linux-kernel - Re: [PATCH RESEND v2] gpio: omap: Add omap_gpio_disable/enable

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Message-ID: <520c7e6b-f9c0-441f-8810-8e5ede668f6a@ti.com>
Date: Tue, 5 Nov 2024 12:47:58 -0600
From: Judith Mendez <jm@...com>
To: Kevin Hilman <khilman@...nel.org>, Santosh Shilimkar <ssantosh@...nel.org>
CC: Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski
	<brgl@...ev.pl>, <linux-omap@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bin Liu <b-liu@...com>
Subject: Re: [PATCH RESEND v2] gpio: omap: Add omap_gpio_disable/enable_irq
 calls

Hi Kevin,

On 11/1/24 9:29 AM, Kevin Hilman wrote:
> Hi Judith,
> 
> Judith Mendez <jm@...com> writes:
> 
>> From: Bin Liu <b-liu@...com>
>>
>> Add omap_gpio_disable_irq and omap_gpio_enable_irq
>> calls in gpio-omap.
>>
>> Currently, kernel cannot disable gpio interrupts in
>> case of a irq storm, so add omap_gpio_disable/enable_irq
>> so that interrupts can be disabled/enabled.
>>
>> Signed-off-by: Bin Liu <b-liu@...com>
>> [Judith: Add commit message]
>> Signed-off-by: Judith Mendez <jm@...com>
> 
> Thanks for this patch.  Can you give a bit more context on the
> problem(s) this solves and on which SoCs/platforms it was
> developed/validated?

Sorry for the late response. Patch was tested/developed on am335x
device BBB, If you feed a PWM signal at 200KHz frequency to
GPIO, and execute gpiomon 0 12 &, Linux will be unresponsive
even after CTRL+C without these 2 functions in this patch. Once
this patch is applied, you can get console back after hitting
CTRL+C and then proceed to kill gpiomon.

~ Judith