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;
Received-SPF: Pass (protection.outlook.com: domain of analog.com designates
 137.71.25.55 as permitted sender) receiver=protection.outlook.com;
 client-ip=137.71.25.55; helo=nwd2mta1.analog.com;
From:   Beniamin Bia <beniamin.bia@analog.com>
To:     <jic23@kernel.org>
CC:     <lars@metafoo.de>, <Michael.Hennerich@analog.com>,
        <knaack.h@gmx.de>, <pmeerw@pmeerw.net>,
        <gregkh@linuxfoundation.org>, <linux-iio@vger.kernel.org>,
        <devel@driverdev.osuosl.org>, <linux-kernel@vger.kernel.org>,
        <mark.rutland@arm.com>, <robh+dt@kernel.org>,
        <devicetree@vger.kernel.org>, <biabeniamin@outlook.com>,
        Beniamin Bia <beniamin.bia@analog.com>
Subject: [PATCH 5/5] iio: adc: ad7606: Add debug mode for ad7616
Date:   Thu, 16 May 2019 17:32:08 +0300
Message-ID: <20190516143208.19294-5-beniamin.bia@analog.com>
In-Reply-To: <20190516143208.19294-1-beniamin.bia@analog.com>
References: <20190516143208.19294-1-beniamin.bia@analog.com>
MIME-Version: 1.0
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 May 2019 14:32:04.3820
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: dfeba55f-a1fa-4757-bd11-08d6da0b448e
X-MS-Exchange-CrossTenant-Id: eaa689b4-8f87-40e0-9c6f-7228de4d754a
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=eaa689b4-8f87-40e0-9c6f-7228de4d754a;Ip=[137.71.25.55];Helo=[nwd2mta1.analog.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL2PR03MB545
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Support for register access was added for spi devices.

Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
---
 drivers/iio/adc/ad7606.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index f77df3efe43f..b03bdce4fd4e 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -134,6 +134,30 @@ static int ad7606_spi_write_mask(struct ad7606_state *st,
 	return ad7606_spi_reg_write(st, addr, readval);
 }
 
+static int ad7606_reg_access(struct iio_dev *indio_dev,
+			     unsigned int reg,
+			     unsigned int writeval,
+			     unsigned int *readval)
+{
+	struct ad7606_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&st->lock);
+	if (readval) {
+		ret = ad7606_spi_reg_read(st, reg);
+		if (ret < 0)
+			goto err_unlock;
+		*readval = ret;
+		ret = 0;
+	} else {
+		ret = ad7606_spi_reg_write(st, reg, writeval);
+	}
+err_unlock:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
 static int ad7606_read_samples(struct ad7606_state *st)
 {
 	unsigned int num = st->chip_info->num_channels;
@@ -645,6 +669,7 @@ static const struct iio_info ad7606_info_no_os_or_range = {
 static const struct iio_info ad7606_info_os_and_range = {
 	.read_raw = &ad7606_read_raw,
 	.write_raw = &ad7606_write_raw,
+	.debugfs_reg_access = &ad7606_reg_access,
 	.attrs = &ad7606_attribute_group_os_and_range,
 	.validate_trigger = &ad7606_validate_trigger,
 };
-- 
2.17.1