All of lore.kernel.org
 help / color / mirror / Atom feed
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: Bjorn Helgaas <bhelgaas@google.com>
Cc: linuxarm@huawei.com, mauro.chehab@huawei.com,
	"Mauro Carvalho Chehab" <mchehab+huawei@kernel.org>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Binghui Wang" <wangbinghui@hisilicon.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Rob Herring" <robh@kernel.org>,
	"Xiaowei Song" <songxiaowei@hisilicon.com>,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: [PATCH v12 03/11] PCI: kirin: Add support for a PHY layer
Date: Tue, 28 Sep 2021 09:34:13 +0200	[thread overview]
Message-ID: <8a6d353145c0ec169d212094f5d534f93e2597f8.1632814194.git.mchehab+huawei@kernel.org> (raw)
In-Reply-To: <cover.1632814194.git.mchehab+huawei@kernel.org>

The pcie-kirin driver contains both PHY and generic PCI driver
on it.

The best would be, instead, to support a PCI PHY driver, making
the driver more generic.

However, it is too late to remove the Kirin 960 PHY, as a change
like that would make the DT schema incompatible with past versions.

So, add support for an external PHY driver without removing the
existing Kirin 960 PHY from it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---

To mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH v12 00/11] at: https://lore.kernel.org/all/cover.1632814194.git.mchehab+huawei@kernel.org/

 drivers/pci/controller/dwc/pcie-kirin.c | 95 +++++++++++++++++++++----
 1 file changed, 80 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index b4063a3434df..31514a5d4bb4 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -8,16 +8,18 @@
  * Author: Xiaowei Song <songxiaowei@huawei.com>
  */
 
-#include <linux/compiler.h>
 #include <linux/clk.h>
+#include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #include <linux/of_pci.h>
+#include <linux/phy/phy.h>
 #include <linux/pci.h>
 #include <linux/pci_regs.h>
 #include <linux/platform_device.h>
@@ -50,11 +52,18 @@
 #define PCIE_DEBOUNCE_PARAM	0xF0F400
 #define PCIE_OE_BYPASS		(0x3 << 28)
 
+enum pcie_kirin_phy_type {
+	PCIE_KIRIN_INTERNAL_PHY,
+	PCIE_KIRIN_EXTERNAL_PHY
+};
+
 struct kirin_pcie {
+	enum pcie_kirin_phy_type	type;
+
 	struct dw_pcie	*pci;
 	struct phy	*phy;
 	void __iomem	*apb_base;
-	void		*phy_priv;	/* Needed for Kirin 960 PHY */
+	void		*phy_priv;	/* only for PCIE_KIRIN_INTERNAL_PHY */
 };
 
 /*
@@ -476,8 +485,63 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
 	.host_init = kirin_pcie_host_init,
 };
 
+static int kirin_pcie_power_on(struct platform_device *pdev,
+			       struct kirin_pcie *kirin_pcie)
+{
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) {
+		ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
+		if (ret)
+			return ret;
+
+		return hi3660_pcie_phy_power_on(kirin_pcie);
+	}
+
+	kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL);
+	if (IS_ERR(kirin_pcie->phy))
+		return PTR_ERR(kirin_pcie->phy);
+
+	ret = phy_init(kirin_pcie->phy);
+	if (ret)
+		goto err;
+
+	ret = phy_power_on(kirin_pcie->phy);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	phy_exit(kirin_pcie->phy);
+	return ret;
+}
+
+static int __exit kirin_pcie_remove(struct platform_device *pdev)
+{
+	struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev);
+
+	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY)
+		return 0;
+
+	phy_power_off(kirin_pcie->phy);
+	phy_exit(kirin_pcie->phy);
+
+	return 0;
+}
+
+static const struct of_device_id kirin_pcie_match[] = {
+	{
+		.compatible = "hisilicon,kirin960-pcie",
+		.data = (void *)PCIE_KIRIN_INTERNAL_PHY
+	},
+	{},
+};
+
 static int kirin_pcie_probe(struct platform_device *pdev)
 {
+	enum pcie_kirin_phy_type phy_type;
+	const struct of_device_id *of_id;
 	struct device *dev = &pdev->dev;
 	struct kirin_pcie *kirin_pcie;
 	struct dw_pcie *pci;
@@ -488,6 +552,14 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	of_id = of_match_device(kirin_pcie_match, dev);
+	if (!of_id) {
+		dev_err(dev, "OF data missing\n");
+		return -EINVAL;
+	}
+
+	phy_type = (enum pcie_kirin_phy_type)of_id->data;
+
 	kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL);
 	if (!kirin_pcie)
 		return -ENOMEM;
@@ -500,31 +572,24 @@ static int kirin_pcie_probe(struct platform_device *pdev)
 	pci->ops = &kirin_dw_pcie_ops;
 	pci->pp.ops = &kirin_pcie_host_ops;
 	kirin_pcie->pci = pci;
-
-	ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
-	if (ret)
-		return ret;
+	kirin_pcie->type = phy_type;
 
 	ret = kirin_pcie_get_resource(kirin_pcie, pdev);
 	if (ret)
 		return ret;
 
-	ret = hi3660_pcie_phy_power_on(kirin_pcie);
-	if (ret)
-		return ret;
-
 	platform_set_drvdata(pdev, kirin_pcie);
 
+	ret = kirin_pcie_power_on(pdev, kirin_pcie);
+	if (ret)
+		return ret;
+
 	return dw_pcie_host_init(&pci->pp);
 }
 
-static const struct of_device_id kirin_pcie_match[] = {
-	{ .compatible = "hisilicon,kirin960-pcie" },
-	{},
-};
-
 static struct platform_driver kirin_pcie_driver = {
 	.probe			= kirin_pcie_probe,
+	.remove	        	= __exit_p(kirin_pcie_remove),
 	.driver			= {
 		.name			= "kirin-pcie",
 		.of_match_table		= kirin_pcie_match,
-- 
2.31.1


  parent reply	other threads:[~2021-09-28  7:34 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-28  7:34 [PATCH v12 00/11] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
2021-09-28  7:34 ` Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 01/11] phy: HiSilicon: Add driver for Kirin 970 PCIe PHY Mauro Carvalho Chehab
2021-09-28  7:34   ` Mauro Carvalho Chehab
2021-10-01  8:12   ` Vinod Koul
2021-10-01  8:12     ` Vinod Koul
2021-09-28  7:34 ` [PATCH v12 02/11] PCI: kirin: Reorganize the PHY logic inside the driver Mauro Carvalho Chehab
2021-09-28  7:34 ` Mauro Carvalho Chehab [this message]
2021-10-05 20:31   ` [PATCH v12 03/11] PCI: kirin: Add support for a PHY layer Pali Rohár
2021-10-05 22:33     ` Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 04/11] PCI: kirin: Use regmap for APB registers Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 05/11] PCI: kirin: Add support for bridge slot DT schema Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 06/11] PCI: kirin: Add Kirin 970 compatible Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 07/11] PCI: kirin: Add MODULE_* macros Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 08/11] PCI: kirin: Allow building it as a module Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 09/11] PCI: kirin: Add power_off support for Kirin 960 PHY Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 10/11] PCI: kirin: fix poweroff sequence Mauro Carvalho Chehab
2021-09-28  7:34 ` [PATCH v12 11/11] PCI: kirin: Allow removing the driver Mauro Carvalho Chehab
2021-10-05  9:24 ` [PATCH v12 00/11] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
2021-10-05  9:24   ` Mauro Carvalho Chehab
2021-10-05 18:23   ` Bjorn Helgaas
2021-10-05 18:23     ` Bjorn Helgaas
2021-10-07 14:41     ` Lorenzo Pieralisi
2021-10-07 14:41       ` Lorenzo Pieralisi
2021-10-08 10:55       ` Mauro Carvalho Chehab
2021-10-08 10:55         ` Mauro Carvalho Chehab
2021-10-08 17:34         ` Lorenzo Pieralisi
2021-10-08 17:34           ` Lorenzo Pieralisi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=8a6d353145c0ec169d212094f5d534f93e2597f8.1632814194.git.mchehab+huawei@kernel.org \
    --to=mchehab+huawei@kernel.org \
    --cc=bhelgaas@google.com \
    --cc=kw@linux.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=linuxarm@huawei.com \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=mauro.chehab@huawei.com \
    --cc=robh@kernel.org \
    --cc=songxiaowei@hisilicon.com \
    --cc=wangbinghui@hisilicon.com \
    --subject='Re: [PATCH v12 03/11] PCI: kirin: Add support for a PHY layer' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.