diff --git a/Documentation/devicetree/bindings/arm/msm/clock-controller-dummy.txt b/Documentation/devicetree/bindings/arm/msm/clock-controller-dummy.txt index fff8c9e20a1b..c6db837fa137 100644 --- a/Documentation/devicetree/bindings/arm/msm/clock-controller-dummy.txt +++ b/Documentation/devicetree/bindings/arm/msm/clock-controller-dummy.txt @@ -9,9 +9,14 @@ Required properties: - #clock_cells: Must be <1>. This will allow the common clock device tree framework to recognize _this_ device node as a clock provider. +Optional properties: +- #reset-cells: Must be <1>. This will allow the common reset device + tree framework to recognize _this_ device node as a + reset controller provider. Example: clock_rpm: qcom,rpmcc { compatible = "qcom,dummycc"; #clock-cells = <1>; + #reset-cells = <1>; }; diff --git a/drivers/clk/qcom/clk-dummy.c b/drivers/clk/qcom/clk-dummy.c index 3205fbc6b8ba..b62277e74f68 100644 --- a/drivers/clk/qcom/clk-dummy.c +++ b/drivers/clk/qcom/clk-dummy.c @@ -15,14 +15,18 @@ #include #include #include +#include struct clk_dummy { struct clk_hw hw; + struct reset_controller_dev reset; unsigned long rrate; }; #define to_clk_dummy(_hw) container_of(_hw, struct clk_dummy, hw) +#define RESET_MAX 100 + static int dummy_clk_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { @@ -58,15 +62,35 @@ struct clk_ops clk_dummy_ops = { }; EXPORT_SYMBOL_GPL(clk_dummy_ops); +static int dummy_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + pr_debug("%s\n", __func__); + return 0; +} + +static int dummy_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + pr_debug("%s\n", __func__); + return 0; +} + +static struct reset_control_ops dummy_reset_ops = { + .assert = dummy_reset_assert, + .deassert = dummy_reset_deassert, +}; + /** * clk_register_dummy - register dummy clock with the * clock framework * @dev: device that is registering this clock * @name: name of this clock * @flags: framework-specific flags + * @node: device node */ static struct clk *clk_register_dummy(struct device *dev, const char *name, - unsigned long flags) + unsigned long flags, struct device_node *node) { struct clk_dummy *dummy; struct clk *clk; @@ -85,8 +109,20 @@ static struct clk *clk_register_dummy(struct device *dev, const char *name, /* register the clock */ clk = clk_register(dev, &dummy->hw); - if (IS_ERR(clk)) + if (IS_ERR(clk)) { kfree(dummy); + return clk; + } + + dummy->reset.of_node = node; + dummy->reset.ops = &dummy_reset_ops; + dummy->reset.nr_resets = RESET_MAX; + + if (reset_controller_register(&dummy->reset)) + pr_err("Failed to register reset controller for %s\n", name); + else + pr_info("Successfully registered a dummy reset controller for %s\n", + name); return clk; } @@ -101,10 +137,15 @@ static void of_dummy_clk_setup(struct device_node *node) of_property_read_string(node, "clock-output-names", &clk_name); - clk = clk_register_dummy(NULL, clk_name, 0); + clk = clk_register_dummy(NULL, clk_name, 0, node); if (!IS_ERR(clk)) of_clk_add_provider(node, of_clk_src_simple_get, clk); + else { + pr_err("Failed to register dummy clock controller for %s\n", + clk_name); + return; + } - pr_info("%s: Dummy clock registered\n", clk_name); + pr_info("Successfully registered dummy clock for %s\n", clk_name); } CLK_OF_DECLARE(dummy_clk, "qcom,dummycc", of_dummy_clk_setup);