From: Manikandan K Pillai <mpillai@cadence.com>

Move the functions for platform common tasks to a separate file. The
common library functions and functions specific to platform are
now in different files.

Signed-off-by: Manikandan K Pillai <mpillai@cadence.com>
Co-developed-by: Hans Zhang <hans.zhang@cixtech.com>
Signed-off-by: Hans Zhang <hans.zhang@cixtech.com>
---
 drivers/pci/controller/cadence/Makefile       |   2 +-
 .../controller/cadence/pcie-cadence-common.c  | 141 ++++++++++++++++++
 drivers/pci/controller/cadence/pcie-cadence.c | 129 ----------------
 3 files changed, 142 insertions(+), 130 deletions(-)
 create mode 100644 drivers/pci/controller/cadence/pcie-cadence-common.c

diff --git a/drivers/pci/controller/cadence/Makefile b/drivers/pci/controller/cadence/Makefile
index e45f72388bbb..b104562fb86a 100644
--- a/drivers/pci/controller/cadence/Makefile
+++ b/drivers/pci/controller/cadence/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_PCIE_CADENCE) += pcie-cadence.o
+obj-$(CONFIG_PCIE_CADENCE) += pcie-cadence-common.o pcie-cadence.o
 obj-$(CONFIG_PCIE_CADENCE_HOST) += pcie-cadence-host-common.o pcie-cadence-host.o
 obj-$(CONFIG_PCIE_CADENCE_EP) += pcie-cadence-ep-common.o pcie-cadence-ep.o
 obj-$(CONFIG_PCIE_CADENCE_PLAT) += pcie-cadence-plat.o
diff --git a/drivers/pci/controller/cadence/pcie-cadence-common.c b/drivers/pci/controller/cadence/pcie-cadence-common.c
new file mode 100644
index 000000000000..e14d53d64bf1
--- /dev/null
+++ b/drivers/pci/controller/cadence/pcie-cadence-common.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017 Cadence
+// Cadence PCIe controller driver.
+// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+
+#include "pcie-cadence.h"
+
+void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
+{
+	int i = pcie->phy_count;
+
+	while (i--) {
+		phy_power_off(pcie->phy[i]);
+		phy_exit(pcie->phy[i]);
+	}
+}
+EXPORT_SYMBOL_GPL(cdns_pcie_disable_phy);
+
+int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < pcie->phy_count; i++) {
+		ret = phy_init(pcie->phy[i]);
+		if (ret < 0)
+			goto err_phy;
+
+		ret = phy_power_on(pcie->phy[i]);
+		if (ret < 0) {
+			phy_exit(pcie->phy[i]);
+			goto err_phy;
+		}
+	}
+
+	return 0;
+
+err_phy:
+	while (--i >= 0) {
+		phy_power_off(pcie->phy[i]);
+		phy_exit(pcie->phy[i]);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cdns_pcie_enable_phy);
+
+int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
+{
+	struct device_node *np = dev->of_node;
+	int phy_count;
+	struct phy **phy;
+	struct device_link **link;
+	int i;
+	int ret;
+	const char *name;
+
+	phy_count = of_property_count_strings(np, "phy-names");
+	if (phy_count < 1) {
+		dev_info(dev, "no \"phy-names\" property found; PHY will not be initialized\n");
+		pcie->phy_count = 0;
+		return 0;
+	}
+
+	phy = devm_kcalloc(dev, phy_count, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	link = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL);
+	if (!link)
+		return -ENOMEM;
+
+	for (i = 0; i < phy_count; i++) {
+		of_property_read_string_index(np, "phy-names", i, &name);
+		phy[i] = devm_phy_get(dev, name);
+		if (IS_ERR(phy[i])) {
+			ret = PTR_ERR(phy[i]);
+			goto err_phy;
+		}
+		link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
+		if (!link[i]) {
+			devm_phy_put(dev, phy[i]);
+			ret = -EINVAL;
+			goto err_phy;
+		}
+	}
+
+	pcie->phy_count = phy_count;
+	pcie->phy = phy;
+	pcie->link = link;
+
+	ret =  cdns_pcie_enable_phy(pcie);
+	if (ret)
+		goto err_phy;
+
+	return 0;
+
+err_phy:
+	while (--i >= 0) {
+		device_link_del(link[i]);
+		devm_phy_put(dev, phy[i]);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cdns_pcie_init_phy);
+
+static int cdns_pcie_suspend_noirq(struct device *dev)
+{
+	struct cdns_pcie *pcie = dev_get_drvdata(dev);
+
+	cdns_pcie_disable_phy(pcie);
+
+	return 0;
+}
+
+static int cdns_pcie_resume_noirq(struct device *dev)
+{
+	struct cdns_pcie *pcie = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cdns_pcie_enable_phy(pcie);
+	if (ret) {
+		dev_err(dev, "failed to enable PHY\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+const struct dev_pm_ops cdns_pcie_pm_ops = {
+	NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,
+				  cdns_pcie_resume_noirq)
+};
+EXPORT_SYMBOL_GPL(cdns_pcie_pm_ops);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence PCIe controller driver");
diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c
index 5603f214f4c7..51c9bc4eb174 100644
--- a/drivers/pci/controller/cadence/pcie-cadence.c
+++ b/drivers/pci/controller/cadence/pcie-cadence.c
@@ -152,135 +152,6 @@ void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r)
 }
 EXPORT_SYMBOL_GPL(cdns_pcie_reset_outbound_region);
 
-void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
-{
-	int i = pcie->phy_count;
-
-	while (i--) {
-		phy_power_off(pcie->phy[i]);
-		phy_exit(pcie->phy[i]);
-	}
-}
-EXPORT_SYMBOL_GPL(cdns_pcie_disable_phy);
-
-int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
-{
-	int ret;
-	int i;
-
-	for (i = 0; i < pcie->phy_count; i++) {
-		ret = phy_init(pcie->phy[i]);
-		if (ret < 0)
-			goto err_phy;
-
-		ret = phy_power_on(pcie->phy[i]);
-		if (ret < 0) {
-			phy_exit(pcie->phy[i]);
-			goto err_phy;
-		}
-	}
-
-	return 0;
-
-err_phy:
-	while (--i >= 0) {
-		phy_power_off(pcie->phy[i]);
-		phy_exit(pcie->phy[i]);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(cdns_pcie_enable_phy);
-
-int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
-{
-	struct device_node *np = dev->of_node;
-	int phy_count;
-	struct phy **phy;
-	struct device_link **link;
-	int i;
-	int ret;
-	const char *name;
-
-	phy_count = of_property_count_strings(np, "phy-names");
-	if (phy_count < 1) {
-		dev_info(dev, "no \"phy-names\" property found; PHY will not be initialized\n");
-		pcie->phy_count = 0;
-		return 0;
-	}
-
-	phy = devm_kcalloc(dev, phy_count, sizeof(*phy), GFP_KERNEL);
-	if (!phy)
-		return -ENOMEM;
-
-	link = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL);
-	if (!link)
-		return -ENOMEM;
-
-	for (i = 0; i < phy_count; i++) {
-		of_property_read_string_index(np, "phy-names", i, &name);
-		phy[i] = devm_phy_get(dev, name);
-		if (IS_ERR(phy[i])) {
-			ret = PTR_ERR(phy[i]);
-			goto err_phy;
-		}
-		link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
-		if (!link[i]) {
-			devm_phy_put(dev, phy[i]);
-			ret = -EINVAL;
-			goto err_phy;
-		}
-	}
-
-	pcie->phy_count = phy_count;
-	pcie->phy = phy;
-	pcie->link = link;
-
-	ret =  cdns_pcie_enable_phy(pcie);
-	if (ret)
-		goto err_phy;
-
-	return 0;
-
-err_phy:
-	while (--i >= 0) {
-		device_link_del(link[i]);
-		devm_phy_put(dev, phy[i]);
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(cdns_pcie_init_phy);
-
-static int cdns_pcie_suspend_noirq(struct device *dev)
-{
-	struct cdns_pcie *pcie = dev_get_drvdata(dev);
-
-	cdns_pcie_disable_phy(pcie);
-
-	return 0;
-}
-
-static int cdns_pcie_resume_noirq(struct device *dev)
-{
-	struct cdns_pcie *pcie = dev_get_drvdata(dev);
-	int ret;
-
-	ret = cdns_pcie_enable_phy(pcie);
-	if (ret) {
-		dev_err(dev, "failed to enable PHY\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-const struct dev_pm_ops cdns_pcie_pm_ops = {
-	NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_pcie_suspend_noirq,
-				  cdns_pcie_resume_noirq)
-};
-EXPORT_SYMBOL_GPL(cdns_pcie_pm_ops);
-
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Cadence PCIe controller driver");
 MODULE_AUTHOR("Cyrille Pitchen <cyrille.pitchen@free-electrons.com>");
-- 
2.49.0

On Tue, Aug 19, 2025 at 07:52:31PM GMT, hans.zhang@cixtech.com wrote:
> From: Manikandan K Pillai <mpillai@cadence.com>
> 
> Move the functions for platform common tasks to a separate file. The
> common library functions and functions specific to platform are
> now in different files.
> 

Why do we have too many library files? What is the need to split
pcie-cadence-common.c which itself is a library?

> Signed-off-by: Manikandan K Pillai <mpillai@cadence.com>
> Co-developed-by: Hans Zhang <hans.zhang@cixtech.com>
> Signed-off-by: Hans Zhang <hans.zhang@cixtech.com>
> ---
>  drivers/pci/controller/cadence/Makefile       |   2 +-
>  .../controller/cadence/pcie-cadence-common.c  | 141 ++++++++++++++++++
>  drivers/pci/controller/cadence/pcie-cadence.c | 129 ----------------
>  3 files changed, 142 insertions(+), 130 deletions(-)
>  create mode 100644 drivers/pci/controller/cadence/pcie-cadence-common.c
> 
> diff --git a/drivers/pci/controller/cadence/Makefile b/drivers/pci/controller/cadence/Makefile
> index e45f72388bbb..b104562fb86a 100644
> --- a/drivers/pci/controller/cadence/Makefile
> +++ b/drivers/pci/controller/cadence/Makefile
> @@ -1,5 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
> -obj-$(CONFIG_PCIE_CADENCE) += pcie-cadence.o
> +obj-$(CONFIG_PCIE_CADENCE) += pcie-cadence-common.o pcie-cadence.o
>  obj-$(CONFIG_PCIE_CADENCE_HOST) += pcie-cadence-host-common.o pcie-cadence-host.o
>  obj-$(CONFIG_PCIE_CADENCE_EP) += pcie-cadence-ep-common.o pcie-cadence-ep.o
>  obj-$(CONFIG_PCIE_CADENCE_PLAT) += pcie-cadence-plat.o
> diff --git a/drivers/pci/controller/cadence/pcie-cadence-common.c b/drivers/pci/controller/cadence/pcie-cadence-common.c
> new file mode 100644
> index 000000000000..e14d53d64bf1
> --- /dev/null
> +++ b/drivers/pci/controller/cadence/pcie-cadence-common.c
> @@ -0,0 +1,141 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (c) 2017 Cadence
> +// Cadence PCIe controller driver.
> +// Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>

We use below style for multi line comments:

	/*
	 *
	 */

So even though this style existed, you should change it in all new files.

> +
> +#include <linux/kernel.h>
> +#include <linux/of.h>
> +
> +#include "pcie-cadence.h"
> +
> +void cdns_pcie_disable_phy(struct cdns_pcie *pcie)
> +{
> +	int i = pcie->phy_count;
> +
> +	while (i--) {
> +		phy_power_off(pcie->phy[i]);
> +		phy_exit(pcie->phy[i]);
> +	}
> +}
> +EXPORT_SYMBOL_GPL(cdns_pcie_disable_phy);
> +
> +int cdns_pcie_enable_phy(struct cdns_pcie *pcie)
> +{
> +	int ret;
> +	int i;
> +
> +	for (i = 0; i < pcie->phy_count; i++) {
> +		ret = phy_init(pcie->phy[i]);
> +		if (ret < 0)
> +			goto err_phy;
> +
> +		ret = phy_power_on(pcie->phy[i]);
> +		if (ret < 0) {
> +			phy_exit(pcie->phy[i]);
> +			goto err_phy;
> +		}
> +	}
> +
> +	return 0;
> +
> +err_phy:
> +	while (--i >= 0) {
> +		phy_power_off(pcie->phy[i]);
> +		phy_exit(pcie->phy[i]);
> +	}
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL_GPL(cdns_pcie_enable_phy);
> +
> +int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie)
> +{
> +	struct device_node *np = dev->of_node;
> +	int phy_count;
> +	struct phy **phy;
> +	struct device_link **link;
> +	int i;
> +	int ret;
> +	const char *name;
> +
> +	phy_count = of_property_count_strings(np, "phy-names");
> +	if (phy_count < 1) {
> +		dev_info(dev, "no \"phy-names\" property found; PHY will not be initialized\n");
> +		pcie->phy_count = 0;
> +		return 0;
> +	}
> +
> +	phy = devm_kcalloc(dev, phy_count, sizeof(*phy), GFP_KERNEL);
> +	if (!phy)
> +		return -ENOMEM;
> +
> +	link = devm_kcalloc(dev, phy_count, sizeof(*link), GFP_KERNEL);
> +	if (!link)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < phy_count; i++) {
> +		of_property_read_string_index(np, "phy-names", i, &name);
> +		phy[i] = devm_phy_get(dev, name);
> +		if (IS_ERR(phy[i])) {
> +			ret = PTR_ERR(phy[i]);
> +			goto err_phy;
> +		}
> +		link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
> +		if (!link[i]) {
> +			devm_phy_put(dev, phy[i]);
> +			ret = -EINVAL;
> +			goto err_phy;
> +		}
> +	}
> +
> +	pcie->phy_count = phy_count;
> +	pcie->phy = phy;
> +	pcie->link = link;
> +
> +	ret =  cdns_pcie_enable_phy(pcie);

Double space after =

- Mani

-- 
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