linux-kernel - [PATCH v2 6/8] drivers:input:ads7846(+tsc2046): recognise old binding for coordinate flipping

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Message-Id: <f036e0d2b019ae9463e108f48643c16a80936ddb.1447446957.git.hns@goldelico.com>
Date:	Fri, 13 Nov 2015 21:35:57 +0100
From:	"H. Nikolaus Schaller" <hns@...delico.com>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"H. Nikolaus Schaller" <hns@...delico.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Sebastian Reichel <sre@...nel.org>,
	Haibo Chen <haibo.chen@...escale.com>,
	Andrey Gelman <andrey.gelman@...pulab.co.il>,
	Igor Grinberg <grinberg@...pulab.co.il>,
	Aaron Sierra <asierra@...-inc.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org, gta04-owner@...delico.com,
	linux-input@...r.kernel.org
Subject: [PATCH v2 6/8] drivers:input:ads7846(+tsc2046): recognise old binding for coordinate flipping

By this patch we still recognise the old binding ti,swap-xy in parallel to
the common binding touchscreen-swapped-x-y. This keeps compatibility
to older (out-of-tree) device tree binaries.

We do this in a separate patch so that it can be easily reverted in the
future to retire the old API. A notice is printed to remind developers
of using old API.

We also fix the bindings name for all in-tree device tree sources in
a separate patch.

Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
---
 drivers/input/touchscreen/ads7846.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 4525f00..b9896fd 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -1259,7 +1259,11 @@ static const struct ads7846_platform_data *ads7846_probe_dt(struct device *dev)
 	of_property_read_u16(node, "ti,vref-mv", &pdata->vref_mv);
 	pdata->keep_vref_on = of_property_read_bool(node, "ti,keep-vref-on");
 
-	pdata->swap_xy = of_property_read_bool(node, "touchscreen-swapped-x-y");
+	pdata->swap_xy = of_property_read_bool(node, "ti,swap-xy");
+	if (pdata->swap_xy)
+		dev_notice(dev, "please update device tree to use touchscreen-swapped-x-y");
+	pdata->swap_xy |= of_property_read_bool(node,
+						"touchscreen-swapped-x-y");
 
 	of_property_read_u16(node, "ti,settle-delay-usec",
 			     &pdata->settle_delay_usecs);
-- 
2.5.1

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