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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d44e13d800sm119698485a.71.2025.06.28.09.18.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:18:53 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino , sales@fdhisi.com Subject: [PATCH 1/8] dt-bindings: vendor-prefixes: Add Fuda Hisi Microelectronics Date: Sat, 28 Jun 2025 12:18:38 -0400 Message-ID: <20250628161850.38865-2-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable From: Andreas F=C3=A4rber Assign vendor prefix "fdhisi", based on their domain name. Cc: sales@fdhisi.com Signed-off-by: Andreas F=C3=A4rber Signed-off-by: Jean-Fran=C3=A7ois Lessard --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Docum= entation/devicetree/bindings/vendor-prefixes.yaml index 5d2a7a8d3a..9e4d251e71 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -531,6 +531,8 @@ patternProperties: description: Fastrax Oy "^fcs,.*": description: Fairchild Semiconductor + "^fdhisi,.*": + description: Fuzhou Fuda Hisi Microelectronics Co., Ltd. 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d4431345b8sm309110485a.15.2025.06.28.09.18.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:18:55 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino , zypeng@titanmec.com Subject: [PATCH 2/8] dt-bindings: vendor-prefixes: Add Titan Micro Electronics Date: Sat, 28 Jun 2025 12:18:39 -0400 Message-ID: <20250628161850.38865-3-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable From: Andreas F=C3=A4rber Assign vendor prefix "titanmec", matching their domain name. Cc: zypeng@titanmec.com Signed-off-by: Andreas F=C3=A4rber Signed-off-by: Jean-Fran=C3=A7ois Lessard --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Docum= entation/devicetree/bindings/vendor-prefixes.yaml index 9e4d251e71..d02615496b 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -1550,6 +1550,8 @@ patternProperties: description: Texas Instruments "^tianma,.*": description: Tianma Micro-electronics Co., Ltd. + "^titanmec,.*": + description: Shenzhen Titan Micro Electronics Co., Ltd. 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6fd771dd8afsm38474476d6.54.2025.06.28.09.18.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:18:57 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 3/8] dt-bindings: vendor-prefixes: Add Princeton Technology Corp Date: Sat, 28 Jun 2025 12:18:40 -0400 Message-ID: <20250628161850.38865-4-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable Assign vendor prefix "princeton", based on their domain name. Signed-off-by: Jean-Fran=C3=A7ois Lessard --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Docum= entation/devicetree/bindings/vendor-prefixes.yaml index d02615496b..f03ab02afe 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -1218,6 +1218,8 @@ patternProperties: description: Prime View International (PVI) "^primux,.*": description: Primux Trading, S.L. + "^princeton,.*": + description: Princeton Technology Corp. "^probox2,.*": description: PROBOX2 (by W2COMP Co., Ltd.) 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d44323ef1csm307238185a.112.2025.06.28.09.18.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:18:59 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 4/8] dt-bindings: vendor-prefixes: Add Winrise Technology Date: Sat, 28 Jun 2025 12:18:41 -0400 Message-ID: <20250628161850.38865-5-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable Assign vendor prefix "winrise", matching their domain name. Signed-off-by: Jean-Fran=C3=A7ois Lessard --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Docum= entation/devicetree/bindings/vendor-prefixes.yaml index f03ab02afe..a3bf93e5dc 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -1711,6 +1711,8 @@ patternProperties: description: Wingtech Technology Co., Ltd. "^winlink,.*": description: WinLink Co., Ltd + "^winrise,.*": + description: Shenzhen Winrise Technology Co., Ltd. "^winsen,.*": description: Winsen Corp. 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d443204e61sm310869885a.75.2025.06.28.09.19.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:19:01 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 5/8] dt-bindings: vendor-prefixes: Add Wuxi i-Core Electronics Date: Sat, 28 Jun 2025 12:18:42 -0400 Message-ID: <20250628161850.38865-6-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable Assign vendor prefix "icore", based on their domain name. Signed-off-by: Jean-Fran=C3=A7ois Lessard --- Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Docum= entation/devicetree/bindings/vendor-prefixes.yaml index a3bf93e5dc..def3530099 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -694,6 +694,8 @@ patternProperties: description: International Business Machines (IBM) "^ibm,.*": description: International Business Machines (IBM) + "^icore,.*": + description: Wuxi i-Core Electronics Co., Ltd. "^icplus,.*": description: IC Plus Corp. 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4a7fc560477sm30820031cf.41.2025.06.28.09.19.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:19:03 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 6/8] dt-bindings: auxdisplay: add Titan Micro Electronics TM16XX Date: Sat, 28 Jun 2025 12:18:43 -0400 Message-ID: <20250628161850.38865-7-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable Add documentation for TM16XX and compatible LED display controllers. This patch is inspired by previous work from Andreas F=C3=A4rber and Heiner= Kallweit. Co-developed-by: Andreas F=C3=A4rber Co-developed-by: Heiner Kallweit Signed-off-by: Jean-Fran=C3=A7ois Lessard --- .../bindings/auxdisplay/tm16xx.yaml | 153 ++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 Documentation/devicetree/bindings/auxdisplay/tm16xx.yaml diff --git a/Documentation/devicetree/bindings/auxdisplay/tm16xx.yaml b/Doc= umentation/devicetree/bindings/auxdisplay/tm16xx.yaml new file mode 100644 index 0000000000..eba3d3f3f7 --- /dev/null +++ b/Documentation/devicetree/bindings/auxdisplay/tm16xx.yaml @@ -0,0 +1,153 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/auxdisplay/tm16xx.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Auxiliary displays based on TM16xx and compatible LED controllers + +maintainers: + - Jean-Fran=C3=A7ois Lessard + +description: | + TM16xx controllers manage a matrix of LEDs organized in grids (rows) and= segments (columns). + Each grid or segment can be wired to drive either a digit or individual = icons, depending on the + board design. + + Typical display example: + + =C2=A0 =C2=A0 =C2=A0 =C2=A0 --- =C2=A0 =C2=A0--- =C2=A0 =C2=A0 =C2=A0 -= -- =C2=A0 =C2=A0--- + WIFI =C2=A0| =C2=A0 | =C2=A0| =C2=A0 | =C2=A0- =C2=A0| =C2=A0 | =C2=A0= | =C2=A0 | =C2=A0USB =C2=A0PLAY + =C2=A0 =C2=A0 =C2=A0 --- =C2=A0 =C2=A0--- =C2=A0 =C2=A0 =C2=A0 --- = =C2=A0 =C2=A0--- + LAN =C2=A0 | =C2=A0 | =C2=A0| =C2=A0 | =C2=A0- =C2=A0| =C2=A0 | =C2=A0= | =C2=A0 | =C2=A0BT =C2=A0 PAUSE + =C2=A0 =C2=A0 =C2=A0 =C2=A0 --- =C2=A0 =C2=A0--- =C2=A0 =C2=A0 =C2=A0 -= -- =C2=A0 =C2=A0--- + + The controller itself is agnostic of the display layout. The specific ar= rangement + (which grids and segments drive which digits or icons) is determined by = the board-level + wiring. Therefore, these bindings describe hardware configuration at the= PCB level + to enable support of multiple display implementations using these LED co= ntrollers. + +properties: + compatible: + enum: + - titanmec,tm1618 + - titanmec,tm1620 + - titanmec,tm1628 + - titanmec,tm1650 + - fdhisi,fd620 + - fdhisi,fd628 + - fdhisi,fd650 + - fdhisi,fd6551 + - fdhisi,fd655 + - icore,aip650 + - icore,aip1618 + - icore,aip1628 + - princeton,pt6964 + - winrise,hbs658 + + reg: + maxItems: 1 + + tm16xx,digits: + description: | + Array of grid (row) indexes corresponding to specific wiring of digi= ts in the display matrix. + Defines which grid lines are connected to digit elements. + $ref: /schemas/types.yaml#/definitions/uint8-array + items: + minimum: 0 + maximum: 7 + minItems: 1 + maxItems: 8 + + tm16xx,segment-mapping: + description: | + Array of segment (column) indexes specifying the hardware layout map= ping used for digit display. + Each entry gives the segment index corresponding to a standard 7-seg= ment element (a-g). + $ref: /schemas/types.yaml#/definitions/uint8-array + items: + minimum: 0 + maximum: 7 + minItems: 7 + maxItems: 7 + + tm16xx,transposed: + description: | + Optional flag indicating if grids and segments are swapped compared = to standard matrix orientation. + This accommodates devices where segments are wired to rows and grids= to columns. + $ref: /schemas/types.yaml#/definitions/flag + + "#address-cells": + const: 2 + + "#size-cells": + const: 0 + +patternProperties: + "^led@[0-7],[0-7]$": + $ref: /schemas/leds/common.yaml# + properties: + reg: + description: Grid (row) and segment (column) index in the matrix o= f this individual LED icon + required: + - reg + +required: + - compatible + - reg + - tm16xx,digits + - tm16xx,segment-mapping + +additionalProperties: true + +examples: + - | + display_client: i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + display@24 { + compatible =3D "titanmec,tm1650"; + reg =3D <0x24>; + tm16xx,digits =3D /bits/ 8 <0 1 2 3>; + tm16xx,segment-mapping =3D /bits/ 8 <0 1 2 3 4 5 6>; + + #address-cells =3D <2>; + #size-cells =3D <0>; + + led@4,0 { + reg =3D <4 0>; + function =3D "lan"; + }; + + led@4,1 { + reg =3D <4 1>; + function =3D "wlan"; + }; + }; + }; + - | + display_client: spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + display@0 { + compatible =3D "titanmec,tm1628"; + reg =3D <0>; + tm16xx,transposed; + tm16xx,digits =3D /bits/ 8 <1 2 3 4>; + tm16xx,segment-mapping =3D /bits/ 8 <0 1 2 3 4 5 6>; + + #address-cells =3D <2>; + #size-cells =3D <0>; + + led@0,2 { + reg =3D <0 2>; + function =3D "usb"; + }; + + led@0,3 { + reg =3D <0 3>; + function =3D "power"; + }; + }; + }; --=20 2.43.0 From nobody Wed Oct 8 10:56:34 2025 Received: from mail-qv1-f54.google.com (mail-qv1-f54.google.com [209.85.219.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8945324E4A1; 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6fd772fd163sm38184206d6.94.2025.06.28.09.19.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:19:05 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 7/8] auxdisplay: Add support for Titanmec TM16xx 7 segment display controller Date: Sat, 28 Jun 2025 12:18:44 -0400 Message-ID: <20250628161850.38865-8-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable This patch introduces a new auxiliary display driver for TM16XX family LED = controllers and compatible chips: - Shenzhen Titan Micro Electronics: TM1618, TM1620, TM1628, TM1650 - Fuzhou Fuda Hisi Microelectronics: FD620, FD628, FD650, FD655, FD6551 - Wuxi i-Core Electronics: AiP650, AiP1618, AiP1628 - Princeton Technology: PT6964 - Shenzhen Winrise Technology: HBS658 Known to be successfully tested on: - H96 Max (I2C, rockchip XY_RK3328) - Magicsee N5 (I2C, amlogic s905x) - Tanix TX3 Mini (SPI, amlogic s905w) - Tanix TX6 (I2C, allwinner h6) - X92 (SPI) - X96 Max (SPI, amlogic s905x2) Acked-by: Paolo Sabatino # As primary user, inte= grated tm16xx into Armbian rockchip64 Acked-by: Christian Hewitt # As primary user, = integrated tm16xx into LibreElec Tested-by: Boris Gjenero # Tested on X92 (transpo= sed) Tested-by: Paolo Sabatino # Tested on H96 Max (X= Y_RK3328) Tested-by: Christian Hewitt # Tested on X96 Ma= x, Tanix TX3 Mini Signed-off-by: Jean-Fran=C3=A7ois Lessard --- drivers/auxdisplay/Kconfig | 18 + drivers/auxdisplay/Makefile | 1 + drivers/auxdisplay/tm16xx.c | 1305 +++++++++++++++++++++++++++++++++++ 3 files changed, 1324 insertions(+) create mode 100644 drivers/auxdisplay/tm16xx.c diff --git a/drivers/auxdisplay/Kconfig b/drivers/auxdisplay/Kconfig index bedc6133f9..0195db15f6 100644 --- a/drivers/auxdisplay/Kconfig +++ b/drivers/auxdisplay/Kconfig @@ -526,6 +526,24 @@ config SEG_LED_GPIO This driver can also be built as a module. If so, the module will be called seg-led-gpio. =20 +config TM16XX + tristate "TM16XX-compatible LED controllers display" + depends on SPI || I2C + select NEW_LEDS + select LEDS_CLASS + select LEDS_TRIGGERS + help + This driver supports the following TM16XX compatible + (I2C and SPI 7-Segment LED display controller) chips: + - Titanmec: TM1618, TM1620, TM1628, TM1650 + - Fuda Hisi: FD620, FD628, FD650, FD655, FD6551 + - i-Core: AiP650, AiP1618, AiP1628 + - Princeton: PT6964 + - Winrise: HBS658 + + This driver can also be built as a module. If so, the module + will be called tm16xx. + # # Character LCD with non-conforming interface section # diff --git a/drivers/auxdisplay/Makefile b/drivers/auxdisplay/Makefile index f5c13ed1cd..a2444cfb7a 100644 --- a/drivers/auxdisplay/Makefile +++ b/drivers/auxdisplay/Makefile @@ -16,3 +16,4 @@ obj-$(CONFIG_LINEDISP) +=3D line-display.o obj-$(CONFIG_MAX6959) +=3D max6959.o obj-$(CONFIG_PARPORT_PANEL) +=3D panel.o obj-$(CONFIG_SEG_LED_GPIO) +=3D seg-led-gpio.o +obj-$(CONFIG_TM16XX) +=3D tm16xx.o diff --git a/drivers/auxdisplay/tm16xx.c b/drivers/auxdisplay/tm16xx.c new file mode 100644 index 0000000000..6099686531 --- /dev/null +++ b/drivers/auxdisplay/tm16xx.c @@ -0,0 +1,1305 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Auxiliary Display Driver for TM16XX and compatible LED controllers + * + * Copyright (C) 2024 Jean-Fran=C3=A7ois Lessard + * + * This driver supports various LED controller chips, including TM16XX fam= ily, + * FD6XX family, PT6964, and HBS658. It provides support for both I2C and = SPI interfaces. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TM16XX_DRIVER_NAME "tm16xx" +#define TM16XX_DEVICE_NAME "display" +#define DIGIT_SEGMENTS 7 +#define MIN_SEGMENT 0 +#define MAX_SEGMENT 7 /* data stored as 8 bits (u8) */ + +/* Common bit field definitions */ +// clang-format off +/* Command type bits (bits 7-6) */ +#define TM16XX_CMD_TYPE_MASK GENMASK(7, 6) +#define TM16XX_CMD_MODE 0 +#define TM16XX_CMD_DATA BIT(6) +#define TM16XX_CMD_CTRL BIT(7) +#define TM16XX_CMD_ADDR (BIT(7) | BIT(6)) + +/* Mode command grid settings (bits 1-0) */ +#define TM16XX_MODE_GRID_MASK GENMASK(1, 0) +#define TM16XX_MODE_4GRIDS 0 +#define TM16XX_MODE_5GRIDS BIT(0) +#define TM16XX_MODE_6GRIDS BIT(1) +#define TM16XX_MODE_7GRIDS (BIT(1) | BIT(0)) + +/* Data command settings */ +#define TM16XX_DATA_ADDR_MASK BIT(2) +#define TM16XX_DATA_ADDR_AUTO 0 +#define TM16XX_DATA_ADDR_FIXED BIT(2) +#define TM16XX_DATA_MODE_MASK GENMASK(1, 0) +#define TM16XX_DATA_WRITE 0 +#define TM16XX_DATA_READ BIT(1) + +/* Control command settings */ +#define TM16XX_CTRL_ON BIT(3) +#define TM16XX_CTRL_BR_MASK GENMASK(2, 0) + +/* TM1618 specific constants */ +#define TM1618_BYTE1_MASK GENMASK(4, 0) +#define TM1618_BYTE1_RSHIFT 0 +#define TM1618_BYTE2_MASK (~TM1618_BYTE1_MASK) +#define TM1618_BYTE2_RSHIFT 2 + +/* I2C controller addresses and control settings */ +#define TM1650_CMD_CTRL 0x48 +#define TM1650_CMD_ADDR 0x68 +#define TM1650_CTRL_BR_MASK GENMASK(6, 4) +#define TM1650_CTRL_ON BIT(0) +#define TM1650_CTRL_SEG_MASK BIT(3) +#define TM1650_CTRL_SEG8_MODE 0 +#define TM1650_CTRL_SEG7_MODE BIT(3) + +#define FD655_CMD_CTRL 0x48 +#define FD655_CMD_ADDR 0x66 +#define FD655_CTRL_BR_MASK GENMASK(6, 5) +#define FD655_CTRL_ON BIT(0) + +#define FD6551_CMD_CTRL 0x48 +#define FD6551_CTRL_BR_MASK GENMASK(3, 1) +#define FD6551_CTRL_ON BIT(0) + +#define TM16XX_CTRL_BRIGHTNESS(enabled, value, prefix) \ + ((enabled) ? \ + (FIELD_PREP(prefix##_CTRL_BR_MASK, (value)) | prefix##_CTRL_ON) : \ + 0) +// clang-format on + +static char *default_value; +module_param(default_value, charp, 0644); +MODULE_PARM_DESC(default_value, "Default display value to initialize"); + +static SEG7_CONVERSION_MAP(map_seg7, MAP_ASCII7SEG_ALPHANUM); + +/* Forward declarations */ +struct tm16xx_display; + +/** + * DOC: struct tm16xx_controller - Controller-specific operations + * @max_grids: Maximum number of grids supported by the controller + * @max_brightness: Maximum brightness level supported by the controller + * @init: Configures the controller mode and brightness + * @data: Writes display data to the controller + * + * This structure holds function pointers for controller-specific operatio= ns. + */ +struct tm16xx_controller { + const u8 max_grids; + const u8 max_brightness; + int (* const init)(struct tm16xx_display *display); + int (* const data)(struct tm16xx_display *display, u8 index, u8 data); +}; + +/** + * struct tm16xx_led - LED information + * @cdev: LED class device + * @grid: Grid index of the LED + * @segment: Segment index of the LED + */ +struct tm16xx_led { + struct led_classdev cdev; + u8 grid; + u8 segment; +}; + +/** + * struct tm16xx_digit - Digit information + * @grid: Grid index of the digit + * @value: Current value of the digit + */ +struct tm16xx_digit { + u8 grid; + char value; +}; + +/** + * struct tm16xx_display - Main driver structure + * @dev: Pointer to device structure + * @controller: Pointer to controller-specific operations + * @client: Union of I2C and SPI client structures + * @main_led: LED class device for the entire display + * @leds: Array of individual LEDs + * @num_leds: Number of LEDs + * @digits: Array of digits + * @num_digits: Number of digits + * @segment_mapping: Segment mapping array + * @digit_bitmask: Bitmask for setting digit values + * @display_data: Display data buffer + * @display_data_len: Length of display data buffer + * @lock: Mutex for concurrent access protection + * @flush_init: Work structure for brightness update + * @flush_display: Work structure for display update + * @flush_status: Result of the last flush work + * @transpose_display_data: Flag indicating if segments and grids should b= e transposed when writing data + */ +struct tm16xx_display { + struct device *dev; + const struct tm16xx_controller *controller; + union { + struct i2c_client *i2c; + struct spi_device *spi; + } client; + struct led_classdev main_led; + struct tm16xx_led *leds; + int num_leds; + struct tm16xx_digit *digits; + int num_digits; + u8 segment_mapping[DIGIT_SEGMENTS]; + u8 digit_bitmask; + u8 *display_data; + size_t display_data_len; + struct mutex lock; /* protect shared display state in work functions */ + struct work_struct flush_init; + struct work_struct flush_display; + int flush_status; + bool transpose_display_data; +}; + +/** + * tm16xx_i2c_write - Write data to I2C client + * @display: Pointer to tm16xx_display structure + * @data: Data to write + * @len: Length of data + * + * Return: Number of bytes written or negative error code + */ +static int tm16xx_i2c_write(struct tm16xx_display *display, u8 *data, size= _t len) +{ + dev_dbg(display->dev, "i2c_write %*ph", (char)len, data); + + struct i2c_msg msg =3D { + .addr =3D data[0] >> 1, + .flags =3D 0, + .len =3D len - 1, + .buf =3D &data[1], + }; + int ret; + + ret =3D i2c_transfer(display->client.i2c->adapter, &msg, 1); + if (ret < 0) + return ret; + + return (ret =3D=3D 1) ? len : -EIO; +} + +/** + * tm16xx_spi_write - Write data to SPI client + * @display: Pointer to tm16xx_display structure + * @data: Data to write + * @len: Length of data + * + * Return: Number of bytes written or negative error code + */ +static int tm16xx_spi_write(struct tm16xx_display *display, u8 *data, size= _t len) +{ + dev_dbg(display->dev, "spi_write %*ph", (char)len, data); + + struct spi_device *spi =3D display->client.spi; + + return spi_write(spi, data, len); +} + +/* Controller-specific functions */ +static int tm1628_init(struct tm16xx_display *display) +{ + const enum led_brightness brightness =3D display->main_led.brightness; + const u8 num_grids =3D display->transpose_display_data ? DIGIT_SEGMENTS : + display->display_data_len; + u8 cmd; + int ret; + + /* Set mode command based on grid count */ + cmd =3D TM16XX_CMD_MODE; + if (num_grids <=3D 4) + cmd |=3D TM16XX_MODE_4GRIDS; + else if (num_grids =3D=3D 5) + cmd |=3D TM16XX_MODE_5GRIDS; + else if (num_grids =3D=3D 6) + cmd |=3D TM16XX_MODE_6GRIDS; + else + cmd |=3D TM16XX_MODE_7GRIDS; + + ret =3D tm16xx_spi_write(display, &cmd, 1); + if (ret < 0) + return ret; + + /* Set data command */ + cmd =3D TM16XX_CMD_DATA | TM16XX_DATA_ADDR_AUTO | TM16XX_DATA_WRITE; + ret =3D tm16xx_spi_write(display, &cmd, 1); + if (ret < 0) + return ret; + + /* Set control command with brightness */ + cmd =3D TM16XX_CMD_CTRL | + TM16XX_CTRL_BRIGHTNESS(brightness, brightness - 1, TM16XX); + ret =3D tm16xx_spi_write(display, &cmd, 1); + if (ret < 0) + return ret; + + return 0; +} + +static int tm1618_data(struct tm16xx_display *display, u8 index, u8 data) +{ + u8 cmds[3]; + + cmds[0] =3D TM16XX_CMD_ADDR + index * 2; + cmds[1] =3D (data & TM1618_BYTE1_MASK) >> TM1618_BYTE1_RSHIFT; + cmds[2] =3D (data & TM1618_BYTE2_MASK) >> TM1618_BYTE2_RSHIFT; + + return tm16xx_spi_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int tm1628_data(struct tm16xx_display *display, u8 index, u8 data) +{ + u8 cmds[3]; + + cmds[0] =3D TM16XX_CMD_ADDR + index * 2; + cmds[1] =3D data; // SEG 1 to 8 + cmds[2] =3D 0; // SEG 9 to 14 + + return tm16xx_spi_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int tm1650_init(struct tm16xx_display *display) +{ + u8 cmds[2]; + const enum led_brightness brightness =3D display->main_led.brightness; + + cmds[0] =3D TM1650_CMD_CTRL; + cmds[1] =3D TM16XX_CTRL_BRIGHTNESS(brightness, brightness, TM1650) | + TM1650_CTRL_SEG8_MODE; + + return tm16xx_i2c_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int tm1650_data(struct tm16xx_display *display, u8 index, u8 data) +{ + u8 cmds[2]; + + cmds[0] =3D TM1650_CMD_ADDR + index * 2; + cmds[1] =3D data; // SEG 1 to 8 + + return tm16xx_i2c_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int fd655_init(struct tm16xx_display *display) +{ + u8 cmds[2]; + const enum led_brightness brightness =3D display->main_led.brightness; + + cmds[0] =3D FD655_CMD_CTRL; + cmds[1] =3D TM16XX_CTRL_BRIGHTNESS(brightness, brightness % 3, FD655); + + return tm16xx_i2c_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int fd655_data(struct tm16xx_display *display, u8 index, u8 data) +{ + u8 cmds[2]; + + cmds[0] =3D FD655_CMD_ADDR + index * 2; + cmds[1] =3D data; // SEG 1 to 8 + + return tm16xx_i2c_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static int fd6551_init(struct tm16xx_display *display) +{ + u8 cmds[2]; + const enum led_brightness brightness =3D display->main_led.brightness; + + cmds[0] =3D FD6551_CMD_CTRL; + cmds[1] =3D TM16XX_CTRL_BRIGHTNESS(brightness, ~(brightness - 1), FD6551); + + return tm16xx_i2c_write(display, cmds, ARRAY_SIZE(cmds)); +} + +static void hbs658_swap_nibbles(u8 *data, size_t len) +{ + for (size_t i =3D 0; i < len; i++) + data[i] =3D (data[i] << 4) | (data[i] >> 4); +} + +static int hbs658_init(struct tm16xx_display *display) +{ + const enum led_brightness brightness =3D display->main_led.brightness; + u8 cmd; + int ret; + + /* Set data command */ + cmd =3D TM16XX_CMD_DATA | TM16XX_DATA_ADDR_AUTO | TM16XX_DATA_WRITE; + hbs658_swap_nibbles(&cmd, 1); + ret =3D tm16xx_spi_write(display, &cmd, 1); + if (ret < 0) + return ret; + + /* Set control command with brightness */ + cmd =3D TM16XX_CMD_CTRL | + TM16XX_CTRL_BRIGHTNESS(brightness, brightness - 1, TM16XX); + hbs658_swap_nibbles(&cmd, 1); + ret =3D tm16xx_spi_write(display, &cmd, 1); + if (ret < 0) + return ret; + + return 0; +} + +static int hbs658_data(struct tm16xx_display *display, u8 index, u8 data) +{ + u8 cmds[2]; + + cmds[0] =3D TM16XX_CMD_ADDR + index * 2; + cmds[1] =3D data; + + hbs658_swap_nibbles(cmds, ARRAY_SIZE(cmds)); + return tm16xx_spi_write(display, cmds, ARRAY_SIZE(cmds)); +} + +/* Controller definitions */ +static const struct tm16xx_controller tm1618_controller =3D { + .max_grids =3D 7, + .max_brightness =3D 8, + .init =3D tm1628_init, + .data =3D tm1618_data, +}; + +static const struct tm16xx_controller tm1628_controller =3D { + .max_grids =3D 7, + .max_brightness =3D 8, + .init =3D tm1628_init, + .data =3D tm1628_data, +}; + +static const struct tm16xx_controller tm1650_controller =3D { + .max_grids =3D 4, + .max_brightness =3D 8, + .init =3D tm1650_init, + .data =3D tm1650_data, +}; + +static const struct tm16xx_controller fd655_controller =3D { + .max_grids =3D 5, + .max_brightness =3D 3, + .init =3D fd655_init, + .data =3D fd655_data, +}; + +static const struct tm16xx_controller fd6551_controller =3D { + .max_grids =3D 5, + .max_brightness =3D 8, + .init =3D fd6551_init, + .data =3D fd655_data, +}; + +static const struct tm16xx_controller hbs658_controller =3D { + .max_grids =3D 5, + .max_brightness =3D 8, + .init =3D hbs658_init, + .data =3D hbs658_data, +}; + +/** + * tm16xx_ascii_to_segments - Convert ASCII character to segment pattern + * @display: Pointer to tm16xx_display structure + * @c: ASCII character to convert + * + * Return: Segment pattern for the given ASCII character + */ +static u8 tm16xx_ascii_to_segments(struct tm16xx_display *display, char c) +{ + u8 standard_segments, mapped_segments =3D 0; + int i; + + standard_segments =3D map_to_seg7(&map_seg7, c); + + for (i =3D 0; i < DIGIT_SEGMENTS; i++) { + if (standard_segments & BIT(i)) + mapped_segments |=3D BIT(display->segment_mapping[i]); + } + + return mapped_segments; +} + +/** + * tm16xx_display_flush_init - Work function to update controller configur= ation (mode and brightness) + * @work: Pointer to work_struct + */ +static void tm16xx_display_flush_init(struct work_struct *work) +{ + struct tm16xx_display *display =3D + container_of(work, struct tm16xx_display, flush_init); + int ret; + + if (display->controller->init) { + mutex_lock(&display->lock); + ret =3D display->controller->init(display); + display->flush_status =3D ret; + mutex_unlock(&display->lock); + if (ret < 0) + dev_err(display->dev, "Failed to set brightness: %d\n", ret); + } +} + +/** + * tm16xx_display_flush_data - Work function to update display data + * @work: Pointer to work_struct + */ +static void tm16xx_display_flush_data(struct work_struct *work) +{ + struct tm16xx_display *display =3D + container_of(work, struct tm16xx_display, flush_display); + int i, ret =3D 0; + + mutex_lock(&display->lock); + + if (display->controller->data) { + for (i =3D 0; i < display->display_data_len; i++) { + ret =3D display->controller->data(display, i, + display->display_data[i]); + if (ret < 0) { + dev_err(display->dev, + "Failed to write display data: %d\n", ret); + break; + } + } + } + + display->flush_status =3D ret; + mutex_unlock(&display->lock); +} + +/** + * tm16xx_display_flush_data_transposed - Transposed flush work function + * @work: Pointer to work_struct + */ +static void tm16xx_display_flush_data_transposed(struct work_struct *work) +{ + struct tm16xx_display *display =3D + container_of(work, struct tm16xx_display, flush_display); + int i, j, ret =3D 0; + u8 transposed_data; + + mutex_lock(&display->lock); + + if (display->controller->data) { + /* Write operations based on number of segments */ + for (i =3D MIN_SEGMENT; i <=3D MAX_SEGMENT; i++) { + /* Gather bits from each grid for this segment */ + transposed_data =3D 0; + for (j =3D 0; j < display->display_data_len; j++) { + if (display->display_data[j] & BIT(i)) + transposed_data |=3D BIT(MAX_SEGMENT - j); + } + + ret =3D display->controller->data(display, i, transposed_data); + if (ret < 0) { + dev_err(display->dev, + "Failed to write transposed data: %d\n", ret); + break; + } + } + } + + display->flush_status =3D ret; + mutex_unlock(&display->lock); +} + +/** + * tm16xx_display_remove - Remove the display + * @display: Pointer to tm16xx_display structure + */ +static void tm16xx_display_remove(struct tm16xx_display *display) +{ + memset(display->display_data, 0x00, display->display_data_len); + schedule_work(&display->flush_display); + flush_work(&display->flush_display); + + display->main_led.brightness =3D LED_OFF; + schedule_work(&display->flush_init); + flush_work(&display->flush_init); + + dev_info(display->dev, "Display turned off\n"); +} + +/** + * tm16xx_brightness_set - Set brightness of the display + * @led_cdev: Pointer to led_classdev + * @brightness: Brightness value to set + */ +static void tm16xx_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + + led_cdev->brightness =3D brightness; + schedule_work(&display->flush_init); +} + +/** + * tm16xx_led_set - Set state of an individual LED + * @led_cdev: Pointer to led_classdev + * @value: Value to set (on/off) + */ +static void tm16xx_led_set(struct led_classdev *led_cdev, enum led_brightn= ess value) +{ + struct tm16xx_led *led =3D container_of(led_cdev, struct tm16xx_led, cdev= ); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + + if (value) + display->display_data[led->grid] |=3D (1 << led->segment); + else + display->display_data[led->grid] &=3D ~(1 << led->segment); + + schedule_work(&display->flush_display); +} + +/** + * tm16xx_value_show - Show current display value + * @dev: Pointer to device structure + * @attr: Pointer to device attribute structure + * @buf: Buffer to write the display value + * + * Return: Number of bytes written to buffer + */ +static ssize_t tm16xx_value_show(struct device *dev, struct device_attribu= te *attr, + char *buf) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + int i; + + for (i =3D 0; i < display->num_digits && i < PAGE_SIZE - 1; i++) + buf[i] =3D display->digits[i].value; + + buf[i++] =3D '\n'; + + return i; +} + +/** + * tm16xx_value_store - Store new display value + * @dev: Pointer to device structure + * @attr: Pointer to device attribute structure + * @buf: Buffer containing the new display value + * @count: Number of bytes in buffer + * + * Return: Number of bytes written or negative error code + */ +static ssize_t tm16xx_value_store(struct device *dev, struct device_attrib= ute *attr, + const char *buf, size_t count) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + struct tm16xx_digit *digit; + int i; + u8 data; + + for (i =3D 0; i < display->num_digits; i++) { + digit =3D &display->digits[i]; + + if (i < count && buf[i] !=3D '\n') { + digit->value =3D buf[i]; + data =3D tm16xx_ascii_to_segments(display, digit->value); + } else { + digit->value =3D 0; + data =3D 0; + } + + display->display_data[digit->grid] =3D + (display->display_data[digit->grid] & ~display->digit_bitmask) | + (data & display->digit_bitmask); + } + + schedule_work(&display->flush_display); + + return count; +} + +/** + * tm16xx_num_digits_show - Show the number of digits in the display + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The output buffer + * + * This function returns the number of digits in the display. + * + * Return: Number of bytes written to buf + */ +static ssize_t tm16xx_num_digits_show(struct device *dev, struct device_at= tribute *attr, + char *buf) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + + return sprintf(buf, "%d\n", display->num_digits); +} + +static int tm16xx_parse_int_array(const char *buf, int **array) +{ + int *values, value, count =3D 0, len; + const char *ptr =3D buf; + + while (sscanf(ptr, "%d %n", &value, &len) =3D=3D 1) { + count++; + ptr +=3D len; + } + + if (count =3D=3D 0) { + *array =3D NULL; + return 0; + } + + values =3D kmalloc(count * sizeof(*values), GFP_KERNEL); + if (!values) + return -ENOMEM; + + ptr =3D buf; + count =3D 0; + while (sscanf(ptr, "%d %n", &value, &len) =3D=3D 1) { + values[count++] =3D value; + ptr +=3D len; + } + + *array =3D values; + return count; +} + +/** + * tm16xx_segments_show - Show the current segment mapping + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The output buffer + * + * This function returns the current segment mapping of the display. + * + * Return: Number of bytes written to buf + */ +static ssize_t tm16xx_segments_show(struct device *dev, struct device_attr= ibute *attr, + char *buf) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + int i, count =3D 0; + + for (i =3D 0; i < DIGIT_SEGMENTS; i++) + count +=3D sprintf(buf + count, "%d ", display->segment_mapping[i]); + + count +=3D sprintf(buf + count, "\n"); + + return count; +} + +/** + * tm16xx_segments_store - Set a new segment mapping + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The input buffer + * @count: Number of bytes in buf + * + * This function sets a new segment mapping for the display. + * It validates that each value is within the valid range, and that + * the number of received values matches the number of segments. + * + * Return: count on success, negative errno on failure + */ +static ssize_t tm16xx_segments_store(struct device *dev, struct device_att= ribute *attr, + const char *buf, size_t count) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + int *array, ret, i; + + ret =3D tm16xx_parse_int_array(buf, &array); + if (ret < 0) + return ret; + + if (ret !=3D DIGIT_SEGMENTS) { + kfree(array); + return -EINVAL; + } + + for (i =3D 0; i < DIGIT_SEGMENTS; i++) { + if (array[i] < MIN_SEGMENT || array[i] > MAX_SEGMENT) { + kfree(array); + return -EINVAL; + } + } + + display->digit_bitmask =3D 0; + for (i =3D 0; i < DIGIT_SEGMENTS; i++) { + display->segment_mapping[i] =3D (u8)array[i]; + display->digit_bitmask |=3D BIT(display->segment_mapping[i]); + } + + kfree(array); + return count; +} + +/** + * tm16xx_digits_show - Show the current digit ordering + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The output buffer + * + * This function returns the current ordering of digits in the display. + * + * Return: Number of bytes written to buf + */ +static ssize_t tm16xx_digits_show(struct device *dev, struct device_attrib= ute *attr, + char *buf) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + int i, count =3D 0; + + for (i =3D 0; i < display->num_digits; i++) + count +=3D sprintf(buf + count, "%d ", display->digits[i].grid); + + count +=3D sprintf(buf + count, "\n"); + + return count; +} + +/** + * tm16xx_digits_store - Set a new digit ordering + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The input buffer + * @count: Number of bytes in buf + * + * This function sets a new ordering of digits for the display. + * It validates that all values match the original digit grid indexes, + * and that the number of received values matches the number of digits. + * + * Return: count on success, negative errno on failure + */ +static ssize_t tm16xx_digits_store(struct device *dev, struct device_attri= bute *attr, + const char *buf, size_t count) +{ + struct led_classdev *led_cdev =3D dev_get_drvdata(dev); + struct tm16xx_display *display =3D dev_get_drvdata(led_cdev->dev->parent); + int *array, ret, i, j; + bool found; + + ret =3D tm16xx_parse_int_array(buf, &array); + if (ret < 0) + return ret; + + if (ret !=3D display->num_digits) { + kfree(array); + return -EINVAL; + } + + for (i =3D 0; i < display->num_digits; i++) { + found =3D false; + + for (j =3D 0; j < display->num_digits; j++) { + if (display->digits[i].grid =3D=3D array[j]) { + found =3D true; + break; + } + } + + if (!found) { + kfree(array); + return -EINVAL; + } + } + + for (i =3D 0; i < display->num_digits; i++) + display->digits[i].grid =3D (u8)array[i]; + + kfree(array); + return count; +} + +/** + * tm16xx_map_seg7_show - Show the current 7-segment character map + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The output buffer + * + * This function returns the current 7-segment character map. + * + * Return: Number of bytes written to buf + */ +static ssize_t tm16xx_map_seg7_show(struct device *dev, struct device_attr= ibute *attr, + char *buf) +{ + memcpy(buf, &map_seg7, sizeof(map_seg7)); + return sizeof(map_seg7); +} + +/** + * tm16xx_map_seg7_store - Set a new 7-segment character map + * @dev: The device struct + * @attr: The device_attribute struct + * @buf: The input buffer + * @cnt: Number of bytes in buf + * + * This function sets a new 7-segment character map. + * + * Return: cnt on success, negative errno on failure + */ +static ssize_t tm16xx_map_seg7_store(struct device *dev, struct device_att= ribute *attr, + const char *buf, size_t cnt) +{ + if (cnt !=3D sizeof(map_seg7)) + return -EINVAL; + memcpy(&map_seg7, buf, cnt); + return cnt; +} + +// clang-format off +static DEVICE_ATTR(value, 0644, tm16xx_value_show, tm16xx_value_store); +static DEVICE_ATTR(num_digits, 0444, tm16xx_num_digits_show, NULL); +static DEVICE_ATTR(segments, 0644, tm16xx_segments_show, tm16xx_segments_s= tore); +static DEVICE_ATTR(digits, 0644, tm16xx_digits_show, tm16xx_digits_store); +static DEVICE_ATTR(map_seg7, 0644, tm16xx_map_seg7_show, tm16xx_map_seg7_s= tore); + +static struct attribute *tm16xx_main_led_attrs[] =3D { + &dev_attr_value.attr, + &dev_attr_num_digits.attr, + &dev_attr_segments.attr, + &dev_attr_digits.attr, + &dev_attr_map_seg7.attr, + NULL, +}; +ATTRIBUTE_GROUPS(tm16xx_main_led); +// clang-format on + +/** + * tm16xx_display_init - Initialize the display + * @display: Pointer to tm16xx_display structure + * + * Return: 0 on success, negative error code on failure + */ +static int tm16xx_display_init(struct tm16xx_display *display) +{ + schedule_work(&display->flush_init); + flush_work(&display->flush_init); + if (display->flush_status < 0) + return display->flush_status; + + if (default_value && strlen(default_value) > 0) { + tm16xx_value_store(display->main_led.dev, NULL, default_value, + strlen(default_value)); + } else { + memset(display->display_data, 0xFF, display->display_data_len); + schedule_work(&display->flush_display); + flush_work(&display->flush_display); + memset(display->display_data, 0x00, display->display_data_len); + if (display->flush_status < 0) + return display->flush_status; + } + + return 0; +} + +/** + * tm16xx_parse_dt - Parse device tree data + * @dev: Pointer to device structure + * @display: Pointer to tm16xx_display structure + * + * Return: 0 on success, negative error code on failure + */ +static int tm16xx_parse_dt(struct device *dev, struct tm16xx_display *disp= lay) +{ + struct fwnode_handle *child; + int ret, i, max_grid =3D 0; + u8 *digits; + + display->transpose_display_data =3D + device_property_read_bool(dev, "tm16xx,transposed"); + + ret =3D device_property_count_u8(dev, "tm16xx,digits"); + if (ret < 0) { + dev_err(dev, "Failed to count 'tm16xx,digits' property: %d\n", ret); + return ret; + } + + display->num_digits =3D ret; + dev_dbg(dev, "Number of digits: %d\n", display->num_digits); + + digits =3D devm_kcalloc(dev, display->num_digits, sizeof(*digits), GFP_KE= RNEL); + if (!digits) + return -ENOMEM; + + ret =3D device_property_read_u8_array(dev, "tm16xx,digits", digits, + display->num_digits); + if (ret < 0) { + dev_err(dev, "Failed to read 'tm16xx,digits' property: %d\n", ret); + return ret; + } + + display->digits =3D devm_kcalloc(dev, display->num_digits, sizeof(*displa= y->digits), + GFP_KERNEL); + if (!display->digits) + return -ENOMEM; + + for (i =3D 0; i < display->num_digits; i++) { + if (digits[i] >=3D display->controller->max_grids) { + dev_err(dev, "Digit grid %d exceeds controller max_grids %d\n", + digits[i], display->controller->max_grids); + return -EINVAL; + } + + display->digits[i].grid =3D digits[i]; + max_grid =3D umax(max_grid, digits[i]); + } + + devm_kfree(dev, digits); + + ret =3D device_property_read_u8_array(dev, "tm16xx,segment-mapping", + display->segment_mapping, DIGIT_SEGMENTS); + if (ret < 0) { + dev_err(dev, "Failed to read 'tm16xx,segment-mapping' property: %d\n", + ret); + return ret; + } + + display->digit_bitmask =3D 0; + for (i =3D 0; i < DIGIT_SEGMENTS; i++) { + if (display->segment_mapping[i] < MIN_SEGMENT || + display->segment_mapping[i] > MAX_SEGMENT) { + dev_err(dev, + "Invalid 'tm16xx,segment-mapping' value: %d (must be between %d and %d= )\n", + display->segment_mapping[i], MIN_SEGMENT, MAX_SEGMENT); + return -EINVAL; + } + + display->digit_bitmask |=3D BIT(display->segment_mapping[i]); + } + + display->num_leds =3D 0; + device_for_each_child_node(dev, child) { + u32 reg[2]; + + ret =3D fwnode_property_read_u32_array(child, "reg", reg, 2); + if (ret < 0) { + dev_err(dev, "Failed to read 'reg' property of led node: %d\n", + ret); + fwnode_handle_put(child); + return ret; + } + + if (reg[0] >=3D display->controller->max_grids) { + dev_err(dev, "LED grid %d exceeds controller max_grids %d\n", + reg[0], display->controller->max_grids); + fwnode_handle_put(child); + return -EINVAL; + } + + if (reg[1] < MIN_SEGMENT || reg[1] > MAX_SEGMENT) { + dev_err(dev, + "LED segment %d is invalid (must be between %d and %d)\n", + reg[1], MIN_SEGMENT, MAX_SEGMENT); + fwnode_handle_put(child); + return -EINVAL; + } + + max_grid =3D umax(max_grid, reg[0]); + display->num_leds++; + } + + dev_dbg(dev, "Number of LEDs: %d\n", display->num_leds); + + display->display_data_len =3D max_grid + 1; + dev_dbg(dev, "Number of display grids: %zu\n", display->display_data_len); + + display->display_data =3D devm_kcalloc(dev, display->display_data_len, + sizeof(*display->display_data), GFP_KERNEL); + if (!display->display_data) + return -ENOMEM; + + return 0; +} + +/** + * tm16xx_probe - Probe function for tm16xx devices + * @display: Pointer to tm16xx_display structure + * + * Return: 0 on success, negative error code on failure + */ +static int tm16xx_probe(struct tm16xx_display *display) +{ + struct device *dev =3D display->dev; + struct fwnode_handle *child; + int ret, i; + + ret =3D tm16xx_parse_dt(dev, display); + if (ret < 0) { + dev_err(dev, "Failed to parse device tree: %d\n", ret); + return ret; + } + + mutex_init(&display->lock); + INIT_WORK(&display->flush_init, tm16xx_display_flush_init); + + /* Initialize work structure with appropriate flush function */ + if (display->transpose_display_data) { + INIT_WORK(&display->flush_display, tm16xx_display_flush_data_transposed); + dev_info(display->dev, "Operating in transposed mode\n"); + } else { + INIT_WORK(&display->flush_display, tm16xx_display_flush_data); + } + + display->main_led.name =3D TM16XX_DEVICE_NAME; + display->main_led.brightness =3D display->controller->max_brightness; + display->main_led.max_brightness =3D display->controller->max_brightness; + display->main_led.brightness_set =3D tm16xx_brightness_set; + display->main_led.groups =3D tm16xx_main_led_groups; + display->main_led.flags =3D LED_RETAIN_AT_SHUTDOWN | LED_CORE_SUSPENDRESU= ME; + + ret =3D devm_led_classdev_register(dev, &display->main_led); + if (ret < 0) { + dev_err(dev, "Failed to register main LED: %d\n", ret); + return ret; + } + + display->leds =3D + devm_kcalloc(dev, display->num_leds, sizeof(*display->leds), GFP_KERNEL); + if (!display->leds) + return -ENOMEM; + + i =3D 0; + device_for_each_child_node(dev, child) { + struct tm16xx_led *led =3D &display->leds[i]; + struct led_init_data led_init =3D { + .fwnode =3D child, + .devicename =3D display->main_led.name, + .devname_mandatory =3D true, + }; + u32 reg[2]; + + ret =3D fwnode_property_read_u32_array(child, "reg", reg, 2); + if (ret < 0) { + fwnode_handle_put(child); + dev_err(dev, "Failed to read LED reg property: %d\n", ret); + return ret; + } + + led->grid =3D reg[0]; + led->segment =3D reg[1]; + + led->cdev.max_brightness =3D 1; + led->cdev.brightness_set =3D tm16xx_led_set; + led->cdev.flags =3D LED_RETAIN_AT_SHUTDOWN | LED_CORE_SUSPENDRESUME; + + ret =3D devm_led_classdev_register_ext(dev, &led->cdev, &led_init); + if (ret < 0) { + fwnode_handle_put(child); + dev_err(dev, "Failed to register LED %s: %d\n", led->cdev.name, + ret); + return ret; + } + + i++; + } + + ret =3D tm16xx_display_init(display); + if (ret < 0) { + dev_err(display->dev, "Failed to initialize display: %d\n", ret); + return ret; + } + + dev_info(display->dev, "Display initialized successfully\n"); + return 0; +} + +/* SPI specific code */ +static int tm16xx_spi_probe(struct spi_device *spi) +{ + const struct tm16xx_controller *controller; + struct tm16xx_display *display; + int ret; + + controller =3D of_device_get_match_data(&spi->dev); + if (!controller) + return -EINVAL; + + display =3D devm_kzalloc(&spi->dev, sizeof(*display), GFP_KERNEL); + if (!display) + return -ENOMEM; + + display->client.spi =3D spi; + display->dev =3D &spi->dev; + display->controller =3D controller; + + spi_set_drvdata(spi, display); + + ret =3D tm16xx_probe(display); + if (ret) + return ret; + + return 0; +} + +static void tm16xx_spi_remove(struct spi_device *spi) +{ + struct tm16xx_display *display =3D spi_get_drvdata(spi); + + tm16xx_display_remove(display); +} + +// clang-format off +static const struct of_device_id tm16xx_spi_of_match[] =3D { + { .compatible =3D "titanmec,tm1618", .data =3D &tm1618_controller }, + { .compatible =3D "titanmec,tm1620", .data =3D &tm1628_controller }, + { .compatible =3D "titanmec,tm1628", .data =3D &tm1628_controller }, + { .compatible =3D "fdhisi,fd620", .data =3D &tm1628_controller }, + { .compatible =3D "fdhisi,fd628", .data =3D &tm1628_controller }, + { .compatible =3D "icore,aip1618", .data =3D &tm1618_controller }, + { .compatible =3D "icore,aip1628", .data =3D &tm1628_controller }, + { .compatible =3D "princeton,pt6964", .data =3D &tm1628_controller }, + { .compatible =3D "winrise,hbs658", .data =3D &hbs658_controller }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, tm16xx_spi_of_match); + +static const struct spi_device_id tm16xx_spi_id[] =3D { + { "tm1618", 0 }, + { "tm1620", 0 }, + { "tm1628", 0 }, + { "fd620", 0 }, + { "fd628", 0 }, + { "aip1618", 0 }, + { "aip1628", 0 }, + { "pt6964", 0 }, + { "hbs658", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(spi, tm16xx_spi_id); +// clang-format on + +static struct spi_driver tm16xx_spi_driver =3D { + .driver =3D { + .name =3D TM16XX_DRIVER_NAME, + .of_match_table =3D tm16xx_spi_of_match, + }, + .probe =3D tm16xx_spi_probe, + .remove =3D tm16xx_spi_remove, + .shutdown =3D tm16xx_spi_remove, + .id_table =3D tm16xx_spi_id, +}; + +/* I2C specific code */ +static int tm16xx_i2c_probe(struct i2c_client *client) +{ + const struct tm16xx_controller *controller; + struct tm16xx_display *display; + int ret; + + controller =3D of_device_get_match_data(&client->dev); + if (!controller) + return -EINVAL; + + display =3D devm_kzalloc(&client->dev, sizeof(*display), GFP_KERNEL); + if (!display) + return -ENOMEM; + + display->client.i2c =3D client; + display->dev =3D &client->dev; + display->controller =3D controller; + + i2c_set_clientdata(client, display); + + ret =3D tm16xx_probe(display); + if (ret) + return ret; + + return 0; +} + +static void tm16xx_i2c_remove(struct i2c_client *client) +{ + struct tm16xx_display *display =3D i2c_get_clientdata(client); + + tm16xx_display_remove(display); +} + +// clang-format off +static const struct of_device_id tm16xx_i2c_of_match[] =3D { + { .compatible =3D "titanmec,tm1650", .data =3D &tm1650_controller }, + { .compatible =3D "icore,aip650", .data =3D &tm1650_controller }, + { .compatible =3D "fdhisi,fd650", .data =3D &tm1650_controller }, + { .compatible =3D "fdhisi,fd6551", .data =3D &fd6551_controller }, + { .compatible =3D "fdhisi,fd655", .data =3D &fd655_controller }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, tm16xx_i2c_of_match); + +static const struct i2c_device_id tm16xx_i2c_id[] =3D { + { "tm1650", 0 }, + { "aip650", 0 }, + { "fd650", 0 }, + { "fd6551", 0 }, + { "fd655", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(i2c, tm16xx_i2c_id); +// clang-format on + +static struct i2c_driver tm16xx_i2c_driver =3D { + .driver =3D { + .name =3D TM16XX_DRIVER_NAME, + .of_match_table =3D tm16xx_i2c_of_match, + }, + .probe =3D tm16xx_i2c_probe, + .remove =3D tm16xx_i2c_remove, + .shutdown =3D tm16xx_i2c_remove, + .id_table =3D tm16xx_i2c_id, +}; + +static int __init tm16xx_init(void) +{ + int ret; + + ret =3D spi_register_driver(&tm16xx_spi_driver); + if (ret) + return ret; + + ret =3D i2c_add_driver(&tm16xx_i2c_driver); + if (ret) { + spi_unregister_driver(&tm16xx_spi_driver); + return ret; + } + + return 0; +} + +static void __exit tm16xx_exit(void) +{ + i2c_del_driver(&tm16xx_i2c_driver); + spi_unregister_driver(&tm16xx_spi_driver); +} + +module_init(tm16xx_init); +module_exit(tm16xx_exit); + +MODULE_AUTHOR("Jean-Fran=C3=A7ois Lessard"); +MODULE_DESCRIPTION("TM16XX Compatible LED Display Controllers"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("spi:tm16xx"); +MODULE_ALIAS("i2c:tm16xx"); --=20 2.43.0 From nobody Wed Oct 8 10:56:34 2025 Received: from mail-qk1-f170.google.com (mail-qk1-f170.google.com [209.85.222.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3928C25B2E1; Sat, 28 Jun 2025 16:19:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[184.162.17.197]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7d44321fea0sm308592485a.83.2025.06.28.09.19.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 28 Jun 2025 09:19:07 -0700 (PDT) From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Lessard?= To: Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Geert Uytterhoeven , devicetree@vger.kernel.org, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Andreas=20F=C3=A4rber?= , Boris Gjenero , Christian Hewitt , Heiner Kallweit , Paolo Sabatino Subject: [PATCH 8/8] MAINTAINERS: Add entry for TM16xx driver Date: Sat, 28 Jun 2025 12:18:45 -0400 Message-ID: <20250628161850.38865-9-jefflessard3@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250628161850.38865-1-jefflessard3@gmail.com> References: <20250628161850.38865-1-jefflessard3@gmail.com> 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: quoted-printable Signed-off-by: Jean-Fran=C3=A7ois Lessard --- MAINTAINERS | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index efb51ee926..eee24ad0a8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -25047,6 +25047,12 @@ F: mm/memfd.c F: mm/shmem.c F: mm/shmem_quota.c =20 +TM16XX-COMPATIBLE LED CONTROLLERS DISPLAY DRIVER +M: Jean-Fran=C3=A7ois Lessard +S: Maintained +F: drivers/auxdisplay/tm16xx.c +F: Documentation/devicetree/bindings/auxdisplay/tm16xx.yaml + TOMOYO SECURITY MODULE M: Kentaro Takeda M: Tetsuo Handa --=20 2.43.0