int gpmc_calc_divider(unsigned int sync_clk)
{
int div;
u32 l;
l = sync_clk + (gpmc_get_fclk_period() - 1);
div = l / gpmc_get_fclk_period();
if (div > 4)
return -1;
if (div <= 0)
div = 1;
return div;
}
/* tusb driver calls this when it changes the chip's clocking */
int tusb6010_platform_retime(unsigned is_refclk)
{
static const char error[] =
KERN_ERR "tusb6010 %s retime error %d\n";
unsigned fclk_ps = gpmc_get_fclk_period();
unsigned sysclk_ps;
int status;
if (!refclk_psec || fclk_ps == 0)
return -ENODEV;
sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
status = tusb_set_async_mode(sysclk_ps, fclk_ps);
if (status < 0) {
printk(error, "async", status);
goto done;
}
status = tusb_set_sync_mode(sysclk_ps, fclk_ps);
if (status < 0)
printk(error, "sync", status);
done:
return status;
}
static unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
{
unsigned long tick_ps;
/* Calculate in picosecs to yield more exact results */
tick_ps = gpmc_get_fclk_period();
return (time_ns * 1000 + tick_ps - 1) / tick_ps;
}