cregit-Linux how code gets into the kernel

Release 4.14 drivers/clocksource/timer-of.c

/*
 * Copyright (c) 2017, Linaro Ltd.  All rights reserved.
 *
 * Author: Daniel Lezcano <daniel.lezcano@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */
#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/slab.h>

#include "timer-of.h"


static __init void timer_irq_exit(struct of_timer_irq *of_irq) { struct timer_of *to = container_of(of_irq, struct timer_of, of_irq); struct clock_event_device *clkevt = &to->clkevt; of_irq->percpu ? free_percpu_irq(of_irq->irq, clkevt) : free_irq(of_irq->irq, clkevt); }

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Daniel Lezcano59100.00%1100.00%
Total59100.00%1100.00%


static __init int timer_irq_init(struct device_node *np, struct of_timer_irq *of_irq) { int ret; struct timer_of *to = container_of(of_irq, struct timer_of, of_irq); struct clock_event_device *clkevt = &to->clkevt; if (of_irq->name) { of_irq->irq = ret = of_irq_get_byname(np, of_irq->name); if (ret < 0) { pr_err("Failed to get interrupt %s for %s\n", of_irq->name, np->full_name); return ret; } } else { of_irq->irq = irq_of_parse_and_map(np, of_irq->index); } if (!of_irq->irq) { pr_err("Failed to map interrupt for %pOF\n", np); return -EINVAL; } ret = of_irq->percpu ? request_percpu_irq(of_irq->irq, of_irq->handler, np->full_name, clkevt) : request_irq(of_irq->irq, of_irq->handler, of_irq->flags ? of_irq->flags : IRQF_TIMER, np->full_name, clkevt); if (ret) { pr_err("Failed to request irq %d for %pOF\n", of_irq->irq, np); return ret; } clkevt->irq = of_irq->irq; return 0; }

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PersonTokensPropCommitsCommitProp
Daniel Lezcano16679.43%133.33%
Sergei Shtylyov4119.62%133.33%
Rob Herring20.96%133.33%
Total209100.00%3100.00%


static __init void timer_clk_exit(struct of_timer_clk *of_clk) { of_clk->rate = 0; clk_disable_unprepare(of_clk->clk); clk_put(of_clk->clk); }

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PersonTokensPropCommitsCommitProp
Daniel Lezcano32100.00%1100.00%
Total32100.00%1100.00%


static __init int timer_clk_init(struct device_node *np, struct of_timer_clk *of_clk) { int ret; of_clk->clk = of_clk->name ? of_clk_get_by_name(np, of_clk->name) : of_clk_get(np, of_clk->index); if (IS_ERR(of_clk->clk)) { pr_err("Failed to get clock for %pOF\n", np); return PTR_ERR(of_clk->clk); } ret = clk_prepare_enable(of_clk->clk); if (ret) { pr_err("Failed for enable clock for %pOF\n", np); goto out_clk_put; } of_clk->rate = clk_get_rate(of_clk->clk); if (!of_clk->rate) { ret = -EINVAL; pr_err("Failed to get clock rate for %pOF\n", np); goto out_clk_disable; } of_clk->period = DIV_ROUND_UP(of_clk->rate, HZ); out: return ret; out_clk_disable: clk_disable_unprepare(of_clk->clk); out_clk_put: clk_put(of_clk->clk); goto out; }

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PersonTokensPropCommitsCommitProp
Daniel Lezcano16898.25%150.00%
Rob Herring31.75%150.00%
Total171100.00%2100.00%


static __init void timer_base_exit(struct of_timer_base *of_base) { iounmap(of_base->base); }

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Daniel Lezcano19100.00%1100.00%
Total19100.00%1100.00%


static __init int timer_base_init(struct device_node *np, struct of_timer_base *of_base) { const char *name = of_base->name ? of_base->name : np->full_name; of_base->base = of_io_request_and_map(np, of_base->index, name); if (IS_ERR(of_base->base)) { pr_err("Failed to iomap (%s)\n", name); return PTR_ERR(of_base->base); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano6988.46%150.00%
Dan Carpenter911.54%150.00%
Total78100.00%2100.00%


int __init timer_of_init(struct device_node *np, struct timer_of *to) { int ret = -EINVAL; int flags = 0; if (to->flags & TIMER_OF_BASE) { ret = timer_base_init(np, &to->of_base); if (ret) goto out_fail; flags |= TIMER_OF_BASE; } if (to->flags & TIMER_OF_CLOCK) { ret = timer_clk_init(np, &to->of_clk); if (ret) goto out_fail; flags |= TIMER_OF_CLOCK; } if (to->flags & TIMER_OF_IRQ) { ret = timer_irq_init(np, &to->of_irq); if (ret) goto out_fail; flags |= TIMER_OF_IRQ; } if (!to->clkevt.name) to->clkevt.name = np->name; return ret; out_fail: if (flags & TIMER_OF_IRQ) timer_irq_exit(&to->of_irq); if (flags & TIMER_OF_CLOCK) timer_clk_exit(&to->of_clk); if (flags & TIMER_OF_BASE) timer_base_exit(&to->of_base); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano18996.92%150.00%
Arnd Bergmann63.08%150.00%
Total195100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Daniel Lezcano72492.23%120.00%
Sergei Shtylyov415.22%120.00%
Dan Carpenter91.15%120.00%
Arnd Bergmann60.76%120.00%
Rob Herring50.64%120.00%
Total785100.00%5100.00%
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