diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 241e3d9ee7aa..943d01bdb570 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -528,6 +528,13 @@ config UID_SYS_STATS_DEBUG help Per TASK based io statistics exported to /proc/uid_io +config PIR_ASCHIP + bool "Aschip PIR(Passive Infrared Sensor)" + default n + help + Provides a driver to control the sensibility of the Aschip PIR detection + sensor. + source "drivers/misc/c2port/Kconfig" source "drivers/misc/eeprom/Kconfig" source "drivers/misc/cb710/Kconfig" diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index fca6aae030f0..3a33c9b3d67f 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -59,3 +59,4 @@ obj-$(CONFIG_PCI_ENDPOINT_TEST) += pci_endpoint_test.o obj-$(CONFIG_OCXL) += ocxl/ obj-$(CONFIG_MISC_RTSX) += cardreader/ obj-$(CONFIG_UID_SYS_STATS) += uid_sys_stats.o +obj-$(CONFIG_PIR_ASCHIP) += pir-aschip.o \ No newline at end of file diff --git a/drivers/misc/pir-aschip.c b/drivers/misc/pir-aschip.c new file mode 100644 index 000000000000..576990c51c6e --- /dev/null +++ b/drivers/misc/pir-aschip.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020 Rockchip Electronics Co. Ltd. + * + */ +#include +#include +#include +#include +#include +#include +#include + +struct aschip_pir_drv_data { + struct device *dev; + struct gpio_desc *pulse_gpio; + struct proc_dir_entry *procfs; +}; + +static int pir_aschip_set_sensibility(struct aschip_pir_drv_data *drv_data, + uint32_t sensibility) +{ + if (sensibility > 100 || sensibility < 4) { + dev_err(drv_data->dev, "sensibilit should be [4, 100]\n"); + return -EINVAL; + } + + gpiod_set_value(drv_data->pulse_gpio, 1); + usleep_range(1000, 2000); + gpiod_set_value(drv_data->pulse_gpio, 0); + usleep_range(50000, 51000); + gpiod_set_value(drv_data->pulse_gpio, 1); + usleep_range(sensibility * 1000, sensibility * 1000 + 1); + gpiod_set_value(drv_data->pulse_gpio, 0); + usleep_range(50000, 51000); + gpiod_set_value(drv_data->pulse_gpio, 1); + + return 0; +} + +#ifdef CONFIG_PROC_FS +static int pir_aschip_sensibility_show(struct seq_file *s, void *v) +{ + seq_puts(s, "set sensibility [4, 100] for PIR :\n"); + seq_puts(s, " echo [nr] > /proc/pir/sensibility\n"); + + return 0; +} + +static int pir_aschip_sensibility_open(struct inode *inode, struct file *file) +{ + return single_open(file, pir_aschip_sensibility_show, PDE_DATA(inode)); +} + +static ssize_t pir_aschip_sensibility_write(struct file *filp, + const char __user *buf, + size_t cnt, loff_t *ppos) +{ + struct aschip_pir_drv_data *drv_data = ((struct seq_file *)filp->private_data)->private; + unsigned int val; + int ret; + + ret = kstrtouint_from_user(buf, cnt, 0, &val); + if (ret) + return ret; + + ret = pir_aschip_set_sensibility(drv_data, val); + return ret ? ret : cnt; +} + +static const struct file_operations pir_aschip_sensibility_fops = { + .open = pir_aschip_sensibility_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = pir_aschip_sensibility_write, +}; + +static int __init pir_aschip_create_procfs(struct aschip_pir_drv_data *drv_data) +{ + struct proc_dir_entry *ent; + + drv_data->procfs = proc_mkdir("pir", NULL); + if (!drv_data->procfs) + return -ENOMEM; + + ent = proc_create_data("sensibility", 0644, drv_data->procfs, + &pir_aschip_sensibility_fops, drv_data); + if (!ent) + goto fail; + + return 0; +fail: + proc_remove(drv_data->procfs); + return -ENOMEM; +} + +static void __exit pir_aschip_proc_release(struct aschip_pir_drv_data *drv_data) +{ + remove_proc_entry("sensibility", NULL); + proc_remove(drv_data->procfs); +} +#endif + +static int pir_aschip_probe(struct platform_device *pdev) +{ + struct aschip_pir_drv_data *drv_data; + struct device *dev = &pdev->dev; + + drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL); + if (!drv_data) + return -ENOMEM; + + drv_data->pulse_gpio = devm_gpiod_get(dev, "pulse", GPIOD_OUT_HIGH); + + if (IS_ERR(drv_data->pulse_gpio)) { + dev_err(dev, "Failed to get pwdn-gpios\n"); + return PTR_ERR(drv_data->pulse_gpio); + } + +#ifdef CONFIG_PROC_FS + pir_aschip_create_procfs(drv_data); +#endif + drv_data->dev = dev; + dev_set_drvdata(dev, drv_data); + return 0; +} + +static int pir_aschip_remove(struct platform_device *pdev) +{ +#ifdef CONFIG_PROC_FS + struct aschip_pir_drv_data *drv_data; + + drv_data = dev_get_drvdata(&pdev->dev); + pir_aschip_proc_release(drv_data); +#endif + return 0; +} + +static const struct of_device_id pir_aschip_rockchip_match[] = { + { .compatible = "aschip,pir" }, + {}, +}; + +MODULE_DEVICE_TABLE(of, pir_aschip_rockchip_match); + +static struct platform_driver pir_aschip_pltfm_driver = { + .probe = pir_aschip_probe, + .remove = pir_aschip_remove, + .driver = { + .name = "pir_aschip_aschip", + .of_match_table = pir_aschip_rockchip_match, + }, +}; + +module_platform_driver(pir_aschip_pltfm_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ziyuan Xu"); +MODULE_DESCRIPTION("Aschip PIR sensibility control driver");