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Subject[PATCH 5/8] clocksource: timer-ti-32k: Register the persistent clock
Date
Since the 32K counter is always available, then we can register the
persistent clock to compensate the suspend time for the OS time.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
---
drivers/clocksource/Kconfig | 1 +
drivers/clocksource/timer-ti-32k.c | 4 ++++
2 files changed, 5 insertions(+)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 5e51fcf..3cd136f 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -262,6 +262,7 @@ config CLKSRC_TI_32K
bool "Texas Instruments 32.768 Hz Clocksource" if COMPILE_TEST
depends on GENERIC_SCHED_CLOCK
select TIMER_OF if OF
+ select PERSISTENT_CLOCK
help
This option enables support for Texas Instruments 32.768 Hz clocksource
available on many OMAP-like platforms.
diff --git a/drivers/clocksource/timer-ti-32k.c b/drivers/clocksource/timer-ti-32k.c
index 880a861..353ff9d 100644
--- a/drivers/clocksource/timer-ti-32k.c
+++ b/drivers/clocksource/timer-ti-32k.c
@@ -41,6 +41,7 @@
#include <linux/clocksource.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/persistent_clock.h>

/*
* 32KHz clocksource ... always available, on pretty most chips except
@@ -120,6 +121,9 @@ static int __init ti_32k_timer_init(struct device_node *np)
}

sched_clock_register(omap_32k_read_sched_clock, 32, 32768);
+ persistent_clock_init_and_register(omap_32k_read_sched_clock,
+ CLOCKSOURCE_MASK(32), 32768, 0);
+
pr_info("OMAP clocksource: 32k_counter at 32768 Hz\n");

return 0;
--
1.7.9.5
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