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Thu, 12 Sep 2024 18:20:15 +0000 (UTC) From: Arturs Artamonovs via B4 Relay Date: Thu, 12 Sep 2024 19:24:54 +0100 Subject: [PATCH 09/21] gpio: add driver for ADI ADSP-SC5xx platform Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240912-test-v1-9-458fa57c8ccf@analog.com> References: <20240912-test-v1-0-458fa57c8ccf@analog.com> In-Reply-To: <20240912-test-v1-0-458fa57c8ccf@analog.com> To: Catalin Marinas , Will Deacon , Greg Malysa , Philipp Zabel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Utsav Agarwal , Michael Turquette , Stephen Boyd , Linus Walleij , Bartosz Golaszewski , Thomas Gleixner , Andi Shyti , Greg Kroah-Hartman , Jiri Slaby , Arnd Bergmann , Olof Johansson , soc@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org, linux-serial@vger.kernel.org, Arturs Artamonovs , adsp-linux@analog.com, Arturs Artamonovs , Nathan Barrett-Morrison X-Mailer: b4 0.15-dev-7be4f X-Developer-Signature: v=1; a=ed25519-sha256; t=1726165513; l=6581; i=arturs.artamonovs@analog.com; s=20240909; h=from:subject:message-id; bh=sIIGNtLwPRf3aETR4KIKQxLT7TsNXZDYorDVrxz6kPU=; b=CuyIITaHzPiP638ncfNKDHNkpBfqHvmmcTvXrLK2YXfWUbPCGduwTVFTMgybu65hKq1KAP9Zl N73JQEXbShnCT5+hudPmH2qYIJ2d4MFvfvtIe3KNW39sM8vDeUDcuUV X-Developer-Key: i=arturs.artamonovs@analog.com; a=ed25519; pk=UXODIid/MrmBXvqkX4PeEfetDaNAw9xKMINHIc5oZCk= X-Endpoint-Received: by B4 Relay for arturs.artamonovs@analog.com/20240909 with auth_id=206 X-Original-From: Arturs Artamonovs Reply-To: arturs.artamonovs@analog.com From: Arturs Artamonovs Add ADSP-SC5xx GPIO driver. - Support all GPIO ports - Each gpio support seperate PINT interrupt controller Signed-off-by: Arturs Artamonovs Co-developed-by: Nathan Barrett-Morrison Signed-off-by: Nathan Barrett-Morrison Co-developed-by: Greg Malysa Signed-off-by: Greg Malysa --- drivers/gpio/Kconfig | 8 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-adi-adsp-port.c | 145 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 154 insertions(+) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 58f43bcced7c1f29fad5960771817f500ef67ce1..b02693f5b4cec95a59f19aa1bacf7ed72236865a 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -147,6 +147,14 @@ config GPIO_74XX_MMIO 8 bits: 74244 (Input), 74273 (Output) 16 bits: 741624 (Input), 7416374 (Output) +config GPIO_ADI_ADSP_PORT + bool "ADI ADSP PORT GPIO driver" + depends on OF_GPIO + select GPIO_GENERIC + help + Say Y to enable the ADSP PORT-based GPIO driver for Analog Devices + ADSP chips. + config GPIO_ALTERA tristate "Altera GPIO" depends on OF_GPIO diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 64dd6d9d730d5a22564821df71375113e31fe057..fb02c7807a674c8a38d1128e6a25bb7c7f1f4aab 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-$(CONFIG_GPIO_ADI_ADSP_PORT) += gpio-adi-adsp-port.o obj-$(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-adi-adsp-port.c b/drivers/gpio/gpio-adi-adsp-port.c new file mode 100644 index 0000000000000000000000000000000000000000..a7a1867495bbdd121cda9b99991865a035dfa117 --- /dev/null +++ b/drivers/gpio/gpio-adi-adsp-port.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADSP PORT gpio driver + * + * (C) Copyright 2022-2024 - Analog Devices, Inc. + */ + +#include +#include +#include +#include +#include +#include "gpiolib.h" + +static int adsp_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) +{ + struct adsp_gpio_port *port = to_adsp_gpio_port(chip); + + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_CLEAR); + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_SET); + return 0; +} + +static int adsp_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct adsp_gpio_port *port = to_adsp_gpio_port(chip); + + /* + * For open drain ports, they've already been configured by pinctrl and + * we should not modify their output characteristics + */ + if (port->open_drain & BIT(offset)) + return 0; + + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_CLEAR); + + if (value) + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_SET); + else + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_CLEAR); + + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_SET); + return 0; +} + +static void adsp_gpio_set_value(struct gpio_chip *chip, unsigned int offset, int value) +{ + struct adsp_gpio_port *port = to_adsp_gpio_port(chip); + + /* + * For open drain ports, set as input if driving a 1, set as output + * if driving a 0 + */ + if (port->open_drain & BIT(offset)) { + if (value) { + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_CLEAR); + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_SET); + } else { + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_INEN_CLEAR); + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_CLEAR); + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DIR_SET); + } + } else { + if (value) + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_SET); + else + __adsp_gpio_writew(port, BIT(offset), ADSP_PORT_REG_DATA_CLEAR); + } +} + +static int adsp_gpio_get_value(struct gpio_chip *chip, unsigned int offset) +{ + struct adsp_gpio_port *port = to_adsp_gpio_port(chip); + + return !!(__adsp_gpio_readw(port, ADSP_PORT_REG_DATA) & BIT(offset)); +} + +static int adsp_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) +{ + struct adsp_gpio_port *port = to_adsp_gpio_port(chip); + irq_hw_number_t irq = offset + port->irq_offset; + int map = irq_find_mapping(port->irq_domain, irq); + + if (map) + return map; + + return irq_create_mapping(port->irq_domain, irq); +} + +static int adsp_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct adsp_gpio_port *gpio; + int ret; + + gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + gpio->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(gpio->regs)) + return PTR_ERR(gpio->regs); + + gpio->dev = dev; + + ret = adsp_attach_pint_to_gpio(gpio); + if (ret) + dev_err_probe(gpio->dev, ret, "error attaching interupt to gpio pin\n"); + + spin_lock_init(&gpio->lock); + + gpio->gpio.label = "adsp-gpio"; + gpio->gpio.direction_input = adsp_gpio_direction_input; + gpio->gpio.direction_output = adsp_gpio_direction_output; + gpio->gpio.get = adsp_gpio_get_value; + gpio->gpio.set = adsp_gpio_set_value; + gpio->gpio.to_irq = adsp_gpio_to_irq; + gpio->gpio.request = gpiochip_generic_request; + gpio->gpio.free = gpiochip_generic_free; + gpio->gpio.ngpio = ADSP_PORT_NGPIO; + gpio->gpio.parent = dev; + gpio->gpio.base = -1; + return devm_gpiochip_add_data(dev, &gpio->gpio, gpio); +} + +static const struct of_device_id adsp_gpio_of_match[] = { + { .compatible = "adi,adsp-port-gpio", }, + { }, +}; +MODULE_DEVICE_TABLE(of, adsp_gpio_of_match); + +static struct platform_driver adsp_gpio_driver = { + .driver = { + .name = "adsp-port-gpio", + .of_match_table = adsp_gpio_of_match, + }, + .probe = adsp_gpio_probe, +}; + +module_platform_driver(adsp_gpio_driver); + +MODULE_AUTHOR("Greg Malysa "); +MODULE_DESCRIPTION("Analog Devices GPIO driver"); +MODULE_LICENSE("GPL v2"); \ No newline at end of file