Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Philippe Schenker <dev@pschenker.ch>
To:     linux-iio@vger.kernel.org, Jonathan Cameron <jic23@kernel.org>,
        Stefan Agner <stefan@agner.ch>,
        Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc:     Marcel Ziswiler <marcel.ziswiler@toradex.com>,
        David Laight <David.Laight@ACULAB.COM>, dev@pschenker.ch,
        Philippe Schenker <philippe.schenker@toradex.com>,
        Max Krummenacher <max.krummenacher@toradex.com>,
        Alexandre Torgue <alexandre.torgue@st.com>,
        linux-kernel@vger.kernel.org, Lee Jones <lee.jones@linaro.org>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/5] iio: stmpe-adc: Reset possible interrupts
Date:   Tue,  7 May 2019 16:36:15 +0200
Message-Id: <20190507143615.28477-5-dev@pschenker.ch>
In-Reply-To: <20190507143615.28477-1-dev@pschenker.ch>
References: <20190507143615.28477-1-dev@pschenker.ch>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Philippe Schenker <philippe.schenker@toradex.com>

Clear any interrupt that still is on the device on every channel
this driver is activated for in probe and specific channels in
the timeout handler.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>

---

 drivers/iio/adc/stmpe-adc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/iio/adc/stmpe-adc.c b/drivers/iio/adc/stmpe-adc.c
index cc752a47444c..a5990e9f2c80 100644
--- a/drivers/iio/adc/stmpe-adc.c
+++ b/drivers/iio/adc/stmpe-adc.c
@@ -80,6 +80,8 @@ static int stmpe_read_voltage(struct stmpe_adc *info,
 	ret = wait_for_completion_timeout(&info->completion, STMPE_ADC_TIMEOUT);
 
 	if (ret <= 0) {
+		stmpe_reg_write(info->stmpe, STMPE_REG_ADC_INT_STA,
+				STMPE_ADC_CH(info->channel));
 		mutex_unlock(&info->lock);
 		return -ETIMEDOUT;
 	}
@@ -326,6 +328,9 @@ static int stmpe_adc_probe(struct platform_device *pdev)
 	stmpe_reg_write(info->stmpe, STMPE_REG_ADC_INT_EN,
 			~(norequest_mask & 0xFF));
 
+	stmpe_reg_write(info->stmpe, STMPE_REG_ADC_INT_STA,
+			~(norequest_mask & 0xFF));
+
 	return devm_iio_device_register(&pdev->dev, indio_dev);
 }
 
-- 
2.21.0