diff mbox series

[1/3] firmware: qcom_scm: Always try to consume all three clocks

Message ID 20230623-topic-scm_cleanup-v1-1-383089eae98d@linaro.org
State Accepted
Commit 5130464a14d382c30662faf090fd2be11558183a
Headers show
Series Drop useless compatibles from the SCM driver | expand

Commit Message

Konrad Dybcio June 23, 2023, 9:49 p.m. UTC
The code for handling more than 1 clock is a bit messy and requires
one to add new, SoC-specific compatibles if one wants to attach a clock.

Switch devm_clk_get to devm_clk_get_optional to prevent throwing it
from throwing errors when the clock is absent and defer checking the
clock requirements to dt schema.

This lets us get rid of compatibles that aren't necessary for backwards
compatibility *and* will hopefully prevent the addition of meaningless
new compatibles.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/firmware/qcom_scm.c | 70 +++++++++------------------------------------
 1 file changed, 13 insertions(+), 57 deletions(-)
diff mbox series

Patch

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index fde33acd46b7..dfa298347041 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -26,10 +26,6 @@ 
 static bool download_mode = IS_ENABLED(CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT);
 module_param(download_mode, bool, 0);
 
-#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;
@@ -1425,43 +1421,22 @@  static int qcom_scm_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(scm->path),
 				     "failed to acquire interconnect path\n");
 
-	scm->core_clk = devm_clk_get(&pdev->dev, "core");
+	scm->core_clk = devm_clk_get_optional(&pdev->dev, "core");
 	if (IS_ERR(scm->core_clk)) {
 		if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
 			return PTR_ERR(scm->core_clk);
-
-		if (clks & SCM_HAS_CORE_CLK) {
-			dev_err(&pdev->dev, "failed to acquire core clk\n");
-			return PTR_ERR(scm->core_clk);
-		}
-
-		scm->core_clk = NULL;
 	}
 
-	scm->iface_clk = devm_clk_get(&pdev->dev, "iface");
+	scm->iface_clk = devm_clk_get_optional(&pdev->dev, "iface");
 	if (IS_ERR(scm->iface_clk)) {
 		if (PTR_ERR(scm->iface_clk) == -EPROBE_DEFER)
 			return PTR_ERR(scm->iface_clk);
-
-		if (clks & SCM_HAS_IFACE_CLK) {
-			dev_err(&pdev->dev, "failed to acquire iface clk\n");
-			return PTR_ERR(scm->iface_clk);
-		}
-
-		scm->iface_clk = NULL;
 	}
 
-	scm->bus_clk = devm_clk_get(&pdev->dev, "bus");
+	scm->bus_clk = devm_clk_get_optional(&pdev->dev, "bus");
 	if (IS_ERR(scm->bus_clk)) {
 		if (PTR_ERR(scm->bus_clk) == -EPROBE_DEFER)
 			return PTR_ERR(scm->bus_clk);
-
-		if (clks & SCM_HAS_BUS_CLK) {
-			dev_err(&pdev->dev, "failed to acquire bus clk\n");
-			return PTR_ERR(scm->bus_clk);
-		}
-
-		scm->bus_clk = NULL;
 	}
 
 	scm->reset.ops = &qcom_scm_pas_reset_ops;
@@ -1512,38 +1487,19 @@  static void qcom_scm_shutdown(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_scm_dt_match[] = {
-	{ .compatible = "qcom,scm-apq8064",
-	  /* FIXME: This should have .data = (void *) SCM_HAS_CORE_CLK */
-	},
-	{ .compatible = "qcom,scm-apq8084", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK)
-	},
+	{ .compatible = "qcom,scm-apq8064" },
+	{ .compatible = "qcom,scm-apq8084" },
 	{ .compatible = "qcom,scm-ipq4019" },
-	{ .compatible = "qcom,scm-mdm9607", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK) },
-	{ .compatible = "qcom,scm-msm8660", .data = (void *) SCM_HAS_CORE_CLK },
-	{ .compatible = "qcom,scm-msm8960", .data = (void *) SCM_HAS_CORE_CLK },
-	{ .compatible = "qcom,scm-msm8916", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK)
-	},
-	{ .compatible = "qcom,scm-msm8953", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK)
-	},
-	{ .compatible = "qcom,scm-msm8974", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK)
-	},
-	{ .compatible = "qcom,scm-msm8976", .data = (void *)(SCM_HAS_CORE_CLK |
-							     SCM_HAS_IFACE_CLK |
-							     SCM_HAS_BUS_CLK)
-	},
+	{ .compatible = "qcom,scm-mdm9607" },
+	{ .compatible = "qcom,scm-msm8660" },
+	{ .compatible = "qcom,scm-msm8960" },
+	{ .compatible = "qcom,scm-msm8916" },
+	{ .compatible = "qcom,scm-msm8953" },
+	{ .compatible = "qcom,scm-msm8974" },
+	{ .compatible = "qcom,scm-msm8976" },
 	{ .compatible = "qcom,scm-msm8994" },
 	{ .compatible = "qcom,scm-msm8996" },
-	{ .compatible = "qcom,scm-sm6375", .data = (void *)SCM_HAS_CORE_CLK },
+	{ .compatible = "qcom,scm-sm6375" },
 	{ .compatible = "qcom,scm" },
 	{}
 };