[PATCH v2 4/4] phy: qcom-qmp: Expose provided clocks to DT

[Evan Green]

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 <evgr...@chromium.org>
Reviewed-by: Stephen Boyd <swb...@chromium.org>
Tested-by: Vivek Gautam <vivek.gau...@codeaurora.org>

---

Changes in v2:
 - Rebased onto phy/next

 drivers/phy/qualcomm/phy-qcom-qmp.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c 
b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 8204d55e2d650..b4006818e1b65 100644
--- 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 = {
-- 
2.18.1