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/*
* Copyright (C) 2013 Alexander Shiyan <shc_work@mail.ru>
*
* 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.
*/
#include <common.h>
#include <clock.h>
#include <io.h>
#include <init.h>
#include <linux/clk.h>
#include <linux/err.h>
static __iomem void *clps711x_timer_base;
static uint64_t clps711x_cs_read(void)
{
return ~readw(clps711x_timer_base);
}
static struct clocksource clps711x_cs = {
.read = clps711x_cs_read,
.mask = CLOCKSOURCE_MASK(16),
};
static int clps711x_cs_probe(struct device_d *dev)
{
u32 rate;
struct clk *timer_clk;
timer_clk = clk_get(dev, NULL);
if (IS_ERR(timer_clk))
return PTR_ERR(timer_clk);
rate = clk_get_rate(timer_clk);
clps711x_timer_base = dev_request_mem_region(dev, 0);
if (IS_ERR(clps711x_timer_base)) {
clk_put(timer_clk);
return PTR_ERR(clps711x_timer_base);
}
clocks_calc_mult_shift(&clps711x_cs.mult, &clps711x_cs.shift, rate,
NSEC_PER_SEC, 10);
return init_clock(&clps711x_cs);
}
static struct driver_d clps711x_cs_driver = {
.name = "clps711x-cs",
.probe = clps711x_cs_probe,
};
static __init int clps711x_cs_init(void)
{
return platform_driver_register(&clps711x_cs_driver);
}
coredevice_initcall(clps711x_cs_init);
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