheng wrote:
> Hi Jonathan, Greg, Rafael, Linus, Michal and Wolfram:
>
> Could you help me review this patch if you have free time?
It's not anywhere in queue, sorry, please resend it?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v3 1/2] drivers: provide devm_platform_request_irq()
2020-05-27 14:26 Dejin Zheng
@ 2020-07-17 14:30 ` Dejin Zheng
2020-07-17 14:59 ` Greg KH
0 siblings, 1 reply; 5+ messages in thread
From: Dejin Zheng @ 2020-07-17 14:30 UTC (permalink / raw)
To: corbet, gregkh, michal.simek, wsa+renesas, linus.walleij,
linux-doc, linux-i2c, linux-kernel
Cc: Wolfram Sang
On Wed, May 27, 2020 at 10:26:10PM +0800, Dejin Zheng wrote:
Hi Jonathan, Greg, Rafael, Linus, Michal and Wolfram:
Could you help me review this patch if you have free time?
Thank you very very much!
BR,
Dejin
> It will call devm_request_irq() after platform_get_irq() function
> in many drivers, sometimes, it is not right for the error handling
> of these two functions in some drivers. so provide this function
> to simplify the driver.
>
> Cc: Michal Simek <michal.simek@xilinx.com>
> Cc: Wolfram Sang <wsa@the-dreams.de>
> Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
> ---
> v2 -> v3:
> - add devm_platform_request_irq() to devres.rst by Grygorii's
> suggestion.
> v1 -> v2:
> - The patch content has not changed. just resend it by this discussion:
> https://patchwork.ozlabs.org/project/linux-i2c/patch/20200520144821.8069-1-zhengdejin5@gmail.com/
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v3 1/2] drivers: provide devm_platform_request_irq()
@ 2020-05-27 14:26 Dejin Zheng
2020-07-17 14:30 ` Dejin Zheng
0 siblings, 1 reply; 5+ messages in thread
From: Dejin Zheng @ 2020-05-27 14:26 UTC (permalink / raw)
To: corbet, gregkh, michal.simek, wsa+renesas, linus.walleij,
linux-doc, linux-i2c, linux-kernel
Cc: Dejin Zheng, Wolfram Sang
It will call devm_request_irq() after platform_get_irq() function
in many drivers, sometimes, it is not right for the error handling
of these two functions in some drivers. so provide this function
to simplify the driver.
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
---
v2 -> v3:
- add devm_platform_request_irq() to devres.rst by Grygorii's
suggestion.
v1 -> v2:
- The patch content has not changed. just resend it by this discussion:
https://patchwork.ozlabs.org/project/linux-i2c/patch/20200520144821.8069-1-zhengdejin5@gmail.com/
.../driver-api/driver-model/devres.rst | 1 +
drivers/base/platform.c | 33 +++++++++++++++++++
include/linux/platform_device.h | 4 +++
3 files changed, 38 insertions(+)
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 644078332354..89681264ee2c 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -325,6 +325,7 @@ IRQ
devm_request_any_context_irq()
devm_request_irq()
devm_request_threaded_irq()
+ devm_platform_request_irq()
devm_irq_alloc_descs()
devm_irq_alloc_desc()
devm_irq_alloc_desc_at()
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index c0d0a5490ac6..1d2fd1ea3bc5 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -275,6 +275,39 @@ int platform_irq_count(struct platform_device *dev)
}
EXPORT_SYMBOL_GPL(platform_irq_count);
+/**
+ * devm_platform_request_irq - get an irq and allocate an interrupt
+ * line for a managed device
+ * @pdev: platform device
+ * @num: IRQ number index
+ * @irq: get an IRQ for a device if irq != NULL
+ * @handler: function to be called when the IRQ occurs
+ * @irqflags: interrupt type flags
+ * @devname: an ascii name for the claiming device, dev_name(dev) if NULL
+ * @dev_id: a cookie passed back to the handler function
+ *
+ * Return: zero on success, negative error number on failure.
+ */
+int devm_platform_request_irq(struct platform_device *pdev, unsigned int num,
+ unsigned int *irq, irq_handler_t handler,
+ unsigned long irqflags, const char *devname, void *dev_id)
+{
+ int tmp_irq, ret;
+
+ tmp_irq = platform_get_irq(pdev, num);
+ if (tmp_irq < 0)
+ return tmp_irq;
+
+ ret = devm_request_irq(&pdev->dev, tmp_irq, handler, irqflags,
+ devname, dev_id);
+ if (ret < 0)
+ dev_err(&pdev->dev, "can't request IRQ\n");
+ else if (irq != NULL)
+ *irq = tmp_irq;
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_platform_request_irq);
+
/**
* platform_get_resource_byname - get a resource for a device by name
* @dev: platform device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 77a2aada106d..d94652deea5c 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -11,6 +11,7 @@
#define _PLATFORM_DEVICE_H_
#include <linux/device.h>
+#include <linux/interrupt.h>
#define PLATFORM_DEVID_NONE (-1)
#define PLATFORM_DEVID_AUTO (-2)
@@ -70,6 +71,9 @@ devm_platform_ioremap_resource_byname(struct platform_device *pdev,
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 *);
+extern int devm_platform_request_irq(struct platform_device *pdev,
+ unsigned int num, unsigned int *irq, irq_handler_t handler,
+ unsigned long irqflags, const char *devname, void *dev_id);
extern struct resource *platform_get_resource_byname(struct platform_device *,
unsigned int,
const char *);
--
2.25.0
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2020-05-27 14:26 Dejin Zheng
2020-07-17 14:30 ` Dejin Zheng
2020-07-17 14:59 ` Greg KH
2020-07-17 15:06 ` Dejin Zheng
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