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Sun, 21 Jan 2024 05:35:20 -0500 From: Kim Seer Paller To: , , CC: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "Kim Seer Paller" Subject: [PATCH 1/2] dt-bindings: gpio: add adg1414 Date: Sun, 21 Jan 2024 18:35:04 +0800 Message-ID: <20240121103505.26475-2-kimseer.paller@analog.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240121103505.26475-1-kimseer.paller@analog.com> References: <20240121103505.26475-1-kimseer.paller@analog.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: kAOBvFXmOQa-zG3sBzaJ4kPPc1M1i7WJ X-Proofpoint-ORIG-GUID: kAOBvFXmOQa-zG3sBzaJ4kPPc1M1i7WJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-20_06,2024-01-19_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxlogscore=999 malwarescore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401210082 The ADG1414 is a 9.5 Ω RON ±15 V/+12 V/±5 V iCMOS Serially-Controlled Octal SPST Switches Signed-off-by: Kim Seer Paller --- .../bindings/gpio/gpio-adg1414.yaml | 66 +++++++++++++++++++ MAINTAINERS | 6 ++ 2 files changed, 72 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml diff --git a/Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml b/Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml new file mode 100644 index 000000000..24a51e79f --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml @@ -0,0 +1,66 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/gpio-adg1414.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ADG1414 SPST Switch Driver + +maintainers: + - Kim Seer Paller + +description: + The ADG1414 is a 9.5 Ω RON ±15 V/+12 V/±5 V iCMOS serially-controlled + octal SPST switches. + +properties: + compatible: + enum: + - adi,adg1414 + + reg: + maxItems: 1 + + gpio-controller: true + + '#gpio-cells': + const: 2 + + spi-cpha: true + + reset-gpios: + description: GPIO specifier that resets the device. + maxItems: 1 + + '#daisy-chained-devices': + description: The number of daisy-chained devices. + default: 1 + minimum: 1 + maximum: 4 + +required: + - compatible + - reg + - spi-cpha + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + spi { + #address-cells = <1>; + #size-cells = <0>; + + gpio@0 { + compatible = "adi,adg1414"; + reg = <0>; + spi-max-frequency = <1000000>; + spi-cpha; + reset-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index 8d1052fa6..526145e69 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -461,6 +461,12 @@ W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/net/ieee802154/adf7242.txt F: drivers/net/ieee802154/adf7242.c +ADG1414 SPST Switch Driver +M: Kim Seer Paller +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml + ADM1025 HARDWARE MONITOR DRIVER M: Jean Delvare L: linux-hwmon@vger.kernel.org From patchwork Sun Jan 21 10:35:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Kim Seer Paller X-Patchwork-Id: 764915 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 74B5B36B00; 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Sun, 21 Jan 2024 05:35:28 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Sun, 21 Jan 2024 05:35:28 -0500 Received: from kim-VirtualBox.ad.analog.com (KPALLER2-L03.ad.analog.com [10.116.242.67]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 40LAZAof021011; Sun, 21 Jan 2024 05:35:23 -0500 From: Kim Seer Paller To: , , CC: Linus Walleij , Bartosz Golaszewski , Rob Herring , Krzysztof Kozlowski , Conor Dooley , "Kim Seer Paller" Subject: [PATCH 2/2] gpio: gpio-adg1414: New driver Date: Sun, 21 Jan 2024 18:35:05 +0800 Message-ID: <20240121103505.26475-3-kimseer.paller@analog.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240121103505.26475-1-kimseer.paller@analog.com> References: <20240121103505.26475-1-kimseer.paller@analog.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: n7xPRH64Yqg_pLCV_UZII8v7YDAwOTKm X-Proofpoint-ORIG-GUID: n7xPRH64Yqg_pLCV_UZII8v7YDAwOTKm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-20_06,2024-01-19_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 bulkscore=0 spamscore=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxlogscore=999 malwarescore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401210082 The ADG1414 is a 9.5 Ω RON ±15 V/+12 V/±5 V iCMOS Serially-Controlled Octal SPST Switches Signed-off-by: Kim Seer Paller --- MAINTAINERS | 1 + drivers/gpio/Kconfig | 10 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-adg1414.c | 141 ++++++++++++++++++++++++++++++++++++ 4 files changed, 153 insertions(+) create mode 100644 drivers/gpio/gpio-adg1414.c diff --git a/MAINTAINERS b/MAINTAINERS index 526145e69..254ba7ea5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -466,6 +466,7 @@ M: Kim Seer Paller S: Supported W: https://ez.analog.com/linux-software-drivers F: Documentation/devicetree/bindings/gpio/gpio-adg1414.yaml +F: drivers/gpio/gpio-adg1414.c ADM1025 HARDWARE MONITOR DRIVER M: Jean Delvare diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 1301cec94..25d467d70 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1728,6 +1728,16 @@ config GPIO_74X164 shift registers. This driver can be used to provide access to more GPIO outputs. +config GPIO_ADG1414 + tristate "ADG1414 SPST Switch Driver" + depends on SPI + help + Say yes here to build support for Analog Devices ADG1414 SPST + Switch Driver + + To compile this driver as a module, choose M here: the + module will be called gpio-adg1414. + config GPIO_MAX3191X tristate "Maxim MAX3191x industrial serializer" select CRC8 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 9e40af196..9ab45d128 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_GPIO_104_IDI_48) += gpio-104-idi-48.o obj-$(CONFIG_GPIO_104_IDIO_16) += gpio-104-idio-16.o obj-$(CONFIG_GPIO_74X164) += gpio-74x164.o obj-$(CONFIG_GPIO_74XX_MMIO) += gpio-74xx-mmio.o +obj-$(CONFIG_GPIO_ADG1414) += gpio-adg1414.o obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o obj-$(CONFIG_GPIO_AGGREGATOR) += gpio-aggregator.o diff --git a/drivers/gpio/gpio-adg1414.c b/drivers/gpio/gpio-adg1414.c new file mode 100644 index 000000000..6c0830ee2 --- /dev/null +++ b/drivers/gpio/gpio-adg1414.c @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADG1414 SPST Switch Driver + * + * Copyright 2024 Analog Devices Inc. + */ + +#include +#include +#include +#include +#include +#include + +#define ADG1414_MAX_DEVICES 4 + +struct adg1414_state { + struct spi_device *spi; + struct gpio_chip chip; + struct mutex lock; /* protect sensor state */ + u32 buf; + + __be32 tx __aligned(ARCH_DMA_MINALIGN); +}; + +static void adg1414_set(struct gpio_chip *chip, + unsigned int offset, + int value) +{ + struct adg1414_state *st = gpiochip_get_data(chip); + int ret; + + struct spi_transfer xfer = { + .tx_buf = &st->tx, + .len = st->chip.ngpio / 8, + }; + + mutex_lock(&st->lock); + + if (value) + st->buf |= BIT(offset); + else + st->buf &= ~BIT(offset); + + st->tx = cpu_to_be32(st->buf << (32 - st->chip.ngpio)); + + ret = spi_sync_transfer(st->spi, &xfer, 1); + if (ret) + goto out; + +out: + mutex_unlock(&st->lock); +} + +static int adg1414_get(struct gpio_chip *chip, + unsigned int offset) +{ + struct adg1414_state *st = gpiochip_get_data(chip); + int value; + + mutex_lock(&st->lock); + + value = st->buf & BIT(offset); + + mutex_unlock(&st->lock); + + return value; +} + +static int adg1414_get_direction(struct gpio_chip *chip, + unsigned int offset) +{ + return GPIO_LINE_DIRECTION_OUT; +} + +static int adg1414_probe(struct spi_device *spi) +{ + struct adg1414_state *st; + struct gpio_desc *reset; + struct device *dev = &spi->dev; + u32 num_devices; + int ret; + + st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL); + if (!st) + return -ENOMEM; + + st->spi = spi; + + /* Use reset pin to reset the device */ + reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(reset)) + return dev_err_probe(dev, PTR_ERR(reset), + "Failed to get reset gpio"); + + if (reset) { + fsleep(1); + gpiod_set_value_cansleep(reset, 0); + } + + num_devices = 1; + ret = device_property_read_u32(dev, "#daisy-chained-devices", + &num_devices); + if (!ret) { + if (!num_devices || num_devices > ADG1414_MAX_DEVICES) + return dev_err_probe(dev, ret, + "Failed to get daisy-chained-devices property\n"); + } + + st->chip.label = "adg1414"; + st->chip.parent = dev; + st->chip.get_direction = adg1414_get_direction; + st->chip.set = adg1414_set; + st->chip.get = adg1414_get; + st->chip.base = -1; + st->chip.ngpio = num_devices * 8; + st->chip.can_sleep = true; + + mutex_init(&st->lock); + + return devm_gpiochip_add_data(dev, &st->chip, st); +} + +static const struct of_device_id adg1414_of_match[] = { + { .compatible = "adi,adg1414" }, + { } +}; +MODULE_DEVICE_TABLE(of, adg1414_of_match); + +static struct spi_driver adg1414_driver = { + .driver = { + .name = "adg1414", + .of_match_table = adg1414_of_match, + }, + .probe = adg1414_probe, +}; +module_spi_driver(adg1414_driver); + +MODULE_AUTHOR("Kim Seer Paller "); +MODULE_DESCRIPTION("ADG1414 SPST Switch Driver"); +MODULE_LICENSE("GPL");