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Mon, 17 Nov 2025 04:15:42 -0500 From: Antoniu Miclaus To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , Antoniu Miclaus , , , Subject: [PATCH v3 2/2] gpio: adg1712: add driver support Date: Mon, 17 Nov 2025 09:13:23 +0000 Message-ID: <20251117091427.3624-3-antoniu.miclaus@analog.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251117091427.3624-1-antoniu.miclaus@analog.com> References: <20251117091427.3624-1-antoniu.miclaus@analog.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: Ya8jVkzTGbejgvTWivOYcZx5maYVhh9N X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE3MDA3NyBTYWx0ZWRfX+jTaPdobFUyO yhSv29la9/9U7YrwXXk4g/IjxkZ05Pp7DPCko/v8GjP9bB1HTkqPSkrWKZBAx/COW3+nOxFrFoC 24t5tTKqQTJejr01KwZl5PE7Mi5FVWwt+JCXpgX1bQjeuXQ39OnyVcO69rBH+u3NODUbKlrbBpH BJ8vd4wjBeTu0wA1LsrvnJGK+SdMUY/+uzUo726aMLFixpC6uzanb6hCh9D9GuDkbDt2LdJPzLT 5cCO4L1JChXjWmVPZiwgoBjk8HOCDHb7HVE0n4Tcb5hNB/z8JAftXXozHu2UoqfYXYWOxTe+JQl RPoP/6Rsxy4d/mnvIAebOiXN7hujqDwzSFadnTbLuSbC16gNPXIrNyF7Y3YtK6/JymxVFBGIKOn H1XyFkpXozFwKi5NgdJtLXKnRkertQ== X-Authority-Analysis: v=2.4 cv=LJ9rgZW9 c=1 sm=1 tr=0 ts=691ae7c4 cx=c_pps a=PpDZqlmH/M8setHirZLBMw==:117 a=PpDZqlmH/M8setHirZLBMw==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=gAnH3GRIAAAA:8 a=1zQR8qqtwd6sJicix08A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-GUID: Ya8jVkzTGbejgvTWivOYcZx5maYVhh9N X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-17_02,2025-11-13_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 suspectscore=0 adultscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511170077 Add driver support for the ADG1712, which contains four independent single-pole/single-throw (SPST) switches and operates with a low-voltage single supply range from +1.08V to +5.5V or a low-voltage dual supply range from ±1.08V to ±2.75V. The driver configures switches once at probe time based on device tree properties and does not expose any userspace interface for runtime control. Signed-off-by: Antoniu Miclaus --- Changes in v3: - Remove GPIO controller interface - Configure switches from device tree at probe time only - Add 'switch-states' property parsing - Change from GPIOD_ASIS to GPIOD_OUT_LOW --- drivers/gpio/Kconfig | 9 ++++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-adg1712.c | 87 +++++++++++++++++++++++++++++++++++++ 3 files changed, 97 insertions(+) create mode 100644 drivers/gpio/gpio-adg1712.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 7ee3afbc2b05..3fac05823eae 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -157,6 +157,15 @@ config GPIO_74XX_MMIO 8 bits: 74244 (Input), 74273 (Output) 16 bits: 741624 (Input), 7416374 (Output) +config GPIO_ADG1712 + tristate "Analog Devices ADG1712 quad SPST switch GPIO driver" + depends on GPIOLIB + help + GPIO driver for Analog Devices ADG1712 quad single-pole, + single-throw (SPST) switch. The driver provides a GPIO controller + interface where each GPIO line controls one of the four independent + analog switches on the ADG1712. + config GPIO_ALTERA tristate "Altera GPIO" select GPIOLIB_IRQCHIP diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index ec296fa14bfd..9043d2d07a15 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -28,6 +28,7 @@ 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-$(CONFIG_GPIO_ADG1712) += gpio-adg1712.o obj-$(CONFIG_GPIO_ADNP) += gpio-adnp.o obj-$(CONFIG_GPIO_ADP5520) += gpio-adp5520.o obj-$(CONFIG_GPIO_ADP5585) += gpio-adp5585.o diff --git a/drivers/gpio/gpio-adg1712.c b/drivers/gpio/gpio-adg1712.c new file mode 100644 index 000000000000..86f8645cf2ad --- /dev/null +++ b/drivers/gpio/gpio-adg1712.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Analog Devices ADG1712 quad SPST switch driver + * + * Copyright 2025 Analog Devices Inc. + * + * Author: Antoniu Miclaus + */ + +#include +#include +#include +#include +#include +#include + +#define ADG1712_NUM_SWITCHES 4 + +struct adg1712 { + struct gpio_descs *switch_gpios; +}; + +static int adg1712_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct adg1712 *adg1712; + u32 switch_states[ADG1712_NUM_SWITCHES] = {0}; /* Default all switches off */ + int ret, i; + + adg1712 = devm_kzalloc(dev, sizeof(*adg1712), GFP_KERNEL); + if (!adg1712) + return -ENOMEM; + + adg1712->switch_gpios = devm_gpiod_get_array(dev, "switch", GPIOD_OUT_LOW); + if (IS_ERR(adg1712->switch_gpios)) + return dev_err_probe(dev, PTR_ERR(adg1712->switch_gpios), + "failed to get switch gpios\n"); + + if (adg1712->switch_gpios->ndescs != ADG1712_NUM_SWITCHES) + return dev_err_probe(dev, -EINVAL, + "expected %d gpios, got %d\n", + ADG1712_NUM_SWITCHES, + adg1712->switch_gpios->ndescs); + + ret = device_property_read_u32_array(dev, "switch-states", switch_states, + ADG1712_NUM_SWITCHES); + if (ret && ret != -EINVAL) + return dev_err_probe(dev, ret, "failed to read switch-states\n"); + + for (i = 0; i < ADG1712_NUM_SWITCHES; i++) { + if (switch_states[i] > 1) { + dev_warn(dev, "invalid switch state %u for switch %d, using 0\n", + switch_states[i], i); + switch_states[i] = 0; + } + + ret = gpiod_set_value_cansleep(adg1712->switch_gpios->desc[i], + switch_states[i]); + if (ret) + return dev_err_probe(dev, ret, "failed to set switch %d\n", i); + } + + platform_set_drvdata(pdev, adg1712); + + dev_info(dev, "ADG1712 switch controller configured\n"); + + return 0; +} + +static const struct of_device_id adg1712_dt_ids[] = { + { .compatible = "adi,adg1712", }, + { } +}; +MODULE_DEVICE_TABLE(of, adg1712_dt_ids); + +static struct platform_driver adg1712_driver = { + .driver = { + .name = "adg1712", + .of_match_table = adg1712_dt_ids, + }, + .probe = adg1712_probe, +}; +module_platform_driver(adg1712_driver); + +MODULE_DESCRIPTION("Analog Devices ADG1712 quad SPST switch driver"); +MODULE_AUTHOR("Antoniu Miclaus "); +MODULE_LICENSE("GPL"); -- 2.43.0