diff options
Diffstat (limited to 'drivers/pps')
| -rw-r--r-- | drivers/pps/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pps/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pps/clients/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pps/clients/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pps/clients/pps-gpio.c | 169 | ||||
| -rw-r--r-- | drivers/pps/clients/pps-ktimer.c | 16 | ||||
| -rw-r--r-- | drivers/pps/clients/pps-ldisc.c | 16 | ||||
| -rw-r--r-- | drivers/pps/clients/pps_parport.c | 16 | ||||
| -rw-r--r-- | drivers/pps/generators/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pps/generators/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pps/generators/pps_gen_parport.c | 16 | ||||
| -rw-r--r-- | drivers/pps/kapi.c | 16 | ||||
| -rw-r--r-- | drivers/pps/kc.c | 15 | ||||
| -rw-r--r-- | drivers/pps/kc.h | 15 | ||||
| -rw-r--r-- | drivers/pps/pps.c | 16 | ||||
| -rw-r--r-- | drivers/pps/sysfs.c | 16 |
16 files changed, 131 insertions, 186 deletions
diff --git a/drivers/pps/Kconfig b/drivers/pps/Kconfig index 965aa086a1e0..afbf5e2b06b7 100644 --- a/drivers/pps/Kconfig +++ b/drivers/pps/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # PPS support configuration # diff --git a/drivers/pps/Makefile b/drivers/pps/Makefile index 4483eaadaddd..ceaf65cc1f1d 100644 --- a/drivers/pps/Makefile +++ b/drivers/pps/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Makefile for the PPS core. # diff --git a/drivers/pps/clients/Kconfig b/drivers/pps/clients/Kconfig index 7f02a9b1a1fd..4f3244e17aa1 100644 --- a/drivers/pps/clients/Kconfig +++ b/drivers/pps/clients/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # PPS clients configuration # diff --git a/drivers/pps/clients/Makefile b/drivers/pps/clients/Makefile index a461d15f4a2e..7a3807e57832 100644 --- a/drivers/pps/clients/Makefile +++ b/drivers/pps/clients/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Makefile for PPS clients. # diff --git a/drivers/pps/clients/pps-gpio.c b/drivers/pps/clients/pps-gpio.c index dd5d1103e02b..e0de1df2ede0 100644 --- a/drivers/pps/clients/pps-gpio.c +++ b/drivers/pps/clients/pps-gpio.c @@ -1,23 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pps-gpio.c -- PPS client driver using GPIO * - * * Copyright (C) 2010 Ricardo Martins <rasm@fe.up.pt> * Copyright (C) 2011 James Nuss <jamesnuss@nanometrics.ca> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define PPS_GPIO_NAME "pps-gpio" @@ -31,19 +17,25 @@ #include <linux/slab.h> #include <linux/pps_kernel.h> #include <linux/pps-gpio.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/list.h> #include <linux/of_device.h> #include <linux/of_gpio.h> +#include <linux/timer.h> +#include <linux/jiffies.h> /* Info for each registered platform device */ struct pps_gpio_device_data { int irq; /* IRQ used as PPS source */ struct pps_device *pps; /* PPS source device */ struct pps_source_info info; /* PPS source information */ + struct gpio_desc *gpio_pin; /* GPIO port descriptors */ + struct gpio_desc *echo_pin; + struct timer_list echo_timer; /* timer to reset echo active state */ bool assert_falling_edge; bool capture_clear; - unsigned int gpio_pin; + unsigned int echo_active_ms; /* PPS echo active duration */ + unsigned long echo_timeout; /* timer timeout value in jiffies */ }; /* @@ -61,18 +53,101 @@ static irqreturn_t pps_gpio_irq_handler(int irq, void *data) info = data; - rising_edge = gpio_get_value(info->gpio_pin); + rising_edge = gpiod_get_value(info->gpio_pin); if ((rising_edge && !info->assert_falling_edge) || (!rising_edge && info->assert_falling_edge)) - pps_event(info->pps, &ts, PPS_CAPTUREASSERT, NULL); + pps_event(info->pps, &ts, PPS_CAPTUREASSERT, data); else if (info->capture_clear && ((rising_edge && info->assert_falling_edge) || - (!rising_edge && !info->assert_falling_edge))) - pps_event(info->pps, &ts, PPS_CAPTURECLEAR, NULL); + (!rising_edge && !info->assert_falling_edge))) + pps_event(info->pps, &ts, PPS_CAPTURECLEAR, data); return IRQ_HANDLED; } +/* This function will only be called when an ECHO GPIO is defined */ +static void pps_gpio_echo(struct pps_device *pps, int event, void *data) +{ + /* add_timer() needs to write into info->echo_timer */ + struct pps_gpio_device_data *info = data; + + switch (event) { + case PPS_CAPTUREASSERT: + if (pps->params.mode & PPS_ECHOASSERT) + gpiod_set_value(info->echo_pin, 1); + break; + + case PPS_CAPTURECLEAR: + if (pps->params.mode & PPS_ECHOCLEAR) + gpiod_set_value(info->echo_pin, 1); + break; + } + + /* fire the timer */ + if (info->pps->params.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) { + info->echo_timer.expires = jiffies + info->echo_timeout; + add_timer(&info->echo_timer); + } +} + +/* Timer callback to reset the echo pin to the inactive state */ +static void pps_gpio_echo_timer_callback(struct timer_list *t) +{ + const struct pps_gpio_device_data *info; + + info = from_timer(info, t, echo_timer); + + gpiod_set_value(info->echo_pin, 0); +} + +static int pps_gpio_setup(struct platform_device *pdev) +{ + struct pps_gpio_device_data *data = platform_get_drvdata(pdev); + struct device_node *np = pdev->dev.of_node; + int ret; + u32 value; + + data->gpio_pin = devm_gpiod_get(&pdev->dev, + NULL, /* request "gpios" */ + GPIOD_IN); + if (IS_ERR(data->gpio_pin)) { + dev_err(&pdev->dev, + "failed to request PPS GPIO\n"); + return PTR_ERR(data->gpio_pin); + } + + data->echo_pin = devm_gpiod_get_optional(&pdev->dev, + "echo", + GPIOD_OUT_LOW); + if (data->echo_pin) { + if (IS_ERR(data->echo_pin)) { + dev_err(&pdev->dev, "failed to request ECHO GPIO\n"); + return PTR_ERR(data->echo_pin); + } + + ret = of_property_read_u32(np, + "echo-active-ms", + &value); + if (ret) { + dev_err(&pdev->dev, + "failed to get echo-active-ms from OF\n"); + return ret; + } + data->echo_active_ms = value; + /* sanity check on echo_active_ms */ + if (!data->echo_active_ms || data->echo_active_ms > 999) { + dev_err(&pdev->dev, + "echo-active-ms: %u - bad value from OF\n", + data->echo_active_ms); + return -EINVAL; + } + } + + if (of_property_read_bool(np, "assert-falling-edge")) + data->assert_falling_edge = true; + return 0; +} + static unsigned long get_irqf_trigger_flags(const struct pps_gpio_device_data *data) { @@ -90,53 +165,32 @@ get_irqf_trigger_flags(const struct pps_gpio_device_data *data) static int pps_gpio_probe(struct platform_device *pdev) { struct pps_gpio_device_data *data; - const char *gpio_label; int ret; int pps_default_params; const struct pps_gpio_platform_data *pdata = pdev->dev.platform_data; - struct device_node *np = pdev->dev.of_node; /* allocate space for device info */ - data = devm_kzalloc(&pdev->dev, sizeof(struct pps_gpio_device_data), - GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; + platform_set_drvdata(pdev, data); + /* GPIO setup */ if (pdata) { data->gpio_pin = pdata->gpio_pin; - gpio_label = pdata->gpio_label; + data->echo_pin = pdata->echo_pin; data->assert_falling_edge = pdata->assert_falling_edge; data->capture_clear = pdata->capture_clear; + data->echo_active_ms = pdata->echo_active_ms; } else { - ret = of_get_gpio(np, 0); - if (ret < 0) { - dev_err(&pdev->dev, "failed to get GPIO from device tree\n"); - return ret; - } - data->gpio_pin = ret; - gpio_label = PPS_GPIO_NAME; - - if (of_get_property(np, "assert-falling-edge", NULL)) - data->assert_falling_edge = true; - } - - /* GPIO setup */ - ret = devm_gpio_request(&pdev->dev, data->gpio_pin, gpio_label); - if (ret) { - dev_err(&pdev->dev, "failed to request GPIO %u\n", - data->gpio_pin); - return ret; - } - - ret = gpio_direction_input(data->gpio_pin); - if (ret) { - dev_err(&pdev->dev, "failed to set pin direction\n"); - return -EINVAL; + ret = pps_gpio_setup(pdev); + if (ret) + return -EINVAL; } /* IRQ setup */ - ret = gpio_to_irq(data->gpio_pin); + ret = gpiod_to_irq(data->gpio_pin); if (ret < 0) { dev_err(&pdev->dev, "failed to map GPIO to IRQ: %d\n", ret); return -EINVAL; @@ -152,6 +206,11 @@ static int pps_gpio_probe(struct platform_device *pdev) data->info.owner = THIS_MODULE; snprintf(data->info.name, PPS_MAX_NAME_LEN - 1, "%s.%d", pdev->name, pdev->id); + if (data->echo_pin) { + data->info.echo = pps_gpio_echo; + data->echo_timeout = msecs_to_jiffies(data->echo_active_ms); + timer_setup(&data->echo_timer, pps_gpio_echo_timer_callback, 0); + } /* register PPS source */ pps_default_params = PPS_CAPTUREASSERT | PPS_OFFSETASSERT; @@ -173,7 +232,6 @@ static int pps_gpio_probe(struct platform_device *pdev) return -EINVAL; } - platform_set_drvdata(pdev, data); dev_info(data->pps->dev, "Registered IRQ %d as PPS source\n", data->irq); @@ -185,6 +243,11 @@ static int pps_gpio_remove(struct platform_device *pdev) struct pps_gpio_device_data *data = platform_get_drvdata(pdev); pps_unregister_source(data->pps); + if (data->echo_pin) { + del_timer_sync(&data->echo_timer); + /* reset echo pin in any case */ + gpiod_set_value(data->echo_pin, 0); + } dev_info(&pdev->dev, "removed IRQ %d as PPS source\n", data->irq); return 0; } @@ -209,4 +272,4 @@ MODULE_AUTHOR("Ricardo Martins <rasm@fe.up.pt>"); MODULE_AUTHOR("James Nuss <jamesnuss@nanometrics.ca>"); MODULE_DESCRIPTION("Use GPIO pin as PPS source"); MODULE_LICENSE("GPL"); -MODULE_VERSION("1.0.0"); +MODULE_VERSION("1.2.0"); diff --git a/drivers/pps/clients/pps-ktimer.c b/drivers/pps/clients/pps-ktimer.c index 728818b87af3..d33106bd7a29 100644 --- a/drivers/pps/clients/pps-ktimer.c +++ b/drivers/pps/clients/pps-ktimer.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pps-ktimer.c -- kernel timer test client * - * * Copyright (C) 2005-2006 Rodolfo Giometti <giometti@linux.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/pps/clients/pps-ldisc.c b/drivers/pps/clients/pps-ldisc.c index 00f6c460e493..4fd0cbf7f931 100644 --- a/drivers/pps/clients/pps-ldisc.c +++ b/drivers/pps/clients/pps-ldisc.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pps-ldisc.c -- PPS line discipline * - * * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/pps/clients/pps_parport.c b/drivers/pps/clients/pps_parport.c index 7226e39aae83..7a41fb7b0dec 100644 --- a/drivers/pps/clients/pps_parport.c +++ b/drivers/pps/clients/pps_parport.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pps_parport.c -- kernel parallel port PPS client * - * * Copyright (C) 2009 Alexander Gordeev <lasaine@lvk.cs.msu.su> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ diff --git a/drivers/pps/generators/Kconfig b/drivers/pps/generators/Kconfig index e4c4f3dc0728..d615e640fcad 100644 --- a/drivers/pps/generators/Kconfig +++ b/drivers/pps/generators/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # PPS generators configuration # diff --git a/drivers/pps/generators/Makefile b/drivers/pps/generators/Makefile index 303304a6b8ec..2d56dd0495d5 100644 --- a/drivers/pps/generators/Makefile +++ b/drivers/pps/generators/Makefile @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only # # Makefile for PPS generators. # diff --git a/drivers/pps/generators/pps_gen_parport.c b/drivers/pps/generators/pps_gen_parport.c index 7fd36cac063b..6a1af7664f3b 100644 --- a/drivers/pps/generators/pps_gen_parport.c +++ b/drivers/pps/generators/pps_gen_parport.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * pps_gen_parport.c -- kernel parallel port PPS signal generator * - * * Copyright (C) 2009 Alexander Gordeev <lasaine@lvk.cs.msu.su> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c index a1c3cd38754f..d9d566f70ed1 100644 --- a/drivers/pps/kapi.c +++ b/drivers/pps/kapi.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * kernel API * - * * Copyright (C) 2005-2009 Rodolfo Giometti <giometti@linux.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/pps/kc.c b/drivers/pps/kc.c index e219db1f1c84..50dc59af45be 100644 --- a/drivers/pps/kc.c +++ b/drivers/pps/kc.c @@ -1,21 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PPS kernel consumer API * * Copyright (C) 2009-2010 Alexander Gordeev <lasaine@lvk.cs.msu.su> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/pps/kc.h b/drivers/pps/kc.h index d296fcd0a175..24730559449c 100644 --- a/drivers/pps/kc.h +++ b/drivers/pps/kc.h @@ -1,21 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * PPS kernel consumer API header * * Copyright (C) 2009-2010 Alexander Gordeev <lasaine@lvk.cs.msu.su> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef LINUX_PPS_KC_H diff --git a/drivers/pps/pps.c b/drivers/pps/pps.c index 8febacb8fc54..3a546ec10d90 100644 --- a/drivers/pps/pps.c +++ b/drivers/pps/pps.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PPS core file * - * * Copyright (C) 2005-2009 Rodolfo Giometti <giometti@linux.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt diff --git a/drivers/pps/sysfs.c b/drivers/pps/sysfs.c index aefb75d67094..134bc33f6ad0 100644 --- a/drivers/pps/sysfs.c +++ b/drivers/pps/sysfs.c @@ -1,22 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PPS sysfs support * - * * Copyright (C) 2007-2009 Rodolfo Giometti <giometti@linux.it> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |