@@ -23,6 +23,24 @@
#include "opp.h"
+/*
+ * Returns opp descriptor node for a device node, caller must
+ * do of_node_put().
+ */
+static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np,
+ int index)
+{
+ /* "operating-points-v2" can be an array for power domain providers */
+ return of_parse_phandle(np, "operating-points-v2", index);
+}
+
+/* Returns opp descriptor node for a device, caller must do of_node_put() */
+struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
+{
+ return _opp_of_get_opp_desc_node(dev->of_node, 0);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
+
static struct opp_table *_managed_opp(const struct device_node *np)
{
struct opp_table *opp_table, *managed_table = NULL;
@@ -54,22 +72,35 @@ static struct opp_table *_managed_opp(const struct device_node *np)
void _of_init_opp_table(struct opp_table *opp_table, struct device *dev)
{
- struct device_node *np;
+ struct device_node *np, *opp_np;
+ u32 val;
/*
* Only required for backward compatibility with v1 bindings, but isn't
* harmful for other cases. And so we do it unconditionally.
*/
np = of_node_get(dev->of_node);
- if (np) {
- u32 val;
-
- if (!of_property_read_u32(np, "clock-latency", &val))
- opp_table->clock_latency_ns_max = val;
- of_property_read_u32(np, "voltage-tolerance",
- &opp_table->voltage_tolerance_v1);
- of_node_put(np);
- }
+ if (!np)
+ return;
+
+ if (!of_property_read_u32(np, "clock-latency", &val))
+ opp_table->clock_latency_ns_max = val;
+ of_property_read_u32(np, "voltage-tolerance",
+ &opp_table->voltage_tolerance_v1);
+
+ /* Get OPP table node */
+ opp_np = _opp_of_get_opp_desc_node(np, 0);
+ of_node_put(np);
+
+ if (!opp_np)
+ return;
+
+ if (of_property_read_bool(opp_np, "opp-shared"))
+ opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
+ else
+ opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE;
+
+ of_node_put(opp_np);
}
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
@@ -249,22 +280,6 @@ void dev_pm_opp_of_remove_table(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
-/* Returns opp descriptor node for a device node, caller must
- * do of_node_put() */
-static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np,
- int index)
-{
- /* "operating-points-v2" can be an array for power domain providers */
- return of_parse_phandle(np, "operating-points-v2", index);
-}
-
-/* Returns opp descriptor node for a device, caller must do of_node_put() */
-struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
-{
- return _opp_of_get_opp_desc_node(dev->of_node, 0);
-}
-EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
-
/**
* _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
* @opp_table: OPP table
@@ -431,11 +446,13 @@ static int _of_add_opp_table_v2(struct device *dev, struct device_node *opp_np)
if (pstate_count)
opp_table->genpd_performance_state = true;
+ /*
+ * This is used by _managed_opp() to find OPP tables that are fully
+ * initialized by other devices sharing clock/voltage rails with current
+ * device. And so we can't set this from _of_init_opp_table() as tables
+ * aren't fully initialized at that point.
+ */
opp_table->np = opp_np;
- if (of_property_read_bool(opp_np, "opp-shared"))
- opp_table->shared_opp = OPP_TABLE_ACCESS_SHARED;
- else
- opp_table->shared_opp = OPP_TABLE_ACCESS_EXCLUSIVE;
put_opp_table:
dev_pm_opp_put_opp_table(opp_table);
Parse the DT properties present in the OPP table from _of_init_opp_table(), which is a dedicated routine of DT parsing. Minor relocation of helpers was required for this. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/opp/of.c | 77 +++++++++++++++++++++++++++++------------------- 1 file changed, 47 insertions(+), 30 deletions(-) -- 2.18.0.rc1.242.g61856ae69a2c