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But, to guarantee the backward-compatibility, keep the support 'devfreq-events' property. Signed-off-by: Chanwoo Choi --- .../bindings/devfreq/exynos-bus.txt | 6 ++-- drivers/devfreq/exynos-bus.c | 32 ++++++++++++++----- 2 files changed, 27 insertions(+), 11 deletions(-) diff --git a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt index c948cee01124..c6c2dd0e77c8 100644 --- a/Documentation/devicetree/bindings/devfreq/exynos-bus.txt +++ b/Documentation/devicetree/bindings/devfreq/exynos-bus.txt @@ -41,7 +41,7 @@ Required properties for all bus devices: Required properties only for parent bus device: - vdd-supply: the regulator to provide the buses with the voltage. -- devfreq-events: the devfreq-event device to monitor the current utilization +- exynos,ppmu-device: the devfreq-event device to monitor the current utilization of buses. Required properties only for passive bus device: @@ -374,13 +374,13 @@ Example2 : in exynos3250-rinato.dts is listed below: &bus_dmc { - devfreq-events = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>; + exynos,ppmu-device = <&ppmu_dmc0_3>, <&ppmu_dmc1_3>; vdd-supply = <&buck1_reg>; /* VDD_MIF */ status = "okay"; }; &bus_leftbus { - devfreq-events = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>; + exynos,ppmu-device = <&ppmu_leftbus_3>, <&ppmu_rightbus_3>; vdd-supply = <&buck3_reg>; status = "okay"; }; diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 60d61b168153..0683bee64eb6 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -165,11 +165,18 @@ static struct devfreq *get_parent_devfreq_by_node(struct device_node *np) static struct devfreq_event_dev *get_edev_by_node(struct device_node *np, int index) { - struct device_node *node = of_parse_phandle(np, "devfreq-events", - index); + struct device_node *node = of_parse_phandle(np, + "exynos,ppmu-device", index); - if (!node) - return ERR_PTR(-ENODEV); + if (!node) { + /* + * Check the deprecated 'devfreq-events' property + * to support backward-compatibility. + */ + node = of_parse_phandle(np, "devfreq-events", index); + if (!node) + return ERR_PTR(-ENODEV); + } return devfreq_event_get_edev_by_node(node); } @@ -220,11 +227,20 @@ static int exynos_bus_parent_parse_of(struct device_node *np, * buses. This raw data will be used in devfreq ondemand governor. */ count = of_property_count_elems_of_size(dev->of_node, - "devfreq-events", sizeof(u32)); + "exynos,ppmu-device", sizeof(u32)); if (count < 0) { - dev_err(dev, "failed to get the count of devfreq-event dev\n"); - ret = count; - goto err_regulator; + /* + * Check the deprecated 'devfreq-events' property + * to support backward-compatibility. + */ + count = of_property_count_elems_of_size(dev->of_node, + "devfreq-events", sizeof(u32)); + if (count < 0) { + dev_err(dev, + "failed to get the count of devfreq-event dev\n"); + ret = count; + goto err_regulator; + } } bus->edev_count = count;