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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Generic heartbeat driver for regular LED banks
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*
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* Copyright (C) 2007 - 2010 Paul Mundt
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*
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* Most SH reference boards include a number of individual LEDs that can
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* be independently controlled (either via a pre-defined hardware
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* function or via the LED class, if desired -- the hardware tends to
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* encapsulate some of the same "triggers" that the LED class supports,
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* so there's not too much value in it).
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*
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* Additionally, most of these boards also have a LED bank that we've
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* traditionally used for strobing the load average. This use case is
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* handled by this driver, rather than giving each LED bit position its
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* own struct device.
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/sched.h>
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#include <linux/sched/loadavg.h>
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#include <linux/timer.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <asm/heartbeat.h>
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#define DRV_NAME "heartbeat"
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#define DRV_VERSION "0.1.2"
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static unsigned char default_bit_pos[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
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static inline void heartbeat_toggle_bit(struct heartbeat_data *hd,
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unsigned bit, unsigned int inverted)
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{
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unsigned int new;
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new = (1 << hd->bit_pos[bit]);
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if (inverted)
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new = ~new;
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new &= hd->mask;
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switch (hd->regsize) {
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case 32:
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new |= ioread32(hd->base) & ~hd->mask;
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iowrite32(new, hd->base);
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break;
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case 16:
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new |= ioread16(hd->base) & ~hd->mask;
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iowrite16(new, hd->base);
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break;
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default:
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new |= ioread8(hd->base) & ~hd->mask;
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iowrite8(new, hd->base);
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break;
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}
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}
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static void heartbeat_timer(struct timer_list *t)
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{
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struct heartbeat_data *hd = timer_container_of(hd, t, timer);
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static unsigned bit = 0, up = 1;
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heartbeat_toggle_bit(hd, bit, hd->flags & HEARTBEAT_INVERTED);
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bit += up;
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if ((bit == 0) || (bit == (hd->nr_bits)-1))
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up = -up;
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mod_timer(&hd->timer, jiffies + (110 - ((300 << FSHIFT) /
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((avenrun[0] / 5) + (3 << FSHIFT)))));
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}
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static int heartbeat_drv_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct heartbeat_data *hd;
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int i;
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if (unlikely(pdev->num_resources != 1)) {
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dev_err(&pdev->dev, "invalid number of resources\n");
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return -EINVAL;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (unlikely(res == NULL)) {
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dev_err(&pdev->dev, "invalid resource\n");
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return -EINVAL;
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}
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if (pdev->dev.platform_data) {
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hd = pdev->dev.platform_data;
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} else {
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hd = kzalloc_obj(struct heartbeat_data);
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if (unlikely(!hd))
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return -ENOMEM;
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}
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hd->base = ioremap(res->start, resource_size(res));
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if (unlikely(!hd->base)) {
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dev_err(&pdev->dev, "ioremap failed\n");
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if (!pdev->dev.platform_data)
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kfree(hd);
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return -ENXIO;
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}
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if (!hd->nr_bits) {
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hd->bit_pos = default_bit_pos;
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hd->nr_bits = ARRAY_SIZE(default_bit_pos);
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}
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hd->mask = 0;
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for (i = 0; i < hd->nr_bits; i++)
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hd->mask |= (1 << hd->bit_pos[i]);
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if (!hd->regsize) {
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switch (res->flags & IORESOURCE_MEM_TYPE_MASK) {
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case IORESOURCE_MEM_32BIT:
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hd->regsize = 32;
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break;
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case IORESOURCE_MEM_16BIT:
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hd->regsize = 16;
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break;
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case IORESOURCE_MEM_8BIT:
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default:
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hd->regsize = 8;
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break;
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}
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}
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timer_setup(&hd->timer, heartbeat_timer, 0);
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platform_set_drvdata(pdev, hd);
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return mod_timer(&hd->timer, jiffies + 1);
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}
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static struct platform_driver heartbeat_driver = {
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.probe = heartbeat_drv_probe,
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.driver = {
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.name = DRV_NAME,
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.suppress_bind_attrs = true,
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},
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};
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static int __init heartbeat_init(void)
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{
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printk(KERN_NOTICE DRV_NAME ": version %s loaded\n", DRV_VERSION);
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return platform_driver_register(&heartbeat_driver);
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}
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device_initcall(heartbeat_init);
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