ARM: OMAP: add support for oscillator setup
This contains startup and shutdown times for the oscillator. By default
use ULONG_MAX. Oscillator setup is used for calculating and setting up
latencies for sleep modes that disable oscillator.
Based on a patch from Nishanth Menon <nm@ti.com>.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index ea61c32..109a02e 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -39,6 +39,36 @@
*/
int (*omap_pm_suspend)(void);
+/**
+ * struct omap2_oscillator - Describe the board main oscillator latencies
+ * @startup_time: oscillator startup latency
+ * @shutdown_time: oscillator shutdown latency
+ */
+struct omap2_oscillator {
+ u32 startup_time;
+ u32 shutdown_time;
+};
+
+static struct omap2_oscillator oscillator = {
+ .startup_time = ULONG_MAX,
+ .shutdown_time = ULONG_MAX,
+};
+
+void omap_pm_setup_oscillator(u32 tstart, u32 tshut)
+{
+ oscillator.startup_time = tstart;
+ oscillator.shutdown_time = tshut;
+}
+
+void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
+{
+ if (!tstart || !tshut)
+ return;
+
+ *tstart = oscillator.startup_time;
+ *tshut = oscillator.shutdown_time;
+}
+
static int __init _init_omap_device(char *name)
{
struct omap_hwmod *oh;
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 67d6613..4290288 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -129,4 +129,12 @@
}
#endif
+#ifdef CONFIG_PM
+extern void omap_pm_setup_oscillator(u32 tstart, u32 tshut);
+extern void omap_pm_get_oscillator(u32 *tstart, u32 *tshut);
+#else
+static inline void omap_pm_setup_oscillator(u32 tstart, u32 tshut) { }
+static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { }
+#endif
+
#endif