Merge tag 'qcom-drivers-for-4.10-2' of...

Merge tag 'qcom-drivers-for-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers

Pull "Qualcomm ARM Based Driver Updates for v4.10 - Part 2" from Andy Gross:

* Fixup QCOM SCM to support MSM8996

* tag 'qcom-drivers-for-4.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  firmware: qcom: scm: Return PTR_ERR when devm_clk_get fails
  firmware: qcom: scm: Remove core, iface and bus clocks dependency
  dt-bindings: firmware: scm: Add MSM8996 DT bindings

Documentation/devicetree/bindings/firmware/qcom,scm.txt

@@ -10,8 +10,10 @@ Required properties:
  * "qcom,scm-apq8064" for APQ8064 platforms
  * "qcom,scm-msm8660" for MSM8660 platforms
  * "qcom,scm-msm8690" for MSM8690 platforms
+ * "qcom,scm-msm8996" for MSM8996 platforms
  * "qcom,scm" for later processors (MSM8916, APQ8084, MSM8974, etc)
 - clocks: One to three clocks may be required based on compatible.
+ * No clock required for "qcom,scm-msm8996"
  * Only core clock required for "qcom,scm-apq8064", "qcom,scm-msm8660", and "qcom,scm-msm8960"
  * Core, iface, and bus clocks required for "qcom,scm"
 - clock-names: Must contain "core" for the core clock, "iface" for the interface

drivers/firmware/qcom_scm.c

@@ -28,6 +28,10 @@
 
 #include "qcom_scm.h"
 
+#define SCM_HAS_CORE_CLK	BIT(0)
+#define SCM_HAS_IFACE_CLK	BIT(1)
+#define SCM_HAS_BUS_CLK		BIT(2)
+
 struct qcom_scm {
 	struct device *dev;
 	struct clk *core_clk;
@@ -323,32 +327,40 @@ EXPORT_SYMBOL(qcom_scm_is_available);
 static int qcom_scm_probe(struct platform_device *pdev)
 {
 	struct qcom_scm *scm;
+	unsigned long clks;
 	int ret;
 
 	scm = devm_kzalloc(&pdev->dev, sizeof(*scm), GFP_KERNEL);
 	if (!scm)
 		return -ENOMEM;
 
+	clks = (unsigned long)of_device_get_match_data(&pdev->dev);
+	if (clks & SCM_HAS_CORE_CLK) {
 		scm->core_clk = devm_clk_get(&pdev->dev, "core");
 		if (IS_ERR(scm->core_clk)) {
-		if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
+			if (PTR_ERR(scm->core_clk) != -EPROBE_DEFER)
+				dev_err(&pdev->dev,
+					"failed to acquire core clk\n");
 			return PTR_ERR(scm->core_clk);
-
-		scm->core_clk = NULL;
+		}
 	}
 
-	if (of_device_is_compatible(pdev->dev.of_node, "qcom,scm")) {
+	if (clks & SCM_HAS_IFACE_CLK) {
 		scm->iface_clk = devm_clk_get(&pdev->dev, "iface");
 		if (IS_ERR(scm->iface_clk)) {
 			if (PTR_ERR(scm->iface_clk) != -EPROBE_DEFER)
-				dev_err(&pdev->dev, "failed to acquire iface clk\n");
+				dev_err(&pdev->dev,
+					"failed to acquire iface clk\n");
 			return PTR_ERR(scm->iface_clk);
 		}
+	}
 
+	if (clks & SCM_HAS_BUS_CLK) {
 		scm->bus_clk = devm_clk_get(&pdev->dev, "bus");
 		if (IS_ERR(scm->bus_clk)) {
 			if (PTR_ERR(scm->bus_clk) != -EPROBE_DEFER)
-				dev_err(&pdev->dev, "failed to acquire bus clk\n");
+				dev_err(&pdev->dev,
+					"failed to acquire bus clk\n");
 			return PTR_ERR(scm->bus_clk);
 		}
 	}
@@ -374,10 +386,23 @@ static int qcom_scm_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_scm_dt_match[] = {
-	{ .compatible = "qcom,scm-apq8064",},
-	{ .compatible = "qcom,scm-msm8660",},
-	{ .compatible = "qcom,scm-msm8960",},
-	{ .compatible = "qcom,scm",},
+	{ .compatible = "qcom,scm-apq8064",
+	  .data = (void *) SCM_HAS_CORE_CLK,
+	},
+	{ .compatible = "qcom,scm-msm8660",
+	  .data = (void *) SCM_HAS_CORE_CLK,
+	},
+	{ .compatible = "qcom,scm-msm8960",
+	  .data = (void *) SCM_HAS_CORE_CLK,
+	},
+	{ .compatible = "qcom,scm-msm8996",
+	  .data = NULL, /* no clocks */
+	},
+	{ .compatible = "qcom,scm",
+	  .data = (void *)(SCM_HAS_CORE_CLK
+			   | SCM_HAS_IFACE_CLK
+			   | SCM_HAS_BUS_CLK),
+	},
 	{}
 };