diff options
Diffstat (limited to 'drivers/clocksource/dw_apb_timer_of.c')
| -rw-r--r-- | drivers/clocksource/dw_apb_timer_of.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index fabaa29cc3a4..db410acd8964 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -22,6 +22,7 @@ #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/clk.h> +#include <linux/reset.h> #include <linux/sched_clock.h> static void __init timer_get_base_and_rate(struct device_node *np, @@ -29,6 +30,7 @@ static void __init timer_get_base_and_rate(struct device_node *np, { struct clk *timer_clk; struct clk *pclk; + struct reset_control *rstc; *base = of_iomap(np, 0); @@ -36,6 +38,16 @@ static void __init timer_get_base_and_rate(struct device_node *np, panic("Unable to map regs for %pOFn", np); /* + * Reset the timer if the reset control is available, wiping + * out the state the firmware may have left it + */ + rstc = of_reset_control_get(np, NULL); + if (!IS_ERR(rstc)) { + reset_control_assert(rstc); + reset_control_deassert(rstc); + } + + /* * Not all implementations use a periphal clock, so don't panic * if it's not present */ |