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From:   =?UTF-8?q?Ronald=20Tschal=C3=A4r?= <ronald@innovation.ch>
To:     Jiri Kosina <jikos@kernel.org>,
        Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        Jonathan Cameron <jic23@kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc:     linux-kernel@vger.kernel.org, linux-input@vger.kernel.org,
        linux-iio@vger.kernel.org
Subject: [PATCH 2/5] iio: hid-sensor-als: Support change sensitivity in illuminance too.
Date:   Sat, 27 Feb 2021 17:26:40 -0800
Message-Id: <20210228012643.69944-3-ronald@innovation.ch>
In-Reply-To: <20210228012643.69944-1-ronald@innovation.ch>
References: <20210228012643.69944-1-ronald@innovation.ch>
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Precedence: bulk

Recent MacBook Pro's specify the usage of the change sensitivity field
as illuminance (with a change sensitivity modifier) rather than as
light.

Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
---
 drivers/iio/light/hid-sensor-als.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index a21c827e4953d..849ee37dcd866 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -252,6 +252,14 @@ static int als_parse_report(struct platform_device *pdev,
 			HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
 			HID_USAGE_SENSOR_DATA_LIGHT,
 			&st->common_attributes.sensitivity);
+
+		if (st->common_attributes.sensitivity.index < 0)
+			sensor_hub_input_get_attribute_info(hsdev,
+				HID_FEATURE_REPORT, usage_id,
+				HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+				HID_USAGE_SENSOR_LIGHT_ILLUM,
+				&st->common_attributes.sensitivity);
+
 		dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
 			st->common_attributes.sensitivity.index,
 			st->common_attributes.sensitivity.report_id);
-- 
2.26.2