From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christophe Ricard Subject: [PATCH v2 33/35] nfc: st-nci: Make sure irq is not already active when powering the device Date: Sun, 25 Oct 2015 22:54:48 +0100 Message-ID: <1445810090-18403-34-git-send-email-christophe-h.ricard@st.com> References: <1445810090-18403-1-git-send-email-christophe-h.ricard@st.com> Return-path: In-Reply-To: <1445810090-18403-1-git-send-email-christophe-h.ricard-qxv4g6HH51o@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: sameo-VuQAYsv1563Yd54FQh9/CA@public.gmane.org Cc: linux-nfc-hn68Rpc1hR1g9hUCZPvPmw@public.gmane.org, christophe-h.ricard-qxv4g6HH51o@public.gmane.org, christophe.ricard-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Upon some conditions (timing, CLF errors, platform errors...), the irq might be already active when powering the device. Add irq_active variable as a guard to avoid kernel warning message Signed-off-by: Christophe Ricard --- drivers/nfc/st-nci/i2c.c | 8 +++++++- drivers/nfc/st-nci/spi.c | 8 +++++++- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/nfc/st-nci/i2c.c b/drivers/nfc/st-nci/i2c.c index 2a96f1a..25e5042 100644 --- a/drivers/nfc/st-nci/i2c.c +++ b/drivers/nfc/st-nci/i2c.c @@ -50,6 +50,8 @@ struct st_nci_i2c_phy { struct i2c_client *i2c_dev; struct llt_ndlc *ndlc; + bool irq_active; + unsigned int gpio_reset; unsigned int irq_polarity; @@ -72,8 +74,10 @@ static int st_nci_i2c_enable(void *phy_id) gpio_set_value(phy->gpio_reset, 1); usleep_range(80000, 85000); - if (phy->ndlc->powered == 0) + if (phy->ndlc->powered == 0 && phy->irq_active == 0) { enable_irq(phy->i2c_dev->irq); + phy->irq_active = true; + } return 0; } @@ -83,6 +87,7 @@ static void st_nci_i2c_disable(void *phy_id) struct st_nci_i2c_phy *phy = phy_id; disable_irq_nosync(phy->i2c_dev->irq); + phy->irq_active = false; } /* @@ -342,6 +347,7 @@ static int st_nci_i2c_probe(struct i2c_client *client, return r; } + phy->irq_active = true; r = devm_request_threaded_irq(&client->dev, client->irq, NULL, st_nci_irq_thread_fn, phy->irq_polarity | IRQF_ONESHOT, diff --git a/drivers/nfc/st-nci/spi.c b/drivers/nfc/st-nci/spi.c index 8897203..bf6643c 100644 --- a/drivers/nfc/st-nci/spi.c +++ b/drivers/nfc/st-nci/spi.c @@ -51,6 +51,8 @@ struct st_nci_spi_phy { struct spi_device *spi_dev; struct llt_ndlc *ndlc; + bool irq_active; + unsigned int gpio_reset; unsigned int irq_polarity; @@ -73,8 +75,10 @@ static int st_nci_spi_enable(void *phy_id) gpio_set_value(phy->gpio_reset, 1); usleep_range(80000, 85000); - if (phy->ndlc->powered == 0) + if (phy->ndlc->powered == 0 && phy->irq_active == 0) { enable_irq(phy->spi_dev->irq); + phy->irq_active = true; + } return 0; } @@ -84,6 +88,7 @@ static void st_nci_spi_disable(void *phy_id) struct st_nci_spi_phy *phy = phy_id; disable_irq_nosync(phy->spi_dev->irq); + phy->irq_active = false; } /* @@ -358,6 +363,7 @@ static int st_nci_spi_probe(struct spi_device *dev) return r; } + phy->irq_active = true; r = devm_request_threaded_irq(&dev->dev, dev->irq, NULL, st_nci_irq_thread_fn, phy->irq_polarity | IRQF_ONESHOT, -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html