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[2001:14ba:a073:af00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5a870f96cb1sm3480516e87.22.2026.05.07.02.01.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 May 2026 02:01:42 -0700 (PDT) From: Dmitry Baryshkov Date: Thu, 07 May 2026 12:01:32 +0300 Subject: [PATCH v5 1/2] dt-bindings: gpio: describe Waveshare GPIO controller Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260507-waveshare-dsi-touch-v5-1-d2ac7ccc22d4@oss.qualcomm.com> References: <20260507-waveshare-dsi-touch-v5-0-d2ac7ccc22d4@oss.qualcomm.com> In-Reply-To: <20260507-waveshare-dsi-touch-v5-0-d2ac7ccc22d4@oss.qualcomm.com> To: Neil Armstrong , Jessica Zhang , David Airlie , Simona Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Cong Yang , Ondrej Jirman , Javier Martinez Canillas , Jagan Teki , Liam Girdwood , Mark Brown , Linus Walleij , Bartosz Golaszewski , Jie Gan Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Conor Dooley X-Mailer: b4 0.15.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=2894; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=w48Zy9gh5QY1c+XBDez5fRMIM+TtMcaQ5hJ5uAZ3v3w=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBp/FTuy7mfOfX5kl07Us/qpiAyzHwTLGyx9ydu7 NTUppEPARqJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCafxU7gAKCRCLPIo+Aiko 1fdWB/wPpnOVm0D7aCjD77DcG2BIksrTgqtu9mc4m1QefgIzAtXub3PGmjaGDderabja1f83ALp zo8EPN+tQ0rC+z0iODQc5GXSI9+tts3VhNMtFdsA6RD+zIy8TQhbOH+UQPKrih7HfahBpuOtaJu QLSuBephxSEjUKCXAKnVBk+XLwW2Z3qrr2hn0OcHcSftvkMCWOaaRnMADPaO3zOK3C+4h5QZp81 DxAPUVe2/UnLBw5mbDUVNd1tzbOqwRCv/12pRB1/CZ6/QHVEaP8JaYAgTYdGYl4t3GXiuIAf1Yv fVOpqEJXCR9qr1WOCaratjm5n3XioAimdHG3GVbfk2gwfd0d X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-ORIG-GUID: gOPGHKFn5FUoec03lnljRzi1uSTSkEiY X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA3MDA4OSBTYWx0ZWRfX+hg9Dyl3S3Mh 3hxER6i3Jx1pI2AMM4ABR6viDIF772KE2GItjzgMXWftu57TiifTaWi67vSUwXrdF//7V/3auqZ iVDNVLLApNcJopB9EOKeA1gnmj/xDpaL4ghlMAPn/KV3hs1Stt1GlzqFjN8yv+BmVL4wE/oF1HQ wZ5SRjtWCRBe4KhxvqM8Jr9EFueF2cd75Aid3+K21kauCoIKwH/m8QVqV0lwsWZVl17oVfbITaB hpi6Hljo7/Ha+A7w30unOIxNVVDhAEZjypSRXSJC5fg6Kky2NrL+Clj3h/9zuEKDbbeQqdWKjz9 gAC3IwMUuHnVVn2vg+MjSeeS6b3sw520e2x13wngG/w6LyCVal8a07B48VBJmcQkoBj+I5GFuj6 2BcKCipOPHHXvJHiWtErweO4K4dluFVjRiRyw7GAJ4mSuv9drdsWmAqEuXIkdvJZc/lUywN2vjE L6lX+HHMuiAZq4KLo+g== X-Proofpoint-GUID: gOPGHKFn5FUoec03lnljRzi1uSTSkEiY X-Authority-Analysis: v=2.4 cv=X8Zi7mTe c=1 sm=1 tr=0 ts=69fc54f9 cx=c_pps a=lVi5GcDxkcJcfCmEjVJoaw==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=gEfo2CItAAAA:8 a=XYAwZIGsAAAA:8 a=EUspDBNiAAAA:8 a=btNYDYKGUqI20VIe7WUA:9 a=QEXdDO2ut3YA:10 a=rBiNkAWo9uy_4UTK5NWh:22 a=sptkURWiP4Gy88Gu7hUp:22 a=E8ToXWR_bxluHZ7gmE-Z:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-06_02,2026-05-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 suspectscore=0 spamscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 phishscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605070089 The Waveshare DSI TOUCH family of panels has separate on-board GPIO controller, which controls power supplies to the panel and the touch screen and provides reset pins for both the panel and the touchscreen. Also it provides a simple PWM controller for panel backlight. Add bindings for these GPIO controllers. As overall integration might be not very obvious (and it differs significantly from the bindings used by the original drivers), provide complete example with the on-board regulators and the DSI panel. Acked-by: Conor Dooley Signed-off-by: Dmitry Baryshkov --- .../bindings/gpio/waveshare,dsi-touch-gpio.yaml | 73 ++++++++++++++++++++++ 1 file changed, 73 insertions(+) diff --git a/Documentation/devicetree/bindings/gpio/waveshare,dsi-touch-gpio.yaml b/Documentation/devicetree/bindings/gpio/waveshare,dsi-touch-gpio.yaml new file mode 100644 index 000000000000..091e1fffcd47 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/waveshare,dsi-touch-gpio.yaml @@ -0,0 +1,73 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/waveshare,dsi-touch-gpio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Waveshare GPIO controller on DSI TOUCH panels + +maintainers: + - Dmitry Baryshkov + +description: + Waveshare DSI TOUCH panel kits contain separate GPIO controller for toggling + power supplies and panel / touchscreen resets. + +properties: + compatible: + const: waveshare,dsi-touch-gpio + + reg: + maxItems: 1 + + gpio-controller: true + + '#gpio-cells': + const: 2 + +required: + - compatible + - reg + - gpio-controller + - "#gpio-cells" + +additionalProperties: false + +examples: + - | + #include + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + wsgpio: gpio@45 { + compatible = "waveshare,dsi-touch-gpio"; + reg = <0x45>; + gpio-controller; + #gpio-cells = <2>; + }; + }; + + panel_avdd: regulator-panel-avdd { + compatible = "regulator-fixed"; + regulator-name = "panel-avdd"; + gpios = <&wsgpio 0 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + + panel_iovcc: regulator-panel-iovcc { + compatible = "regulator-fixed"; + regulator-name = "panel-iovcc"; + gpios = <&wsgpio 4 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + + panel_vcc: regulator-panel-vcc { + compatible = "regulator-fixed"; + regulator-name = "panel-vcc"; + gpios = <&wsgpio 8 GPIO_ACTIVE_HIGH>; + enable-active-high; + regulator-always-on; + }; +... -- 2.47.3