linux-kernel - [PATCH] ahci_qoriq: enable acpi support in qoriq ahci driver

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Date:   Tue, 17 Mar 2020 16:52:54 +0800
From:   Peng Ma <peng.ma@....com>
To:     axboe@...nel.dk
Cc:     leoyang.li@....com, andy.tang@....com, linux-ide@...r.kernel.org,
        linux-kernel@...r.kernel.org, Udit Kumar <udit.kumar@....com>,
        Peng Ma <peng.ma@....com>
Subject: [PATCH] ahci_qoriq: enable acpi support in qoriq ahci driver

From: Udit Kumar <udit.kumar@....com>

This patch enables ACPI support in qoriq ahci driver.

Signed-off-by: Udit Kumar <udit.kumar@....com>
Signed-off-by: Peng Ma <peng.ma@....com>
---
 drivers/ata/ahci_qoriq.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index a330307..f0f7723 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -6,6 +6,7 @@
  *   Tang Yuantian <Yuantian.Tang@...escale.com>
  */
 
+#include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pm.h>
@@ -80,6 +81,12 @@ static const struct of_device_id ahci_qoriq_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, ahci_qoriq_of_match);
 
+static const struct acpi_device_id ahci_qoriq_acpi_match[] = {
+	{"NXP0004", .driver_data = (kernel_ulong_t)AHCI_LX2160A},
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, ahci_qoriq_acpi_match);
+
 static int ahci_qoriq_hardreset(struct ata_link *link, unsigned int *class,
 			  unsigned long deadline)
 {
@@ -261,25 +268,28 @@ static int ahci_qoriq_probe(struct platform_device *pdev)
 	const struct of_device_id *of_id;
 	struct resource *res;
 	int rc;
+	const struct acpi_device_id *acpi_id;
 
 	hpriv = ahci_platform_get_resources(pdev, 0);
 	if (IS_ERR(hpriv))
 		return PTR_ERR(hpriv);
 
 	of_id = of_match_node(ahci_qoriq_of_match, np);
-	if (!of_id)
+	acpi_id = acpi_match_device(ahci_qoriq_acpi_match, &pdev->dev);
+	if (!(of_id || acpi_id))
 		return -ENODEV;
 
 	qoriq_priv = devm_kzalloc(dev, sizeof(*qoriq_priv), GFP_KERNEL);
 	if (!qoriq_priv)
 		return -ENOMEM;
 
-	qoriq_priv->type = (enum ahci_qoriq_type)of_id->data;
+	if (of_id)
+		qoriq_priv->type = (enum ahci_qoriq_type)of_id->data;
+	else
+		qoriq_priv->type = (enum ahci_qoriq_type)acpi_id->driver_data;
 
 	if (unlikely(!ecc_initialized)) {
-		res = platform_get_resource_byname(pdev,
-						   IORESOURCE_MEM,
-						   "sata-ecc");
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 		if (res) {
 			qoriq_priv->ecc_addr =
 				devm_ioremap_resource(dev, res);
@@ -288,7 +298,8 @@ static int ahci_qoriq_probe(struct platform_device *pdev)
 		}
 	}
 
-	qoriq_priv->is_dmacoherent = of_dma_is_coherent(np);
+	if (device_get_dma_attr(&pdev->dev) == DEV_DMA_COHERENT)
+		qoriq_priv->is_dmacoherent = true;
 
 	rc = ahci_platform_enable_resources(hpriv);
 	if (rc)
@@ -354,6 +365,7 @@ static struct platform_driver ahci_qoriq_driver = {
 	.driver = {
 		.name = DRV_NAME,
 		.of_match_table = ahci_qoriq_of_match,
+		.acpi_match_table = ahci_qoriq_acpi_match,
 		.pm = &ahci_qoriq_pm_ops,
 	},
 };
-- 
2.9.5