firmware: exynos-acpm: register ACPM clocks pdev

Register by hand a platform device for the ACPM clocks.
The ACPM clocks are not modeled as a DT child of ACPM because:
1/ they don't have their own resources.
2/ they are not a block that can be reused. The clock identifying
   data is reduced (clock ID, clock name and mailbox channel ID)
   and may differ from a SoC to another.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Tested-by: Peter Griffin <peter.griffin@linaro.org> # on gs101-oriole
Link: https://patch.msgid.link/20251010-acpm-clk-v6-3-321ee8826fd4@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: ambarus

drivers/firmware/samsung/exynos-acpm.c

@@ -177,9 +177,11 @@ struct acpm_info {
 /**
  * struct acpm_match_data - of_device_id data.
  * @initdata_base:	offset in SRAM where the channels configuration resides.
+ * @acpm_clk_dev_name:	base name for the ACPM clocks device that we're registering.
  */
 struct acpm_match_data {
 	loff_t initdata_base;
+	const char *acpm_clk_dev_name;
 };
 
 #define client_to_acpm_chan(c) container_of(c, struct acpm_chan, cl)
@@ -604,9 +606,15 @@ static void acpm_setup_ops(struct acpm_info *acpm)
 	pmic_ops->update_reg = acpm_pmic_update_reg;
 }
 
+static void acpm_clk_pdev_unregister(void *data)
+{
+	platform_device_unregister(data);
+}
+
 static int acpm_probe(struct platform_device *pdev)
 {
 	const struct acpm_match_data *match_data;
+	struct platform_device *acpm_clk_pdev;
 	struct device *dev = &pdev->dev;
 	struct device_node *shmem;
 	struct acpm_info *acpm;
@@ -647,6 +655,18 @@ static int acpm_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, acpm);
 
+	acpm_clk_pdev = platform_device_register_data(dev,
+						match_data->acpm_clk_dev_name,
+						PLATFORM_DEVID_NONE, NULL, 0);
+	if (IS_ERR(acpm_clk_pdev))
+		return dev_err_probe(dev, PTR_ERR(acpm_clk_pdev),
+				     "Failed to register ACPM clocks device.\n");
+
+	ret = devm_add_action_or_reset(dev, acpm_clk_pdev_unregister,
+				       acpm_clk_pdev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add devm action.\n");
+
 	return devm_of_platform_populate(dev);
 }
 
@@ -746,6 +766,7 @@ EXPORT_SYMBOL_GPL(devm_acpm_get_by_node);
 
 static const struct acpm_match_data acpm_gs101 = {
 	.initdata_base = ACPM_GS101_INITDATA_BASE,
+	.acpm_clk_dev_name = "gs101-acpm-clk",
 };
 
 static const struct of_device_id acpm_match[] = {