From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751395AbaJJJtA (ORCPT ); Fri, 10 Oct 2014 05:49:00 -0400 Received: from mail-ig0-f177.google.com ([209.85.213.177]:61057 "EHLO mail-ig0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751058AbaJJJs5 (ORCPT ); Fri, 10 Oct 2014 05:48:57 -0400 Date: Fri, 10 Oct 2014 10:48:51 +0100 From: Lee Jones To: Krzysztof Kozlowski Cc: MyungJoo Ham , Chanwoo Choi , Samuel Ortiz , linux-kernel@vger.kernel.org, Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz , stable@vger.kernel.org Subject: Re: [PATCH fixes 2/2] extcon: max77693: Fix always masked MUIC interrupts Message-ID: <20141010094851.GJ26795@lee--X1> References: <1412929322-21908-1-git-send-email-k.kozlowski@samsung.com> <1412929322-21908-2-git-send-email-k.kozlowski@samsung.com> <20141010085854.GC26795@lee--X1> <1412931716.22108.0.camel@AMDC1943> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1412931716.22108.0.camel@AMDC1943> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 10 Oct 2014, Krzysztof Kozlowski wrote: > On pią, 2014-10-10 at 09:58 +0100, Lee Jones wrote: > > On Fri, 10 Oct 2014, Krzysztof Kozlowski wrote: > > > > > All interrupts coming from MUIC were ignored because interrupt source > > > register was masked. > > > > > > The Maxim 77693 has a "interrupt source" - a separate register and interrupts > > > which give information about PMIC block triggering the individual > > > interrupt (charger, topsys, MUIC, flash LED). > > > > > > By default bootloader could initialize this register to "mask all" > > > value. In such case (observed on Trats2 board) MUIC interrupts won't be > > > generated regardless of their mask status. Regmap irq chip was unmasking > > > individual MUIC interrupts but the source was masked > > > > > > Before introducing regmap irq chip this interrupt source was unmasked, > > > read and acked. Reading and acking is not necessary but unmasking is. Do > > > it in extcon driver. > > > > > > Signed-off-by: Krzysztof Kozlowski > > > Cc: > > > Fixes: 342d669c1ee4 ("mfd: max77693: Handle IRQs using regmap") > > > --- > > > drivers/extcon/extcon-max77693.c | 16 ++++++++++++++++ > > > include/linux/mfd/max77693-private.h | 5 +++++ > > > 2 files changed, 21 insertions(+) > > > > Did you run this through checkpatch? > > Yes, no complains. Run it again! One of those lines is clearly over 80 chars. > > > diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c > > > index 490e27475bac..d3adacf3187f 100644 > > > --- a/drivers/extcon/extcon-max77693.c > > > +++ b/drivers/extcon/extcon-max77693.c > > > @@ -1176,6 +1176,22 @@ static int max77693_muic_probe(struct platform_device *pdev) > > > } > > > } > > > > > > + if (i) { > > > + /* > > > + * i>0, at least one MUIC interrupt requested so need to unmask > > > + * MUIC interrupt in INTSRC register. Without that MUIC > > > + * interrupts will not be reported. > > > + */ > > > + ret = regmap_update_bits(max77693->regmap, > > > + MAX77693_PMIC_REG_INTSRC_MASK, SRC_IRQ_MUIC, > > > + ~SRC_IRQ_MUIC); > > > + if (ret < 0) { > > > + dev_err(&pdev->dev, "Could not unmask MUIC interrupt in INTSRC: %d\n", > > > + ret); > > > + return ret; > > > + } > > > + } > > > + > > > /* Initialize extcon device */ > > > info->edev = devm_extcon_dev_allocate(&pdev->dev, > > > max77693_extcon_cable); > > > diff --git a/include/linux/mfd/max77693-private.h b/include/linux/mfd/max77693-private.h > > > index e1b2b61285b9..4f1a80b66ecf 100644 > > > --- a/include/linux/mfd/max77693-private.h > > > +++ b/include/linux/mfd/max77693-private.h > > > @@ -438,6 +438,11 @@ enum max77693_irq_source { > > > MAX77693_IRQ_GROUP_NR, > > > }; > > > > > > +#define SRC_IRQ_CHARGER BIT(0) > > > +#define SRC_IRQ_TOP BIT(1) > > > +#define SRC_IRQ_FLASH BIT(2) > > > +#define SRC_IRQ_MUIC BIT(3) > > > + > > > #define LED_IRQ_FLED2_OPEN BIT(0) > > > #define LED_IRQ_FLED2_SHORT BIT(1) > > > #define LED_IRQ_FLED1_OPEN BIT(2) > > > -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog