From: Felix Fietkau <nbd@nbd.name> To: linux-arm-kernel@lists.infradead.org, Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl> Cc: john@phrozen.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org Subject: [PATCH v6 13/14] gpio: Add support for Airoha EN7523 GPIO controller Date: Fri, 3 Dec 2021 12:33:30 +0100 [thread overview] Message-ID: <20211203113331.20510-14-nbd@nbd.name> (raw) In-Reply-To: <20211203113331.20510-1-nbd@nbd.name> From: John Crispin <john@phrozen.org> Airoha's GPIO controller on their ARM EN7523 SoCs consists of two banks of 32 GPIOs. Each instance in DT is for a single bank. Signed-off-by: John Crispin <john@phrozen.org> Signed-off-by: Felix Fietkau <nbd@nbd.name> --- drivers/gpio/Kconfig | 9 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-en7523.c | 134 +++++++++++++++++++++++++++++++++++++ 3 files changed, 144 insertions(+) create mode 100644 drivers/gpio/gpio-en7523.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 072ed610f9c6..e4a34272504f 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -247,6 +247,15 @@ config GPIO_EM help Say yes here to support GPIO on Renesas Emma Mobile SoCs. +config GPIO_EN7523 + tristate "Airoha GPIO support" + depends on ARCH_AIROHA + default ARCH_AIROHA + select GPIO_GENERIC + select GPIOLIB_IRQCHIP + help + Say yes here to support the GPIO controller on Airoha EN7523. + config GPIO_EP93XX def_bool y depends on ARCH_EP93XX diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 71ee9fc2ff83..d2269ee0948e 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o obj-$(CONFIG_GPIO_EIC_SPRD) += gpio-eic-sprd.o obj-$(CONFIG_GPIO_EM) += gpio-em.o +obj-$(CONFIG_GPIO_EN7523) += gpio-en7523.o obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o obj-$(CONFIG_GPIO_EXAR) += gpio-exar.o obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o diff --git a/drivers/gpio/gpio-en7523.c b/drivers/gpio/gpio-en7523.c new file mode 100644 index 000000000000..07770c5a4101 --- /dev/null +++ b/drivers/gpio/gpio-en7523.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/gpio/driver.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/property.h> + +#define AIROHA_GPIO_MAX 32 + +/** + * airoha_gpio_ctrl - Airoha GPIO driver data + * + * @gc: Associated gpio_chip instance. + * @data: The data register. + * @dir0: The direction register for the lower 16 pins. + * @dir1: The direction register for the higher 16 pins. + * @output: The output enable register. + */ +struct airoha_gpio_ctrl { + struct gpio_chip gc; + void __iomem *data; + void __iomem *dir[2]; + void __iomem *output; +}; + +static struct airoha_gpio_ctrl *gc_to_ctrl(struct gpio_chip *gc) +{ + return container_of(gc, struct airoha_gpio_ctrl, gc); +} + +static int airoha_dir_set(struct gpio_chip *gc, unsigned int gpio, + int val, int out) +{ + struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc); + u32 dir = ioread32(ctrl->dir[gpio / 16]); + u32 output = ioread32(ctrl->output); + u32 mask = BIT((gpio % 16) * 2); + + if (out) { + dir |= mask; + output |= BIT(gpio); + } else { + dir &= ~mask; + output &= ~BIT(gpio); + } + + iowrite32(dir, ctrl->dir[gpio / 16]); + iowrite32(output, ctrl->output); + + if (out) + gc->set(gc, gpio, val); + + return 0; +} + +static int airoha_dir_out(struct gpio_chip *gc, unsigned int gpio, + int val) +{ + return airoha_dir_set(gc, gpio, val, 1); +} + +static int airoha_dir_in(struct gpio_chip *gc, unsigned int gpio) +{ + return airoha_dir_set(gc, gpio, 0, 0); +} + +static int airoha_get_dir(struct gpio_chip *gc, unsigned int gpio) +{ + struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc); + u32 dir = ioread32(ctrl->dir[gpio / 16]); + u32 mask = BIT((gpio % 16) * 2); + + return dir & mask; +} + +static const struct of_device_id airoha_gpio_of_match[] = { + { .compatible = "airoha,en7523-gpio" }, + { } +}; +MODULE_DEVICE_TABLE(of, airoha_gpio_of_match); + +static int airoha_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct airoha_gpio_ctrl *ctrl; + int err; + + ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return -ENOMEM; + + ctrl->data = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ctrl->data)) + return PTR_ERR(ctrl->data); + + ctrl->dir[0] = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(ctrl->dir[0])) + return PTR_ERR(ctrl->dir[0]); + + ctrl->dir[1] = devm_platform_ioremap_resource(pdev, 2); + if (IS_ERR(ctrl->dir[1])) + return PTR_ERR(ctrl->dir[1]); + + ctrl->output = devm_platform_ioremap_resource(pdev, 3); + if (IS_ERR(ctrl->output)) + return PTR_ERR(ctrl->output); + + err = bgpio_init(&ctrl->gc, dev, 4, ctrl->data, NULL, + NULL, NULL, NULL, 0); + if (err) + return dev_err_probe(dev, err, "unable to init generic GPIO"); + + ctrl->gc.ngpio = AIROHA_GPIO_MAX; + ctrl->gc.owner = THIS_MODULE; + ctrl->gc.direction_output = airoha_dir_out; + ctrl->gc.direction_input = airoha_dir_in; + ctrl->gc.get_direction = airoha_get_dir; + + return devm_gpiochip_add_data(dev, &ctrl->gc, ctrl); +} + +static struct platform_driver airoha_gpio_driver = { + .driver = { + .name = "airoha-gpio", + .of_match_table = airoha_gpio_of_match, + }, + .probe = airoha_gpio_probe, +}; +module_platform_driver(airoha_gpio_driver); + +MODULE_DESCRIPTION("Airoha GPIO support"); +MODULE_AUTHOR("John Crispin <john@phrozen.org>"); +MODULE_LICENSE("GPL v2"); -- 2.30.1
WARNING: multiple messages have this Message-ID (diff)
From: Felix Fietkau <nbd@nbd.name> To: linux-arm-kernel@lists.infradead.org, Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <brgl@bgdev.pl> Cc: john@phrozen.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org Subject: [PATCH v6 13/14] gpio: Add support for Airoha EN7523 GPIO controller Date: Fri, 3 Dec 2021 12:33:30 +0100 [thread overview] Message-ID: <20211203113331.20510-14-nbd@nbd.name> (raw) In-Reply-To: <20211203113331.20510-1-nbd@nbd.name> From: John Crispin <john@phrozen.org> Airoha's GPIO controller on their ARM EN7523 SoCs consists of two banks of 32 GPIOs. Each instance in DT is for a single bank. Signed-off-by: John Crispin <john@phrozen.org> Signed-off-by: Felix Fietkau <nbd@nbd.name> --- drivers/gpio/Kconfig | 9 +++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-en7523.c | 134 +++++++++++++++++++++++++++++++++++++ 3 files changed, 144 insertions(+) create mode 100644 drivers/gpio/gpio-en7523.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 072ed610f9c6..e4a34272504f 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -247,6 +247,15 @@ config GPIO_EM help Say yes here to support GPIO on Renesas Emma Mobile SoCs. +config GPIO_EN7523 + tristate "Airoha GPIO support" + depends on ARCH_AIROHA + default ARCH_AIROHA + select GPIO_GENERIC + select GPIOLIB_IRQCHIP + help + Say yes here to support the GPIO controller on Airoha EN7523. + config GPIO_EP93XX def_bool y depends on ARCH_EP93XX diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 71ee9fc2ff83..d2269ee0948e 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o obj-$(CONFIG_GPIO_EIC_SPRD) += gpio-eic-sprd.o obj-$(CONFIG_GPIO_EM) += gpio-em.o +obj-$(CONFIG_GPIO_EN7523) += gpio-en7523.o obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o obj-$(CONFIG_GPIO_EXAR) += gpio-exar.o obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o diff --git a/drivers/gpio/gpio-en7523.c b/drivers/gpio/gpio-en7523.c new file mode 100644 index 000000000000..07770c5a4101 --- /dev/null +++ b/drivers/gpio/gpio-en7523.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/gpio/driver.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/property.h> + +#define AIROHA_GPIO_MAX 32 + +/** + * airoha_gpio_ctrl - Airoha GPIO driver data + * + * @gc: Associated gpio_chip instance. + * @data: The data register. + * @dir0: The direction register for the lower 16 pins. + * @dir1: The direction register for the higher 16 pins. + * @output: The output enable register. + */ +struct airoha_gpio_ctrl { + struct gpio_chip gc; + void __iomem *data; + void __iomem *dir[2]; + void __iomem *output; +}; + +static struct airoha_gpio_ctrl *gc_to_ctrl(struct gpio_chip *gc) +{ + return container_of(gc, struct airoha_gpio_ctrl, gc); +} + +static int airoha_dir_set(struct gpio_chip *gc, unsigned int gpio, + int val, int out) +{ + struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc); + u32 dir = ioread32(ctrl->dir[gpio / 16]); + u32 output = ioread32(ctrl->output); + u32 mask = BIT((gpio % 16) * 2); + + if (out) { + dir |= mask; + output |= BIT(gpio); + } else { + dir &= ~mask; + output &= ~BIT(gpio); + } + + iowrite32(dir, ctrl->dir[gpio / 16]); + iowrite32(output, ctrl->output); + + if (out) + gc->set(gc, gpio, val); + + return 0; +} + +static int airoha_dir_out(struct gpio_chip *gc, unsigned int gpio, + int val) +{ + return airoha_dir_set(gc, gpio, val, 1); +} + +static int airoha_dir_in(struct gpio_chip *gc, unsigned int gpio) +{ + return airoha_dir_set(gc, gpio, 0, 0); +} + +static int airoha_get_dir(struct gpio_chip *gc, unsigned int gpio) +{ + struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc); + u32 dir = ioread32(ctrl->dir[gpio / 16]); + u32 mask = BIT((gpio % 16) * 2); + + return dir & mask; +} + +static const struct of_device_id airoha_gpio_of_match[] = { + { .compatible = "airoha,en7523-gpio" }, + { } +}; +MODULE_DEVICE_TABLE(of, airoha_gpio_of_match); + +static int airoha_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct airoha_gpio_ctrl *ctrl; + int err; + + ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return -ENOMEM; + + ctrl->data = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ctrl->data)) + return PTR_ERR(ctrl->data); + + ctrl->dir[0] = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(ctrl->dir[0])) + return PTR_ERR(ctrl->dir[0]); + + ctrl->dir[1] = devm_platform_ioremap_resource(pdev, 2); + if (IS_ERR(ctrl->dir[1])) + return PTR_ERR(ctrl->dir[1]); + + ctrl->output = devm_platform_ioremap_resource(pdev, 3); + if (IS_ERR(ctrl->output)) + return PTR_ERR(ctrl->output); + + err = bgpio_init(&ctrl->gc, dev, 4, ctrl->data, NULL, + NULL, NULL, NULL, 0); + if (err) + return dev_err_probe(dev, err, "unable to init generic GPIO"); + + ctrl->gc.ngpio = AIROHA_GPIO_MAX; + ctrl->gc.owner = THIS_MODULE; + ctrl->gc.direction_output = airoha_dir_out; + ctrl->gc.direction_input = airoha_dir_in; + ctrl->gc.get_direction = airoha_get_dir; + + return devm_gpiochip_add_data(dev, &ctrl->gc, ctrl); +} + +static struct platform_driver airoha_gpio_driver = { + .driver = { + .name = "airoha-gpio", + .of_match_table = airoha_gpio_of_match, + }, + .probe = airoha_gpio_probe, +}; +module_platform_driver(airoha_gpio_driver); + +MODULE_DESCRIPTION("Airoha GPIO support"); +MODULE_AUTHOR("John Crispin <john@phrozen.org>"); +MODULE_LICENSE("GPL v2"); -- 2.30.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-12-03 11:57 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-12-03 11:33 [PATCH v6 00/14] Add support for Airoha EN7523 SoC Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 01/14] dt-bindings: Add vendor prefix for Airoha Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 02/14] dt-bindings: arm: airoha: Add binding for EN7523 SoC and EVB Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-10 20:48 ` Rob Herring 2021-12-10 20:48 ` Rob Herring 2021-12-03 11:33 ` [PATCH v6 03/14] ARM: dts: Add basic support for Airoha EN7523 Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 04/14] ARM: Add basic support for Airoha EN7523 SoC Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 05/14] ARM: multi_v7_defconfig: Add " Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 06/14] dt-bindings: Add en7523-scu device tree binding documentation Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-10 20:49 ` Rob Herring 2021-12-10 20:49 ` Rob Herring 2021-12-03 11:33 ` [PATCH v6 07/14] clk: en7523: Add clock driver for Airoha EN7523 SoC Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 08/14] ARM: dts: add clock support for Airoha EN7523 Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 09/14] dt-bindings: PCI: Add support for Airoha EN7532 Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 10/14] PCI: mediatek: allow selecting controller driver for airoha arch Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-06 20:11 ` Bjorn Helgaas 2021-12-06 20:11 ` Bjorn Helgaas 2021-12-06 20:11 ` Bjorn Helgaas 2021-12-03 11:33 ` [PATCH v6 11/14] ARM: dts: Add PCIe support for Airoha EN7523 Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 12/14] dt-bindings: arm: airoha: Add binding for Airoha GPIO controller Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau 2021-12-10 20:52 ` Rob Herring 2021-12-10 20:52 ` Rob Herring 2021-12-03 11:33 ` Felix Fietkau [this message] 2021-12-03 11:33 ` [PATCH v6 13/14] gpio: Add support for Airoha EN7523 " Felix Fietkau 2021-12-03 11:33 ` [PATCH v6 14/14] ARM: dts: add GPIO support for Airoha EN7523 Felix Fietkau 2021-12-03 11:33 ` Felix Fietkau
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