/* * Generic OPP debugfs interface * * Copyright (C) 2015-2016 Viresh Kumar * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include "opp.h" static struct dentry *rootdir; static void opp_set_dev_name(const struct device *dev, char *name) { if (dev->parent) snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent), dev_name(dev)); else snprintf(name, NAME_MAX, "%s", dev_name(dev)); } void opp_debug_remove_one(struct dev_pm_opp *opp) { debugfs_remove_recursive(opp->dentry); } static bool opp_debug_create_supplies(struct dev_pm_opp *opp, struct opp_table *opp_table, struct dentry *pdentry) { struct dentry *d; int i; for (i = 0; i < opp_table->regulator_count; i++) { char name[15]; snprintf(name, sizeof(name), "supply-%d", i); /* Create per-opp directory */ d = debugfs_create_dir(name, pdentry); if (!d) return false; if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->supplies[i].u_volt)) return false; if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->supplies[i].u_volt_min)) return false; if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->supplies[i].u_volt_max)) return false; if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->supplies[i].u_amp)) return false; } return true; } int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) { struct dentry *pdentry = opp_table->dentry; struct dentry *d; char name[25]; /* 20 chars for 64 bit value + 5 (opp:\0) */ /* Rate is unique to each OPP, use it to give opp-name */ snprintf(name, sizeof(name), "opp:%lu", opp->rate); /* Create per-opp directory */ d = debugfs_create_dir(name, pdentry); if (!d) return -ENOMEM; if (!debugfs_create_bool("available", S_IRUGO, d, &opp->available)) return -ENOMEM; if (!debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic)) return -ENOMEM; if (!debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo)) return -ENOMEM; if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend)) return -ENOMEM; if (!debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate)) return -ENOMEM; if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate)) return -ENOMEM; if (!opp_debug_create_supplies(opp, opp_table, d)) return -ENOMEM; if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d, &opp->clock_latency_ns)) return -ENOMEM; opp->dentry = d; return 0; } static int opp_list_debug_create_dir(struct opp_device *opp_dev, struct opp_table *opp_table) { const struct device *dev = opp_dev->dev; struct dentry *d; opp_set_dev_name(dev, opp_table->dentry_name); /* Create device specific directory */ d = debugfs_create_dir(opp_table->dentry_name, rootdir); if (!d) { dev_err(dev, "%s: Failed to create debugfs dir\n", __func__); return -ENOMEM; } opp_dev->dentry = d; opp_table->dentry = d; return 0; } static int opp_list_debug_create_link(struct opp_device *opp_dev, struct opp_table *opp_table) { const struct device *dev = opp_dev->dev; char name[NAME_MAX]; struct dentry *d; opp_set_dev_name(opp_dev->dev, name); /* Create device specific directory link */ d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name); if (!d) { dev_err(dev, "%s: Failed to create link\n", __func__); return -ENOMEM; } opp_dev->dentry = d; return 0; } /** * opp_debug_register - add a device opp node to the debugfs 'opp' directory * @opp_dev: opp-dev pointer for device * @opp_table: the device-opp being added * * Dynamically adds device specific directory in debugfs 'opp' directory. If the * device-opp is shared with other devices, then links will be created for all * devices except the first. * * Return: 0 on success, otherwise negative error. */ int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table) { if (!rootdir) { pr_debug("%s: Uninitialized rootdir\n", __func__); return -EINVAL; } if (opp_table->dentry) return opp_list_debug_create_link(opp_dev, opp_table); return opp_list_debug_create_dir(opp_dev, opp_table); } static void opp_migrate_dentry(struct opp_device *opp_dev, struct opp_table *opp_table) { struct opp_device *new_dev; const struct device *dev; struct dentry *dentry; /* Look for next opp-dev */ list_for_each_entry(new_dev, &opp_table->dev_list, node) if (new_dev != opp_dev) break; /* new_dev is guaranteed to be valid here */ dev = new_dev->dev; debugfs_remove_recursive(new_dev->dentry); opp_set_dev_name(dev, opp_table->dentry_name); dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir, opp_table->dentry_name); if (!dentry) { dev_err(dev, "%s: Failed to rename link from: %s to %s\n", __func__, dev_name(opp_dev->dev), dev_name(dev)); return; } new_dev->dentry = dentry; opp_table->dentry = dentry; } /** * opp_debug_unregister - remove a device opp node from debugfs opp directory * @opp_dev: opp-dev pointer for device * @opp_table: the device-opp being removed * * Dynamically removes device specific directory from debugfs 'opp' directory. */ void opp_debug_unregister(struct opp_device *opp_dev, struct opp_table *opp_table) { if (opp_dev->dentry == opp_table->dentry) { /* Move the real dentry object under another device */ if (!list_is_singular(&opp_table->dev_list)) { opp_migrate_dentry(opp_dev, opp_table); goto out; } opp_table->dentry = NULL; } debugfs_remove_recursive(opp_dev->dentry); out: opp_dev->dentry = NULL; } static int __init opp_debug_init(void) { /* Create /sys/kernel/debug/opp directory */ rootdir = debugfs_create_dir("opp", NULL); if (!rootdir) { pr_err("%s: Failed to create root directory\n", __func__); return -ENOMEM; } return 0; } core_initcall(opp_debug_init); x-6.18.y'>linux-6.18.y Hosts the 0x221E linux distro kernel.Ubuntu
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path: root/drivers/staging/dgnc/dgnc_tty.h
AgeCommit message (Collapse)Author
2018-01-15staging: dgnc: remove redundant license textGreg Kroah-Hartman
Now that the SPDX tag is in all drivers/staging/dgnc files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-15staging: dgnc: add SPDX identifier.Greg Kroah-Hartman
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Fix up the staging dgnc driver to have a proper SPDX identifier, based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Lidza Louina <lidza.louina@gmail.com> Cc: Mark Hounschell <markh@compro.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-29staging: dgnc: remove double underscoreTobin C. Harding
Pre-processor header guards use double underscore, typically kernel code uses single underscore when defining header guards. 'endif' statement should include what is ending as a comment string. Remove double underscore, add comment string to 'endif' Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-06staging: dgnc: fix unnamed parameterFernando Apesteguia
This patch fixes a checkpatch warning. Signed-off-by: Fernando Apesteguia <fernando.apesteguia@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-25staging: dgnc: Remove some redundant functionsPankaj Bharadiya
dgnc_tty_preinit() and dgnc_tty_post_uninit() functions are used to allocate and free "dgnc_TmpWriteBuf" and this "dgnc_TmpWriteBuf" is not really getting used. Hence remove these redundant functions. Also remove dgnc_TmpWriteBuf variable as it is not used anymore. Signed-off-by: Pankaj Bharadiya <pankaj.bharadiya@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-27staging: dgnc: rename dgnc_tty_uninit() to dgnc_cleanup_tty()Daeseok Youn
The dgnc_tty_uninit() doesn't match with dgnc_tty_init() at all. And also the dgnc_cleanup_tty() is only called for exiting the module. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-27staging: dgnc: introduce the dgnc_tty_unregister()Daeseok Youn
The dgnc_tty_unregister() will be called when the dgnc_tty_register() is failed. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>