diff options
Diffstat (limited to 'drivers/clocksource/arm_architected_timer.c')
-rw-r--r-- | drivers/clocksource/arm_architected_timer.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/clocksource/arm_architected_timer.c b/drivers/clocksource/arm_architected_timer.c new file mode 100644 index 0000000000..3ca7dfd17d --- /dev/null +++ b/drivers/clocksource/arm_architected_timer.c @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2018 Sascha Hauer <s.hauer@pengutronix.de> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <common.h> +#include <init.h> +#include <clock.h> +#include <linux/clk.h> +#include <io.h> +#include <asm/system.h> + +static uint64_t arm_arch_clocksource_read(void) +{ + return get_cntpct(); +} + +static struct clocksource cs = { + .read = arm_arch_clocksource_read, + .mask = CLOCKSOURCE_MASK(64), + .shift = 0, +}; + +static int arm_arch_timer_probe(struct device_d *dev) +{ + cs.mult = clocksource_hz2mult(get_cntfrq(), cs.shift); + + return init_clock(&cs); +} + +static struct of_device_id arm_arch_timer_dt_ids[] = { + { .compatible = "arm,armv7-timer", }, + { .compatible = "arm,armv8-timer", }, + { } +}; + +static struct driver_d arm_arch_timer_driver = { + .name = "arm-architected-timer", + .probe = arm_arch_timer_probe, + .of_compatible = DRV_OF_COMPAT(arm_arch_timer_dt_ids), +}; +postcore_platform_driver(arm_arch_timer_driver); |