Loading drivers/extcon/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -43,6 +43,15 @@ config EXTCON_GPIO Say Y here to enable GPIO based extcon support. Note that GPIO extcon supports single state per extcon instance. config EXTCON_STORAGE_CD_GPIO tristate "Storage card detect GPIO extcon support" depends on GPIOLIB || COMPILE_TEST help Say Y here to enable removable storage card detect GPIO based extcon support. It helps when different kinds of storage cards share one detect GPIO. Note that storage card detect GPIO extcon supports single state per extcon instance. config EXTCON_INTEL_INT3496 tristate "Intel INT3496 ACPI device extcon driver" depends on GPIOLIB && ACPI && (X86 || COMPILE_TEST) Loading drivers/extcon/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -9,6 +9,7 @@ obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o obj-$(CONFIG_EXTCON_AXP288) += extcon-axp288.o obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o obj-$(CONFIG_EXTCON_STORAGE_CD_GPIO) += extcon-storage-cd-gpio.o obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o Loading drivers/extcon/extcon-storage-cd-gpio.c 0 → 100644 +218 −0 Original line number Diff line number Diff line // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2019, Linux Foundation. All rights reserved. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/extcon-provider.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/of_gpio.h> struct cd_gpio_extcon_data { struct extcon_dev *edev; int irq; struct gpio_desc *gpiod; unsigned int extcon_id; unsigned long irq_flags; struct pinctrl *pctrl; struct pinctrl_state *pins_default; unsigned int *supported_cable; }; static irqreturn_t cd_gpio_threaded_irq_handler(int irq, void *dev_id) { int state; struct cd_gpio_extcon_data *data = dev_id; state = gpiod_get_value_cansleep(data->gpiod); extcon_set_state_sync(data->edev, data->extcon_id, state); return IRQ_HANDLED; } static int extcon_parse_pinctrl_data(struct device *dev, struct cd_gpio_extcon_data *data) { struct pinctrl *pctrl; int ret = 0; /* Try to obtain pinctrl handle */ pctrl = devm_pinctrl_get(dev); if (IS_ERR(pctrl)) { ret = PTR_ERR(pctrl); goto out; } data->pctrl = pctrl; /* Look-up and keep the state handy to be used later */ data->pins_default = pinctrl_lookup_state(data->pctrl, "default"); if (IS_ERR(data->pins_default)) { ret = PTR_ERR(data->pins_default); dev_err(dev, "Can't get default pinctrl state, ret %d\n", ret); } out: return ret; } static int extcon_populate_data(struct device *dev, struct cd_gpio_extcon_data *data) { struct device_node *np = dev->of_node; u32 val; int ret = 0; ret = of_property_read_u32(np, "extcon-id", &data->extcon_id); if (ret) { dev_err(dev, "failed to read extcon-id property, %d\n", ret); goto out; } ret = of_property_read_u32(np, "irq-flags", &val); if (ret) { dev_err(dev, "failed to read irq-flags property, %d\n", ret); goto out; } data->irq_flags = val; ret = extcon_parse_pinctrl_data(dev, data); if (ret) dev_err(dev, "failed to parse pinctrl data\n"); out: return ret; } static int cd_gpio_extcon_probe(struct platform_device *pdev) { struct cd_gpio_extcon_data *data; struct device *dev = &pdev->dev; int state, ret; data = devm_kzalloc(dev, sizeof(struct cd_gpio_extcon_data), GFP_KERNEL); if (!data) return -ENOMEM; if (!data->irq_flags) { /* try populating cd gpio extcon data from device tree */ ret = extcon_populate_data(dev, data); if (ret) return ret; } if (!data->irq_flags || data->extcon_id >= EXTCON_NUM) return -EINVAL; ret = pinctrl_select_state(data->pctrl, data->pins_default); if (ret < 0) dev_err(dev, "pinctrl state select failed, ret %d\n", ret); data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN); if (IS_ERR(data->gpiod)) return PTR_ERR(data->gpiod); data->irq = gpiod_to_irq(data->gpiod); if (data->irq <= 0) return data->irq; data->supported_cable = devm_kzalloc(dev, sizeof(*data->supported_cable) * 2, GFP_KERNEL); if (!data->supported_cable) return -ENOMEM; data->supported_cable[0] = data->extcon_id; data->supported_cable[1] = EXTCON_NONE; /* Allocate the memory of extcon devie and register extcon device */ data->edev = devm_extcon_dev_allocate(dev, data->supported_cable); if (IS_ERR(data->edev)) { dev_err(dev, "failed to allocate extcon device\n"); return -ENOMEM; } ret = devm_extcon_dev_register(dev, data->edev); if (ret < 0) return ret; ret = devm_request_threaded_irq(dev, data->irq, NULL, cd_gpio_threaded_irq_handler, data->irq_flags | IRQF_ONESHOT, pdev->name, data); if (ret < 0) return ret; ret = enable_irq_wake(data->irq); if (ret) return ret; platform_set_drvdata(pdev, data); /* Update initial state */ state = gpiod_get_value_cansleep(data->gpiod); extcon_set_state(data->edev, data->extcon_id, state); return 0; } static int cd_gpio_extcon_remove(struct platform_device *pdev) { return 0; } #ifdef CONFIG_PM_SLEEP static int cd_gpio_extcon_resume(struct device *dev) { struct cd_gpio_extcon_data *data; int state, ret = 0; data = dev_get_drvdata(dev); state = gpiod_get_value_cansleep(data->gpiod); ret = extcon_set_state_sync(data->edev, data->extcon_id, state); if (ret) dev_err(dev, "%s: Failed to set extcon gpio state\n", __func__); return ret; } static const struct dev_pm_ops cd_gpio_extcon_pm_ops = { SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, cd_gpio_extcon_resume) }; #define EXTCON_GPIO_PMOPS (&cd_gpio_extcon_pm_ops) #else #define EXTCON_GPIO_PMOPS NULL #endif static const struct of_device_id extcon_cd_gpio_of_match[] = { { .compatible = "extcon-storage-cd-gpio"}, {}, }; static struct platform_driver cd_gpio_extcon_driver = { .probe = cd_gpio_extcon_probe, .remove = cd_gpio_extcon_remove, .driver = { .name = "extcon-storage-cd-gpio", .pm = EXTCON_GPIO_PMOPS, .of_match_table = of_match_ptr(extcon_cd_gpio_of_match), }, }; module_platform_driver(cd_gpio_extcon_driver); MODULE_DESCRIPTION("Storage card detect GPIO based extcon driver"); MODULE_LICENSE("GPL v2"); drivers/scsi/ufs/Kconfig +1 −1 Original line number Diff line number Diff line Loading @@ -93,7 +93,7 @@ config SCSI_UFS_QCOM depends on SCSI_UFSHCD_PLATFORM && ARCH_QCOM select PHY_QCOM_UFS select EXTCON select EXTCON_GPIO select EXTCON_STORAGE_CD_GPIO help This selects the QCOM specific additions to UFSHCD platform driver. UFS host on QCOM needs some vendor specific configuration before Loading Loading
drivers/extcon/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -43,6 +43,15 @@ config EXTCON_GPIO Say Y here to enable GPIO based extcon support. Note that GPIO extcon supports single state per extcon instance. config EXTCON_STORAGE_CD_GPIO tristate "Storage card detect GPIO extcon support" depends on GPIOLIB || COMPILE_TEST help Say Y here to enable removable storage card detect GPIO based extcon support. It helps when different kinds of storage cards share one detect GPIO. Note that storage card detect GPIO extcon supports single state per extcon instance. config EXTCON_INTEL_INT3496 tristate "Intel INT3496 ACPI device extcon driver" depends on GPIOLIB && ACPI && (X86 || COMPILE_TEST) Loading
drivers/extcon/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -9,6 +9,7 @@ obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o obj-$(CONFIG_EXTCON_AXP288) += extcon-axp288.o obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o obj-$(CONFIG_EXTCON_STORAGE_CD_GPIO) += extcon-storage-cd-gpio.o obj-$(CONFIG_EXTCON_INTEL_INT3496) += extcon-intel-int3496.o obj-$(CONFIG_EXTCON_INTEL_CHT_WC) += extcon-intel-cht-wc.o obj-$(CONFIG_EXTCON_MAX14577) += extcon-max14577.o Loading
drivers/extcon/extcon-storage-cd-gpio.c 0 → 100644 +218 −0 Original line number Diff line number Diff line // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2019, Linux Foundation. All rights reserved. * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/extcon-provider.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/of_gpio.h> struct cd_gpio_extcon_data { struct extcon_dev *edev; int irq; struct gpio_desc *gpiod; unsigned int extcon_id; unsigned long irq_flags; struct pinctrl *pctrl; struct pinctrl_state *pins_default; unsigned int *supported_cable; }; static irqreturn_t cd_gpio_threaded_irq_handler(int irq, void *dev_id) { int state; struct cd_gpio_extcon_data *data = dev_id; state = gpiod_get_value_cansleep(data->gpiod); extcon_set_state_sync(data->edev, data->extcon_id, state); return IRQ_HANDLED; } static int extcon_parse_pinctrl_data(struct device *dev, struct cd_gpio_extcon_data *data) { struct pinctrl *pctrl; int ret = 0; /* Try to obtain pinctrl handle */ pctrl = devm_pinctrl_get(dev); if (IS_ERR(pctrl)) { ret = PTR_ERR(pctrl); goto out; } data->pctrl = pctrl; /* Look-up and keep the state handy to be used later */ data->pins_default = pinctrl_lookup_state(data->pctrl, "default"); if (IS_ERR(data->pins_default)) { ret = PTR_ERR(data->pins_default); dev_err(dev, "Can't get default pinctrl state, ret %d\n", ret); } out: return ret; } static int extcon_populate_data(struct device *dev, struct cd_gpio_extcon_data *data) { struct device_node *np = dev->of_node; u32 val; int ret = 0; ret = of_property_read_u32(np, "extcon-id", &data->extcon_id); if (ret) { dev_err(dev, "failed to read extcon-id property, %d\n", ret); goto out; } ret = of_property_read_u32(np, "irq-flags", &val); if (ret) { dev_err(dev, "failed to read irq-flags property, %d\n", ret); goto out; } data->irq_flags = val; ret = extcon_parse_pinctrl_data(dev, data); if (ret) dev_err(dev, "failed to parse pinctrl data\n"); out: return ret; } static int cd_gpio_extcon_probe(struct platform_device *pdev) { struct cd_gpio_extcon_data *data; struct device *dev = &pdev->dev; int state, ret; data = devm_kzalloc(dev, sizeof(struct cd_gpio_extcon_data), GFP_KERNEL); if (!data) return -ENOMEM; if (!data->irq_flags) { /* try populating cd gpio extcon data from device tree */ ret = extcon_populate_data(dev, data); if (ret) return ret; } if (!data->irq_flags || data->extcon_id >= EXTCON_NUM) return -EINVAL; ret = pinctrl_select_state(data->pctrl, data->pins_default); if (ret < 0) dev_err(dev, "pinctrl state select failed, ret %d\n", ret); data->gpiod = devm_gpiod_get(dev, "extcon", GPIOD_IN); if (IS_ERR(data->gpiod)) return PTR_ERR(data->gpiod); data->irq = gpiod_to_irq(data->gpiod); if (data->irq <= 0) return data->irq; data->supported_cable = devm_kzalloc(dev, sizeof(*data->supported_cable) * 2, GFP_KERNEL); if (!data->supported_cable) return -ENOMEM; data->supported_cable[0] = data->extcon_id; data->supported_cable[1] = EXTCON_NONE; /* Allocate the memory of extcon devie and register extcon device */ data->edev = devm_extcon_dev_allocate(dev, data->supported_cable); if (IS_ERR(data->edev)) { dev_err(dev, "failed to allocate extcon device\n"); return -ENOMEM; } ret = devm_extcon_dev_register(dev, data->edev); if (ret < 0) return ret; ret = devm_request_threaded_irq(dev, data->irq, NULL, cd_gpio_threaded_irq_handler, data->irq_flags | IRQF_ONESHOT, pdev->name, data); if (ret < 0) return ret; ret = enable_irq_wake(data->irq); if (ret) return ret; platform_set_drvdata(pdev, data); /* Update initial state */ state = gpiod_get_value_cansleep(data->gpiod); extcon_set_state(data->edev, data->extcon_id, state); return 0; } static int cd_gpio_extcon_remove(struct platform_device *pdev) { return 0; } #ifdef CONFIG_PM_SLEEP static int cd_gpio_extcon_resume(struct device *dev) { struct cd_gpio_extcon_data *data; int state, ret = 0; data = dev_get_drvdata(dev); state = gpiod_get_value_cansleep(data->gpiod); ret = extcon_set_state_sync(data->edev, data->extcon_id, state); if (ret) dev_err(dev, "%s: Failed to set extcon gpio state\n", __func__); return ret; } static const struct dev_pm_ops cd_gpio_extcon_pm_ops = { SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, cd_gpio_extcon_resume) }; #define EXTCON_GPIO_PMOPS (&cd_gpio_extcon_pm_ops) #else #define EXTCON_GPIO_PMOPS NULL #endif static const struct of_device_id extcon_cd_gpio_of_match[] = { { .compatible = "extcon-storage-cd-gpio"}, {}, }; static struct platform_driver cd_gpio_extcon_driver = { .probe = cd_gpio_extcon_probe, .remove = cd_gpio_extcon_remove, .driver = { .name = "extcon-storage-cd-gpio", .pm = EXTCON_GPIO_PMOPS, .of_match_table = of_match_ptr(extcon_cd_gpio_of_match), }, }; module_platform_driver(cd_gpio_extcon_driver); MODULE_DESCRIPTION("Storage card detect GPIO based extcon driver"); MODULE_LICENSE("GPL v2");
drivers/scsi/ufs/Kconfig +1 −1 Original line number Diff line number Diff line Loading @@ -93,7 +93,7 @@ config SCSI_UFS_QCOM depends on SCSI_UFSHCD_PLATFORM && ARCH_QCOM select PHY_QCOM_UFS select EXTCON select EXTCON_GPIO select EXTCON_STORAGE_CD_GPIO help This selects the QCOM specific additions to UFSHCD platform driver. UFS host on QCOM needs some vendor specific configuration before Loading
