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timer: cadence: Implement timer_get_boot_us

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This function is required for adding bootstage support.
Also enable it directly for ZynqMP R5 configuration.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2018-04-18 14:03:56 +02:00
parent 3c1eaec012
commit 56c0e646c4
2 changed files with 24 additions and 0 deletions
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2
configs/xilinx_zynqmp_r5_defconfig
View file

@ -5,10 +5,12 @@ CONFIG_DEBUG_UART_BASE=0xff010000
CONFIG_DEBUG_UART_CLOCK=100000000
CONFIG_DEFAULT_DEVICE_TREE="zynqmp-r5"
CONFIG_DEBUG_UART=y
CONFIG_BOOTSTAGE=y
# CONFIG_DISPLAY_CPUINFO is not set
CONFIG_SYS_PROMPT="ZynqMP r5> "
# CONFIG_CMD_FLASH is not set
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_BOOTSTAGE=y
CONFIG_OF_EMBED=y
CONFIG_DEBUG_UART_ZYNQ=y
CONFIG_ZYNQ_SERIAL=y

22
drivers/timer/cadence-ttc.c
View file

@ -31,6 +31,28 @@ struct cadence_ttc_priv {
struct cadence_ttc_regs *regs;
};
#if CONFIG_IS_ENABLED(BOOTSTAGE)
ulong timer_get_boot_us(void)
{
u64 ticks = 0;
u32 rate = 1;
u64 us;
int ret;
ret = dm_timer_init();
if (!ret) {
/* The timer is available */
rate = timer_get_rate(gd->timer);
timer_get_count(gd->timer, &ticks);
} else {
return 0;
}
us = (ticks * 1000) / rate;
return us;
}
#endif
static int cadence_ttc_get_count(struct udevice *dev, u64 *count)
{
struct cadence_ttc_priv *priv = dev_get_priv(dev);