From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Krzysztof Kozlowski To: MyungJoo Ham , Chanwoo Choi , Samuel Ortiz , Lee Jones , linux-kernel@vger.kernel.org Cc: Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH fixes 2/2] extcon: max77693: Fix always masked MUIC interrupts Date: Fri, 10 Oct 2014 10:22:02 +0200 Message-id: <1412929322-21908-2-git-send-email-k.kozlowski@samsung.com> In-reply-to: <1412929322-21908-1-git-send-email-k.kozlowski@samsung.com> References: <1412929322-21908-1-git-send-email-k.kozlowski@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 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(+) 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) -- 1.9.1