From: Grygorii Strashko <grygorii.strashko@ti.com>
To: "Lothar Waßmann" <LW@KARO-electronics.de>,
"Benoît Cousson" <bcousson@baylibre.com>,
"Ian Campbell" <ijc+devicetree@hellion.org.uk>,
"Kumar Gala" <galak@codeaurora.org>,
"Liam Girdwood" <lgirdwood@gmail.com>,
"Mark Brown" <broonie@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Pawel Moll" <pawel.moll@arm.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Russell King" <linux@arm.linux.org.uk>,
"Tony Lindgren" <tony@atomide.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org
Subject: Re: [PATCH 1/2] regulator: ltc3589: make IRQ optional
Date: Wed, 20 Jan 2016 19:29:47 +0200 [thread overview]
Message-ID: <569FC40B.5030902@ti.com> (raw)
In-Reply-To: <1453292992-1788-2-git-send-email-LW@KARO-electronics.de>
On 01/20/2016 02:29 PM, Lothar Waßmann wrote:
> On the AM335x SoC rev. <= 1.0 the "Input Function of the EXTINTn
> Terminal is Inverted", for which the only remedy is to "Use an active
> high interrupt source or use an external inverter to change the
> polarity of any active low interrupt source."
>
> This pin is used as IRQ pin for the LTC3589 PMIC on the Ka-Ro
> electronics TX48 module. Make the IRQ optional in the driver and use a
> polling routine instead if no IRQ is specified in DT.
> Otherwise the driver will continuously generate interrupts and make
> the system unusable.
>
> Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
> ---
> drivers/regulator/ltc3589.c | 49 +++++++++++++++++++++++++++++++++++++++++----
> 1 file changed, 45 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/regulator/ltc3589.c b/drivers/regulator/ltc3589.c
[...]
> }
> @@ -519,6 +539,16 @@ static int ltc3589_probe(struct i2c_client *client,
> return ret;
> }
> }
> + if (client->irq <= 0) {
> + dev_warn(dev,
> + "No interrupt configured; poll for thermal shutdown and undervoltage events\n");
> +
> + INIT_DELAYED_WORK(<c3589->poll_timer, ltc3589_poll_func);
> + schedule_delayed_work(<c3589->poll_timer,
> + msecs_to_jiffies(POLL_PERIOD));
> +
> + return 0;
> + }
>
> ret = devm_request_threaded_irq(dev, client->irq, NULL, ltc3589_isr,
> IRQF_TRIGGER_LOW | IRQF_ONESHOT,
^^^^^^^^^^^^^^^^
I assume you have issue with IRQ because of the above hard-coded flag.
if yes - Over all approach for such kind of issues - do not hard-code IRQ triggering
flags in code in case of DT boot. DT core will configure it properly.
[...]
--
regards,
-grygorii
next prev parent reply other threads:[~2016-01-20 17:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-20 12:29 PATCH [0/2] ARM: dts: am33xx: add support for Ka-Ro electronics TX48-7020 module Lothar Waßmann
2016-01-20 12:29 ` [PATCH 1/2] regulator: ltc3589: make IRQ optional Lothar Waßmann
2016-01-20 16:42 ` Mark Brown
2016-01-21 7:05 ` Lothar Waßmann
2016-01-21 10:20 ` Mark Brown
2016-01-21 10:26 ` Lothar Waßmann
2016-01-21 11:11 ` Mark Brown
2016-01-21 11:33 ` Lothar Waßmann
2016-01-21 16:26 ` Mark Brown
2016-01-22 5:41 ` Lothar Waßmann
2016-01-22 16:26 ` Mark Brown
2016-01-25 12:37 ` Lothar Waßmann
2016-01-25 12:41 ` Mark Brown
2016-01-25 12:51 ` Lothar Waßmann
2016-01-25 13:52 ` Mark Brown
2016-01-20 17:29 ` Grygorii Strashko [this message]
2016-01-20 12:29 ` [PATCH 2/2] ARM: dts: am33xx: add support for Ka-Ro electronics TX48-7020 module Lothar Waßmann
2016-01-20 16:32 ` Robert Nelson
2016-02-12 22:07 ` Tony Lindgren
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