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Linux aarch64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190211122606.8662-18-brgl@bgdev.pl> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190211_050046_541516_A902BDA6 X-CRM114-Status: GOOD ( 19.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bartosz Golaszewski , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 11/02/2019 12:25, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski > > I've been unable to figure out exactly why, but it seems that the > IRQ_TINT1_TINT34 interrupt for timer 1 needs to be handled as a > level irq, not edge like all others. That's probably because its comparator maintains the interrupt asserted as long as its value is less than the counter. Level-trigger timers are the most common thing on this side of the known universe. > > Let's move the handler setup out of the aintc driver where it's lived > since the beginning and into the dm* SoC-specific files where it > belongs. > > Signed-off-by: Bartosz Golaszewski > --- > arch/arm/mach-davinci/dm355.c | 8 ++++++++ > arch/arm/mach-davinci/dm365.c | 8 ++++++++ > arch/arm/mach-davinci/dm644x.c | 8 ++++++++ > arch/arm/mach-davinci/dm646x.c | 8 ++++++++ > arch/arm/mach-davinci/irq.c | 3 --- > 5 files changed, 32 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c > index c7cd765114af..a732f2ea1d9a 100644 > --- a/arch/arm/mach-davinci/dm355.c > +++ b/arch/arm/mach-davinci/dm355.c > @@ -15,6 +15,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -744,6 +745,13 @@ void __init dm355_init_time(void) > psc = ioremap(DAVINCI_PWR_SLEEP_CNTRL_BASE, SZ_4K); > dm355_psc_init(NULL, psc); > > + /* > + * Nobody knows why anymore, but this interrupt has been handled as > + * a level irq from the very beginning of davinci support in mainline > + * linux. > + */ > + irq_set_handler(DAVINCI_INTC_IRQ(IRQ_TINT1_TINT34), handle_level_irq); > + Now, the real question is: why isn't that set as part of the set_irq_type() callback, instead of hardcoding it in the platform? This is exactly the kind of information that should come as part of the DT or from the driver as one of the request_irq() flags. It would save quite a bit of boilerplate code. Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel