phy: qcom-qmp: Expose provided clocks to DT

Register a simple clock provider for the PHY pipe clock sources so that
device tree users can point at these clocks via phandles to the lane
nodes.

Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 8204d55..b400681 100644 (file)
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -1542,6 +1542,11 @@ static int qcom_qmp_phy_clk_init(struct device *dev)
        return devm_clk_bulk_get(dev, num, qmp->clks);
 }
 
+static void phy_pipe_clk_release_provider(void *res)
+{
+       of_clk_del_provider(res);
+}
+
 /*
  * Register a fixed rate pipe clock.
  *
@@ -1588,7 +1593,23 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
        fixed->fixed_rate = 125000000;
        fixed->hw.init = &init;
 
-       return devm_clk_hw_register(qmp->dev, &fixed->hw);
+       ret = devm_clk_hw_register(qmp->dev, &fixed->hw);
+       if (ret)
+               return ret;
+
+       ret = of_clk_add_hw_provider(np, of_clk_hw_simple_get, &fixed->hw);
+       if (ret)
+               return ret;
+
+       /*
+        * Roll a devm action because the clock provider is the child node, but
+        * the child node is not actually a device.
+        */
+       ret = devm_add_action(qmp->dev, phy_pipe_clk_release_provider, np);
+       if (ret)
+               phy_pipe_clk_release_provider(np);
+
+       return ret;
 }
 
 static const struct phy_ops qcom_qmp_phy_gen_ops = {