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// SPDX-License-Identifier: GPL-2.0+
/* Author: Alexander Shiyan <shc_work@mail.ru> */
#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)
{
struct resource *iores;
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);
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores)) {
clk_put(timer_clk);
return PTR_ERR(iores);
}
clps711x_timer_base = IOMEM(iores->start);
clocks_calc_mult_shift(&clps711x_cs.mult, &clps711x_cs.shift, rate,
NSEC_PER_SEC, 10);
return init_clock(&clps711x_cs);
}
static __maybe_unused struct of_device_id clps711x_timer_dt_ids[] = {
{ .compatible = "cirrus,ep7209-timer", },
{ }
};
static struct driver_d clps711x_cs_driver = {
.name = "clps711x-cs",
.probe = clps711x_cs_probe,
.of_compatible = DRV_OF_COMPAT(clps711x_timer_dt_ids),
};
coredevice_platform_driver(clps711x_cs_driver);
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